CN112611786A - Preparation of graphene-loaded tin dioxide quantum dot for formaldehyde and nitrogen dioxide gas detection, product and application - Google Patents
Preparation of graphene-loaded tin dioxide quantum dot for formaldehyde and nitrogen dioxide gas detection, product and application Download PDFInfo
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- 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
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- G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
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Abstract
The invention discloses a preparation method of graphene-loaded tin dioxide quantum dots for formaldehyde and nitrogen dioxide gas detection, and a product and application thereof2In the preparation process of the quantum dot modified graphene, tin salt and zinc salt are adopted as precursors, the precursors are mixed with graphene oxide and then subjected to hydrothermal reaction, and then the step of acid washing is adopted to remove Zn in the product, so that the surface and the interior of the metal oxide have more defect states, and the existence of the defect states can improve the adsorption of the material on target gas and preferentially carry out catalytic reaction, thereby improving the sensitivity of the material for gas detection; the metal oxide is compounded with the graphene, so that the conductivity of the graphene can be improved, and the catalytic reaction on the target gas at room temperature is realized, so that NO is realized at room temperature2Detection of (3).
Description
Technical Field
The invention relates to the field of gas detection, in particular to a preparation method of a gas sensitive material, and particularly relates to a preparation method of graphene-loaded tin dioxide quantum dots for detecting formaldehyde and nitrogen dioxide gas, and a product and application thereof.
Background
With increasing environmental pollution, especially NO2Is the waste gas of automobile exhaust and coal combustion, has great harm to human health when formaldehyde is used as the waste gas of coating and paint, and has NO effect on formaldehyde and NO2And the detection of toxic and harmful gases is the primary task of environmental management.
The metal oxide can be used as a gas detection sensitive material because the resistance changes under the gas atmosphere with different concentrations, and has competitive advantages compared with other types of sensors because the metal oxide is cheap. However, the metal oxide has a high working temperature, generally above 200 ℃, and the sensitivity and selectivity are not ideal. The reaction temperature can be reduced and the sensitivity can be improved by constructing the nano material and the composite material.
The present invention utilizes SnO2Quantum dot modified graphene and SnO comprehensive utilization2The gas response and the conductivity of graphene improve the defects of the gas sensitive material in the aspects of high sensitivity and high working temperature, and the material prepared by the method can realize the reaction of NO at room temperature2And (3) detecting the gas, namely detecting the formaldehyde gas at the working temperature of about 180 ℃.
Disclosure of Invention
The invention aims to provide a preparation method of graphene-loaded tin dioxide quantum dots for detecting formaldehyde and nitrogen dioxide gases.
Yet another object of the present invention is to: provides a product prepared by the method.
Yet another object of the present invention is to: provides an application of the product.
The purpose of the invention is realized by the following scheme: a preparation method of graphene-loaded tin dioxide quantum dots for formaldehyde and nitrogen dioxide gas detection utilizes SnO2In the preparation process of the quantum dot modified graphene, a precursor adopts tin salt and zinc salt, and is mixed with graphene oxide for hydrothermal reaction, and then, the step of acid washing is adopted to remove Zn in the product, so that the surface and the inside of the metal oxide have more defect states, and the existence of the defect states can improve the adsorption of the material to target gas and preferentially catalyze the reaction, and the preparation method comprises the following steps:
the method comprises the following steps: weighing 2-5 mmol of tin salt and 0.1-0.5 mmol of zinc salt in 10mL of deionized water, and dissolving in the deionized water;
step two: taking 10mL of deionized water, preparing an aqueous solution of a triblock polymer with the molar concentration of 0.8-1.2M, slowly dropping the solution obtained in the step one into the aqueous solution of the triblock polymer under the stirring state, continuously stirring for 30-50 min, adding 1-3 mL of hydrochloric acid, and continuously stirring for 30-50 min;
step three: adding 5-10 mL of graphene oxide with the concentration of 1mg/mL into the solution obtained in the second step, stirring for 1-2 h, carrying out hydrothermal reaction at 180-200 ℃, cooling to room temperature, centrifuging, collecting precipitate, and drying at 60-80 ℃ to obtain powder;
step four: putting the powder obtained in the step three into a nitric acid aqueous solution with the concentration of 1-2M, and carrying out hydrothermal reaction at 160-180 ℃ for 12-14 h to obtain graphene-loaded SnO2And (4) quantum dots.
Wherein, in the step one, the tin salt is SnCl4·5H2O，SnCl2·2H2O，Sn(Ac)2At least one of; the zinc salt is Zn (NO)3)2·6H2O，Zn(AC)2，ZnCl2，ZnSO4At least one of (1).
In the second step, the triblock polymer is at least one of P123 or F127.
The invention also provides a graphene-loaded tin dioxide quantum dot product for detecting formaldehyde and nitrogen dioxide gas, and the graphene-loaded tin dioxide quantum dot product is prepared according to any one of the methods.
The invention also provides application of the graphene-loaded tin dioxide quantum dot in detection of formaldehyde and nitrogen dioxide gas.
The powder prepared by the invention is dispersedly coated on a six-pin ceramic tube gas-sensitive test element for respectively testing NO2And response of formaldehyde gas to NO2The optimum corresponding temperature is room temperature for NO concentration of 1ppm2The corresponding sensitivity of the gas is 11.9-15.1, the optimal corresponding temperature for formaldehyde gas is 180 ℃, and the response sensitivity for formaldehyde gas with the concentration of 10ppm is 25.8-30.9.
The invention provides a simple and feasible SnO2According to the method for modifying graphene by using quantum dots, the composite material prepared by the method can be used for detecting different target gases at different temperatures. The method utilizes SnO2In the preparation process of the quantum dot modified graphene, tin salt and zinc salt are adopted as precursors, the precursors are mixed with graphene oxide and then subjected to hydrothermal reaction, and then the step of acid washing is adopted to remove Zn in the product, so that the surface and the interior of the metal oxide have more defect states, and the existence of the defect states can improve the adsorption of the material on target gas and preferentially carry out catalytic reaction, thereby improving the sensitivity of the material for gas detection; the metal oxide is compounded with the graphene, so that the conductivity of the graphene can be improved, and the catalytic reaction on the target gas at room temperature is realized, so that NO is realized at room temperature2Detection of (3).
Drawings
FIG. 1 shows that the graphene loaded SnO prepared by the invention2Quantum dot pair NO2And formaldehyde gas working schematic.
Detailed Description
Example 1:
graphene-loaded tin dioxide quantum dot for detecting formaldehyde and nitrogen dioxide gas by using SnO2In the preparation process of the quantum dot modified graphene, tin salt and zinc salt are adopted as precursors, the precursors are mixed with graphene oxide and then subjected to hydrothermal reaction, and then, the step of acid washing is adopted to remove Zn in the product, so that the surface and the interior of the metal oxide have more defect states and defect statesThe catalyst is prepared by the following steps:
the method comprises the following steps: taking 10mL of deionized water, weighing 5mmol of tin salt SnCl4·5H2O and 0.1mmol of Zn (NO)3)2·6H2Dissolving O in deionized water;
step two: taking 10mL of deionized water, preparing an aqueous solution of a triblock polymer P123 with the molar concentration of 1.0M, slowly dropping the solution obtained in the step one into the aqueous solution of the triblock polymer P123 under the stirring state, continuously stirring for 50min, adding 2mL of hydrochloric acid, and continuously stirring for 30 min;
step three: adding 10mL of graphene oxide with the concentration of 1mg/mL into the solution obtained in the second step, stirring for 2h, carrying out hydrothermal reaction at 180 ℃, cooling to room temperature, centrifuging, collecting precipitate, and drying at 80 ℃ to obtain powder;
step four: putting the powder obtained in the step three into a nitric acid aqueous solution with the concentration of 1M, and carrying out hydrothermal reaction for 12h at 180 ℃ to obtain graphene-loaded SnO2And (4) quantum dots. Prepared graphene-loaded SnO2Quantum dot pair NO2And formaldehyde gas as shown in figure 1:
the powder prepared in the embodiment is dispersedly coated on a six-pin ceramic tube gas-sensitive test element to respectively test NO2And response of formaldehyde gas to NO2The optimum corresponding temperature is room temperature for NO concentration of 1ppm2The corresponding sensitivity of the gas is 13.5, the optimal corresponding temperature for formaldehyde gas is 180 ℃, and the response sensitivity for formaldehyde gas with the concentration of 10ppm is 25.8.
Example 2:
similar to example 1, the graphene-supported tin dioxide quantum dot for detecting formaldehyde and nitrogen dioxide gas is prepared by the following steps:
the method comprises the following steps: taking 10mL of deionized water, weighing 2mmol of tin salt SnCl2·2H2O and 0.1mmol of Zn (NO)3)2·6H2Dissolving O in deionized water;
step two: taking 10mL of deionized water, preparing an aqueous solution of a triblock polymer P123 with the molar concentration of 0.8M, slowly dropping the solution obtained in the step one into the aqueous solution of the triblock polymer P123 under the stirring state, continuously stirring for 50min, adding 1mL of hydrochloric acid, and continuously stirring for 30 min;
step three: adding 5mL of graphene oxide with the concentration of 1mg/mL into the solution obtained in the second step, stirring for 2h, carrying out hydrothermal reaction at 180 ℃, cooling to room temperature, centrifuging, collecting precipitate, and drying at 80 ℃ to obtain powder;
step four: putting the powder obtained in the step three into a nitric acid aqueous solution with the concentration of 2M, and carrying out hydrothermal reaction for 12h at 180 ℃ to obtain graphene-loaded SnO2And (4) quantum dots.
The powder prepared in the embodiment is dispersedly coated on a six-pin ceramic tube gas-sensitive test element to respectively test NO2And response of formaldehyde gas to NO2The optimum corresponding temperature is room temperature for NO concentration of 1ppm2The gas response sensitivity is 11.9, the optimal response temperature for formaldehyde gas is 180 ℃, and the response sensitivity for formaldehyde gas with the concentration of 10ppm is 28.4.
Example 3:
similar to example 1, the graphene-supported tin dioxide quantum dot for detecting formaldehyde and nitrogen dioxide gas is prepared by the following steps:
the method comprises the following steps: taking 10mL of deionized water, weighing 3mmol of tin salt Sn (Ac)2And 0.3mmol of the Zinc salt Zn (AC)2Dissolving in deionized water;
step two: taking 10mL of deionized water, preparing an aqueous solution of a triblock polymer P127 with the molar concentration of 1.2M, slowly dropping the solution obtained in the step one into the aqueous solution of the P127 under the stirring state, continuously stirring for 50min, adding 3mL of hydrochloric acid, and continuously stirring for 30 min;
step three: adding 5mL of graphene oxide with the concentration of 1mg/mL into the solution obtained in the second step, stirring for 2h, carrying out hydrothermal reaction at 200 ℃, cooling to room temperature, centrifuging, collecting precipitate, and drying at 80 ℃ to obtain powder;
step four: putting the powder obtained in the step three into a nitric acid aqueous solution with the concentration of 2M, and carrying out hydrothermal reaction for 12h at 160 ℃ to obtain graphene-loaded SnO2And (4) quantum dots.
The powder prepared in this example was dispersed and coated on a six-legged ceramic tube gas sensitive test element,test NO separately2And response of formaldehyde gas to NO2The optimum corresponding temperature is room temperature for NO concentration of 1ppm2The corresponding sensitivity of the gas is 15.1, the optimal corresponding temperature for formaldehyde gas is 180 ℃, and the response sensitivity for formaldehyde gas with the concentration of 10ppm is 30.9.
The embodiments described above are described to facilitate an understanding and appreciation of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications to the present invention based on the disclosure of the present invention within the protection scope of the present invention.
Claims (5)
1. A preparation method of graphene-loaded tin dioxide quantum dots for formaldehyde and nitrogen dioxide gas detection is characterized in that SnO is utilized2In the preparation process of the quantum dot modified graphene, a precursor adopts tin salt and zinc salt, and is mixed with graphene oxide for hydrothermal reaction, and then, the step of acid washing is adopted to remove Zn in the product, so that the surface and the inside of the metal oxide have more defect states, and the existence of the defect states can improve the adsorption of the material to target gas and preferentially catalyze the reaction, and the preparation method comprises the following steps:
the method comprises the following steps: weighing 2-5 mmol of tin salt and 0.1-0.5 mmol of zinc salt in 10mL of deionized water, and dissolving in the deionized water;
step two: taking 10mL of deionized water, preparing an aqueous solution of a triblock polymer with the molar concentration of 0.8-1.2M, slowly dropping the solution obtained in the step one into the aqueous solution of the triblock polymer under the stirring state, continuously stirring for 30-50 min, adding 1-3 mL of hydrochloric acid, and continuously stirring for 30-50 min;
step three: adding 5-10 mL of graphene oxide with the concentration of 1mg/mL into the solution obtained in the second step, stirring for 1-2 h, carrying out hydrothermal reaction at 180-200 ℃, cooling to room temperature, centrifuging, collecting precipitate, and drying at 60-80 ℃ to obtain powder;
step four: will step withPutting the powder obtained in the third step into a nitric acid aqueous solution with the concentration of 1-2M, and carrying out hydrothermal reaction at 160-180 ℃ for 12-14 h to obtain graphene-loaded SnO2And (4) quantum dots.
2. The method for preparing graphene-supported tin dioxide quantum dots for formaldehyde and nitrogen dioxide gas detection according to claim 1, wherein the method comprises the following steps: in the step one, the tin salt is SnCl4·5H2O，SnCl2·2H2O，Sn(Ac)2At least one of; the zinc salt is Zn (NO)3)2·6H2O，Zn(AC)2，ZnCl2，ZnSO4At least one of (1).
3. The method for preparing graphene-supported tin dioxide quantum dots for formaldehyde and nitrogen dioxide gas detection according to claim 1, wherein the method comprises the following steps: in the second step, the triblock polymer is at least one of P123 or F127.
4. A graphene-supported tin dioxide quantum dot for detecting formaldehyde and nitrogen dioxide gases, which is characterized by being prepared according to any one of the methods of claims 1-3.
5. The application of the graphene-supported tin dioxide quantum dot according to claim 4 in formaldehyde and nitrogen dioxide gas detection.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437320A (en) * | 2011-11-21 | 2012-05-02 | 北京师范大学 | Graphene-coated mesoporous metallic oxide, and preparation method and use thereof |
| CN103364453A (en) * | 2013-06-28 | 2013-10-23 | 上海纳米技术及应用国家工程研究中心有限公司 | Tin oxide-zinc oxide composite hollow microsphere air-sensitive sensing device and preparation method thereof |
| CN103566843A (en) * | 2012-07-24 | 2014-02-12 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method for zinc oxide/stannic oxide composite microsphere |
| CN105253876A (en) * | 2015-11-07 | 2016-01-20 | 合肥国轩高科动力能源有限公司 | Method for preparing high-dispersion nitrogen-doped graphene |
| US20170016867A1 (en) * | 2015-07-13 | 2017-01-19 | University Of Ulsan Foundation For Industry Cooperation | Flexible nitrogen dioxide gas sensor based on tungsten trioxide nanoparticles coated carbon nanotubes-graphene oxide hybrid and method for manufacturing the same |
| CN107946084A (en) * | 2017-10-26 | 2018-04-20 | 广东工业大学 | A kind of metal oxide/three-dimensional porous graphene composite material and its preparation method and application |
| CN108358215A (en) * | 2018-03-14 | 2018-08-03 | 武汉理工大学 | A kind of preparation method of phenyl modified mesoporous SBA-15 template |
| CN108828026A (en) * | 2018-06-25 | 2018-11-16 | 哈尔滨工业大学 | A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature |
| CN109115841A (en) * | 2018-08-13 | 2019-01-01 | 江苏大学 | A kind of graphene oxide cladding tin oxide quantum dot gas sensitive and preparation method thereof |
| CN109659541A (en) * | 2018-12-21 | 2019-04-19 | 上海纳米技术及应用国家工程研究中心有限公司 | Negative electrode material silica-base material/polyaniline/graphene preparation method and products thereof and application |
| KR20190092046A (en) * | 2018-01-30 | 2019-08-07 | 연세대학교 산학협력단 | Zinc oxide quantumdot based gas detecting sensor and method for manufacturing the same and gas detecting system comprising the same |
| CN111056566A (en) * | 2019-12-20 | 2020-04-24 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of tin dioxide nano material, product and application thereof |
| AU2020102360A4 (en) * | 2019-12-30 | 2020-11-05 | Harbin Institute Of Technology, Shenzhen | Preparation method of functionalized graphene with gas sensitivity and gas-sensitive ink |
-
2020
- 2020-12-01 CN CN202011381411.1A patent/CN112611786B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437320A (en) * | 2011-11-21 | 2012-05-02 | 北京师范大学 | Graphene-coated mesoporous metallic oxide, and preparation method and use thereof |
| CN103566843A (en) * | 2012-07-24 | 2014-02-12 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method for zinc oxide/stannic oxide composite microsphere |
| CN103364453A (en) * | 2013-06-28 | 2013-10-23 | 上海纳米技术及应用国家工程研究中心有限公司 | Tin oxide-zinc oxide composite hollow microsphere air-sensitive sensing device and preparation method thereof |
| US20170016867A1 (en) * | 2015-07-13 | 2017-01-19 | University Of Ulsan Foundation For Industry Cooperation | Flexible nitrogen dioxide gas sensor based on tungsten trioxide nanoparticles coated carbon nanotubes-graphene oxide hybrid and method for manufacturing the same |
| CN105253876A (en) * | 2015-11-07 | 2016-01-20 | 合肥国轩高科动力能源有限公司 | Method for preparing high-dispersion nitrogen-doped graphene |
| CN107946084A (en) * | 2017-10-26 | 2018-04-20 | 广东工业大学 | A kind of metal oxide/three-dimensional porous graphene composite material and its preparation method and application |
| KR20190092046A (en) * | 2018-01-30 | 2019-08-07 | 연세대학교 산학협력단 | Zinc oxide quantumdot based gas detecting sensor and method for manufacturing the same and gas detecting system comprising the same |
| CN108358215A (en) * | 2018-03-14 | 2018-08-03 | 武汉理工大学 | A kind of preparation method of phenyl modified mesoporous SBA-15 template |
| CN108828026A (en) * | 2018-06-25 | 2018-11-16 | 哈尔滨工业大学 | A kind of preparation method of the highly sensitive detection nitrogen dioxide gas sensor of room temperature |
| CN109115841A (en) * | 2018-08-13 | 2019-01-01 | 江苏大学 | A kind of graphene oxide cladding tin oxide quantum dot gas sensitive and preparation method thereof |
| CN109659541A (en) * | 2018-12-21 | 2019-04-19 | 上海纳米技术及应用国家工程研究中心有限公司 | Negative electrode material silica-base material/polyaniline/graphene preparation method and products thereof and application |
| CN111056566A (en) * | 2019-12-20 | 2020-04-24 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of tin dioxide nano material, product and application thereof |
| AU2020102360A4 (en) * | 2019-12-30 | 2020-11-05 | Harbin Institute Of Technology, Shenzhen | Preparation method of functionalized graphene with gas sensitivity and gas-sensitive ink |
Non-Patent Citations (6)
| Title |
|---|
| LI LEI: "Three-dimensional mesoporous graphene aerogel-supported SnO2 nanocrystals for high-performance NO2 gas sensing at low temperature", 《ANALYTICAL CHEMISTRY》 * |
| XUQIANG HAO: "Zn-vacancy mediated electron-hole separation in ZnS/g-C 3 N 4 heterojunction for efficient visible-light photocatalytic hydrogen production" * |
| 刘剑桥: "新型量子点气体传感器测试***的设计" * |
| 叶鹏飞: "SnO2量子点/石墨烯复合结构的合成及其光催化性能研究", 《物理学报》 * |
| 徐爽: "二氧化锡基纳米材料的制备及气敏性能研究", 《工程科技Ⅰ辑》 * |
| 葛美英: "选择性甲醛气敏传感器的制备及应用", 《信息科技》 * |
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