CN108557869A - A kind of CdS nanometer piece preparation methods based on bacteria cellulose skeleton - Google Patents

A kind of CdS nanometer piece preparation methods based on bacteria cellulose skeleton Download PDF

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Publication number
CN108557869A
CN108557869A CN201810446345.8A CN201810446345A CN108557869A CN 108557869 A CN108557869 A CN 108557869A CN 201810446345 A CN201810446345 A CN 201810446345A CN 108557869 A CN108557869 A CN 108557869A
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bacteria cellulose
cds
preparation
bacteria
cds nanometer
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CN201810446345.8A
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周满
陈敬文
李忠玉
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Changzhou University
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Changzhou University
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G11/00Compounds of cadmium
    • C01G11/02Sulfides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/02Sulfur, selenium or tellurium; Compounds thereof
    • B01J27/04Sulfides
    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00Manufacture or treatment of nanostructures
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/70Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/20Particle morphology extending in two dimensions, e.g. plate-like

Abstract

The present invention relates to a kind of CdS nanometer piece preparation methods based on bacteria cellulose skeleton, including step:The pretreatment of bacteria cellulose, the preparation of CdS nanometer sheets.The beneficial effects of the invention are as follows:By simple ion exchange, CdS nanometer sheets have been prepared using the method for hydrothermal synthesis.The CdS so prepared has high activity for photocatalytic degradation.

Description

A kind of CdS nanometer piece preparation methods based on bacteria cellulose skeleton
Technical field
The invention belongs to nano material preparation and applied technical fields, are related to one kind using inorfil skeleton as support level The method that point prepares CdS nanosheet photocatalysts.
Background technology
Photocatalysis technology, which is increasingly becoming, curbs environmental pollution and one of the technology of most critical of energy shortage problem, and draws The extensive research of domestic and international scientist is sent out.Many research work concentrate on high efficiency photocatalyst search and it is appropriately designed on, Because directly carrying out drive response using solar radiation has proved to be a kind of science, the method effectively with green.
In the past few decades, the dimension of nano material and pattern control variation exponentially increase.With not similar shape The nano material of looks, such as nano particle, nanotube, nano wire, the potential system as scientific research and commercial Application become It is more and more important.Wherein, two-dimension nano materials such as graphene and transition metal oxide causes broad interest.These two-dimensional nanos Material is characterized in that its nano level thickness and sub-micron to micron-sized lateral dimension, to have excellent anisotropy Property and high-specific surface area, this is very important various applications.In addition, for the plural layers weight with pore characteristics New accumulation, two-dimensional nano piece show huge potentiality, can assign new or enhancing property.For example, catalyzed HTiNbO5Nanometer sheet and SnO2Nano particle/graphite alkene nanometer sheet can be used as the electrode material of lithium battery.
However, from the perspective of Science and Technology importance, do not have the material (such as ZnO and CdS) of layer structure It is still a challenge to prepare two-dimensional nano piece.Some typical synthetic methods include liquid-liquid interface growth, object so far Reason/chemical vapor deposition, the stripping of ultrasonic wave added liquid phase etc. have been developed that.For example, by the thermal evaporation of ZnS powder, Ma Et al. observe that various ZnS nanostructures include nanometer sheet, the formation of the nanostructures such as nanobelt.By evaporating and aoxidizing GaN Powder prepares Ga2O3Nanometer sheet and nanobelt.The multilayer ZnO with micron lateral dimension is prepared by thermal evaporation metallic zinc powder Thin slice.However, these are irregular by the nanometer sheet normally shape and size of gas-phase deposition acquisition;In addition, to being at present Only not clear atom or ion are rationally assembled into two-dimensional sheet nanostructure rather than other stable forms (such as particle) Mechanism.Therefore enabling people to prepare, there is the synthetic method of the nano material of predictable form and dimension to be obviously important.
Bacteria cellulose is the large biological molecule by self assembly and nothing with the organized substance of multiple-length layer of structure Machine nano-particle assembles.The material has supporting structure and hierarchical porosity, is the biology that can be used for preparing CdS nanometer sheets Nanocomposite.It is realized by template mineralising and double ion exchange and seed growth.This experiment makes in ethanol solution With caddy and thiocarbamide respectively as Cd2+And S2-The CdS nanometer sheets of precursor, optimization show good degradation property.Biology is received Nano composite material foam has flexibility, globality and level porosity, it can be achieved that easily separating catalyst, rapid molecular transport With high reaction surface area, it is very suitable for the extensive use from catalyst to the energy.Petroleum derivation is replaced to polymerize with large biological molecule Object has shown the sustainability of advanced nanocomposite developing direction.Current work provides a kind of multipurpose and sustainable Strategy, for produce have " scaffold " structure, grade porosity, numerous compositions Biocomposite material foam.Therefore, It is especially interesting to study this nano material from one-dimensional to two-dimensional.
Invention content
The technical problem to be solved by the present invention is to:Based on the above issues, the present invention is provided using bacteria cellulose as support The method that site prepares CdS nanosheet photocatalysts, includes the following steps:
(1) bacteria cellulose is handled:Bacteria cellulose aquagel by Guilin Qi Hong Science and Technology Ltd.s provide, and to its into Row reprocessing.Bacteria cellulose aquagel is purified in NaOH aqueous solutions, removes the bacterium in striping and Residual reactants, then It is washed to pH=7.0 using deionized water.Bacteria cellulose after washing is cut into small pieces and is immersed into liquid nitrogen, it is dry to carry out freezing It is dry, obtain the bacteria cellulose aeroge with layered structure.
(2) preparation of CdS nanometer sheets:0.1M sodium citrates, certain density CdCl are added in the ethanol solution of 100ml2, It is put into 50mg bacteria celluloses.Ultrasonic 10min makes cadmium salt uniform settlement on cellulose, and it is dense that 0.7ml is then added into solution Ammonium hydroxide, 0.2M thiocarbamides.Solution is sealed in autoclave, and is heated in an oven, obtained sample with ethanol cleans several times, clearly It is then dry under vacuum (80 DEG C, 12h) except unsupported CdS up.
Further, the concentration of NaOH solution is 1M in the step (1), and temperature is 90 DEG C.;
Further, the time being freeze-dried in the step (1) is 12h~48h.;
Further, CdCl in the step (2)2Concentration is 0.025M respectively.;
Further, oven temperature is 150 DEG C in the step (2), time 48h.
The application of CdS nanosheet photocatalysts, be used for photocatalytic degradation methylenum careuleum (MB) solution, as steps described below into Row:
It weighs 30mg catalyst to be put into test tube, 50mL 25mg/L MB solution is added, use 500W mercury lamps as light source, into Row photocatalytic degradation reacts.Dark reaction time is 40min, after illumination, time sample is taken per 10min, is centrifuged, and then survey its extinction Degree.
The beneficial effects of the invention are as follows:The preparation method is relatively simple, and preparation condition is easy to control, prepared photocatalysis Agent uses the biological material of abundance, and prepares nano-scale two-dimensional sheet using the one-dimentional structure of fiber itself CdS.The catalyst has many advantages, such as pollution-free, high catalytic efficiency, has certain application value.
Description of the drawings
The following further describes the present invention with reference to the drawings.
Fig. 1 is the bacteria cellulose scanning electron microscope (SEM) photograph that the embodiment of the present invention 1 is prepared;
Fig. 2 is the scanning electron microscope (SEM) photograph for the CdS nanometer sheet catalyst that the embodiment of the present invention 1 is prepared;
Fig. 3 is the X-ray diffractogram for the CdS nanometer sheet catalyst that the embodiment of the present invention 1 is prepared;
Fig. 4 is the concentration of the light degradation methylenum careuleum for the CdS nanometer sheet catalyst that the embodiment of the present invention 1 is prepared with illumination (1~5 corresponds to the CdCl of 0.0125M, 0.025M, 0.05M, 0.1M, 0.2M to time variation diagram respectively2)。
Specific implementation mode
Presently in connection with specific embodiment, the invention will be further described, following embodiment be intended to illustrate invention rather than Limitation of the invention further.
Embodiment 1
(1) bacteria cellulose is handled:Bacteria cellulose aquagel by Guilin Qi Hong Science and Technology Ltd.s provide, and to its into Row reprocessing.Bacteria cellulose aquagel is purified in NaOH aqueous solutions, removes the bacterium in striping and Residual reactants, then It is washed to pH=7.0 using deionized water.Bacteria cellulose after washing is cut into small pieces and is immersed into liquid nitrogen, it is dry to carry out freezing It is dry, obtain the bacteria cellulose aeroge with layered structure.;
(2) preparation of CdS nanometer sheets:0.1M sodium citrates, certain density CdCl are added in the ethanol solution of 100ml2, It is put into 50mg bacteria celluloses.Ultrasonic 10min makes cadmium salt uniform settlement on cellulose, and it is dense that 0.7ml is then added into solution Ammonium hydroxide, 0.2M thiocarbamides.Solution is sealed in autoclave, and is heated in an oven, obtained sample with ethanol cleans several times, clearly It is then dry under vacuum (80 DEG C, 12h) except unsupported CdS up.;
As Fig. 1,2 surface sweeping electron microscope shown in, present embodiment prepare CdS nanosheet photocatalysts pattern be fiber CdS nanometer sheets are grown between skeleton, and are distributed more uniform.
CdS Nano lamellites phase structure prepared by embodiment 1 is by Rigaku D/max 2500PC rotation X-ray diffractions Instrument is analyzed, wherein X-ray is Cu targetsVoltage 40kV, electric current 100mA, step-length are 0.02 °, are swept Retouch 5 °~80 ° of range.X ray diffracting spectrum is as shown in figure 3, as the characteristic peak of the increase bacteria cellulose of CdS amounts gradually subtracts Weak, the characteristic peak of CdS gradually increases, therefore can also show that degradation effect is not to become strong with the increase of load capacity.
Such as figure four is later discovered that the CdCl of a concentration of 0.025M by ratio modulation2Degradation effect is best.And without load Bacteria cellulose adsorption effect than more preferably, being the sample without load because in the catalysis for weighing equal quality after load Bacterial fibers cellulose content highest in product, exposed adsorption site is most, so adsorbance bigger.But it does not degrade after turning on light Effect, this load for also having confirmed CdS nanometer sheets have preferable photocatalytic activity.
(3) using the CdS nanometer sheets prepared in embodiment 1 as photocatalyst for degrading methylene blue solution, wherein methylenum careuleum is molten A concentration of 25mg/L of liquid takes CdS nanometer sheet catalyst 30mg, first dark reaction 40min that solution is made to reach adsorption-desorption and balances, then into Row ultraviolet catalytic reacts, and using 500W mercury lamps as light source, 3ml reaction solutions are extracted in centrifuge tube every 10min droppers, Be put into supercentrifuge centrifuge 3min after, after with ultraviolet specrophotometer measure photocatalysis effect.

Claims (5)

1. a kind of CdS nanometer piece preparation methods based on bacteria cellulose skeleton, which is characterized in that include the following steps:
(1) bacteria cellulose is handled:Bacteria cellulose aquagel is provided by Guilin Qi Hong Science and Technology Ltd.s, and is carried out again to it Processing.Bacteria cellulose aquagel is purified in NaOH aqueous solutions, the bacterium in striping and Residual reactants is removed, then uses Deionized water is washed to pH=7.0.Bacteria cellulose after washing is cut into small pieces and is immersed into liquid nitrogen, is freeze-dried, Obtain the bacteria cellulose aeroge with layered structure.;
(2) preparation of CdS nanometer sheets:0.1M sodium citrates, certain density CdCl are added in the ethanol solution of 100ml2, it is put into 50mg bacteria celluloses.Ultrasonic 10min makes cadmium salt uniform settlement on cellulose, and the dense ammonia of 0.7ml is then added into solution Water, 0.2M thiocarbamides.Solution is sealed in autoclave, and is heated in an oven, obtained sample with ethanol cleaning several times, is removed Unsupported CdS up is then dry under vacuum (80 DEG C, 12h).
2. the synthetic method of bacteria cellulose according to claim 1, it is characterized in that:NaOH is molten in the step (1) The concentration of liquid is 1M, and temperature is 90 DEG C.
3. the synthetic method of bacteria cellulose according to claim 1, it is characterized in that:Freezing is dry in the step (1) The dry time is 12h~48h.
4. the preparation method of CdS nanosheet photocatalysts according to claim 1, it is characterized in that:In the step (2) CdCl2Concentration is 0.025M respectively.
5. the preparation method of CdS nanosheet photocatalysts according to claim 1, it is characterized in that:In the step (2) Oven temperature is 150 DEG C, time 48h.
CN201810446345.8A 2018-05-11 2018-05-11 A kind of CdS nanometer piece preparation methods based on bacteria cellulose skeleton Pending CN108557869A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109999835A (en) * 2019-03-27 2019-07-12 武汉理工大学 A kind of carbonization bacteria cellulose-cadmium sulfide composite photocatalyst material and its preparation method and application
CN110808361A (en) * 2019-10-09 2020-02-18 天津大学 Method for preparing lithium-sulfur battery cathode material based on bacterial cellulose
CN112768655A (en) * 2021-01-11 2021-05-07 上海应用技术大学 Preparation method of tin dioxide @ oxidized bacterial cellulose/reduced graphene oxide electrode material
CN113663655A (en) * 2021-08-10 2021-11-19 常州大学 Preparation method of high-elasticity PDMS/CBC sponge adsorbing material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PEIPEI WANG ET AL.: ""ZnxCd1-xS/bacterial cellulose bionanocomposite foams with hierarchical architecture and enhanced visible-light photocatalytic hydrogen production", 《JOURNAL OF MATERIALS CHEMISTRY A》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109999835A (en) * 2019-03-27 2019-07-12 武汉理工大学 A kind of carbonization bacteria cellulose-cadmium sulfide composite photocatalyst material and its preparation method and application
CN109999835B (en) * 2019-03-27 2022-05-10 武汉理工大学 Carbonized bacterial cellulose-cadmium sulfide composite photocatalytic material and preparation method and application thereof
CN110808361A (en) * 2019-10-09 2020-02-18 天津大学 Method for preparing lithium-sulfur battery cathode material based on bacterial cellulose
CN112768655A (en) * 2021-01-11 2021-05-07 上海应用技术大学 Preparation method of tin dioxide @ oxidized bacterial cellulose/reduced graphene oxide electrode material
CN113663655A (en) * 2021-08-10 2021-11-19 常州大学 Preparation method of high-elasticity PDMS/CBC sponge adsorbing material

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Application publication date: 20180921