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A 3D flower-like cuwo for photoelectrocatalysis 4 /niooh thin film preparation method

A three-dimensional flower-like, photoelectric catalysis technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc. The problems of less common research on appearance, etc., to achieve the effect of simple and feasible preparation method, improved separation efficiency, and low cost of raw materials

Active Publication Date: 2021-05-07
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But CuWO 4 There are also shortcomings such as low separation efficiency and low transport performance of photogenerated carriers. Researchers usually use supported co-catalysts such as (NiOOH, Co-Pi, etc.) to improve the carrier separation efficiency of the material, thereby improving its charge. Transport, enhance its photocatalytic water splitting ability
[0003] In recent years, for CuWO 4 There are few joint studies on photocatalytic modification and morphology, and the three-dimensional flower-like CuWO 4 There are relatively few reports on the photocatalysis of NiOOH thin films.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The embodiment of the present invention discloses a three-dimensional flower-like CuWO for photocatalysis 4 The preparation method of / NiOOH thin film, it may further comprise the steps:

[0020] Add 1.49g of ammonium metatungstate to 50mL of absolute ethanol, stir magnetically at room temperature for 10min, then add 0.09g of copper chloride, and continue stirring for 1h to obtain a light blue sol, which is CuWO 4 Precursor sol; get 0.01mol L -1 CuWO 4 Precursor;

[0021] CuWO prepared in the above steps with the cleaned FTO conductive glass at a speed of 1mm / s 4 After dipping in the precursor sol for 15s, pull it up, put it in an oven at 80°C and dry it; then repeat the coating, and dry the FTO conductive glass that has completed the second coating in an oven at 80°C for 1 hour; place the dried sample in a muffle Heat up to 500°C in the furnace for annealing for 2 hours to obtain CuWO 4 film;

[0022] 1.60g NiSO 4 Dissolve in 60mL of distilled water, stir at room...

Embodiment 2

[0025] The embodiment of the present invention discloses a three-dimensional flower-like CuWO for photocatalysis 4 The preparation method of / NiOOH thin film, it may further comprise the steps:

[0026] Add 2.03g of ammonium metatungstate to 50mL of absolute ethanol, stir magnetically at room temperature for 12min, then add 0.12g of copper chloride, and continue stirring for 1.5h to obtain a light blue sol, which is CuWO 4 Precursor sol; get 0.015mol L -1 CuWO 4 Precursor;

[0027] CuWO prepared in the above steps with the cleaned FTO conductive glass at a speed of 1mm / s 4 After dipping in the precursor sol for 21s, pull it up, put it in an oven at 80°C to dry; then perform repeated coating, and dry the FTO conductive glass that has completed the second coating in an oven at 80°C for 1 to 4 hours; place the dried sample in In the muffle furnace, the temperature was raised to 520 °C and annealed for 2 hours to obtain CuWO 4 film;

[0028] 2.53g NiSO 4 Dissolve in 60mL of ...

Embodiment 3

[0031] The embodiment of the present invention discloses a three-dimensional flower-like CuWO for photocatalysis 4 The preparation method of / NiOOH thin film, it may further comprise the steps:

[0032] Add 4.11g of ammonium metatungstate to 50mL of absolute ethanol, stir magnetically at room temperature for 14min, then add 0.22g of copper chloride, continue stirring for 2h to obtain a light blue sol, which is CuWO 4Precursor sol; get 0.025mol L -1 CuWO 4 Precursor;

[0033] CuWO prepared in the above steps with the cleaned FTO conductive glass at a speed of 1mm / s 4 After dipping in the precursor sol for 28s, pull it up, put it in an oven at 80°C and dry it; then repeat the coating, and dry the FTO conductive glass that has completed the second coating in an oven at 80°C for 3.8 hours; place the dried sample in a horse Heat up to 550°C for 2 hours in a Furnace to obtain CuWO 4 film;

[0034] 3.15g NiSO 4 Dissolve in 60mL of distilled water, stir at room temperature for 3...

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PUM

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Abstract

The invention discloses a three-dimensional flower-like CuWO for photoelectric catalysis 4 / NiOOH film preparation method. The present invention can achieve a significant increase in photocurrent density, including the following steps: 1. Ammonium metatungstate is added to absolute ethanol, magnetically stirred, copper chloride is added, and the stirring is continued to obtain CuWO 4 Precursor sol; 2 CuWO prepared in step 1 by FTO conductive glass 4 After dipping in the precursor sol, pull and dry; repeat the coating, and dry the FTO conductive glass that has completed the second coating; anneal the sample to obtain CuWO 4 thin film; 3 through NiSO 4 NiOOH deposition solution is obtained; 4 is subjected to electrochemical deposition to obtain CuWO 4 / NiOOH, followed by repeated washing with absolute ethanol and distilled water, and drying to obtain three-dimensional flower-like CuWO 4 / NiOOH composite film. The preparation method of the invention is simple and feasible, the raw material cost is low, and the photocurrent density is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalysis, in particular to a three-dimensional flower-shaped CuWO used for photoelectric catalysis 4 / NiOOH film preparation method. Background technique [0002] The consumption of traditional petroleum and fossil energy has caused problems such as global warming, environmental pollution and energy shortage, which are major challenges facing human beings. In this context, the "low-carbon economy" based on low energy consumption and low pollution is becoming a focus of global concern and research. As an efficient and clean secondary energy carrier, hydrogen is known as "the oil of the future". Therefore, the development and utilization of pollution-free hydrogen energy is a way to achieve a low-carbon economy. The development of non-polluting, low-cost hydrogen production technology has attracted increasing attention from various countries. As early as 1972, Fujishima and Honda of the U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/885B01J35/06B01J37/02B01J37/34C01B3/04
CPCC01B3/042B01J23/885B01J37/0201B01J37/348C01B2203/0277C01B2203/1041B01J35/33B01J35/59B01J35/39Y02E60/36
Inventor 刘志华周苗刘志锋
Owner TIANJIN CHENGJIAN UNIV