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CN107297213A - A kind of method for preparing quaternary sulfide quantum dots photochemical catalyst - Google Patents

A kind of method for preparing quaternary sulfide quantum dots photochemical catalyst Download PDF

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Publication number
CN107297213A
CN107297213A CN201710395913.1A CN201710395913A CN107297213A CN 107297213 A CN107297213 A CN 107297213A CN 201710395913 A CN201710395913 A CN 201710395913A CN 107297213 A CN107297213 A CN 107297213A
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China
Prior art keywords
photochemical catalyst
copper
quantum dots
catalyst
preparing quaternary
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CN201710395913.1A
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Inventor
邵荣
谭丽丽
毛宝东
宫关
王勃
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Jiangsu University
Yangcheng Institute of Technology
Yancheng Institute of Technology
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Jiangsu University
Yangcheng Institute of Technology
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    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
    • 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
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/04Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
    • C01B3/042Decomposition of water
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Catalysts (AREA)

Abstract

The present invention relates to metal of alloying sulfide, refer in particular to a kind of method for preparing quaternary sulfide quantum dots photochemical catalyst, with copper acetate, zinc acetate, indium nitrate, thioacetamide is the method that raw material prepares I III VI race CuInZnS quantum dot light catalyst, and its preparation technology is simple, and product is the photochemical catalyst with good visible light catalysis activity.The valence band of the quantum dot system is made up of the 2p tracks of sulphur and the 3d tracks of copper, by regulating and controlling amount of copper, to influence the band gap of material, i.e. to the absorbability of light, copper defect effect is reduced with co-catalyst Pt simultaneously, greatly promote the separation and transfer in nanocrystalline photoexcited electron hole, optimization production hydrogen activity.

Description

A kind of method for preparing quaternary sulfide quantum dots photochemical catalyst
Technical field
The present invention relates to metal of alloying sulfide, refers in particular to one kind with copper acetate, zinc acetate, indium nitrate, thioacetamide The method that I-III-VI race CuInZnS quantum dot light catalyst is prepared for raw material, its preparation technology is simple, and product is that have well The photochemical catalyst of visible light catalysis activity.
Background technology
At present, light hydrogen production by water decomposition technology can realize that substantial amounts of solar energy is changed to chemical energy, be energy conversion Good mode, and the Hydrogen Energy prepared, are a kind of clean energy resourcies of sustainable high fuel value, can solve simultaneously increasingly Severe environmental problem and problem of energy crisis.The key of the high activity of photochemical catalyzing is the band structure of catalyst, right The absorbability of light and the separation of photogenerated charge and transfer.Therefore photochemical catalyst of the research with high catalytic activity is to decomposition water With vital influence.
Compared to body phase material, Colloidal Quantum Dots can regulate and control band gap by component, so as to influence the absorption model to light Enclose and intensity, quantum size effect causes quantum dot to have specific surface area big, and surface dangling bonds are more so that photocatalytic activity site It is many, the short extensive concern for waiting unique optical characteristics to cause researcher of distance that photo-generated carrier spreads to catalytic surface.Newly I-III-VI without Cd2Race ternary chalcogenide thing (I=Cu, Ag;III=Ga, In;VI=S, Se) such as CuInS2、 CuInSe2、CuGaS2、AgInS2And AgGaS2Nano material is direct band gap material and the quantum dot of environmental protection, with larger The excellent property such as Stokes shift, longer fluorescence lifetime by numerous studies.ZnS is incorporated into by the research such as Tsuji CuInS2Mischcrystal photocatalyst (Cu In) is formed in crystalxZn2(1-x)S2, by the regulation of component, obtain 1.75eV- The photochemical catalyst of 2.67eV bandgap ranges, Zn introducing causes the light abstraction width of material greatly to increase, and is effectively improved The utilization ratio of solar energy.Typically by broad-band gap ZnS (Eg=2.5eV) and narrow band gap AgInS2(Eg=1.8eV) synthesize (Ag In)xZn2(1-2x)S2Photochemical catalyst, and control ZnS and AgInS2Ratio can adjust (Ag In)xZn2(1-2x)S2 Energy gap, with very high photocatalysis hydrogen production efficiency.(the Ag In) of 3wt%Pt loads0.22Znl.56S2At 420nm The sub- efficiency of hydrogen output reaches 20%.The research such as Zhijun Ning applies the AgInZnS of zero dimension in different solutions pH value, catalysis Photocatalyzed Hydrogen Production situation under the concentration of agent, the concentration of sacrifice agent and the production hydrogen condition of cocatalyst concentration, optimizes light point Xie Shui condition.However, regulation and control of the application study also not on CuInZnS quantum dot component copper influence on Photocatalyzed Hydrogen Production.
The content of the invention
It is an object of the present invention to provide one kind with zinc acetate, copper acetate, indium nitrate, thioacetamide, Cys, hydrogen-oxygen Change sodium to be raw material to synthesize the hydro-thermal being simply easily controlled of the quantum dot light catalyst with good visible photocatalysis water activity Method.
The present invention is realized by following steps:
(1) the Cys aqueous solution is added in copper acetate, indium nitrate and zinc acetate mixed aqueous solution, then adjusts mixing The pH of liquid, adds sulphur source, stirring ultrasound, then mixed liquor is poured into water heating kettle, is placed in 110 DEG C of baking ovens and reacts 4 hours.Use water Precipitation is washed with ethanol, obtained CuInZnS quantum dot light catalyst is stored in water, and controls the accounting of copper acetate, Cu/ In/Zn mol ratios are 0.05/10/5-2.5/10/5, and CIZS-0.05-CIZS-2.5 are designated as respectively.Optimal mole of photocatalysis performance Than for 1/10/5, i.e. CIZS-1.
The pH value of the regulation mixed liquor refers to:Use concentration for 1 mole every liter sodium hydroxide adjust mixed liquor pH be 8.5。
The mole of thioacetamide and Cys is fixed as 2.4 and 3.7 mMs in building-up process.
(2) the CuInZnS quantum dot light catalyst prepared by the present invention, size is 3-5 nanometers, in aqueous in clarification Transparent solution, and the accounting containing different Cu sample under same concentrations solution colour fade to red from glassy yellow.
(3) instrument such as X-ray diffractometer (XRD), Flied emission 300kV high-resolution-ration transmission electric-lens, ultraviolet specrophotometer are utilized Device carries out structural analysis to product, is catalytically decomposed using vulcanized sodium and sodium sulfite as sacrifice agent and platinum as co-catalyst Water, its photocatalysis performance is assessed with photochemical catalyzing analysis system.
The present invention relates to quaternary CuInZnS is nanocrystalline, CuInZnS is nanocrystalline to can be by component regulation and control bandgap structure Visible light-responded n-type quaternary semiconductor, size is small, and specific surface area is larger, and such avtive spot is more, extremely beneficial to photocatalysis Produce hydrogen, and narrower charge migration distance so that electron hole pair quickly can be migrated and separated.The quantum dot system Valence band is made up of the 2p tracks of sulphur and the 3d tracks of copper, by regulating and controlling amount of copper, to influence the band gap of material, improves the absorption to light Ability, while reduce copper defect effect with co-catalyst Pt, greatly promote nanocrystalline photoexcited electron hole separation and Transfer, optimization production hydrogen activity.
Brief description of the drawings
Fig. 1 is the XRD diffraction spectrograms of prepared CuInZnS quantum dot light catalyst;
Fig. 2 is the transmission plot and high-resolution transmission plot of prepared CuInZnS quantum dot light catalyst;
Fig. 3 is the solid UV absorption figure of prepared CuInZnS quantum dot light catalyst;
Fig. 4 is the Photocatalyzed Hydrogen Production performance map of prepared CuInZnS quantum dot light catalyst.
Embodiment
The preparation of embodiment 1CuInZnS quantum dot light catalyst
Weigh copper acetate, 0.139 gram of zinc acetate, 0.4867 gram of indium nitrate, mixing is dissolved in 4.125 milliliters of water, here for The CuInZnS photochemical catalysts of the different accounting amount of copper of synthesis, are separately added into different amounts of copper acetate 0.0127g-0.0635g (CIZS-0.05-CIZS-2.5), 0.4537 gram of Cys aqueous solution is added after uniform mixing.Again with 1 mole of every liter of concentration Sodium hydroxide regulation pH be 8.5, add 0.183 gram of thioacetyl amine aqueous solution, ultrasonic mixing is uniform, hydro-thermal in 110 DEG C of baking ovens Reaction 4 hours, is cooled to room temperature.During washing centrifugation, first adding a small amount of water dissolves it, is adding ethanol precipitation to centrifuge, so Repeat two to three times.Finally by the preservation soluble in water of obtained CuInZnS quantum, it is easy to the test point of later structure and performance Analysis.
The phenetic analysis of embodiment 2CuInZnS quantum dot light catalyst
As shown in figure 1, as can be seen from the figure with the increase of copper content, the diffraction of CuInZnS quantum dot light catalyst Main peak type does not change substantially, but main peak is moved slightly towards big wave number, can be due to that copper is further acted on quantum dot As a result.
As shown in Fig. 2 it can be seen that we are successfully prepared out the quantum dot of 3-5 nanosizeds, and between lattice Away from 0.31 nanometer it is corresponding be chalcopyrite CuInZnS quantum dots (112) crystal face.
As shown in figure 3, as can be seen from the figure with the increase of copper content, the increasing of red shift, i.e. amount of copper occurs for the absorption of light Plus the band gap of quantum dot is reduced, add the absorption to light.
As shown in figure 4, as can be seen from the figure with the increase of copper content, the increase of photocatalysis Decomposition aquatic products hydrogen activity is said Bright copper has the reduction to be probably due to the appearance of copper defect production hydrogen activity important, rear activity so that light induced electron is multiple Conjunction center increases.
The visible light catalysis activity experiment of embodiment 3CuInZnS quantum dot light catalyst
(1) platinum acid chloride solution for weighing 100 milligrams of CuInZnS quantum dot lights catalyst and 2wt% is placed in photocatalysis hydrogen production In reactor, add 100 milliliters of water and appropriate sacrifice agent is ultrasonic 15 minutes.
(2) amount of the hydrogen of generation is measured with gas-chromatography within every 1 hour.
(3) the high visible light catalysis activity of prepared photochemical catalyst, especially CIZS-1 sample as seen from Figure 4, it is living Property than CIZS-0.05 production hydrogen it is high about 11 times.

Claims (4)

1. a kind of method for preparing quaternary sulfide quantum dots photochemical catalyst, it is characterised in that:The Cys aqueous solution is added Enter in copper acetate, indium nitrate and zinc acetate mixed aqueous solution, then adjust the pH of mixed liquor, add sulphur source, stirring ultrasound, then will mix Close liquid to pour into water heating kettle, be placed in 110 DEG C of baking ovens and react 4 hours, wash precipitation with water and ethanol, obtained CuInZnS quantum Point photochemical catalyst is stored in water, controls the accounting of copper acetate, and Cu/In/Zn mol ratios are 0.05/10/5-2.5/10/5, are passed through Regulate and control amount of copper, to influence the band gap of material, improve the absorbability to light.
2. a kind of method for preparing quaternary sulfide quantum dots photochemical catalyst as claimed in claim 1, it is characterised in that:Cu/ In/Zn mol ratios are 1/10/5.
3. a kind of method for preparing quaternary sulfide quantum dots photochemical catalyst as claimed in claim 1, it is characterised in that described The pH value of regulation mixed liquor refers to:It is 8.5 for the pH value that 1 mole every liter of sodium hydroxide adjusts mixed liquor to use concentration.
4. a kind of method for preparing quaternary sulfide quantum dots photochemical catalyst as claimed in claim 1, it is characterised in that:Synthesis During the moles of thioacetamide and Cys be fixed as 2.4 and 3.7 mMs.
CN201710395913.1A 2017-05-31 2017-05-31 A kind of method for preparing quaternary sulfide quantum dots photochemical catalyst Pending CN107297213A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108276987A (en) * 2018-01-30 2018-07-13 吉林大学 A kind of preparation and its application of the reinforced electric chemiluminescent agent based on CuInZnS/ZnS quantum dots
CN110124697A (en) * 2019-04-12 2019-08-16 江苏大学 A kind of 0D/2D composite photocatalyst material and preparation method and purposes
CN110354903A (en) * 2019-08-29 2019-10-22 南昌航空大学 A kind of preparation method of photocatalysis Decomposition aquatic products hydrogen material
CN111285396A (en) * 2020-03-16 2020-06-16 常州大学 Preparation method of Cu-In-Zn-S nanosphere and application of nanosphere In photoresponse detector
WO2021135089A1 (en) * 2019-12-31 2021-07-08 肇庆市华师大光电产业研究院 Cu2znbi2s3 nano-rod and use thereof
CN113893839A (en) * 2021-11-11 2022-01-07 周口师范学院 Preparation method of photocatalytic material for indoor air purification
CN114042446A (en) * 2021-12-23 2022-02-15 江苏大学 Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot composite photocatalyst
CN115337949A (en) * 2022-08-01 2022-11-15 云南大学 Heterojunction composite material, preparation method thereof and application of heterojunction composite material as photocatalyst
CN115532284A (en) * 2022-10-14 2022-12-30 东莞理工学院 Multi-element sulfide heterojunction microsphere, preparation method and application thereof, and photocatalytic hydrogen production method
WO2023108948A1 (en) * 2021-12-17 2023-06-22 公元股份有限公司 Preparation method for cu2s/cuins2/znin2s4 composite photocatalyst and use thereof

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CN105950140A (en) * 2016-04-28 2016-09-21 江苏大学 Method for preparing Ag:ZnIn2S4 luminescent quantum dots and photocatalyst

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108276987A (en) * 2018-01-30 2018-07-13 吉林大学 A kind of preparation and its application of the reinforced electric chemiluminescent agent based on CuInZnS/ZnS quantum dots
CN108276987B (en) * 2018-01-30 2020-04-28 吉林大学 Preparation and application of enhanced electrochemical luminescent agent based on CuInZnS/ZnS quantum dots
CN110124697A (en) * 2019-04-12 2019-08-16 江苏大学 A kind of 0D/2D composite photocatalyst material and preparation method and purposes
CN110354903A (en) * 2019-08-29 2019-10-22 南昌航空大学 A kind of preparation method of photocatalysis Decomposition aquatic products hydrogen material
WO2021135089A1 (en) * 2019-12-31 2021-07-08 肇庆市华师大光电产业研究院 Cu2znbi2s3 nano-rod and use thereof
CN111285396A (en) * 2020-03-16 2020-06-16 常州大学 Preparation method of Cu-In-Zn-S nanosphere and application of nanosphere In photoresponse detector
CN113893839A (en) * 2021-11-11 2022-01-07 周口师范学院 Preparation method of photocatalytic material for indoor air purification
CN113893839B (en) * 2021-11-11 2024-02-09 周口师范学院 Preparation method of photocatalytic material for purifying indoor air
WO2023108948A1 (en) * 2021-12-17 2023-06-22 公元股份有限公司 Preparation method for cu2s/cuins2/znin2s4 composite photocatalyst and use thereof
CN114042446A (en) * 2021-12-23 2022-02-15 江苏大学 Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified CIZS quantum dot composite photocatalyst
CN114042446B (en) * 2021-12-23 2022-11-18 江苏大学 Preparation method and application of phthalocyanine-derived functional carbon quantum dot modified Cu-In-Zn-S quantum dot composite photocatalyst
CN115337949A (en) * 2022-08-01 2022-11-15 云南大学 Heterojunction composite material, preparation method thereof and application of heterojunction composite material as photocatalyst
CN115337949B (en) * 2022-08-01 2024-04-19 云南大学 Heterojunction composite material, preparation method thereof and application of heterojunction composite material as photocatalyst
CN115532284A (en) * 2022-10-14 2022-12-30 东莞理工学院 Multi-element sulfide heterojunction microsphere, preparation method and application thereof, and photocatalytic hydrogen production method

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