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NiB additive modified bismuth vanadate nano-porous thin film electrode and preparation method and application of NiB additive modified bismuth vanadate nano-porous thin film electrode

A nanoporous, thin-film electrode technology, applied in the field of materials, can solve the problem of serious carrier recombination, achieve the effect of reducing carrier recombination, reducing carrier recombination, and reducing surface and bulk carrier recombination

Active Publication Date: 2019-03-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main scientific problem of bismuth vanadate materials is that the carrier recombination between the bulk phase and the surface is serious.

Method used

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  • NiB additive modified bismuth vanadate nano-porous thin film electrode and preparation method and application of NiB additive modified bismuth vanadate nano-porous thin film electrode
  • NiB additive modified bismuth vanadate nano-porous thin film electrode and preparation method and application of NiB additive modified bismuth vanadate nano-porous thin film electrode
  • NiB additive modified bismuth vanadate nano-porous thin film electrode and preparation method and application of NiB additive modified bismuth vanadate nano-porous thin film electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 1. Bismuth vanadate nanoporous film

[0051] (1) Clean FTO: Cut the FTO conductive glass into 1×1.5cm 2 Size, ultrasonic in deionized water, acetone and ethanol solution successively for 10 minutes, washed with deionized water, dried for later use;

[0052] (2) Preparation of electrolyte: Dissolve potassium iodide in 50 mL deionized water to prepare a concentration of 0.8 mol / L, adjust the pH of the solution to 1 with concentrated nitric acid, then add bismuth nitrate to make the concentration 0.03 mol / L, stir evenly, and use it as a solution c. Dissolve 1,4-p-benzoquinone in 20 mL of ethanol to prepare a concentration of 0.4 mol / L as solution D. Finally, slowly add solution D to solution C, drop 1-3ml per minute at a constant speed, ultrasonic or stir to mix evenly

[0053] (3) Electrodeposition: In a standard three-electrode electrochemical cell, the FTO conductive glass is used as the working electrode, the platinum electrode is used as the counter electrode, and ...

Embodiment 2

[0073] 1. bismuth vanadate nanoporous film, method is the same as embodiment 1, and difference is that the concentration of potassium iodide is 0.02mol / L in the electrolytic solution preparation process.

[0074] 2. The bismuth vanadate nanoporous film modified by NiB auxiliary agent, the method is the same as embodiment 1.

[0075] 3. The bismuth vanadate nanoporous film modified by NiB additives is used in the photoelectrochemical cell to produce hydrogen by photolysis of water, and the method is the same as in Example 1.

[0076] The experimental results show that the synthesized bismuth vanadate nanofilm is still a coral-like nanoporous structure, but its uniformity and compactness are lower than that of the bismuth vanadate film synthesized in Example 1, and the light transmittance is slightly lower than that of Example 1. The synthesized bismuth vanadate film has a transmittance of 50-55% for red light. The synthesized bismuth vanadate nanoporous film is biased at 1.23V...

Embodiment 3

[0078] 1. bismuth vanadate nanoporous film, method is the same as embodiment 1, and difference is that in the electrolytic solution preparation process, the concentration of 1,4-p-benzoquinone is 0.2mol / L.

[0079] 2. The bismuth vanadate nanoporous film modified by NiB auxiliary agent, the method is the same as embodiment 1.

[0080] 3. The bismuth vanadate nanoporous film modified by NiB additives is used in the photoelectrochemical cell to produce hydrogen by photolysis of water, and the method is the same as in Example 1.

[0081] The experimental results show that the synthesized bismuth vanadate nanofilm is still a coral-like nanoporous structure, but its uniformity and compactness are lower than that of the bismuth vanadate film synthesized in Example 1, and the light transmittance is slightly lower than that of Example 1. The synthesized bismuth vanadate film has a transmittance of 50-55% for red light. The synthesized bismuth vanadate nanoporous film is biased at 1.2...

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Abstract

The invention discloses a NiB additive modified bismuth vanadate nano-porous thin film electrode and a preparation method and application of the NiB additive modified bismuth vanadate nano-porous thinfilm electrode. A NiB cocatalyst is in a particular shape to adhere to the surface of a bismuth vanadate nano-porous thin film. The preparation method of the NiB additive modified bismuth vanadate nano-porous thin film electrode comprises the three steps of preparing of the bismuth vanadate nano-porous thin film electrode, preparing of a NiB particular additive through liquid phase reduction, andloading of the NiB cocatalyst. According to the NiB additive modified bismuth vanadate nano-porous thin film electrode and the preparation method and application of the NiB additive modified bismuthvanadate nano-porous thin film electrode, the separation efficiency of the bismuth vanadate nano-porous photoelectrode surface and bulk phase carriers is effectively improved, water decomposition performance of a photoelectrochemical cell is superior, the preparation method is simple, raw materials are low in cost and easy to obtain, and low-cost and large-scale application can be realized.

Description

technical field [0001] The invention belongs to the field of material technology, and more specifically relates to a bismuth vanadate nano-porous electrode material modified by NiB additives and a preparation method thereof, which is applied in the field of semiconductor electrodes of photoelectrochemical cells. Background technique [0002] With the increasing tension of fossil energy, the use of new green renewable energy to replace non-renewable fossil energy has become the focus of attention all over the world. Hydrogen energy has attracted much attention among many renewable energy sources because of its high-energy, clean and direct combustion advantages. As a new type of hydrogen production method, solar photoelectrochemical cell decomposes water to produce hydrogen, which truly realizes the green and rational use of solar energy, and the whole cycle is green and pollution-free, which is very in line with the requirements of current energy development. Since the earl...

Claims

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Application Information

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IPC IPC(8): C25B11/03C25B11/06C25B1/04C25D9/04
CPCC25B1/04C25D9/04C25B1/55C25B11/031C25B11/091Y02E60/36Y02P20/133
Inventor 巩金龙党珂常晓侠王拓
Owner TIANJIN UNIV
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