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Process for preparing surface bonded TiO2/SiO2 photocatalyst

A photocatalyst and bonding technology, which is applied in the field of preparation of surface-bonded TiO2/SiO2 photocatalyst, can solve the problems of easy detachment of titanium oxide and the like

Inactive Publication Date: 2003-10-29
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

Under normal conditions, the immobilized titanium oxide is more active than the titanium oxide powder prepared by the same method, but there is no chemical bond between some titanium oxide and the carrier, and the titanium oxide is easy to fall off

Method used

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  • Process for preparing surface bonded TiO2/SiO2 photocatalyst

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Embodiment Construction

[0008] The technical characteristics and advantages of the present invention can be seen through the embodiments and application examples given below.

[0009] 1. Surface-bonded TiO 2 / SiO 2 Structural characterization of photocatalysts

[0010] The volume ratio of tetrabutyl titanate to cyclohexane is 1:3. The dry porous silica gel is impregnated in the cyclohexane solution of tetrabutyl titanate to react for 15 hours, and then the cyclohexane is evaporated at 40°C. The sample After drying at 100°C, it was calcined in air at 400°C for 5 hours, at which point tetrabutyl titanate was oxidized to TiO 2 , cooled, loaded on the surface of porous silica gel through Ti-O-Si bonds, and obtained surface-bonded TiO 2 / SiO 2 catalyst of light. Because TiO 2 Loading on the surface of porous silica gel is a well-known technology, and this embodiment will not describe it in detail here.

[0011] TiO prepared above 2 / SiO 2 Catalyst, the results of XRD characterization show that te...

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Abstract

A surface bonded TiO2 / SiO2 photocatalyst is prepared through impregnating porous silica gel in the solution of tert-butyl titanate in cyclodexane, reaction for 10-20 hr, evaporating cyclodexane at 50deg.c, drying at 80-120 deg.C, calcining at 350-500 deg.C for 4-8 hr, cooling to obtain nano-class anatase-type titatium oxide, carrying it on porous silica gel by Ti-O-Si bonds.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst, in particular to a surface-bonded TiO 2 / SiO 2 Preparation method of photocatalyst. Background technique [0002] A large number of research results have proved that titanium oxide heterogeneous photocatalysis has become a promising technology in the field of environmental purification. Titanium oxide is capable of inorganicizing most organic pollutants in air and water, and has great potential in deep sterilization. So far, there is still no photocatalyst superior to titanium oxide. The photocatalytic activity and chemical stability of titanium oxide have attracted people's attention. Titanium oxide powder becomes an obstacle to practical application. Recently, a two-part study has emerged to address this question. One branch is mainly to highly disperse titanium oxide nanoparticles on porous materials; the other branch is to prepare titanium oxide thin films, mostly through titani...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/02
Inventor 胡春邢核郝郑平
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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