Microstructure, optical, photoluminescence properties and the intrinsic mechanism of photoluminescence and photocatalysis for the BaTiO3, BaTiO3/TiO2 and BaTiO3/TiO2/CeO2 smart composites

doi:10.1016/j.optmat.2021.111273

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	Microstructure, optical, photoluminescence properties and the intrinsic mechanism of photoluminescence and photocatalysis for the BaTiO3, BaTiO3/TiO2 and BaTiO3/TiO2/CeO2 smart composites
	Wang, Shifa 1,2; Tang, Shengnan 2; Gao, Huajing 1,2,3; Chen, Xiangyu 2; Liu, Hao 2; Yu, Chuan 2; Yin, Zijuan 2; Zhao, Xinxin 2; Pan, Xudong 2; Yang, Hua 3
刊名	OPTICAL MATERIALS
	2021-08
卷号	118
关键词	Hydrothermal synthesis method BaTiO3 Smart materials Photoluminescence properties Methylene blue Photocatalytic activity
ISSN号	0925-3467
DOI	10.1016/j.optmat.2021.111273
英文摘要	The BaTiO3/TiO2/CeO2 smart composites with double type II band arrangement structures were synthesized by a hydrothermal synthesis method. This study attempted to improve the photoluminescence performance and photocatalytic activity by introducing anatase TiO2 or two kinds of metal species, cubic CeO2 and anatase TiO2, fabricated as BaTiO3/TiO2 or BaTiO3/TiO2/CeO2 smart composites. Rietveld refinement analysis revealed a typical tetragonal structure with P4mm(99) space group of pure BaTiO3 smart materials and BaTiO3/TiO2/CeO2 smart composites consist of tetragonal BaTiO3, cubic CeO2 and anatase TiO2. The surface morphology, color, optical absorption coefficient, photoluminescence performance and photocatalytic activity showed strong CeO2 content - dependent behavior. For the pure BaTiO3 smart materials, three obvious emission peaks at 420, 460 and 470 nm can be observed when the excitation wavelength is 295 nm. The introduction of TiO2 into the pure BaTiO3 smart materials to construct BaTiO3/TiO2 smart composites resulted in redshift of emission peak. When TiO2 and CeO2 were introduced into the pure BaTiO3 smart materials, the intrinsic fluorescence emission peak of BaTiO3 was almost quenched. Oxygen vacancy, Ce-4f level and impurity level promote the electron hole pair recombination, which is beneficial to enhance the photoluminescence of the system, but unfavorable to their photocatalytic activity. The BaTiO3/(15 wt%) TiO2/(15 wt%) CeO2 smart composites exhibit a highest photocatalytic activity for the photocatalytic degradation of methylene blue under ultraviolet light irradiation.
WOS研究方向	Materials Science ; Optics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000672621200003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148864]
专题	理学院
作者单位	1.Chongqing Three Gorges Univ, Chongqing Key Lab Geol Environm Monitoring & Disa, Chongqing 404000, Wanzhou, Peoples R China; 2.Chongqing Three Gorges Univ, Sch Elect & Informat Engn, Chongqing 404000, Wanzhou, Peoples R China; 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shifa,Tang, Shengnan,Gao, Huajing,et al. Microstructure, optical, photoluminescence properties and the intrinsic mechanism of photoluminescence and photocatalysis for the BaTiO3, BaTiO3/TiO2 and BaTiO3/TiO2/CeO2 smart composites[J]. OPTICAL MATERIALS,2021,118.
APA	Wang, Shifa.,Tang, Shengnan.,Gao, Huajing.,Chen, Xiangyu.,Liu, Hao.,...&Yang, Hua.(2021).Microstructure, optical, photoluminescence properties and the intrinsic mechanism of photoluminescence and photocatalysis for the BaTiO3, BaTiO3/TiO2 and BaTiO3/TiO2/CeO2 smart composites.OPTICAL MATERIALS,118.
MLA	Wang, Shifa,et al."Microstructure, optical, photoluminescence properties and the intrinsic mechanism of photoluminescence and photocatalysis for the BaTiO3, BaTiO3/TiO2 and BaTiO3/TiO2/CeO2 smart composites".OPTICAL MATERIALS 118(2021).