Hydrothermal In-situ Synthesis and Enhanced Photocatalytic Properties of SrTiO3/TiO2 Composite Nanofibers

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (11): 2490.

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Hydrothermal In-situ Synthesis and Enhanced Photocatalytic Properties of SrTiO3/TiO2 Composite Nanofibers

LI Yue-Jun^1,2, CAO Tie-Ping^1,2, WANG Chang-Hua¹, SHAO Chang-Lu^1*

1. Centre for Advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 130024, China;
2. Department of Chemistry, Baicheng Normal University, Baicheng 137000, China

Received:2011-02-25 Revised:2011-05-13 Online:2011-11-10 Published:2011-10-14
Contact: SHAO Chang-Lu E-mail:clshao@nenu.edu.cn
Supported by:
国家自然科学基金(批准号: 50572014, 50972027)和教育部新世纪优秀人才支持计划(批准号: NCET-05-0322)资助.

Abstract

Abstract: Heterostructured SrTiO3/TiO2 composite nanofibers were fabricated by in situ hydrothermal method using TiO2 nanofibers as both template and reactant. The morphology and structure of SrTiO3/TiO2 composite nanofibers were characterized via X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM), energy-dispersive spectrometry(EDS), high-resolution transmission electron microscopy(HRTEM) and X-ray photoelectron spectroscopy(XPS).The as-fabricated heterostructured composite included SrTiO3 nanocubes assembled uniformly on the surface of TiO2 nanofibers. Compared with the pure TiO2 nanofibers, SrTiO3/TiO2 nanofibers exhibited enhanced photocatalytic activity in the decomposition of Rhodamine B(RB) under ultraviolet light. This material also showed good catalytic stability and the decolorizing efficiency of RB solution remained above 97% after 5 times recycle, and was easily separated, removed from the system after reaction and reuse. Finally, the growth mechanism of SrTiO3/TiO2 heterojunction and the mechanism for the enhancement of photocatalytic activity of heterostructured nanofibers were discussed.

Key words: Electrospinning, In-situ hydrothermal synthesis, SrTiO3/TiO2, Photocatalytic degradation

CLC Number:

O614

TrendMD:

LI Yue-Jun, CAO Tie-Ping, WANG Chang-Hua, SHAO Chang-Lu*. Hydrothermal In-situ Synthesis and Enhanced Photocatalytic Properties of SrTiO3/TiO2 Composite Nanofibers[J]. Chem. J. Chinese Universities, 2011, 32(11): 2490.

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Hydrothermal In-situ Synthesis and Enhanced Photocatalytic Properties of SrTiO3/TiO2 Composite Nanofibers

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