Three-dimensional TiO2 photoelectrode with efficient visible light response as well as construction and application thereof

A visible light and photoelectrode technology, applied in electrodes, light water/sewage treatment, electrolysis process, etc., can solve the problems of low degradation and removal efficiency, unsatisfactory catalytic oxidation performance, etc., and achieve high-efficiency photocatalytic oxidation surface characteristics, high-efficiency visible light Photoelectric catalytic performance and the effect of promoting efficient photoelectric synergistic catalytic oxidation removal

Inactive Publication Date: 2019-12-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic oxidation performance of the existing general photoelectrode materials is not particularly ideal, especially for pollutants such as bisphenol A, the degradation and removal efficiency is low, such as a porous coral coral disclosed in Chinese patent 201811505359.9 The preparation method and application of nanostructured tungsten trioxide photoelectrode, the efficiency of its degradation and removal of bisphenol A is only about 58.4%

Method used

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  • Three-dimensional TiO2 photoelectrode with efficient visible light response as well as construction and application thereof
  • Three-dimensional TiO2 photoelectrode with efficient visible light response as well as construction and application thereof
  • Three-dimensional TiO2 photoelectrode with efficient visible light response as well as construction and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] An Anatase {001} TiO with Highly Exposed {001} Facets 2 The preparation method of / Ti photoanode specifically comprises the following steps:

[0039] Fold the metal Ti mesh into double layers and cut it into 3.5×4.5cm 2 Size, in chemical polishing solution (volume ratio: HNO 3 :HF:H 2 (O=5:1:25) soaked in 30s for chemical polishing, then ultrasonically cleaned in water and ethanol for 15min, and then cleaned the Ti grid with deionized water immediately, and dried for later use. Add 30mL deionized water and 27μL hydrofluoric acid (≥38wt%) to 100mL polytetrafluoroethylene substrate and mix well, then put the dry metal Ti mesh through chemical polishing into it, and the polytetrafluoroethylene substrate Put it into a high-pressure reactor and heat it with water at 180°C for 4 hours. After the reaction is completed, cool it down to room temperature, rinse the surface with deionized water, and let it dry naturally. Calcined at 450°C for 3h in an air atmosphere with a heat...

Embodiment 2

[0041] Compared with Example 1, most of them are the same, except in this example:

[0042] Replace the metal Ti mesh with a metal Ti plate to get {001}TiO 2 / Ti(foil) electrode material. The {001}TiO obtained in case 1 based on the Ti network 2 / Ti(mesh) and {001}TiO 2 / Ti(foil) under simulated sunlight, the photoelectric catalytic degradation of dimethyl phthalate (DMP) experiment, the specific steps are as follows:

[0043] The experiment of photocatalytic degradation of DMP was carried out in a cuboid quartz degradation cell with a volume of 50ml, using a three-electrode degradation system, with {001}TiO 2 / Ti foil (or {001}TiO 2 / Ti mesh) the photoelectrode is the working electrode, the platinum sheet is the counter electrode, the saturated calomel electrode is the reference electrode, the distance between the working electrode and the counter electrode is 3cm, and the effective photoelectrode area is 3.5×4.5cm 2 . Use 0.1mol·L -1 Sodium sulfate deionized water sol...

Embodiment 3

[0045] A Highly Exposure {001}TiO Supported by Carbon Quantum Dots 2 / Ti photoelectrode (CQDs-{001}TiO 2 / Ti) preparation method, specifically comprises the following steps:

[0046] (1) Cut the metal Ti mesh into 1.5×1.5cm 2 Size, in chemical polishing solution (volume ratio: HNO 3 :HF:H 2 (O=5:1:25) soaked in 30s for chemical polishing, then ultrasonically cleaned in water and ethanol for 15min, and then cleaned the Ti grid with deionized water immediately, and dried for later use. Add 30mL deionized water and 27μL hydrofluoric acid (≥38wt%) to 100mL polytetrafluoroethylene substrate and mix well, then put the dry metal Ti mesh through chemical polishing into it, and the polytetrafluoroethylene substrate Put it into a high-pressure reactor and heat it with water at 180°C for 4 hours. After the reaction is completed, cool it down to room temperature, rinse the surface with deionized water, and let it dry naturally. Calcined at 450°C for 3h in an air atmosphere with a hea...

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Abstract

The invention relates to a three-dimensional TiO2 photoelectrode with efficient visible light response as well as construction and application thereof. A preparation process of the photoelectrode comprises the following steps: firstly performing in-situ growing of {001}TiO2 microspheres with nearly 100% exposed {001} crystal faces on a titanium mesh through hydrothermal reaction, with the titaniummesh being adopted as a titanium source and hydrofluoric acid being adopted as an end-capping reagent; and loading CQDs on the surfaces of the {001}TiO2 microspheres through hydrothermal treatment toobtain a CQDs-{001}TiO2/Ti photoelectrode with a three-dimensional structure, namely a target product. Compared with the prior art, the prepared three-dimensional TiO2 photoelectrode has efficient and very stable photoelectrocatalysis performance and the like under visible light.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalytic oxidation materials, and relates to a three-dimensional TiO with high-efficiency visible light response 2 Photoelectrodes and their construction and applications. Background technique [0002] With the development of human civilization, environmental issues have become a global issue, in which the safety of water environment directly affects the survival and development of human beings. Both dyes and endocrine disruptors are ubiquitous environmental pollutants in the water environment. People ingest these pollutants through food and skin contact, which pose potential threats to the body. Therefore, their efficient removal is of great significance. [0003] Bisphenol A (Bisphenol A, BPA) is a class of endocrine disruptors that are potentially harmful to human health. It is one of the raw materials for industrial synthetic plastics. It has an estrogen-like effect, which can cause en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C25B3/02C25B11/06C25B11/10C02F1/461C02F1/72C02F101/34C02F101/38C25B3/23
CPCC02F1/30C02F1/46109C02F1/4672C02F2001/46133C02F2101/345C02F2101/34C02F2101/38C02F2101/40C02F2305/10C25B3/23C25B11/051C25B11/091
Inventor 张亚男牛琼燕黎雷赵国华
Owner TONGJI UNIV
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