A kind of tin sulfide-graphene oxide composite photocatalyst and its preparation method and application

A graphene composite and photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, water treatment of special compounds, etc., can solve the problems of increasing process and complexity, and improve visible light catalytic activity and performance , the effect of mild synthetic conditions

Active Publication Date: 2019-07-16
YANCHENG INST OF TECH
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Problems solved by technology

However, this method controls the morphology and particle size of the synthetic material by controlling various factors such as the sulfur source, which increases the process and complexity to a certain extent.

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  • A kind of tin sulfide-graphene oxide composite photocatalyst and its preparation method and application
  • A kind of tin sulfide-graphene oxide composite photocatalyst and its preparation method and application
  • A kind of tin sulfide-graphene oxide composite photocatalyst and its preparation method and application

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preparation example Construction

[0037] The preparation method of tin sulfide-graphene oxide composite photocatalyst comprises step S1: mixing stannous chloride dihydrate, water and ethylene glycol to obtain a first mixed solution.

[0038] Wherein, the dosage ratio of stannous chloride dihydrate, water and ethylene glycol is 0.27-0.31g: 8-12ml: 185-195ml.

[0039] The water is selected from one or more of deionized water, distilled water and ultrapure water, preferably deionized water.

[0040] The preparation method of the tin sulfide-graphene oxide composite photocatalyst further includes step S2: mixing the first mixed solution with the graphene oxide solution to obtain a second mixed solution.

[0041] Wherein, the concentration of the graphene oxide solution is 8-12 mg / ml, preferably 10 mg / ml. The graphene oxide solution with this concentration is beneficial to the deposition of tin sulfide nanoparticles.

[0042] The volume ratio of the first mixed solution to the graphene oxide solution is 193-207:1...

Embodiment 1

[0056] The preparation method of the tin sulfide-graphene oxide composite photocatalyst provided by the present embodiment comprises the following steps:

[0057] Step S1: Mix stannous chloride dihydrate, distilled water and ethylene glycol according to the dosage ratio of 0.27g: 12ml: 185ml to obtain the first mixed solution;

[0058] Step S2: disperse the graphene oxide in deionized water and ultrasonically for 4 hours (amplitude set to 45%) to obtain a graphene oxide solution with a concentration of 8 mg / ml, and mix the first mixed solution with the graphene oxide solution according to the ratio of 197:17 The volume ratio is mixed to obtain the second mixed solution;

[0059] Step S3: Mix the second mixed solution with polyvinylpyrrolidone and sodium thiosulfate according to the dosage ratio of 214ml: 0.002g: 0.2g to obtain the third mixed solution;

[0060] Step S4: Use ammonia water to adjust the pH of the third mixed liquid to 7.5, then place the third mixed liquid in a...

Embodiment 2

[0065] The preparation method of the tin sulfide-graphene oxide composite photocatalyst provided by the present embodiment comprises the following steps:

[0066] Step S1: Mix stannous chloride dihydrate, ultrapure water and ethylene glycol according to the dosage ratio of 0.31g:8ml:195ml to obtain the first mixed solution;

[0067] Step S2: disperse the graphene oxide in deionized water and ultrasonically for 5 hours (amplitude set to 50%) to obtain a graphene oxide solution with a concentration of 12 mg / ml, and mix the first mixed solution and the graphene oxide solution according to the ratio of 203:23 Mix by volume ratio to obtain the second mixed solution, and ultrasonically treat the second mixed solution for 32 minutes;

[0068] Step S3: Mix the second mixed solution with polyvinylpyrrolidone and sodium thiosulfate according to the dosage ratio of 226ml: 0.002g: 0.205g to obtain the third mixed solution. Place the third mixed solution at room temperature and stir it mag...

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Abstract

The invention provides a tin sulfide-graphene oxide composite photocatalyst, its preparation method and application, and relates to the technical field of photocatalysts. The preparation method of tin sulfide-graphene oxide composite photocatalyst comprises the following steps: Step S1: mix tin protochloride dihydrate, water and ethylene glycol, obtain the first mixed solution; Step S2: mix the first mixed solution with Mixing the graphene oxide solution to obtain a second mixed solution; step S3: mixing the second mixed solution with polyvinylpyrrolidone and sodium thiosulfate to obtain a third mixed solution; step S4: adjusting the pH of the third mixed solution to 7.5 ~9, then place the third mixed liquid under the microwave condition of 800w, and heat in intervals, heating for 8~12s each time, with an interval of 8~12s between each two heatings, and heating for 3~5min in total; Step S5: To step The material obtained in S4 is washed, centrifuged and dried.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a tin sulfide-graphene oxide composite photocatalyst and its preparation method and application. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, the sustainable development of human society is facing great challenges. In recent years, semiconductor photocatalysis technology, as an energy-saving and environmentally friendly new technology that can be used for environmental purification, has attracted extensive attention from scientists in many fields because of its important application prospects. The photocatalyst used in traditional photocatalytic technology is titanium dioxide (TiO 2 ), however due to TiO 2 With a wide band gap, there are disadvantages such as low quantum efficiency and low solar energy utilization, which restrict the practical application of photocatalytic technology. [0003] Binary compounds of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/38
CPCB01J27/04B01J35/004C02F1/30C02F2101/308C02F2101/38C02F2305/10
Inventor 朱雷张勤芳王保林樊乐乐孟强强
Owner YANCHENG INST OF TECH
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