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{111} crystal face highly-exposed titanium dioxide efficient photoelectrode and preparation and application thereof

A {111}, titanium dioxide technology, applied in the field of high-efficiency titanium dioxide photoelectrodes, to achieve good dispersion and firmness, improved safety factor, and wide light absorption range

Active Publication Date: 2021-04-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent has high photoelectric catalytic degradation performance, but there is still a lot of room for improvement in the degradation and removal performance of pollutants such as dimethyl phthalate

Method used

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  • {111} crystal face highly-exposed titanium dioxide efficient photoelectrode and preparation and application thereof
  • {111} crystal face highly-exposed titanium dioxide efficient photoelectrode and preparation and application thereof
  • {111} crystal face highly-exposed titanium dioxide efficient photoelectrode and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of rutile TiO 2 The preparation method of / Ti photoelectrode specifically comprises the following steps:

[0038] (1) Cut the titanium mesh into a size of 4.5cm×7cm, fold it into double layers along the long side, and put it in a mixture of hydrochloric acid and water (hydrochloric acid: water volume ratio 1:1, the concentration of hydrochloric acid used here is 36-38%) ) for chemical polishing, followed by ultrasonic cleaning with deionized water and absolute ethanol for 3 times after 5 min, and stored in absolute ethanol for later use.

[0039] (2) Dry the chemically polished titanium mesh in step (1), and calcine it in an air atmosphere with a heating rate of 3°C / min, a calcination temperature of 700°C, and a calcination time of 3h to obtain rutile TiO 2 / Ti photoelectrode.

Embodiment 2

[0041] A {111} TiO with Highly Exposed {111} Facets 2 The preparation method of / Ti photoelectrode specifically comprises the following steps:

[0042] (1) Cut the titanium mesh into a size of 4.5cm×7cm, fold it into double layers along the long side, and put it in a mixed acid solution containing nitric acid, hydrofluoric acid and water (nitric acid: hydrofluoric acid: water volume ratio 5:1:25) ) for chemical polishing, took it out after 30 s, and cleaned it with deionized water and absolute ethanol by ultrasonic vibration for three times, and finally stored it in absolute ethanol for later use.

[0043] (2) Mix 1.9mL hydrochloric acid (mass fraction 36-38%), 450μL hydrogen peroxide (mass fraction 30%) and 7.65mL deionized water, stir evenly, transfer to a 150mL autoclave lining, put For a self-made ring-shaped polytetrafluoroethylene support, lay the double-layer titanium mesh that has been chemically polished in step (1) above the support, at a distance of 6.0 cm from the ...

Embodiment 3～ Embodiment 4

[0047] Compared with Example 2, most of them are the same, except in this example: in the specific process of titanium mesh polishing treatment, the volume ratios of nitric acid, hydrofluoric acid and water forming the polishing solution are respectively 5:1:20 and 5:1:30.

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Abstract

The invention relates to a {111} crystal face highly-exposed titanium dioxide efficient photoelectrode and preparation and application thereof. The preparation process comprises the following steps that a titanium mesh serves as a titanium source, hydrochloric acid serves as a morphology control agent, hydrogen peroxide serves as an oxidizing agent, and a one-dimensional vertical rutile TiO2 nanorod with the top end {111} crystal face exposed grows on a titanium mesh substrate in situ through a gas phase hydrothermal method; by adjusting the hydrothermal reaction time, the exposure proportion of the {111} crystal face is optimized to be close to 100%, and the prepared {111} TiO2 / Ti photoelectrode can be applied to deep removal of dimethyl phthalate (DMP) wastewater. Compared with the prior art, the {111} TiO2 / Ti efficient photoelectrode prepared by the method selects a titanium mesh as the titanium source, a {111} crystal face highly exposed one-dimensional titanium dioxide nanorod structure is constructed, and the {111} TiO2 / Ti efficient photoelectrode has efficient photoelectrocatalytic oxidation capacity and high stability and can be recycled.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalysis, and relates to a high-efficiency titanium dioxide photoelectrode with highly exposed {111} crystal planes and its preparation and application. Background technique [0002] Phthalates esters (PAEs) are a class of synthetic chemicals widely used in polyvinyl chloride products, food packaging, coatings, toys, and personal care products to enhance the flexibility and ductility of products. Since PAEs are not chemically combined with host plastics, they are easily released from plastic products into the surrounding environment, and even enter organisms, thereby affecting the reproductive system of organisms, resulting in teratogenicity and carcinogenicity. Due to the high toxicity of PAEs, its pollution has been widely concerned, and many countries and regions have listed some PAEs as key pollutants for control. In my country, dimethyl phthalate (DMP), diethyl phthalate (DEP) and dio...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/30C02F101/34
CPCY02W10/37
Inventor 张亚男谷晓彤胡艺琼赵国华
Owner TONGJI UNIV
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