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Photocatalyst and application thereof to efficient photocatalysis degradation on different gas phase organic contaminants

A technology of organic pollutants and photocatalysts, applied in physical/chemical process catalysts, chemical/physical processes, chemical instruments and methods, etc., can solve the problem of poor adsorption capacity of organic pollutants, difficult gas degradation, and weak catalytic activity. problem, to achieve the effect of easy industrial production, good photocatalytic performance, and low selectivity

Inactive Publication Date: 2019-05-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves a series of problems that are currently difficult to solve, such as poor adsorption capacity of conventional catalysts for organic pollutants, weak catalytic activity, incomplete gas degradation, and residues.

Method used

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  • Photocatalyst and application thereof to efficient photocatalysis degradation on different gas phase organic contaminants
  • Photocatalyst and application thereof to efficient photocatalysis degradation on different gas phase organic contaminants
  • Photocatalyst and application thereof to efficient photocatalysis degradation on different gas phase organic contaminants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. Add 50.00 mL of absolute ethanol to the three-necked flask, place it in an ice-water bath and stir for 20 minutes. Under the condition of stirring, slowly add 2.00 mL of titanium tetrachloride to the three-necked flask, and then take 0.50 mL of water with a pipette gun Add it and continue to stir until the yellow transparent solution;

[0033] B. Weigh 4.00g of diatomaceous earth and place it in a 100mL reaction kettle, transfer the yellow transparent solution obtained in step A to the reaction kettle, stir the yellow transparent solution and diatomite in the reaction kettle evenly, and put it into an oven at 200 ℃ reaction 12h;

[0034] C. After the reaction is completed, wash with absolute ethanol and deionized water for 4 times, rinse until the pH is about 7, and then dry in an oven at 80°C for 10 hours to obtain a photocatalyst.

[0035] The photocatalyst prepared by the above method was subjected to photocatalytic degradation. Weigh 0.05 g of the photocatalyst...

Embodiment 2

[0038] A. Add 50.00 mL of absolute ethanol to the three-necked flask, place it in an ice-water bath and stir for 20 minutes. Under the condition of stirring, slowly add 2.00 mL of titanium tetrachloride to the three-necked flask, and then take 0.50 mL of water with a pipette gun Add it and continue to stir until the yellow transparent solution;

[0039] B. Weigh 4.00g of diatomaceous earth and place it in a 100mL reaction kettle, transfer the yellow transparent solution obtained in step A to the reaction kettle, stir the yellow transparent solution and diatomite in the reaction kettle evenly, and put it into an oven at 200 ℃ reaction 12h;

[0040] C. After the reaction is completed, wash with absolute ethanol and deionized water for 4 times, rinse until the pH is about 7, and then dry in an oven at 80°C for 10 hours to obtain a photocatalyst.

[0041] The photocatalyst prepared by the above method was subjected to photocatalytic degradation. Weigh 0.05 g of the photocatalyst...

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Abstract

The invention discloses a photocatalyst and application thereof to efficient photocatalysis degradation on different gas phase organic contaminants. The photocatalyst is a composite material obtainedthrough in situ growth of titanium dioxide onto kieselguhr. A preparation method comprises the following step that with titanium tetrachloride as a titanium source, porous kieselguhr as a carrier, andabsolute ethyl alcohol as a solvent, a one-step hydrothermal method is performed to prepare the photocatalyst. When the photocatalyst is applied to the treatment of different gas phase organic contaminants, the photocatalysis efficiency is high; the process is simple; the cost is low; the problem of secondary pollution is solved. A series of problems of a conventional catalyst such as poor adsorption capability on the organic contaminants, low catalysis activity, unthorough and difficult gas degradation and residue of organic contaminants which are difficult to solve in the prior art are solved by the invention. The product has potential application values in directions of photocatalysis application, gas phase organic contaminant treatment, environment optimization, particularly indoor gas phase organic contaminant treatment and the like; the photocatalyst is hopeful to realize industrial production and to be applied to life environment.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic degradation of organic matter, in particular to a photocatalyst and its application to efficient photocatalytic degradation of different gas phase organic pollutants. Background technique [0002] With the acceleration of industrialization and urbanization, the problem of environmental pollution has become more and more serious. The main pollution produced in the process of industrialization is the three industrial wastes—waste water, waste gas, and waste residue, which bring enormous pressure to the environment. Among them, industrial waste gas refers to various gases that are no longer used in the process of industrial production, including smoke, odor, irritating gas and other harmful gases. It has caused great pollution to the human living environment. In addition to the outdoor environmental pollution problem of industrial waste gas, the indoor environmental pollution problem cannot ...

Claims

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Application Information

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IPC IPC(8): B01J21/08B01D53/86B01D53/72
Inventor 杨俊佼刘雪飞
Owner BEIJING UNIV OF CHEM TECH
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