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Preparation method of titanium dioxide particle electrode loaded with high {001} crystal face

A technology of titanium dioxide and particle electrodes, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. Low activity and other problems, to achieve the effect of reducing processing time, improving electrocatalytic oxidation activity, and promoting degradation

Active Publication Date: 2022-03-11
QUANZHOU INST FOR ENVIRONMENTAL PROTECTION IND NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Anatase TiO 2 Crystals have important application value in photocatalytic water splitting and photocatalytic degradation of organic pollution, but there are few studies on the application of electrocatalytic oxidation of organic pollutants. The main reason is that TiO 2 The crystal surface is usually composed of thermodynamically stable {101} facets (94%), with only a small amount of {001} facets, resulting in poor electrical conductivity and low electrocatalytic activity

Method used

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Examples

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preparation example Construction

[0025] Its preparation method comprises the following steps:

[0026] Step 1, activated carbon pretreatment: boil powdered activated carbon and dilute hydrochloric acid solution at 100°C for 2 hours, cool and filter, wash with deionized water until the pH of the filtrate is neutral, and then vacuum dry at 110°C for 24 hours;

[0027] Step 2, hydrothermal reaction: Dissolve titanium tetrafluoride in deionized water, add 0.1mol / L hydrochloric acid solution and sodium chloride solid particles, stir evenly, then add the powdered activated carbon obtained in step 1, mix and stir evenly Pour it into a reaction kettle with polytetrafluoroethylene, and treat it at 200°C for 2-6h, wherein the molar ratio of titanium tetrafluoride, hydrochloric acid solution, and sodium chloride is 3-5:1:80, tetrafluoride The mass ratio of titanium to powdered activated carbon is 1-2:30;

[0028] Step 3, high-temperature heat treatment: filter the mixed solution obtained in step 2, wash with deionized ...

Embodiment 1

[0033] A titanium dioxide particle electrode loaded with a high {001} crystal plane is composed of granular activated carbon and titanium dioxide with a high {001} crystal plane loaded on the granular activated carbon, and the crystal form of the titanium dioxide is anatase.

[0034] Its preparation method comprises the following steps:

[0035] Step 1, activated carbon pretreatment: boil powdered activated carbon and dilute hydrochloric acid solution at 100°C for 2 hours, cool and filter, wash with deionized water until the pH of the filtrate is neutral, and then vacuum dry at 110°C for 24 hours;

[0036] Step 2, hydrothermal reaction: Dissolve 0.3g of titanium tetrafluoride in 100ml of deionized water, add 8ml of hydrochloric acid solution with a concentration of 0.1mol / L, 3.77g of sodium chloride solid particles, stir evenly, and then add 9g of step 1 for treatment The powdered activated carbon obtained was mixed and stirred evenly and poured into a reaction kettle with pol...

Embodiment 2

[0043] A titanium dioxide particle electrode loaded with a high {001} crystal plane is composed of granular activated carbon and titanium dioxide with a high {001} crystal plane loaded on the granular activated carbon, and the crystal form of the titanium dioxide is anatase.

[0044] Its preparation method comprises the following steps:

[0045]Step 1, activated carbon pretreatment: boil powdered activated carbon and dilute hydrochloric acid solution at 100°C for 2 hours, cool and filter, wash with deionized water until the pH of the filtrate is neutral, and then vacuum dry at 110°C for 24 hours;

[0046] Step 2, hydrothermal reaction: Dissolve 0.3g of titanium tetrafluoride in 100ml of deionized water, add 8ml of hydrochloric acid solution with a concentration of 0.1mol / L, 3.77g of sodium chloride solid particles, stir evenly, and then add 9g of step 1 for treatment The powdered activated carbon obtained was mixed and stirred evenly and poured into a reaction kettle with poly...

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Abstract

The invention relates to a preparation method of a titanium dioxide particle electrode loaded with a high {001} crystal face, and the particle electrode is composed of granular active carbon and titanium dioxide loaded on the granular active carbon and having the high {001} crystal face. Comprising the following steps: pretreatment of activated carbon, hydrothermal reaction of a mixture of powdered activated carbon and titanium tetrafluoride, high-temperature heat treatment, extrusion forming of granular activated carbon and the like, titanium tetrafluoride is adopted as a titanium source, and titanium dioxide can stably grow a {001} crystal face with high surface energy in a fluorine environment by utilizing relatively high binding energy between fluorine and titanium, so that the surface of the titanium dioxide is uniform, and the surface of the titanium dioxide is uniform. When the prepared particle electrode is applied to a three-dimensional electrolysis system, the electrocatalytic oxidation activity can be remarkably improved, degradation of biorefractory organic pollutants is promoted, the treatment time can be shortened, and the service life can be prolonged; a fixed bed of an up-flow type three-dimensional electrode reactor is filled with the mixed solution for an electrolytic oxidation experiment of electrolyzing the acid orange 7, and the removal rate of the acid orange 7 can reach 91.2% after the acid orange 7 is electrolyzed for 5 min.

Description

technical field [0001] The invention belongs to the field of particle electrode preparation, and in particular relates to a method for preparing a titanium dioxide particle electrode loaded with high {001} crystal planes. Background technique [0002] my country's rapid industrial development has greatly promoted the development of the national economy and the improvement of material civilization, but at the same time, the direct discharge or substandard discharge of wastewater from industrial production has not only caused serious environmental pollution, but even endangered people's health. . According to statistics from the Ministry of Ecology and Environment of China, the discharge of industrial wastewater in my country in 2018 was still as high as 17.5 billion tons, including papermaking, printing and dyeing, pharmaceutical and chemical industries. Industrial wastewater has the characteristics of large amount of water, complex components, and contains various organic po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/30
CPCC02F1/46114C02F1/4672C02F2001/46133C02F2101/30
Inventor 陈继锡王永峰邓东阳胡大波季荣
Owner QUANZHOU INST FOR ENVIRONMENTAL PROTECTION IND NANJING UNIV
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