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locally oxidized sns 2 Process for the preparation of flakes and their products and uses

A technology of local oxidation and thin slices, which is applied in the direction of chemical instruments and methods, chemical/physical processes, tin compounds, etc., can solve the problems of few active sites, weak intrinsic activity, low yield of thin slices and cannot produce thin slices, and achieve the source Effects of rich, broad social and economic significance

Active Publication Date: 2020-03-27
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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  • locally oxidized sns <sub>2</sub> Process for the preparation of flakes and their products and uses
  • locally oxidized sns <sub>2</sub> Process for the preparation of flakes and their products and uses
  • locally oxidized sns <sub>2</sub> Process for the preparation of flakes and their products and uses

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 dodecylbenzene sulfonate (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, ...

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Abstract

The invention discloses a hydrothermal method for preparing partially oxidized SnS 2 New methods of flakes and their products and uses. More specifically, the method of the present invention includes sequentially dissolving dodecyl benzene sulfonate, soluble tin salt and L-cysteine ​​at a mass ratio of 3 to 5:1:2 to 4 in a volume ratio of 5.5: In a mixed solvent of water and ethylene glycol in a ratio of 1 to 1:4.5 and stirred, the reaction is carried out in a sealed reactor at 150 to 170°C, and finally separated, washed and dried, and the resulting partially oxidized SnS 2 flakes can be used to convert CO 2 Photocatalytic reduction to CO. Partially oxidized SnS obtained by the method of the invention 2 Thin sheets have better photocatalytic reduction of CO 2 to CO performance, utilizing the partially oxidized SnS obtained by the present invention 2 Thin sheets can achieve high-efficiency photocatalytic reduction of carbon dioxide at normal temperature and pressure, and compared with unoxidized SnS 2 Thin slices, made of CO under visible light irradiation 2 The rate of CO generation is about 3 times.

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 Patents(China)
IPC IPC(8): C01G19/00B01J27/04B01J35/02B01J35/00
CPCC01G19/00B01J27/04C01P2002/72C01P2004/04C01P2002/82B01J35/00B01J35/30B01J35/39
Inventor 孙永福焦星辰谢毅
Owner UNIV OF SCI & TECH OF CHINA
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