文献类型：期刊文献

英文题名：Anatase grain loaded brookite nanoflower hybrid with superior photocatalytic activity for organic degradation

作者：Jiao, Yanchao[1,2];Chen, Feng[1,2];Zhao, Bin[1,2,3];Yang, Hongyun[1,2];Zhang, Jinlong[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Natl Engn Res Ctr Nanotechnol, Shanghai 200241, Peoples R China

年份：2012

卷号：402

起止页码：66

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20122015031644);WOS:【SCI-EXPANDED(收录号:WOS:000304840600009)】；

基金：This work was supported by the National Nature Science Foundations of China (21177039) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Hybrid catalysts; Unique morphology; Excellent photocatalytic activity

摘要：A series of brookite and anatase TiO2 hybrids with different ratios were synthesized by in situ hydrolysis of tetrabutyl titanate (TBOT) on the pre-prepared brookite nanoflowers. The composition and content of the mixture were examined by X-ray diffraction (XRD). The morphology and construction of the hybrids were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM), while BET was used to measure the specific surface area of all the samples. Anatase nano-grains grow on the surface of brookite petals, which builds special heterojunction on their interface and thus benefits the separation of photogenerated electrons and holes under UV irradiation. The TiO2 hybrids appeared superior photocatalytic activity to the single phase toward the degradation of methyl orange (MO) and 2,4-dichlorophenol (2,4-DCP). The hybrid contains 40% anatase and 60% brookite exhibited the highest activity, the degradation rate constants of which are 2.27 and 1.80 times higher than that of the corresponding physically mixed sample for the degradation of MO and 2,4-DCP, respectively. (c) 2012 Elsevier B.V. All rights reserved.