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Multi-element co-doped visible-light-induced photocatalyst

A co-doping, visible light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult separation from treated water, restricting practical applications, etc.

Pending Publication Date: 2021-02-23
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] TiO 2 It can only have a photoexcitation effect in the ultraviolet range, and its ultrafine powder structure makes it difficult to separate from the treated water, which restricts its practical application, and TiO 2 Doped with different elements, the photocatalytic efficiency is limited

Method used

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  • Multi-element co-doped visible-light-induced photocatalyst

Examples

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Effect test

preparation example Construction

[0022] The preparation method of the visible light catalyst with the magnetic separation function is as follows:

[0023] 1. Polish the titanium sheet (25mm×40mm) with 180#, 600#, and 1000# sandpaper in turn until it shows a metallic luster, put the polished titanium sheet into absolute ethanol and deionized water for 10 minutes, and then let it dry naturally . The configuration contains a mass fraction of 0.4% NH 4 F and a volume fraction of 1% H 2 The ethylene glycol mixture of O is used as the electrolyte, the titanium sheet is used as the anode, and the steel plate is used as the cathode. The electrolytic cell experiment is carried out under the condition of a constant voltage of 30v for 1h, accompanied by magnetic stirring. After the reaction, the titanium sheet is taken out and used a large amount of Rinse with deionized water, air-dry naturally, and place in a muffle furnace for high-temperature simmering treatment. The heating rate was 5°C / min. When the maximum temp...

Embodiment 1

[0027] Example 1 TNA Visible Light Catalytic Degradation of Bisphenol A Solution

[0028] Reaction target solution volume: 100mL

[0029] Reaction target solution: bisphenol A concentration is 4mg / L

[0030] pH 7

[0031] Catalyst dosage is 10cm 2

[0032] Illuminate for 120min under simulated visible light (CEL-HXUV300, Beijing Zhongjiao Jinyuan, 200-800nm, 300W)

[0033] The removal rate of bisphenol A solution before and after treatment is shown in Table 1.

[0034] Table 1 Example 1 Visible light catalytic degradation bisphenol A solution removal rate results

[0035]

Embodiment 2

[0036] Example 2 N-TNA visible light catalytic degradation of bisphenol A solution

[0037] Reaction target solution volume: 100mL

[0038] Reaction target solution: bisphenol A concentration is 4mg / L

[0039] pH 7

[0040] Catalyst dosage is 10cm 2

[0041] Illuminate for 120min under simulated sunlight (CEL-HXUV300, Beijing Zhongjiao Jinyuan, 200-800nm, 300W)

[0042] The removal rate of bisphenol A solution before and after treatment is shown in Table 2.

[0043] Table 2 Example 2 Visible light catalytic degradation bisphenol A solution removal rate results

[0044]

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Abstract

The invention relates to a multi-element co-doped visible-light-induced photocatalyst, which comprises the following steps: 1) preparing a titanium dioxide nanotube array; 2) preparing N-doped titanium dioxide nanotubes; 3) preparing C and N co-doped nitrogen-modified titanium dioxide nanotubes; and 4) preparing ferric oxide and carbon nitride co-doped nitrogen-modified titanium dioxide nanotubes.The photocatalyst has the functions of visible light excitation and catalytic degradation of organic pollutants, and also has the functions of easy separation from water and easy recovery.

Description

technical field [0001] The invention belongs to the technical field of treating organic polluted sewage, in particular to a visible light catalyst co-doped with various elements. Background technique [0002] The continuous development of society promotes the development of the chemical industry, but industrial wastewater is also increasing in the process of development. In recent years, a large number of researches on the treatment methods of refractory organic wastewater have been carried out at home and abroad. Among them, compared with traditional water treatment methods, advanced oxidation technology has the advantages of good treatment effect, fast speed, no secondary pollution, and wide application range. been widely concerned. However, most advanced oxidation technologies have the disadvantage of high energy consumption and material consumption, and are restricted by economic factors in practical application. Therefore, the development of new economical and economi...

Claims

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Application Information

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IPC IPC(8): B01J27/28C02F1/30C02F101/34
CPCB01J27/28C02F1/30C02F2101/345C02F2305/10B01J35/33B01J35/39
Inventor 杨春维孔祥权李金英汤茜孙玉伟
Owner JILIN NORMAL UNIV
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