Low temperature preparation of anatase TiO2-coated activated carbon

被引：107

作者：

Ao, Yanhui ^{[1
,2
]}

Xu, Jingjing ^{[1
,2
]}

Fu, Degang ^{[1
,2
]}

Shen, Xunwei ^{[1
,2
]}

Yuan, Chunwei ^{[1
,2
]}

机构：

[1] Southeast Univ, Sch Chem & Chem Engn, Nanjing 210096, Peoples R China

[2] Southeast Univ, Dept Biomed Engn, Key Lab Mol & Biomol Elect, Nanjing 210096, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 312卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; titania; activated carbon; phenol; composite photocatalyst;

D O I：

10.1016/j.colsurfa.2007.06.039

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Anatase titania sols were synthesized at low temperature (i.e. 75 degrees C by hydrolysis of titaniumn-butoxide in abundant acidic aqueous solution. The prepared TiO2 nanoparticles were loaded on activated carbon in a rotatory evaporator under vacuum, and then the composite photocatalyst was employed for the removal of phenol from water. The apparent rate constant and quantum yield of the composite photocatalyst enhanced 5 and 2.5 times, respectively, compared to single phase titania. The activated carbon with strong adsorbent activity provided sites for the adsorption of phenol, and the adsorbed phenol migrated continuously onto the surface of TiO2 particles which were located mainly at the exterior surface of the activated carbon. Some phenol remained adsorbed on the catalyst when no traces of phenol were detected in the water. This adsorbed phenol could be degraded by illuminated titania while maintaining UV-irradiation. The photocatalyst was used for six cycles with degraded rate of phenol still higher than 80%. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：125 / 130

页数：6

共 24 条

[1] Deposition of anatase on the surface of activated carbon [J].