Preparation method of silver sulfide/silver phosphate/graphene oxide composite photocatalyst

A graphene composite and photocatalyst technology, which is applied in the field of photocatalytic materials, can solve the problems of low degradation rate and poor stability of composite photocatalysts, and achieve the effects of improving separation, improving photocatalytic degradation performance, and reducing solubility

Pending Publication Date: 2020-01-17
CHANGCHUN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But according to Ag 3 PO 4 Further investigation of composite photocatalysts revealed th

Method used

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  • Preparation method of silver sulfide/silver phosphate/graphene oxide composite photocatalyst
  • Preparation method of silver sulfide/silver phosphate/graphene oxide composite photocatalyst
  • Preparation method of silver sulfide/silver phosphate/graphene oxide composite photocatalyst

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[0021] Example 1:

[0022] According to the modified Hummers method to prepare graphene oxide (GO), disperse GO in deionized water and ultrasonically treat it for 3 hours to obtain GO suspension; weigh 3mmol silver nitrate and dissolve it in 8.5ml ethanol aqueous solution; then weigh 1mmol diphosphate Sodium hydrogen, dissolved in 8.5ml of ethanol aqueous solution; under stirring, add the nitric acid solution dropwise to the sodium dihydrogen phosphate solution, and continue to stir for 30 minutes; then add 1ml of 0.01 mol / L sodium sulfide solution dropwise to it. Stir for 4h under dark conditions; add 10ml graphene oxide suspension to the above solution, continue to stir for 3h, the obtained reactant is centrifuged, washed with deionized water and ethanol for 5 times, and dried under vacuum at 60℃ for 12h to obtain silver sulfide / Silver phosphate / graphene oxide composite photocatalyst.

Example Embodiment

[0023] Example 2:

[0024] Prepare graphene oxide (GO) according to the improved Hummers method. Disperse GO in deionized water and ultrasonically treat it for 3 hours to obtain GO suspension; weigh 4.2mmol silver nitrate and dissolve it in 8.5ml ethanol aqueous solution; then weigh 1.4mmol Sodium dihydrogen phosphate, dissolved in 8.5ml of ethanol aqueous solution; Under stirring conditions, add the nitric acid solution dropwise to the sodium dihydrogen phosphate solution, and continue to stir for 30 minutes; then add 1ml 0.01 mol / L sodium sulfide solution dropwise to it , Stirring in the dark for 4h; add 10ml of graphene oxide suspension to the above solution, continue to stir for 3h, the resulting reactant is centrifuged, washed with deionized water and ethanol for 5 times, and dried in vacuum at 60°C for 12h to obtain Silver sulfide / silver phosphate / graphene oxide composite photocatalyst.

Example Embodiment

[0025] Example 3:

[0026] Prepare graphene oxide (GO) according to the improved Hummers method. Disperse GO in deionized water and ultrasonically treat it for 3 hours to obtain GO suspension; weigh 8mmol silver nitrate and dissolve it in 8.5ml ethanol aqueous solution; then weigh 2.6mmol phosphoric acid Sodium dihydrogen, dissolved in 8.5ml of ethanol aqueous solution; Under stirring conditions, add the nitric acid solution dropwise to the sodium dihydrogen phosphate solution and continue to stir for 30 minutes; then add 1ml 0.01 mol / L sodium sulfide solution dropwise to it, Stir in the dark for 4 hours; add 10ml of graphene oxide suspension to the above solution, continue to stir for 3 hours, the resulting reactant is centrifuged, washed with deionized water and ethanol for 5 times, and dried in vacuum at 60°C for 12 hours to obtain a sulfide Silver / silver phosphate / graphene oxide composite photocatalyst.

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Abstract

The invention relates to a preparation method of a silver sulfide/silver phosphate/graphene oxide composite photocatalyst, and belongs to the field of photocatalytic materials. The preparation methodis characterized in that an ethanol aqueous solution is used as a solvent. The preparation method comprises following steps: under strong agitation, respectively preparing a silver nitrate solution and a sodium dihydrogen phosphate solution; preparing graphene oxide according to an improved Hummers method, carrying out ultrasonic treatment to obtain a graphene oxide suspension, sequentially addingthe silver nitrate solution, a sodium sulfide solution and the graphene oxide suspension into the sodium dihydrogen phosphate solution, and carrying out centrifugal drying to obtain the silver sulfide/silver phosphate/graphene oxide composite photocatalyst. The preparation process is simple, raw materials are cheap and easy to obtain, the preparation period is short, and the prepared material isstable in chemical property. The photocatalyst prepared by the invention has photocatalytic activity in a relatively wide wavelength range, can be used for photocatalytic degradation of organic pollutants under visible light or natural light radiation, and has a very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to the preparation and application of a silver sulfide / silver phosphate / graphene oxide composite photocatalyst. Background technique [0002] In recent decades, with the rapid economic development, environmental problems, especially water pollution, have become a severe challenge that people face. Semiconductor photocatalysis technology has become one of the most promising technologies to solve environmental problems because it can use sunlight to degrade various organic and inorganic pollutants. Among various semiconductor photocatalysts, silver-based semiconductor photocatalytic materials have been widely used in recent years, silver phosphate (Ag 3 PO 4 ), with a suitable band gap, has attracted considerable attention due to its high photocatalytic activity in the photocatalytic degradation of organic pollutants driven by visible light. [0003] Ho...

Claims

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Application Information

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IPC IPC(8): B01J27/18C02F1/30C02F101/38
CPCB01J27/1817B01J27/055B01J35/004C02F1/30C02F2101/38C02F2305/10
Inventor 李贞玉刘涛龙丹范伊焘赵苾艺杨玉琴
Owner CHANGCHUN UNIV OF TECH
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