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Spiral titanium dioxide photoelectrode and preparation method and application thereof

A technology of titanium dioxide and photoelectrode, which is applied in the field of semiconductor photocatalysis, can solve problems such as limited application capabilities, and achieve the effects of easy operation, tube wall thickness, and tube diameter calibration

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide band gap (about 3.2 eV) of titanium dioxide, it can only use ultraviolet light with a wavelength of less than 387 nm (accounting for about 5% of sunlight), which greatly limits its application ability.

Method used

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  • Spiral titanium dioxide photoelectrode and preparation method and application thereof
  • Spiral titanium dioxide photoelectrode and preparation method and application thereof
  • Spiral titanium dioxide photoelectrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of helical titanium dioxide photoelectrode material, its preparation method specifically comprises the following steps:

[0032] (1) Cut a commercial titanium sheet (99.99% pure) into a size of 20 × 20 × 0.5 mm, and then ultrasonically clean it with acetone (30 mL), isopropanol (30 mL) and distilled water (30 mL) for 10 min. , chemical polishing in 30 mL of a mixed solution containing hydrofluoric acid, nitric acid and distilled water (the volume ratio of hydrofluoric acid, nitric acid and distilled water is 1:4:5, the mass fraction of hydrofluoric acid is 40%, and the mass fraction of nitric acid is 65%) After taking it out for 3 minutes, it was ultrasonically cleaned with distilled water for 3 times, and finally dried with high-purity nitrogen to obtain a titanium sheet with a clean and smooth surface.

[0033] (2) Prepare 60 mL of electrolyte solution containing ammonium fluoride, glycerin and distilled water, the volume ratio of glycerin and distilled water i...

Embodiment 2

[0041] The experimental process repeats the operation steps of Example 1, the difference is only that "the operation process of step (4) is replaced by: only use a DC power supply to react at a voltage of 30V for 2h", and the rest of the operations are the same as in Example 1. That is to say, the present embodiment 2 is compared with the embodiment 1, except that the electric pulse method is not used to adjust the electrochemical anodic oxidation process in the present embodiment 2, other processes are all the same as the embodiment 1, finally made titanium dioxide nanotubes photoelectrode.

Embodiment 3

[0043] The experimental process repeats the operation steps of Example 1, the difference is only that "the operation process of step (4) is replaced by: the electric pulse frequency is set by the timing switch to be 5s after every energization, and the power is turned off for 5s until the reaction ends, and the DC power supply voltage is adjusted. was 30 V, the total effective energization time was 2 h, and the electrochemical pulse anodic oxidation reaction was carried out", and the rest of the operations were the same as in Example 1, and finally an anatase helical titanium dioxide photoelectrode was obtained.

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Abstract

The invention discloses a spiral titanium dioxide photoelectrode and a preparation method and application thereof.The preparation method of the spiral titanium dioxide photoelectrode comprises the following steps that a metal titanium sheet is taken, subjected to chemical polishing and then placed in an electrolyte containing ammonium fluoride, glycerin and distilled water; in-situ growth of spiral titanium dioxide is carried out on a metal titanium sheet substrate by adopting an electrochemical pulse anodic oxidation method, an obtained reacted sample is cleaned by distilled water and blow-dried by nitrogen, and then high-temperature calcination is carried out, so that the spiral titanium dioxide photoelectrode is formed. According to the spiral titanium dioxide photoelectrode, the TiO2 photoresponse range can be expanded, photo-induced electron-hole separation is promoted, then bisphenol A in a water body is effectively removed, and the effect of the spiral titanium dioxide photoelectrode applied to photoelectrocatalytic degradation of bisphenol A in wastewater under simulated sunlight is better than that of a conventional titanium dioxide nanotube.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photoelectric catalysis, and in particular relates to a spiral titanium dioxide photoelectrode and its preparation method and application. Background technique [0002] Environmental endocrine disruptors are emerging pollutants that have reversible or irreversible adverse effects on living organisms or offspring by interfering with endocrine system functions, and have attracted widespread attention. Bisphenol A (BPA) is a typical endocrine disruptor. It has a stable structure, strong toxicity, and is not easy to decompose. Long-term exposure will destroy the regular secretion of hormones in the organism, and then cause reproductive toxicity, neurotoxicity and other problems. As an important industrial chemical, BPA is widely used in the production of various polymer materials, such as polycarbonate, epoxy resin, polyphenylene ether resin, etc., and is also commonly used in the processing and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F1/30C02F101/34
CPCC02F1/46109C02F1/725C02F1/30C02F2001/46133C02F2101/345C02F2101/305Y02W10/37
Inventor 汤俊涛黄森辉何志桥宋爽陆展锋
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