Formation Process of TiO2 Hollow Nanofibers Covered with CdS Ultrathin Nanosheets

doi:10.7517/j.issn.1674-0475.2015.05.374

Abstract

Abstract:

We synthesize the PVP-TBT-Cd(Ac)₂ nanofibers with about 250 nm in diameter by electrospinning technology. After calcination in air and hydrothermal treatment in Na₂S aqueous solution, TiO₂ hollow nanofibers covered with CdS ultrathin nanosheets are formed. The formation process is as follows: the nanofibers are composed of the CdO and TiO₂ nanoparticles after calcination. When hydrothermal treatment in Na₂S aqueous solution, the CdO nanoparticles are dissolved and formed CdS nanosheets covered TiO₂. Due to the dissolution of CdO nanoparticles, the hollow nanofibers composed of TiO₂ nanoparticles are formed. The TiO₂@CdS nanocomposites have the best H₂ production rate when the molar ratio of Ti/Cd is 1/1. The H₂ production rate of TiO₂@CdS nanocomposites is about 19.7 and 3.4 μmol/h for 50 mg sample under 300 W Xe lamp without and with a UVCUT-420 nm filter, respectively.

Key words: electrospinning, CdS nanosheets, TiO₂ hollow structure, formation process, photocatalytic H₂ production

ZHANG Guoqiang, QU Dan, MIAO Xiang, ZHANG Xiaoyan, SUN Zaicheng. Formation Process of TiO₂ Hollow Nanofibers Covered with CdS Ultrathin Nanosheets[J]. Imaging Science and Photochemistry, 2015, 33(5): 374-382.

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Formation Process of TiO₂ Hollow Nanofibers Covered with CdS Ultrathin Nanosheets

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