Construction of N-doped TiO2/SnO2 heterostructured microspheres with   dominant {001} facets for enhanced photocatalytic properties

doi:10.1039/c6ce01209d

CORC > 北京大学 > 环境科学与工程学院

	Construction of N-doped TiO2/SnO2 heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties
	Lv, Lingling ; Bai, Xue ; Ye, Zhengfang
刊名	CRYSTENGCOMM
	2016
关键词	VISIBLE-LIGHT PHOTOCATALYSIS MESOPOROUS TIO2 NANOPARTICLES NANOCRYSTALS COMPOSITES NANOTUBES SHEETS SNO2
DOI	10.1039/c6ce01209d
英文摘要	Nitrogen-doped (N-doped) TiO2/SnO2 heterostructured microspheres with exposed mirror-like plane {001} facets were successfully fabricated by a conventional hydrothermal method and easy impregnation treatment. The morphology, structure and photocatalytic properties of the N-doped TiO2/SnO2 heterostructure were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, and transient photocurrent response. Characterization results indicated that in situ formed SnO2 nanoparticles were uniformly grafted onto N-TiO2 microspheres of ca. 2.0 mu m in size. The mirror-like {001} surface of these microspheres was covered by square-shaped crystalline facets ca. 0.6 mu m long. The formation of a heterojunction between SnO2 and N-TiO2 microspheres enhanced the separation efficiency of photogenerated electron-hole pairs and the light-harvesting capability, which significantly improved the photocatalytic performance. Furthermore, N-doped TiO2/SnO2 heterostructured microspheres with highly reactive {001} facets were used as a stable photocatalyst for the highest photocatalytic activity for bisphenol A degradation under UV and visible light irradiation compared with pristine TiO2 and N-TiO2. This result can be attributed to the unique structure and synergistic effect of the dominant mirror-like plane {001} facets, N doping and heterostructured interface. This study provides new possibilities for the development of TiO2 with a dominant {001} facet-based heterostructure for environmental purification.; Specialized Research Fund for the Doctoral Program of Higher Education [20130094120009]; National Natural Science Foundation of China [51308183]; Natural Science Foundation of Jiangsu Province of China [BK20130828]; Fundamental Research Funds for the Central Universities [2013B32214]; Priority Academic Program Development of Jiangsu Higher Education Institutions; SCI(E); ARTICLE; baixue@hhu.edu.cn; 39; 7580-7589; 18
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459203]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Lv, Lingling,Bai, Xue,Ye, Zhengfang. Construction of N-doped TiO2/SnO2 heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties[J]. CRYSTENGCOMM,2016.
APA	Lv, Lingling,Bai, Xue,&Ye, Zhengfang.(2016).Construction of N-doped TiO2/SnO2 heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties.CRYSTENGCOMM.
MLA	Lv, Lingling,et al."Construction of N-doped TiO2/SnO2 heterostructured microspheres with dominant {001} facets for enhanced photocatalytic properties".CRYSTENGCOMM (2016).