CN117589833B - Self-powered low-humidity sensor and preparation method thereof - Google Patents
Self-powered low-humidity sensor and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 239000012621 metal-organic framework Substances 0.000 claims abstract description 28
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000001291 vacuum drying Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000013207 UiO-66 Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002390 adhesive tape Substances 0.000 claims 6
- 238000001548 drop coating Methods 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 10
- 230000003068 static effect Effects 0.000 abstract description 10
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000010494 dissociation reaction Methods 0.000 abstract description 4
- 230000005593 dissociations Effects 0.000 abstract description 4
- 230000004044 response Effects 0.000 description 10
- 150000002500 ions Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- WKRAAYBBGZJLGO-UHFFFAOYSA-M lithium;ethanol;bromide Chemical compound [Li+].[Br-].CCO WKRAAYBBGZJLGO-UHFFFAOYSA-M 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000004729 solvothermal method Methods 0.000 description 4
- 230000002194 synthesizing effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000036647 reaction Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- KCBAIEZSAJCIEW-UHFFFAOYSA-M lithium;ethanol;chloride Chemical compound [Li+].[Cl-].CCO KCBAIEZSAJCIEW-UHFFFAOYSA-M 0.000 description 2
- LOHGGLZYTJNUAL-UHFFFAOYSA-M sodium;ethanol;chloride Chemical compound [Na+].[Cl-].CCO LOHGGLZYTJNUAL-UHFFFAOYSA-M 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
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- General Health & Medical Sciences (AREA)
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Abstract
The invention relates to the technical field of humidity sensing, and particularly discloses a self-powered low-humidity sensor and a preparation method thereof, wherein the sensor comprises a substrate and electrodes connected to two sides of the substrate, a humidity sensing film is arranged in a region between the electrodes on the two sides of the substrate, and the humidity sensing film is a metal organic frame material loaded by inorganic salt; the preparation method comprises the following steps: preparing an aqueous dispersion of an inorganic salt-loaded metal organic framework material; and (3) sticking electrodes on two sides of the substrate, coating the aqueous dispersion of the inorganic salt loaded metal organic frame material on the substrate in a region between the electrodes on the two sides, and vacuum drying to obtain the self-powered low-humidity sensor. The self-powered low-humidity sensor prepared by the invention has strong hydrophilicity, strong ion dissociation capability and primary battery reaction, so that the sensor element realizes self-powered low-humidity sensing, does not need to be powered by an external power supply, has high sensitivity and high stability on low humidity, and can meet the detection requirements of static low humidity and dynamic low humidity.
Description
Technical Field
The invention belongs to the technical field of humidity sensing, and particularly relates to a self-powered low-humidity sensor and a preparation method thereof.
Background
The low humidity environment has wide application in the fields of semiconductor manufacturing, power transmission, aerospace and the like. Therefore, the method has important application significance for accurately detecting low humidity. Currently, low humidity detection techniques mainly include spectroscopy, chromatography, and low humidity sensors. However, spectroscopy and chromatography have the disadvantages of high cost, complex operation and inability to detect in real time, and thus have limited use scenarios. The low humidity sensor mainly includes a resistive type, a capacitive type, an impedance type, a mass type, and an optical type.
There are few reports related to low humidity sensors at present, wherein the impedance type low humidity sensor can realize low humidity sensing, but needs an external power supply to supply power, and has poor sensitivity and response/recovery time, so that the detection requirements of static low humidity and dynamic low humidity cannot be met at the same time.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a self-powered low-humidity sensor made of inorganic salt loaded metal-organic framework material, which can simultaneously meet the requirements of high-sensitivity static and dynamic low-humidity detection and does not need external power supply.
Specifically, the first aspect of the invention provides a self-powered low-humidity sensor, which comprises a substrate and electrodes connected to two sides of the substrate, wherein a humidity sensing film is arranged in a region between the electrodes on two sides of the substrate, and the humidity sensing film is an inorganic salt loaded metal-organic frame material.
As a further explanation of the invention, the electrodes are two of aluminum tape, copper tape, zinc tape, gold tape and silver tape, the distance between the electrodes at two sides is 0.1-1 mm, and the electrode area is 0.5-2 cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The substrate is one of glass, PET and paper.
As a further explanation of the present invention, the inorganic salt is one of lithium bromide, lithium chloride and sodium chloride; the metal organic framework is one of MOF-801, MOF-303 and UiO-66.
The second aspect of the present invention provides a method for preparing the self-powered low humidity sensor, which comprises the following steps:
preparing an aqueous dispersion of an inorganic salt-loaded metal organic framework material;
and (3) sticking electrodes on two sides of a substrate, coating the aqueous dispersion of the inorganic salt loaded metal organic framework material on the substrate in a region between the electrodes on the two sides, and vacuum drying to obtain the self-powered low-humidity sensor.
As a further explanation of the present invention, the concentration of the aqueous dispersion of the inorganic salt-supported metal organic framework material is 10 to 100 mg/mL.
As a further illustration of the present invention, the preparation process of the inorganic salt-loaded metal organic framework material comprises:
dispersing the metal organic frame material in an ethanol solution of inorganic salt, and stirring until the material is dried after ultrasonic treatment.
As a further explanation of the invention, the concentration of the ethanol solution of the inorganic salt is 2-200 mg/mL, the mass of the metal organic frame material is 48-200 mg, the volume of the ethanol solution of the inorganic salt is 1-2 mL, and the mass fraction of the inorganic salt to the metal organic frame material loaded by the inorganic salt is 4-50 wt%.
As a further explanation of the present invention, the aqueous dispersion of the inorganic salt-supported metal organic frame material is coated on the substrate by a dropping method, and the dropping amount of the aqueous dispersion of the inorganic salt-supported metal organic frame material is 2 to 20 μl.
Compared with the prior art, the invention has the following beneficial technical effects:
the self-powered low-humidity sensor based on the inorganic salt loaded metal organic framework material provided by the invention has strong hydrophilicity, strong ion dissociation capability and primary cell reaction, so that the sensor element realizes self-powered low-humidity sensing, does not need an external power supply, has high sensitivity and high stability on low humidity, and can meet the detection requirements of static low humidity and dynamic low humidity.
Drawings
FIG. 1 is an XRD pattern of an inorganic salt-loaded metal-organic framework material according to example 1 of the present invention;
FIG. 2 is a graph of thermal weight loss of inorganic salt loaded metal organic framework material in example 1 of the present invention;
FIG. 3 is a top view of the self-powered low humidity sensor of embodiments 1-4 of the present invention;
FIG. 4 is a front view of the self-powered low humidity sensor of embodiments 1-4 of the present invention;
FIG. 5 is a graph showing the continuous voltage response of the self-powered low humidity sensor of example 1 of the present invention under dynamic low humidity;
FIG. 6 is a graph showing the cyclic response of the self-powered low humidity sensor of example 1 of the present invention at low humidity;
FIG. 7 is a response/recovery curve at 23% RH for the self-powered low humidity sensor of example 1 of the present invention;
FIG. 8 is a voltage response curve of the self-powered low humidity sensor of example 1 of the present invention at a static low humidity of 1 h;
fig. 9 shows the output voltage and current of the self-powered low humidity sensor of example 1 under different loads.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 3 and 4, the present embodiment provides a self-powered low humidity sensor, which includes a substrate and electrodes connected to two sides of the substrate, wherein a humidity sensing film is disposed in a region between the electrodes on two sides of the substrate, and the humidity sensing film is an inorganic salt loaded metal-organic frame material.
Wherein the electrodes on both sides are specifically copper tape and zinc tape, the distance between the electrodes on both sides is 1 mm, and the electrode area is 1 cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The substrate is glass, the inorganic salt is lithium bromide, and the metal organic framework is MOF-801.
The preparation method of the self-powered low-humidity sensor comprises the following steps of:
step 1: synthesizing MOF-801 by a solvothermal method;
step 2: preparing 10 mg/mL of lithium bromide ethanol solution;
step 3: uniformly dispersing MOF-801 of 80 mg in a lithium bromide ethanol solution of 2 mL, carrying out ultrasonic treatment for 20 minutes, and stirring at room temperature until the solution is dried to obtain a lithium bromide-loaded metal organic framework material, wherein the structure and the components of the obtained material are shown in figures 1 and 2;
step 4: preparing 100 mg/mL of lithium bromide supported MOF-801 aqueous dispersion;
step 5: copper glue is adhered on the left side and the right side of the glass substrateThe distance between the electrodes of the tape and the zinc tape is 1 mm, and the electrode area is 1 cm 2 And transferring 10 mu L of dispersed liquid drops to gaps between the electrodes, and vacuum drying to obtain the self-powered low-humidity sensor element.
In this example, since the lithium bromide-supported MOF-801 is highly hydrophilic, the material can adsorb water molecules in a low humidity environment, wherein lithium bromide can dissociate into anions (Br – ) And cations (Li) + ) The water molecules dissociate into hydrogen ions (H + ) And hydroxide ion (OH) – ). The anions and cations can directionally move towards the electrodes at the two sides, and primary cell reaction occurs on the electrodes, so that voltage is generated between the electrodes at the two sides of the sensor, and self-power supply is realized. By changing the humidity, the adsorption quantity of water molecules of the material can be changed, the concentration of the reactive ions in the sensor is changed, the output voltage is changed, and the low-humidity sensing is realized.
The present embodiment defines the sensitivity of the sensor as s= (V) x -V 0 ) X, where V 0 Output voltage of sensor at 0% RH (% RH, relative humidity), V x The output voltage of the sensor is x% RH (x: 0-23); the response/recovery time is the time taken for the sensor's voltage signal to reach 90% change.
Figure 5 shows a continuous voltage response curve of the sensor at dynamic low humidity. The output voltage of the sensor is different at different humidities, wherein when the humidity increases, the output voltage increases, and when the humidity decreases to 0% RH, the output voltage of the sensor also decreases to 0 mV. In the humidity range of 0-23% RH, the sensitivity S of the sensor is 26.52 mV/% RH; indicating that it can be applied to self-powered dynamic low humidity detection.
Fig. 6 shows the cycling response curve of the sensor at low humidity. In 1600 s, the humidity is switched between 0% RH and 23% RH for a plurality of times, the output voltage of the sensor is changed along with the change, and the Relative Standard Deviation (RSD) is 0.095%; indicating that it has good low humidity sensing cycle stability.
Fig. 7 shows the response/recovery curve of the sensor at low humidity. When humidity is switched from 0% RH to 23% RH, the output voltage of the sensor reaches equilibrium after 64 s, and when humidity is switched from 23% RH to 0% RH, the output voltage of the sensor decreases to equilibrium after 104 s; indicating that it has better self-powered low humidity sensing performance.
Referring to fig. 5 to fig. 7, it can be seen that the self-powered low humidity sensor provided in the embodiment continuously has voltage output under dynamic low humidity, which indicates that the self-powered low humidity sensor has the capability of dynamic low humidity detection; indicating that it has better self-powered low humidity sensing performance.
Fig. 8 shows a voltage response curve of the sensor at 1 h at static low humidity. Within 1 h, the output voltage of the sensor is stable, and the voltage value is reduced by 6.56%; the self-powered static low-humidity detection device can be used for outputting voltage which can be stabilized for a long time under static low-humidity and can be applied to self-powered static low-humidity detection.
Fig. 9 shows the output voltage and current of the sensor under different loads. When the load resistance is increased at 23% RH, the output voltage is increased, the output current is reduced, the optimal load resistance is 1-M omega, and the maximum output power is 0.41 mu W/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the Indicating that it can output energy externally without the need for an external power supply.
Example 2
As shown in fig. 3 and 4, the present embodiment provides a self-powered low humidity sensor, which includes a substrate and electrodes connected to two sides of the substrate, wherein a humidity sensing film is disposed in a region between the electrodes on two sides of the substrate, and the humidity sensing film is an inorganic salt loaded metal-organic frame material.
Wherein the two side electrodes are specifically aluminum tape and silver tape, the distance between the two side electrodes is 0.1 mm, and the electrode area is 0.5 cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The substrate is paper, the inorganic salt is lithium chloride, and the metal organic framework is MOF-303.
The preparation method of the self-powered low-humidity sensor comprises the following steps of:
step 1: synthesizing MOF-303 by a solvothermal method;
step 2: preparing a lithium chloride ethanol solution with the concentration of 2 mg/mL;
step 3: uniformly dispersing the MOF-303 of 48 mg in a lithium chloride ethanol solution of 1 mL, performing ultrasonic treatment for 20 minutes, and stirring at room temperature until the MOF-303 is dried to obtain a lithium chloride loaded MOF-303;
step 4: preparing 10 mg/mL of lithium chloride loaded MOF-303 aqueous dispersion;
step 5: aluminum tape and silver tape were attached to the left and right sides of the paper substrate with a distance between the electrodes of 0.1. 0.1 mm and an electrode area of 0.5. 0.5 cm 2 2 mu L of dispersed liquid drops are removed at the gaps between the electrodes, and after vacuum drying, the self-powered low-humidity sensor element is obtained.
Example 3
As shown in fig. 3 and 4, the present embodiment provides a self-powered low humidity sensor, which includes a substrate and electrodes connected to two sides of the substrate, wherein a humidity sensing film is disposed in a region between the electrodes on two sides of the substrate, and the humidity sensing film is an inorganic salt loaded metal-organic frame material.
Wherein the electrodes on both sides are specifically gold tape and zinc tape, the distance between the electrodes on both sides is 0.5 mm, and the electrode area is 1.5 cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The substrate is PET, and the inorganic salt is sodium chloride; the metal organic framework is UiO-66.
The preparation method of the self-powered low-humidity sensor comprises the following steps of:
step 1: synthesizing UiO-66 by a solvothermal method;
step 2: preparing 50 mg/mL sodium chloride ethanol solution;
step 3: uniformly dispersing the UiO-66 of 150 mg in a sodium chloride ethanol solution of 1.5 mL, performing ultrasonic treatment for 20 minutes, and stirring at room temperature until the mixture is dried to obtain the product; sodium chloride loaded UiO-66;
step 4: preparing 50 mg/mL inorganic salt loaded aqueous dispersion of UiO-66;
step 5: gold tape and zinc tape were adhered to the left and right sides of the PET substrate with a distance between the electrodes of 0.5. 0.5 mm and an electrode area of 1.5. 1.5 cm 2 And 5 mu L of dispersed liquid drops are removed at the gaps between the electrodes, and after vacuum drying, the self-powered low-humidity sensor element is obtained.
Example 4
As shown in fig. 3 and 4, the present embodiment provides a self-powered low humidity sensor, which includes a substrate and electrodes connected to two sides of the substrate, wherein a humidity sensing film is disposed in a region between the electrodes on two sides of the substrate, and the humidity sensing film is an inorganic salt loaded metal-organic frame material.
Wherein the electrodes on both sides are specifically copper tape and zinc tape, the distance between the electrodes on both sides is 1 mm, and the electrode area is 2 cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The substrate is glass, the inorganic salt is lithium bromide, and the metal organic framework is MOF-801.
The preparation method of the self-powered low-humidity sensor comprises the following steps of:
step 1: synthesizing MOF-801 by a solvothermal method;
step 2: preparing 200 mg/mL lithium bromide ethanol solution;
step 3: uniformly dispersing the MOF-801 of 200 mg in a lithium bromide ethanol solution of 1 mL, performing ultrasonic treatment for 20 minutes, and stirring at room temperature until the MOF-801 is dried to obtain a lithium bromide loaded MOF-801;
step 4: preparing 70 mg/mL of lithium bromide supported MOF-801 aqueous dispersion;
step 5: copper tape and zinc tape were attached to the left and right sides of the glass substrate with a distance between the electrodes of 1 mm and an electrode area of 2 cm 2 And transferring 20 mu L of dispersed liquid drops to gaps between the electrodes, and vacuum drying to obtain the self-powered low-humidity sensor element.
The inorganic salt in the embodiment of the invention has strong hydrophilicity and dissociation capability, and can be dissolved in ethanol; the metal organic framework material has strong hydrophilicity, high porosity and high stability; the inorganic salt loaded metal organic framework material prepared by the method has strong hydrophilicity, high stability and high ion concentration, and can be applied to self-powered low-humidity sensing.
The preparation method of the self-powered low-humidity sensor based on the inorganic salt loaded metal-organic framework material is simple, low in cost and capable of being prepared in batches, and the performance of the self-powered low-humidity sensor can be regulated and controlled by adjusting the proportion of the materials.
The self-powered low-humidity sensor based on the inorganic salt loaded metal organic framework material provided by the embodiment of the invention has strong hydrophilicity, strong ion dissociation capability and primary cell reaction, so that the sensor element realizes self-powered low-humidity sensing, does not need an external power supply, has high sensitivity and high stability on low humidity, and meets the detection requirements of static low humidity and dynamic low humidity.
According to the embodiment of the invention, the self-powered low-humidity sensor based on the inorganic salt loaded metal organic framework material does not consume the material of the humidity sensing film in the sensing process, so that the stability and the service life of the element low-humidity sensing are improved.
It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The self-powered low-humidity sensor is characterized by comprising a substrate and electrodes connected to two sides of the substrate, wherein a humidity sensing film is arranged in a region between the electrodes on two sides of the substrate, and the humidity sensing film is a metal organic framework material loaded by inorganic salt; the electrodes on the two sides are specifically one of a copper adhesive tape and a zinc adhesive tape, an aluminum adhesive tape and a silver adhesive tape, or a gold adhesive tape and a zinc adhesive tape; the substrate is one of glass, PET and paper;
the preparation method of the power supply low humidity sensor comprises the following steps:
preparing an aqueous dispersion of an inorganic salt-loaded metal organic framework material;
pasting electrodes on two sides of a substrate, coating aqueous dispersion of inorganic salt loaded metal organic frame materials on the substrate in a region between the electrodes on two sides, and vacuum drying to obtain a self-powered low-humidity sensor;
the preparation process of the inorganic salt loaded metal organic framework material comprises the following steps: dispersing a metal organic framework material in an ethanol solution of inorganic salt, and stirring until the mixture is dried after ultrasonic treatment; the inorganic salt accounts for 4-50wt% of the inorganic salt loaded metal organic frame material; the metal organic framework is one of MOF-801, MOF-303 and UiO-66.
2. The self-powered low humidity sensor according to claim 1, wherein the inorganic salt is one of lithium bromide, lithium chloride, sodium chloride.
3. The self-powered low humidity sensor according to claim 1 wherein the concentration of the aqueous dispersion of inorganic salt-loaded metal organic framework material is 10-100 mg/mL.
4. The self-powered low humidity sensor according to claim 1 wherein the concentration of the ethanol solution of the inorganic salt is 2-200 mg/mL, the mass of the metal organic frame material is 48-200 mg, and the volume of the ethanol solution of the inorganic salt is 1-2 mL.
5. The self-powered low humidity sensor according to claim 1 wherein the aqueous dispersion of inorganic salt-loaded metal organic framework material is applied to the substrate by a drop coating method, the drop coating amount of the aqueous dispersion of inorganic salt-loaded metal organic framework material being 2 to 20 μl.
6. The self-powered low humidity sensor according to claim 1 wherein the distance between the electrodes on both sides is 0.1-1 mm and the electrode area is 0.5-2 cm 2 。
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5533393A (en) * | 1995-01-13 | 1996-07-09 | Honeywell Inc. | Determination of dew point or absolute humidity |
| AT508976A1 (en) * | 2009-10-30 | 2011-05-15 | Hagl Peter Dipl Ing | HUMIDITY SENSOR |
| CN112649477A (en) * | 2019-10-12 | 2021-04-13 | 中国科学院大连化学物理研究所 | With rGO/In2O3Self-generating gas sensor as electrode material |
| CN112755965A (en) * | 2021-02-25 | 2021-05-07 | 北京工业大学 | Preparation method of composite dehumidifying adsorbent paper sheet made of MOF material and lithium chloride |
| WO2021174310A1 (en) * | 2020-03-06 | 2021-09-10 | Royal Melbourne Institute Of Technology | Metal organic frameworks |
| CN114166901A (en) * | 2021-12-06 | 2022-03-11 | 吉林大学 | Gold nanoparticle-loaded metal organic framework material, low-humidity sensor with gold nanoparticle-loaded metal organic framework material as sensing material and preparation method of low-humidity sensor |
| CN116773052A (en) * | 2023-08-23 | 2023-09-19 | 电子科技大学 | Ion gradient power generation type flexible pressure sensor and preparation method thereof |
| CN117229540A (en) * | 2023-05-29 | 2023-12-15 | 浙江大学 | Preparation method of humidity-sensitive polyvinyl alcohol/lithium chloride/MXene composite film |
| CN117309940A (en) * | 2023-09-05 | 2023-12-29 | 安徽农业大学 | Flexible self-powered humidity sensor based on zinc oxide piezoelectricity and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019033104A1 (en) * | 2017-08-11 | 2019-02-14 | Trustees Of Dartmouth College | Metal-organic frameworks as ion-to-electron transducers and detectors |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5533393A (en) * | 1995-01-13 | 1996-07-09 | Honeywell Inc. | Determination of dew point or absolute humidity |
| AT508976A1 (en) * | 2009-10-30 | 2011-05-15 | Hagl Peter Dipl Ing | HUMIDITY SENSOR |
| CN112649477A (en) * | 2019-10-12 | 2021-04-13 | 中国科学院大连化学物理研究所 | With rGO/In2O3Self-generating gas sensor as electrode material |
| WO2021174310A1 (en) * | 2020-03-06 | 2021-09-10 | Royal Melbourne Institute Of Technology | Metal organic frameworks |
| CN112755965A (en) * | 2021-02-25 | 2021-05-07 | 北京工业大学 | Preparation method of composite dehumidifying adsorbent paper sheet made of MOF material and lithium chloride |
| CN114166901A (en) * | 2021-12-06 | 2022-03-11 | 吉林大学 | Gold nanoparticle-loaded metal organic framework material, low-humidity sensor with gold nanoparticle-loaded metal organic framework material as sensing material and preparation method of low-humidity sensor |
| CN117229540A (en) * | 2023-05-29 | 2023-12-15 | 浙江大学 | Preparation method of humidity-sensitive polyvinyl alcohol/lithium chloride/MXene composite film |
| CN116773052A (en) * | 2023-08-23 | 2023-09-19 | 电子科技大学 | Ion gradient power generation type flexible pressure sensor and preparation method thereof |
| CN117309940A (en) * | 2023-09-05 | 2023-12-29 | 安徽农业大学 | Flexible self-powered humidity sensor based on zinc oxide piezoelectricity and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 金属有机框架材料低温度传感器的研究;吴可;中国优秀博士学位论文全文数据库工程科技I辑;20181231;C020-127 * |
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