Preparing method of partly-oxidized SnS2 sheet and product and application of sheet

A local oxidation and flake technology, applied in chemical instruments and methods, inorganic chemistry, tin compounds, etc., can solve the problems of weak intrinsic activity, few active sites, affecting the activity of photocatalytic reduction of CO2, etc., to achieve a broad social and economic Meaningful, source-rich effects

Active Publication Date: 2019-01-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many metal sulfide catalysts such as zinc sulfide and cadmium sulfide have been proved to be able to realize the photocatalytic reduction of CO 2 , but the shortcomings of the usual bulk metal sulfide materials, such as few active sites and weak intrinsic activity, seriously affect its photocatalytic reduction of CO 2 activity[Journal of Crystal Growth 2011,328,70-73]
In order to overcome the problem of such bulk metal sulfide materials, [Angew.Chem.Int.Ed.2012,51,8727-8731] reported that by preparing metal sulfide flakes (typically in the thickness size range of 0.5nm~2nm) , however, this method obtains flake products by ultrasonically exfoliating bulk samples, which has a low flake yield and cannot obtain locally oxidized flake products by this method

Method used

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  • Preparing method of partly-oxidized SnS2 sheet and product and application of sheet
  • Preparing method of partly-oxidized SnS2 sheet and product and application of sheet
  • Preparing method of partly-oxidized SnS2 sheet and product and application of sheet

Examples

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Effect test

Embodiment 1

[0034] In a polytetrafluoroethylene autoclave, 300mg sodium dodecylbenzenesulfonate (Sinopharm Chemical Reagent Co., Ltd.), 88mg tin tetrachloride (Sinopharm Chemical Reagent Co., Ltd., purity ≥ 99%) and 240mg L- Cysteine ​​(Sinopharm Chemical Reagent Co., Ltd., purity ≥ 99%) was successively dissolved in 15 mL of deionized water and 15 mL of ethylene glycol mixed solvent, and placed on an electric heating mantle stirrer (Shanghai Meiyingpu Instrument Manufacturing Co., Ltd. 08-2T), after stirring for 30 minutes at a rotating speed of 300r / min, the resulting mixed solvent was poured into a 40mL autoclave and after sealing, it was put into an oven (Shanghai Jinghong Experimental Equipment Co., Ltd. XMTD-8222) and heated to Reaction at 160°C for 10h. After the reaction was completed, it was naturally cooled to room temperature, and centrifuged at a speed of 1000 rpm in a high-speed centrifuge (Anhui Zhongke Zhongjia Scientific Instrument Co., Ltd. HC-3518) to obtain a solid prod...

Embodiment 2

[0037] In a polytetrafluoroethylene autoclave, 300 mg of sodium dodecylbenzenesulfonate (Sinopharm Chemical Reagent Co., Ltd.), 80 mg of tin nitrate (Sinopharm Chemical Reagent Co., Ltd., purity ≥ 99%) and 260 mg of L-cysteine Amino acid (Sinopharm Chemical Reagent Co., Ltd., purity ≥ 99%) was dissolved in 25mL deionized water and 5mL ethylene glycol mixed solvent in turn, and placed on the electric heating mantle stirrer (Shanghai Meiyingpu Instrument Manufacturing Co., Ltd. 08- 2T), after stirring for 30 minutes at a rotating speed of 300r / min, pour the resulting mixed solvent into a 40mL autoclave and after sealing it, put it into an oven (XMTD-8222 from Shanghai Jinghong Experimental Equipment Co., Ltd.) and heat it to 165°C Reaction 10h. After the reaction was completed, it was naturally cooled to room temperature, and centrifuged at a speed of 1000 rpm in a high-speed centrifuge (Anhui Zhongke Zhongjia Scientific Instrument Co., Ltd. HC-3518) to obtain a solid product, w...

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Abstract

The invention discloses a novel method for preparing a partly-oxidized SnS2 sheet through a hydrothermal method and a product and application of the sheet. More specifically, the method includes the steps of sequentially dissolving dodecyl benzene sulfonate, soluble tin salt and L-cysteine with the mass ratio of (3-5):1:(2-4) in a mixed solvent of water and ethylene glycol with the volume ratio of5.5:1 to 1:4.5 to be mixed, carrying out a reaction in a sealed reactor at 150-170 DEG C, and finally conducting separating, washing and drying to obtain the partly-oxidized SnS2 sheet. The obtainedpartly-oxidized SnS2 sheet can be used for photocatalytically reducing CO2 into CO. The partly-oxidized SnS2 sheet obtained through the method has more excellent performance of photocatalytically reducing CO2 into CO. Through the partly-oxidized SnS2 sheet obtained through the method, carbon dioxide can be efficiently and photocatalytically reduced at normal temperature and normal pressure, and the speed of generating CO from CO2 under the illumination of visible light is about three times that of an unoxidized SnS2 sheet.

Description

technical field [0001] The present invention relates to locally oxidized SnS 2 Process for the preparation of flakes and their products and uses. Background technique [0002] In today's society, the rapid development of industry has brought serious environmental pollution and energy shortages. How to effectively solve energy and environmental problems has become a worldwide issue. Excessive use of fossil fuels releases large amounts of CO 2 , resulting in CO in the atmosphere 2 The concentration of the main greenhouse gases continues to increase, which greatly hinders the sustainable development of human society. However, CO 2 It is also a potential carbon resource, so how to effectively use CO 2 has become a global hotspot, because the CO 2 Converting to clean energy can help to solve the problems of energy shortage and environmental degradation at the same time. The photocatalytic reduction of CO 2 It is considered to be a very potential solution, because light en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00B01J27/04B01J35/02
CPCB01J27/04B01J35/004B01J35/02C01G19/00C01P2002/72C01P2002/82C01P2004/04
Inventor 孙永福焦星辰谢毅
Owner UNIV OF SCI & TECH OF CHINA
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