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Interfacial-charge-transfer-induced photochromism of MoO3@TiO2crystalline-core amorphous-shell nanorods
Li, Ning1,4; Li, Yamei2; Zhou, Yijie1; Li, Wenjing1; Ji, Shidong1; Yao, Heliang1; Cao, Xun1; Jin, Ping1,3
2017
Source PublicationSolar Energy Materials and Solar Cells
ISSN09270248
Volume160Pages:116-125
AbstractMaterials 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.
DOI10.1016/j.solmat.2016.10.016
EI Accession Number20164402972915
EI KeywordsX ray photoelectron spectroscopy
EI Classification Number408.2 Structural Members and Shapes - 525.2 Energy Conservation - 525.4 Energy Losses (industrial and residential) - 543.3 Molybdenum and Alloys - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 933 Solid State Physics - 933.1 Crystalline Solids - 951 Materials Science
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25599
Collection中国科学院上海硅酸盐研究所
Corresponding AuthorCao, Xun
Affiliation1.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
Recommended Citation
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.
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