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A highly active znin 2 the s 4 /tio 2 Z system catalyst material preparation method

A technology of znin2s4 and catalyst, which is applied in the field of photocatalytic material research, can solve the problems of weakened oxidation ability and reduction ability of semiconductor materials, reduced photocatalytic activity of visible light, and influence on photocatalytic activity of materials, and achieves excellent catalytic reduction CO2 performance and high practicality Value and application prospects, the effect of expanding the range of light absorption

Active Publication Date: 2020-06-23
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zn 2 S 4 As a visible light catalyst, although it has good application prospects, its specific surface area is small, and photogenerated electrons are easy to recombine, so its visible light photocatalytic activity is greatly reduced, and its practical application is limited.
ZnIn 2 S 4 with one-dimensional TiO 2 Semiconductor recombination to form a heterojunction structure can effectively solve this problem, but the traditional suppression heterojunction structure often weakens the oxidation ability and reduction ability of semiconductor materials, which greatly affects the photocatalytic activity of the material.

Method used

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  • A highly active znin <sub>2</sub> the s <sub>4</sub> /tio <sub>2</sub> Z system catalyst material preparation method
  • A highly active znin <sub>2</sub> the s <sub>4</sub> /tio <sub>2</sub> Z system catalyst material preparation method
  • A highly active znin <sub>2</sub> the s <sub>4</sub> /tio <sub>2</sub> Z system catalyst material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.043g zinc chloride (ZnCl 2 ), 0.018g indium chloride (InCl 3 ) and 0.1g of thioacetamide (TAA) were ultrasonically dissolved in 80mL of ethylene glycol and kept stirring at room temperature for 0.5 hours; then weighed 0.1g of TiO 2 Nanoribbon powder was added to the above solution, ultrasonically dispersed for 0.5 hours, and then stirred for 1 hour; then the formed solution was transferred to a 100mL polytetrafluoroethylene-lined autoclave, and solvothermal at 120°C for 2 hours; After the product was centrifuged, washed and separated, it was dried in an oven for 8 hours to obtain the corresponding ZnIn 2 S 4 loaded TiO 2 Nanobelt composite photocatalyst, labeled ZIS-0.25 / TO(ZnIn 2 S 4 / TiO 2 mol ratio 0.25:1).

Embodiment 2

[0021] Weigh 0.057g zinc chloride (ZnCl 2 ), 0.024g indium chloride (InCl 3 ) and 0.14g of thioacetamide (TAA) were ultrasonically dissolved in 80mL of ethylene glycol and kept stirring at room temperature for 0.5 hours; then weighed 0.1g of TiO 2 Add nanoribbon powder to the above solution, ultrasonically disperse for 0.5 hours, and then stir for 1 hour; then transfer the formed solution to a 25ml polytetrafluoroethylene-lined autoclave, and heat it at 120°C for 2 hours; After the product was centrifuged, washed and separated, it was dried in an oven for 8 hours to obtain the corresponding ZnIn 2 S 4 loaded TiO 2 Nanobelt composite photocatalyst, labeled ZIS-0.33 / TO(ZnIn 2 S 4 / TiO 2 mol ratio 0.33:1).

Embodiment 3

[0023] Weigh 0.086g zinc chloride (ZnCl 2), 0.036g indium chloride (InCl 3 ) and 0.2g of thioacetamide (TAA) were ultrasonically dissolved in 80mL of ethylene glycol and kept stirring at room temperature for 0.5 hours; then weighed 0.1g of TiO 2 Add nanoribbon powder to the above solution, ultrasonically disperse for 0.5 hours, and then stir for 1 hour; then transfer the formed solution to a 25ml polytetrafluoroethylene-lined autoclave, and heat it at 120°C for 2 hours; After the product was centrifuged, washed and separated, it was dried in an oven for 8 hours to obtain the corresponding ZnIn 2 S 4 loaded TiO 2 Nanoribbon composite photocatalyst, labeled ZIS-0.50 / TO(ZnIn 2 S 4 / TiO 2 mol ratio 0.50:1).

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Abstract

The invention relates to a ZnIn 2 S 4 / TiO 2 New method for preparing Z system composite photocatalyst. In the first step, commercial P25 and sodium hydroxide solution are used as raw materials, and after hydrothermal treatment at 180°C for 48 hours, they are mixed with H + Substitute to get H 2 Ti 3 O 7 Nanoribbons; then hydrothermal treatment with dilute sulfuric acid at 100°C and high temperature calcination at 600°C to obtain TiO with rough surface 2 nanoribbons. In the second step, according to the molar ratio of zinc (Zn), indium (In) and sulfur (S) of 1:2:4, weigh zinc chloride, indium chloride and thioacetamide and dissolve them in ethylene glycol, then The obtained TiO 2 The nanoribbons were ultrasonically dispersed in it, and then treated at 120°C for 2 hours; the resultant was centrifuged, separated, and dried in an oven for 10 hours to obtain ZnIn 2 S 4 / TiO 2 Composite photocatalyst. The new composite photocatalyst provided by the invention has excellent catalytic reduction of CO under simulated sunlight conditions. 2 Performance; its raw materials are cheap and the process is simple, so it effectively reduces product costs, broadens the light absorption range, improves the utilization rate of sunlight, and has high practical value and application prospects.

Description

technical field [0001] The present invention relates to a kind of highly active ZnIn 2 S 4 / TiO 2 The invention relates to a preparation method of a Z system catalyst material, which belongs to the technical field of photocatalytic material research. Background technique [0002] Environmental pollution and energy shortage have always been major challenges faced by human beings. With the increase of human social activities and the massive consumption of fossil energy, the atmospheric CO 2 The increase in greenhouse gas emissions has led to global warming. Plant photosynthesis is the process by which green plants convert carbon dioxide and water into carbohydrates under the action of light. Artificial photosynthesis (that is, simulating photosynthesis in nature) is the use of photocatalysts to convert solar energy into hydrogen energy under light irradiation ( or hydrocarbon fuels) can also solve environmental problems at the same time. Therefore, photocatalysts are ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01D53/86B01D53/62
CPCB01D53/62B01D53/86B01J27/04B01D2257/504B01J35/39Y02A50/20
Inventor 陈代梅丁浩杨光
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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