Structure characterization, optical and photoluminescence properties of scheelite-type CaWO4 nanophosphors: Effects of calcination temperature and carbon skeleton

doi:10.1016/j.optmat.2019.109562

	Structure characterization, optical and photoluminescence properties of scheelite-type CaWO4 nanophosphors: Effects of calcination temperature and carbon skeleton
	Wang, Shifa 2,3; Gao, Huajing 1,2; Sun, Guangzhuang 2; Li, Yanwu 2; Wang, Yong 2; Liu, Hufeng 2; Chen, Chaoli 2; Yang, Liang 4
刊名	OPTICAL MATERIALS
	2020
卷号	99 页码:11
关键词	CaWO4 Polyacrylamide gel method Calcination temperature Carbon skeleton Emission peak
ISSN号	0925-3467
DOI	10.1016/j.optmat.2019.109562
通讯作者	Wang, Shifa(20180011@sanxiau.edu.cn) ; Gao, Huajing(ghj2011@yeah.net)
英文摘要	The synthesis of self-activating tungstate phosphor is always associated with complicated procedures, and it is still challenging to adjust and control their phase transition, optical, and photoluminescence properties by a gamma-ray irradiation assisted polyacrylamide gel method. Scheelite-type calcium tungstate (CaWO4) nanophosphors with different phase purity were synthesized by a wet chemistry method and the phase transition, optical, and photoluminescence properties of as-prepared samples were systematically studied. The calcination temperature and carbon skeleton have significant impact on the phase structure, crystalline size, optical and photoluminescence properties of CaWO4 nanophosphors. The crystallite size of CaWO4 nanophosphors increases with the increasing of calcination temperature. Below 600 degrees C, the Eg value of CaWO4 products increases with the increasing of calcining temperature, while the Eg value showed the opposite trend for the CaWO4 xerogel sintered at above 700 degrees C due to the effects of crystallinity and residual carbon skeleton. The color and optical properties shows that the pure CaWO4 is a potential white pigment. The photoluminescence spectra show that the CaWO4 products obtained by calcining the CaWO4 xerogel at different temperatures have a major emission band around 428 nm and a weak emission peak at 386 nm with the excitation wavelength of 240 nm. The intensity of emission peak at 428 nm increase first and then decreases with the increasing of calcining temperature. The emission peaks at 428 and 386 nm can be ascribed to the T-1(2) to (1)A(1) optical transition of electrons within [WO4](2-) anions and the defect or carbon skeleton, respectively.
资助项目	Talent Introduction Project of Chongqing Three Gorges University[09924601] ; Major Cultivation Projects of Chongqing Three Gorges University[18ZDPY01] ; Research project of higher education teaching reform of Chongqing Three Gorges University[JGZC1903] ; Chongqing basic research and frontier exploration (general project)[cstc2019jcyj-msxmX0310] ; Chongqing basic research and frontier exploration (general project)[cstc2018jcy-jAX0599] ; Science and Technology Research Program of Chongqing Education Commission of China[KJQN201901]
WOS研究方向	Materials Science ; Optics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000518692000077
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9848]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, Shifa; Gao, Huajing
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China 2.Chongqing Three Gorges Univ, Sch Elect & Informat Engn, Chongqing 404000, Wanzhou, Peoples R China 3.Chongqing Three Gorges Univ, Chongqing Key Lab Geol Environm Monitoring & Disa, Chongqing 404000, Wanzhou, Peoples R China 4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shifa,Gao, Huajing,Sun, Guangzhuang,et al. Structure characterization, optical and photoluminescence properties of scheelite-type CaWO4 nanophosphors: Effects of calcination temperature and carbon skeleton[J]. OPTICAL MATERIALS,2020,99:11.
APA	Wang, Shifa.,Gao, Huajing.,Sun, Guangzhuang.,Li, Yanwu.,Wang, Yong.,...&Yang, Liang.(2020).Structure characterization, optical and photoluminescence properties of scheelite-type CaWO4 nanophosphors: Effects of calcination temperature and carbon skeleton.OPTICAL MATERIALS,99,11.
MLA	Wang, Shifa,et al."Structure characterization, optical and photoluminescence properties of scheelite-type CaWO4 nanophosphors: Effects of calcination temperature and carbon skeleton".OPTICAL MATERIALS 99(2020):11.