A semi-continuous process for the synthesis of nanosize TiO2 powders and their use as photocatalysts

被引：100

作者：

Znaidi, L ^{[1
]}

Séraphimova, R ^{[1
]}

Bocquet, JF ^{[1
]}

Colbeau-Justin, C ^{[1
]}

Pommier, C ^{[1
]}

机构：

[1] Univ Paris 13, Lab Ingn Mat & Hautes Press, CNRS UPR 1311, F-93430 Villetaneuse, France

来源：

MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 5-6期

关键词：

oxides; nanostructures; sol-gel chemistry; catalytic properties;

D O I：

10.1016/S0025-5408(00)00482-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A semi-continuous process has been developed for the synthesis of TiO2 powders: a sol-gel reaction, using titanium isopropoxide as precursor and acetylacetone as chelating agent, followed by supercritical drying is performed. The obtained powders have been characterized by X-ray diffraction, SEM, TEM, BET method and OH surface groups measurements. The recovered solids are always crystallized in the anatase structure with particle size ranging from 8 to 13 nm. Surface at ea and OH surface groups density are around 100 m(2).g(-1) and 0.6 x 10(-3) mol .g(-1) respectively. The photocatalytic activity of the elaborated powders has been studied following the degradation of phenol and compared to that of two commercial powders (P25 Degussa and Acros). (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：811 / 825

页数：15

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