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Pd/TOC photocatalyst, Pd/CdS/TOC photocatalyst, preparation method and application thereof

A photocatalyst and high-quality technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low degradation efficiency and insufficient utilization of visible light, and achieve high degradation efficiency, Reduce the chance of recombination, the effect of high hydrothermal stability

Active Publication Date: 2019-06-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a Pd / TOC photocatalyst and its preparation method and application, overcome the problems and defects of low degradation efficiency in the prior art, and have stronger photocatalyst to 2,4-dichlorophenol Catalytic performance
[0006] The second object of the present invention is to provide a Pd / CdS / TOC photocatalyst and its preparation method and application, to overcome the problems and defects of low degradation efficiency and insufficient utilization of visible light in the prior art, and to 2,4- Dichlorophenol has strong photocatalytic properties

Method used

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  • Pd/TOC photocatalyst, Pd/CdS/TOC photocatalyst, preparation method and application thereof
  • Pd/TOC photocatalyst, Pd/CdS/TOC photocatalyst, preparation method and application thereof
  • Pd/TOC photocatalyst, Pd/CdS/TOC photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of titanyl cluster TOC: Add 20 mL of ethylene glycol to 1.0724 g of pivalic acid, add 1.7 mL of tetrabutyl titanate and continue stirring at 100 ° C for 24 h, centrifuge, wash with THF three times, and dry for 12 h , get TOC.

[0039] (2) Preparation of Pd / TOC photocatalyst: Take 0.05gTOC prepared in step (1) and add it to 15mL water, add palladium dichloride and stir for 10mim, then irradiate with ultraviolet light for 30min, finally get the following Figure 5 The Pd / TOC photocatalyst shown; wherein the mass of palladium element is 0.5% of the mass of TOC.

[0040] Take 0.02g of the photocatalyst prepared in this example and add it to 30mL of 15mg / L 2,4-dichlorophenol solution, stir in the dark for 30 minutes to reach adsorption equilibrium; Obtain the visible light part of the xenon lamp, pass air into the sample, and conduct photocatalytic experiments; such as figure 1 As indicated, every 20 min, 3 ml samples were taken for product analysis by liqu...

Embodiment 2

[0043](1) Preparation of titanyl cluster TOC: Add 20 mL of ethylene glycol to 1.0724 g of pivalic acid, add 1.7 mL of tetrabutyl titanate and continue stirring at 100 ° C for 24 h, wash with ethanol three times after centrifugation, and dry for 12 h , get TOC.

[0044] (2) Preparation of Pd / TOC photocatalyst: Take 0.05gTOC prepared in step (1) and add it to 15mL water, add palladium nitrate and carry out ultrasonic treatment for 10min, then stir for 10mim, then irradiate with ultraviolet light for 30min, and finally get the following Figure 5 Shown Pd / TOC photocatalyst; Wherein the mass of palladium element is 1.5% of TOC mass.

[0045] Take 0.02g of the photocatalyst prepared in this example and add it to 30mL of 15mg / L 2,4-dichlorophenol solution, stir in the dark for 30 minutes to reach adsorption equilibrium; Obtain the visible light part of the xenon lamp, pass air into the sample, and conduct photocatalytic experiments; such as figure 1 As indicated, every 20 min, 3 m...

Embodiment 3

[0048] (1) Preparation of titanyl cluster TOC: Add 20 mL of ethylene glycol to 1.0724 g of pivalic acid, add 1.7 mL of tetrabutyl titanate and continue stirring at 100 ° C for 24 h, centrifuge, wash with THF three times, and dry for 12 h , get TOC.

[0049] (2) Preparation of Pd / TOC photocatalyst: Take 0.05gTOC prepared in step (1) and add it to 10mL water, add palladium dichloride and stir for 5mim, then irradiate with ultraviolet light for 10min, finally get the following Figure 5 The Pd / TOC photocatalyst shown; wherein the mass of palladium element is 1% of the mass of TOC.

[0050] Take 0.02g of the photocatalyst prepared in this example and add it to 30mL of 15mg / L 2,4-dichlorophenol solution, stir in the dark for 30 minutes to reach adsorption equilibrium; Obtain the visible light part of the xenon lamp, pass air into the sample, and conduct photocatalytic experiments; such as figure 1 As indicated, every 20 min, 3 ml samples were taken for product analysis by liquid ...

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Abstract

The invention discloses a Pd / TOC photocatalyst, a Pd / CdS / TOC photocatalyst, a preparation method and an application thereof. The Pd / TOC photocatalyst is prepared by taking TOC as a load object and loading Pd on TOC. The Pd / CdS / TOC photocatalyst is prepared by further loading CdS on the basis of the Pd / TOC photocatalyst. Various photocatalysts prepared according to the invention are all green and environment-friendly materials; no new pollution is generated after degradation of the photocatalysts; degradation efficiency is high; applicable environment is extensive; the photocatalysts can be used for treating wastewater; the efficiency of degrading 2,4-dichlorophenol is high; the popularization and application of photocatalysts have huge advantages.

Description

technical field [0001] The invention belongs to the field of photocatalysts, and in particular relates to a Pd / TOC photocatalyst, a Pd / CdS / TOC photocatalyst and a preparation method and application thereof. Background technique [0002] 2,4-Dichlorophenol is widely used in the production of pesticides 2,4-D and 2,4,5-T. At the same time, 2,4-dichlorophenol is still an important chemical product. In recent years, it is used as a solvent, pesticide and pharmaceutical intermediate. With the increase of production and usage, the amount of 2,4-dichlorophenol entering the environment also increases accordingly, and the pollution hazard of 2,4-dichlorophenol in the environment is becoming more and more serious. However, 2,4-dichlorophenol has the characteristics of high toxicity, persistence, fluidity and accumulation, which seriously affects our living environment. It is toxic to water fleas, zebrafish, salmon, rabbits, rats and humans, and will interfere with the endocrine syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045C02F1/30C02F101/34
Inventor 李宇亮段明昊秦昉徐晓彤周鲁平
Owner CHANGAN UNIV
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