Method for preparing large-specific-surface-area mesoporous TiO2 by using SiO2 in biomass

A high specific surface area, biomass technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of difficult parameter control and complicated process flow, and achieve the effect of wide source of raw materials, simple process, and expanded production routes

Active Publication Date: 2016-06-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods have their own deficiencies, such as complex process flow, difficult parameter control, and a certain degree of environmental problems. Therefore, it is urgent to further improve the preparation process of mesoporous titanium dioxide and develop a high-quality, high-performance, environmentally friendly Preparation method of mesoporous titanium dioxide

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  • Method for preparing large-specific-surface-area mesoporous TiO2 by using SiO2 in biomass

Examples

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Effect test

Embodiment 1

[0031] A kind of utilization of SiO in biomass 2 Preparation of high specific surface area mesoporous TiO 2 method, including the following steps:

[0032] (1) Mesoporous SiO 2 Preparation: Take 10 grams of Northeast rice husk, use 120 grams of 0.2% hydrochloric acid solution in a slightly boiling state (about 100°C) for 2 hours, filter while hot and wash with distilled water until neutral, and dry at 150°C to a constant weight, then placed in a muffle furnace, set the heating rate at 5°C / min, and oxidized and pyrolyzed at a high temperature of 700°C for 2 hours, and cooled naturally to room temperature to obtain mesoporous SiO 2 ;

[0033] (2) Preparation of silicon-titanium composite: take 0.2 gram of mesoporous SiO prepared in step (1) 2 , with 20 grams of 5% sodium hydroxide solution dissolved at 80 ° C for 24 hours; then at 25 ° C, with a mass fraction of 10% TiOSO 4 The solution was titrated to neutrality, filtered after aging for 24 hours, and dried to constant wei...

Embodiment 2

[0037] A kind of utilization of SiO in biomass 2 Preparation of high specific surface area mesoporous TiO 2 method, including the following steps:

[0038] (1) Mesoporous SiO 2Preparation: Take 10 grams of Northeast rice husk, use 120 grams of 0.2% hydrochloric acid solution in a slightly boiling state (about 100°C) for 2 hours, filter while hot and wash with distilled water until neutral, and dry at 150°C to a constant weight, then placed in a muffle furnace, set the heating rate at 5°C / min, and oxidized and pyrolyzed at a high temperature of 700°C for 2 hours, and cooled naturally to room temperature to obtain mesoporous SiO 2 ;

[0039] (2) Preparation of silicon-titanium composite: take 0.2 gram of mesoporous SiO prepared in step (1) 2 , with 10 grams of 10% potassium hydroxide solution at 80°C for 24 hours; then at 25°C, with a mass fraction of 20% TiOSO 4 The solution was titrated to neutrality, filtered after aging for 36 hours, and dried to constant weight at 80°C...

Embodiment 3

[0043] A kind of utilization of SiO in biomass 2 Preparation of high specific surface area mesoporous TiO 2 method, including the following steps:

[0044] (1) Mesoporous SiO 2 Preparation: Take 10 grams of Northeast rice husk, use 120 grams of 0.2% hydrochloric acid solution in a slightly boiling state (about 100°C) for 2 hours, filter while hot and wash with distilled water until neutral, and dry at 150°C to a constant weight, then placed in a muffle furnace, set the heating rate at 5°C / min, and oxidized and pyrolyzed at a high temperature of 700°C for 2 hours, and cooled naturally to room temperature to obtain mesoporous SiO 2 ;

[0045] (2) Preparation of silicon-titanium composite: take 0.5 gram of mesoporous SiO prepared in step (1) 2 , with 10 grams of 10% sodium hydroxide solution dissolved at 80 ° C for 24 hours; then at 25 ° C, with a mass fraction of 20% TiOSO 4 The solution was titrated to neutrality, filtered after aging for 24 hours, and dried to constant we...

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Abstract

The invention belongs to the technical field of inorganic functional materials and discloses a method for preparing large-specific-surface-area mesoporous TiO2 by using SiO2 in biomass. The method comprises: (1), dissolving mesoporous SiO2 with strong base solution to obtain a dissolved solution; at room temperature, dropwise adding titanium precursor solution into the dissolved solution until pH of the dissolved solution is neutral, ageing, filtering, and drying to constant weight to obtain SiO2/TiO2 composite; (2), firing the SiO2/TiO2 composite, and cooling to obtain high temperature treated composite; (3), soaking the high temperature treated composite with strong base solution, washing with water until neutrality, and separating and drying to constant weight to obtain mesoporous TiO2. SiO2 in TiOSO4 and rice hull is used as a raw material that is widely resourceful and low in price and easy to obtain and is economical and environment-friendly; the method is simple and convenient to perform, and the prepared mesoporous TiO2 has large specific surface area.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, in particular to a method of utilizing SiO in biomass raw materials 2 Preparation of high specific surface area mesoporous TiO 2 Methods. Background technique [0002] Sewage discharge from the three major sources of industry, agriculture and life is the main cause of water pollution, and at the same time poses a serious threat to human health. Today, when we are vigorously advocating low-carbon life and healthy life, effective treatment of water pollution is harmful to the environment. It is of great significance to the sustainable development of economy and society. Scientists have done a lot of research on how to effectively deal with these pollutants. Compared with physical adsorption and bioremediation, photocatalytic technology, as an efficient green technology, is recognized as an ideal environmental purification technology. [0003] Mesoporous titanium dioxide ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047
CPCC01G23/047C01P2006/12
Inventor 蔡元浩黄浩鑫王卫星丁子先陈碧玉
Owner SOUTH CHINA UNIV OF TECH
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