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Carbon-loaded titanium dioxide composite catalyst and preparation method and application thereof

A composite catalyst and titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, water treatment of special compounds, etc., to achieve the effects of high reusability, rapid degradation, and high stability

Pending Publication Date: 2021-07-23
XINJIANG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the preparation of carbon-supported titanium dioxide composite catalysts using polysaccharide aerogels prepared by coordination crosslinking as precursors.

Method used

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  • Carbon-loaded titanium dioxide composite catalyst and preparation method and application thereof
  • Carbon-loaded titanium dioxide composite catalyst and preparation method and application thereof
  • Carbon-loaded titanium dioxide composite catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: The carbon-supported titanium dioxide composite catalyst is obtained according to the following steps: the first step, sodium alginate is dispersed in distilled water and soaked and stirred to obtain an aqueous solution of sodium alginate with a mass concentration of 2%, which is added to alginic acid Add absolute ethanol to the sodium solution, and then add dilute hydrochloric acid to adjust the pH value to 2 to 3 to obtain mixture 1, wherein 5ml of absolute ethanol is added to each gram of sodium alginate; the second step is to add Add tetrabutyl titanate dropwise for stirring, then undergo ultrasonication and aging in sequence to obtain mixture 2, and freeze and dry mixture 2 in turn to obtain titanium alginate airgel, wherein tetrabutyl titanate and seaweed The mass ratio of sodium alginate is 10 to 20:1; in the third step, the titanium alginate airgel is calcined under a nitrogen atmosphere to obtain a carbon-supported titanium dioxide composite cataly...

Embodiment 2

[0033] Embodiment 2: As an optimization of the above embodiment, in the first step, the G / M ratio of sodium alginate is 0.3 to 0.5.

Embodiment 3

[0034] Embodiment 3: As an optimization of the above embodiment, in the first step, the soaking time is 6h to 8h, and the stirring time is 30min to 35min.

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Abstract

The invention relates to the technical field of composite catalyst materials, in particular to a carbon-loaded titanium dioxide composite catalyst and a preparation method and application thereof. The preparation method comprises the steps that tetrabutyl titanate serves as a titanium source, titanium alginate gel is synthesized through coordination crosslinking of Ti < 4 + > and sodium alginate, titanium alginate aerogel is obtained through freezing and drying, under the nitrogen atmosphere, calcining is performed at high temperature to obtain the uniformly dispersed three-dimensional porous carbon-loaded titanium dioxide composite catalyst. The carbon-loaded titanium dioxide composite catalyst is environment-friendly, economical and effective, can quickly degrade organic pollutants in dye wastewater, has a good degradation effect, has the characteristics of good photocatalytic activity, high stability and reusability, and provides a new idea for taking polysaccharide as a carbon carrier.

Description

technical field [0001] The invention relates to the technical field of composite catalyst materials, and relates to a carbon-supported titanium dioxide composite catalyst and a preparation method and application thereof. Background technique [0002] In the 21st century, human society is developing rapidly, and has made great progress in technology and humanities. However, the problems of contemporary resources and ecological environment are becoming more and more prominent, which poses a major risk to the sustainability of the ecosystem and human health. In recent years, semiconductor heterogeneous photocatalysis technology, as an environmentally friendly new technology, has received extensive attention in the fields of environmental governance, new energy development, and organic synthesis. Especially in terms of environmental governance, photocatalytic technology is gradually becoming a supplement and improvement to traditional pollution control technologies. Due to its ...

Claims

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Application Information

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IPC IPC(8): B01J21/18C02F1/30C02F101/30C02F101/38
CPCB01J21/18C02F1/30C02F2101/308C02F2305/10C02F2101/40B01J35/39
Inventor 李德强孟玉洁李君
Owner XINJIANG AGRI UNIV
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