期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 439, 期 -, 页码 62-68出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2014.10.026
关键词
Halloysite; Electrospun TiO2 nanofibers; Visible-light photocatalyst
资金
- National Natural Science Foundation of China [51125011, 51373037]
In this work, the effects of halloysite nanotubes (HNTs) on the visible-light photocatalytic ability of electrospun carbon doped TiO2/HNT (C-TH) nanofibers have been explored. Structural and morphological investigations demonstrate that incorporation of HNTs into anatase C-TH hybrid nanofibers was easily achieved by using sol-gel processing combined with electrospinning approach, thus HNTs could be uniformly embedded in the electrospun nanofibers. The visible-light photocatalytic efficiency of C-TH hybrid on the degradation of methyl blue (MB) was greatly enhanced with the combination of moderate amount of HNTs (8%), which was 23 times higher than that of commercial anatase TiO2.Mechanism of the enhancing effect of IINTs has been explored by analyzing the dual-effect of adsorption and photocatalysis in various amounts of HNTs incorporated C-TiO2 nanofibers. With nanotubular structure and considerable adsorption ability, incorporated HNTs functioned as porogen agent in C-TH nanofibers. This simple incorporation approach increases the specific surface areas of nanofibers, which improves the mass transport of reactant into the nanofibers and the adsorption of visible-light by scattering, meanwhile may suppress the charge recombination and enhance photoinduced charge separation, thus efficiently enhancing visible-light photocatalytic performance of the C-TH hybrid nanofibers. (C) 2014 Elsevier Inc. All rights reserved.
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