Interfacial-charge-transfer-induced photochromism of MoO3@TiO2crystalline-core amorphous-shell nanorods

doi:10.1016/j.solmat.2016.10.016

	Interfacial-charge-transfer-induced photochromism of MoO3@TiO2crystalline-core amorphous-shell nanorods
	Li, Ning 1,4; Li, Yamei 2; Zhou, Yijie 1; Li, Wenjing 1; Ji, Shidong 1; Yao, Heliang 1; Cao, Xun 1; Jin, Ping 1,3
刊名	Solar Energy Materials and Solar Cells
	2017
卷号	160 页码:116-125
ISSN号	09270248
DOI	10.1016/j.solmat.2016.10.016
英文摘要	Materials with excellent photochromic (PC) characteristics are promising to be applied in energy-saving smart windows, however little progress was achieved in the past decade. Herein we propose a heterojunction strategy based on a MoO3@TiO2(MT) core/shell nanorods system to obtain remarkably enhanced photochromic property. MT core/shell nanorods have a crystalline MoO3core with a chemically bonded amorphous TiO2shell. They were synthesized by a scalable water-bath method and characterized by using x-ray diffraction (XRD), transmission electron microscopy, Raman spectroscopy, x-ray photoelectron spectroscopy (XPS), electron energy loss spectrum (EELS) and ultraviolet-visible spectrophotometry. The MT photochromic response extends from the visible to the infrared and depends on the transmittance of the MT core/shell nanorods. The photochromic optical modulation of MT core/shell nanorods is faster and more efficient than that of MoO3nanorods, derived from remarkable structural and chemical changes, as revealed by XRD and Raman spectroscopy. XPS analysis combined with EELS probing on a single rod indicates that the photochromic-enhancement mechanism is highly correlated to the charge transfer between Ti and Mo species, especially across the MoO3/TiO2interface. Oxidation of Ti3+occurs simultaneously with the PC reductive transition of the Mo center, which indicates that Ti3+plays an important role either as electron source or by favoring electron transfer by charge rectification through hole scavenging. The significant role of Ti3+is further confirmed by annealing the material in air, which quenches the Ti3+defects and thereby reduces PC enhancement to negligible levels compared with the unannealed samples. By controlling the shell defect state rather than only considering the bulk band structure, this work provides a new paradigm for modulating photo-driven charge transfer across core/shell heterojunctions. © 2016 Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25599]
专题	中国科学院上海硅酸盐研究所
通讯作者	Cao, Xun
作者单位	1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai; 200050, China; 2.Biofunctional Catalyst Research Team, Riken, 2-1 Hirosawa, Wako, Saitama; 351-0198, Japan; 3.National Institute of Advanced Industrial Science and Technology (AIST), Moriyama, Nagoya; 463-8560, Japan; 4.University of Chinese Academy of Sciences, Beijing; 100049, China
推荐引用方式 GB/T 7714	Li, Ning,Li, Yamei,Zhou, Yijie,et al. Interfacial-charge-transfer-induced photochromism of MoO3@TiO2crystalline-core amorphous-shell nanorods[J]. Solar Energy Materials and Solar Cells,2017,160:116-125.
APA	Li, Ning.,Li, Yamei.,Zhou, Yijie.,Li, Wenjing.,Ji, Shidong.,...&Jin, Ping.(2017).Interfacial-charge-transfer-induced photochromism of MoO3@TiO2crystalline-core amorphous-shell nanorods.Solar Energy Materials and Solar Cells,160,116-125.
MLA	Li, Ning,et al."Interfacial-charge-transfer-induced photochromism of MoO3@TiO2crystalline-core amorphous-shell nanorods".Solar Energy Materials and Solar Cells 160(2017):116-125.