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Method for preparing narrow-bandgap In-rich type AgInS2 photocatalyst with visible-light response

A photocatalyst and narrow bandgap technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of narrow band gap, complex operation process, harsh preparation conditions, etc., and achieve band gap The effect of narrow width, easy operation, and short preparation time

Inactive Publication Date: 2016-04-13
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to aim at AgInS 2 With the disadvantages of harsh preparation conditions and complicated operation process, a low-temperature co-precipitation method is proposed to prepare narrow-bandgap indium-rich AgInS with visible light response. 2 photocatalytic method, this method prepared AgInS 2 The photocatalyst has stable chemical properties, narrow band gap, strong light absorption, controllable adjustment of spectral absorption range, good photocatalytic degradation of organic dye pollutants, and high regeneration ability

Method used

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  • Method for preparing narrow-bandgap In-rich type AgInS2 photocatalyst with visible-light response
  • Method for preparing narrow-bandgap In-rich type AgInS2 photocatalyst with visible-light response
  • Method for preparing narrow-bandgap In-rich type AgInS2 photocatalyst with visible-light response

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Add 0.6mmolAgNO 3 and 3mmolIn(NO 3 ) 3 Dissolved in 170mL ethanol, ultrasonically dissolved to form a transparent solution of the metal salt precursor.

[0027] (2) Dissolve 10mmol thioacetamide in 10mL ethanol and stir vigorously to form a precipitant. Add the precipitating agent solution dropwise into the above metal salt precursor solution under continuous stirring.

[0028] (3) Transfer the mixed solution to a 250mL three-necked flask, add a condensing reflux device, and stir at an appropriate speed, and the temperature of the water bath is 55 o C, the water bath time is 3 hours.

[0029] (4) After the reaction, age for several hours, discard the yellow supernatant, centrifuge the reddish-brown precipitate, wash with deionized water and absolute ethanol three times, and then wash at 60-100 o Dry at C for a certain period of time, cool naturally, and grind to obtain a narrow bandgap indium-rich AgInS with a controllable and adjustable spectral absorption ran...

Embodiment 2

[0031] (1) Add 0.6mmolAgNO 3 and 3mmolIn(NO 3 ) 3 Dissolved in 170mL ethylene glycol, ultrasonically dissolved to form a transparent solution of the metal salt precursor.

[0032] (2) Dissolve 10mmol thioacetamide in 10mL ethylene glycol and stir vigorously to form a precipitant. Add the precipitating agent solution dropwise into the above metal salt precursor solution under continuous stirring.

[0033] (3) Transfer the mixed solution to a 250mL three-necked flask, add a condensing reflux device, and stir at an appropriate speed, and the temperature of the water bath is 70 o C, the water bath time is 3 hours.

[0034] (4) After the reaction, age for several hours, discard the yellow supernatant, centrifuge the reddish-brown precipitate, wash with deionized water and absolute ethanol three times, and then wash at 60-100 o Dry at C for a certain period of time, cool naturally, and grind to obtain a narrow bandgap indium-rich AgInS with a controllable and adjustable spectra...

Embodiment 3

[0036] (1) Add 0.6mmol CH 3 COOAg and 3mmolIn 2 (SO 4 ) 3 Dissolve in 170mL propanol, ultrasonically dissolve to form a transparent solution of the metal salt precursor.

[0037](2) Dissolve 5mmol thioacetamide in 10mL propanol and stir vigorously to form a precipitant. Add the precipitating agent solution dropwise into the above metal salt precursor solution under continuous stirring.

[0038] (3) Transfer the mixed solution to a 250mL three-necked flask, add a condensing reflux device, and stir at an appropriate speed, and the temperature of the water bath is 95 o C, the water bath time is 3 hours.

[0039] (4) After the reaction, age for several hours, discard the yellow supernatant, centrifuge the reddish-brown precipitate, wash three times with deionized water and absolute ethanol, and then wash at 60-100 o Dry at C for a certain period of time, cool naturally, and grind to obtain a narrow bandgap indium-rich AgInS with a controllable and adjustable spectral absorpt...

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Abstract

The invention relates to a method for preparing a narrow-bandgap In-rich type AgInS2 photocatalyst with a visible-light response. The method comprises the following steps of fully dissolving silver salt and indium salt in a certain proportion in an organic alcohol solution to form a metal salt precursor; carrying out reaction on the metal salt precursor and an excessive sulfide (a sulfur source) under certain temperature through continuous stirring; enabling the sulfide to react with silver ions at first to form taupe silver sulfide, enabling the silver sulfide to react with the indium salt to generate phase variation with the prolongation of reaction time, and finally obtaining a bronzing solid product; washing and drying the bronzing solid product to obtain the narrow-bandgap In-rich type AgInS2 photocatalyst with a controllable and adjustable spectral absorption range and the visible-light response. The method disclosed by the invention has the outstanding advantages that preparation conditions are gentle, the yield is high, and the spectral absorption range of narrow-bandgap In-rich type AgInS2 is controllable and adjustable; the product, namelyAgInS2, has very high visible light catalyzation and mineralization property and higher regeneration ability.

Description

technical field [0001] The invention relates to a narrow bandgap indium-rich AgInS responsive to visible light 2 A method for preparing a photocatalyst, especially a low-temperature co-precipitation method for preparing narrow-bandgap indium-rich AgInS with controllable and adjustable spectral absorption range, visible light response and high catalytic mineralization ability 2 catalyst of light. Background technique [0002] Dyes enrich our lives, but the environmental problems caused by dye wastewater cannot be underestimated. Dye wastewater has large water volume, deep color, high content of organic pollutants, complex components, strong acidity and alkalinity, strong oxidation resistance, difficult biodegradation, high biological toxicity, and contains a variety of "three causes" (carcinogenic, carcinogenic teratogenic, mutagenic) properties of organic substances. The direct discharge of these dye wastewater will not only deteriorate the water quality and soil quality,...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/10C02F1/30C02F101/30
CPCC02F1/30B01J27/04C02F2101/308B01J35/39B01J35/613
Inventor 邓芳张燕卢晓英赵丽娜
Owner NANCHANG HANGKONG UNIVERSITY
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