Garden-like perovskite superstructures with enhanced photocatalytic activity

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	Garden-like perovskite superstructures with enhanced photocatalytic activity
	Ye, Meidan ; Wang, Mengye ; Zheng, Dajiang ; Zhang, Nan ; Lin, Changjian ; Lin, Zhiqun ; Lin CJ(林昌健)
刊名	http://dx.doi.org/10.1039/c3nr05564g
	2014
关键词	HYDROTHERMAL SYNTHESIS PBTIO3 NANOPARTICLES BARIUM-TITANATE MTIO3 M SRTIO3 NANOWIRES SIZE MICROSTRUCTURES NANOSTRUCTURES PERFORMANCE
英文摘要	Chinese Scholarship Council; National Natural Science Foundation of China [51072170, 21021002]; National Basic Research Program of China [2012CB932900]; Minjiang Scholar Program and Georgia Institute of Technology; By subjecting amorphous flower-like TiO2 to a facile hydrothermal synthesis in the presence of Sr2+, garden-like perovskite SrTiO3 superstructures were achieved. The amorphous TiO2 was preformed using ZnO flowers as templates. Different three-dimensional SrTiO3 architectures were coexisted in the garden, including SrTiO3 flowers composed of several hollow sword-shaped petals, many sheet-shaped petals or numerous flake-shaped petals, and SrTiO3 grass consisting of a number of long blades. These SrTiO3 superstructures were simultaneously grown on fluorine-doped tin oxide (FTO) substrates. On the basis of a comprehensive study on the effects of growth time, temperature, initial concentrations of precursor, and pH, the formation of these various hierarchical architectures was attributed primarily to the dissolution of amorphous TiO2 and precipitation of perovskite crystals, followed by the Ostwald ripening process of perovskite nanocrystals and self-organization of perovskite building blocks. Interestingly, this approach can be readily extended to create other perovskite structures, including dendritic BaTiO3 and nest-like CaTiO3, as well as PbTiO3 transformed from plate-like pyrochlore Pb2Ti2O6 after post-thermal treatment. Garden-like SrTiO3 superstructures showed a superior photocatalytic performance when compared to other as-prepared semiconductors and perovskite materials (i.e., ZnO, TiO2, BaTiO3, CaTiO3 and PbTiO3), probably due to their intrinsic photocatalytic activity and special garden-like features with a coexistence of various structures that significantly facilitated the adsorption and diffusion of methyl blue (MB) molecules and oxygen species in the photochemical reaction of MB degradation.
语种	英语
出版者	ROYAL SOC CHEMISTRY
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89459]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Ye, Meidan,Wang, Mengye,Zheng, Dajiang,et al. Garden-like perovskite superstructures with enhanced photocatalytic activity[J]. http://dx.doi.org/10.1039/c3nr05564g,2014.
APA	Ye, Meidan.,Wang, Mengye.,Zheng, Dajiang.,Zhang, Nan.,Lin, Changjian.,...&林昌健.(2014).Garden-like perovskite superstructures with enhanced photocatalytic activity.http://dx.doi.org/10.1039/c3nr05564g.
MLA	Ye, Meidan,et al."Garden-like perovskite superstructures with enhanced photocatalytic activity".http://dx.doi.org/10.1039/c3nr05564g (2014).