High-efficiency and mechano-/photo- bi-catalysis of piezoelectric-ZnO@ photoelectric-TiO2 core-shell nanofibers for dye decomposition. (September 2017)

• Record Type: Journal Article
• Authors: You, Huilin; Wu, Zheng; Jia, Yanmin; Xu, Xiaoli; Xia, Yuntao; Han, Zichen; Wang, Yu
• Is Part Of: Chemosphere. Volume 183(2017)
• Page Start: 528
• Page End: 535
• Publication Date: 2017-09
• Subjects: Piezoelectric effect -- Mechano-catalysis -- Photo-catalysis -- Core-shell -- ZnO@TiO2 -- Dye decomposition; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2017.05.130
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: A mechano-/photo- bi-catalyst of piezoelectric-ZnO@photoelectric-TiO2 core-shell nanofibers was hydrothermally synthesized for Methyl Orange (10 mg L −1 ) decomposition. The mechano-/photo- bi-catalysis in ZnO@TiO2 is superior to mechano- or photo-catalysis in decomposing Methyl Orange, which is mainly attributed to the synergy effect of the piezoelectric-ZnO core's mechano-catalysis and the thin photoelectric TiO2 shell's photo-catalysis. The heterostructure of the piezoelectric-ZnO@photoelectric-TiO2 core-shell interface, being helpful to reduce electron-hole pair recombination and to separate the piezoelectrically-/photoelectric ally- induced electrons and holes, may also make a great contribution to the enhanced catalysis performance. The mechano-/photo-bi-catalysis in ZnO@TiO2 core-shell nanofibers possesses the advantages of high efficiency, non-toxicity and tractability and is potential in utilizing mechanical/solar energy to deal with dye wastewater. Graphical abstract: Highlights: The ZnO@TiO2 core-shell nanofibers were hydrothermally synthesized. A mechano-/photo- bi-catalysis of ZnO@TiO2 was realized. Bi-catalysis is superior to mechano-or photo-catalysis in dye decomposition. ZnO@TiO2 is potential in utilizing mechanical/solar energy to degrade dye.