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Copper bismuthate/ tungsten oxide composite film material, preparation method and application thereof in preparation of methane by photocatalytic carbon dioxide

A composite film, tungsten oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbon production from carbon oxides, etc., can solve the problem of low solar energy utilization and narrow light response range. and other problems, to achieve the effect of stable structure, wide application prospects and high utilization rate

Active Publication Date: 2019-05-21
HENAN INST OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing commercial photocatalytic material P25 (TiO 2 ) Although it exhibits certain photocatalytic properties, the photoresponse range of the material is too narrow and the utilization rate of solar energy is low

Method used

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  • Copper bismuthate/ tungsten oxide composite film material, preparation method and application thereof in preparation of methane by photocatalytic carbon dioxide
  • Copper bismuthate/ tungsten oxide composite film material, preparation method and application thereof in preparation of methane by photocatalytic carbon dioxide
  • Copper bismuthate/ tungsten oxide composite film material, preparation method and application thereof in preparation of methane by photocatalytic carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A CuBi 2 o 4 / WO 3 The preparation method of composite film material, it specifically comprises the steps:

[0032]1) Pretreatment of FTO conductive glass: Soak 1×2cm FTO conductive glass in ethanol and deionized water in sequence, place it in a 400W ultrasonic cleaner for ultrasonic cleaning for 30min, remove the FTO conductive glass, dry it with nitrogen, and place it in 150W After 30 minutes of irradiation under a long-arc mercury lamp, weigh and record the mass of FTO glass as m 0 ;

[0033] 2) WO 3 Seed layer preparation: Weigh 2.0 g of tungstic acid into 50 mL of hydrogen peroxide, heat to 60°C and reflux and stir for 1.5 hours to obtain a tungstic acid solution. Take 20 μL of tungstic acid solution and add it dropwise on the surface of the FTO conductive glass obtained in step 1). The machine spin-coated evenly at a speed of 2000rpm for 10s, placed the FTO conductive glass in a muffle furnace, raised the temperature to 500°C at a speed of 5°C / min, and kept i...

Embodiment 2

[0037] A CuBi 2 o 4 / WO 3 The preparation method of composite film material composite fiber, it specifically comprises the following steps:

[0038] 1) Pretreatment of FTO conductive glass: Soak 1×2cm FTO conductive glass in ethanol and deionized water in turn, place it in a 400W ultrasonic cleaner for 30 minutes, remove the FTO conductive glass, dry it with nitrogen, and place it in 150W After 30 minutes of irradiation under a long-arc mercury lamp, weigh and record the mass of FTO glass as m 0 ';

[0039] 2) WO 3 Seed layer preparation: Weigh 3.0 g of tungstic acid into 75 mL of hydrogen peroxide, heat to 75°C and reflux and stir for 3.0 hours to obtain a tungstic acid solution. Take 20 μL of tungstic acid solution and add it dropwise on the surface of the FTO conductive glass obtained in step 1). The machine spin-coated evenly at a speed of 2000rpm for 15s, placed the FTO conductive glass in a muffle furnace, raised the temperature to 500°C at a speed of 5°C / min, and k...

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Abstract

The invention relates to a preparation method of a copper bismuthate / tungsten oxide composite film material, which comprises the following steps:1) the FTO loaded with tungsten oxide seed layer is ina tungstic acid solution for heat preservation at 180 DEG C to 200 DEG C for 8-10h, then the FTO is naturally cooled to room temperature and dried to obtain a sheet of WO3 film material on the FTO surface; 2) a mixed aqueous solution of copper nitrate and bismuth nitrate spin-coats on the flaky WO3 film material, then is placed the mixture in a muffle furnace at 550-650 DEG C for heat preservation for 10-24 hours, and naturally is cooled to obtain the CuBi2O4 / WO3 composite film material. The composite film material is cheap and can be obtained easily, the structure is stable, the visible light catalysis carbon dioxide reduction activity is high, the product selectivity is good, the circulation stability is good, the catalyst recovery rate is high, and the composite film material has wideapplication prospect in the fields of photocatalysis technology, CO2 energy conversion and the like.

Description

technical field [0001] The invention belongs to the technical field of film material preparation and photocatalytic carbon dioxide reduction, in particular to a copper bismuthate / tungsten oxide (CuBi 2 o 4 / WO 3 ) Composite thin film material, preparation method and its application in photocatalytic carbon dioxide reduction to methane. Background technique [0002] With the rapid development of society and industry and the massive consumption of fossil fuels, the concentration of carbon dioxide in the atmosphere has risen sharply. It will cause global warming and sea level rise, and at the same time, it will also cause an imbalance in the carbon cycle in the atmosphere and biosphere, making human beings face the problem of global warming while facing an increasingly severe energy crisis. Although CO 2 It can be used as a potential carbon energy source, but its chemical properties are stable, and additional energy input is required to activate it and convert it into a usa...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J37/10B01J37/08B01J35/06C07C1/12C07C9/04
Inventor 王吉超史维娜娄慧慧侯玉霞李英陈梦娟崔增辉王文霞
Owner HENAN INST OF SCI & TECH
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