Preparation of BaSnO3 and Ba(0.9)6La(0.04)SnO(3) by reactive core-shell precursor: formation process, CO sensitivity, electronic and optical properties analysis

doi:10.1039/c6ra02207c

	Preparation of BaSnO3 and Ba(0.9)6La(0.04)SnO(3) by reactive core-shell precursor: formation process, CO sensitivity, electronic and optical properties analysis
	Wang, Xiaodong 1; Huang, Chuande 1,2; Wang, Xueyan 3; Liu, Xin 1; Shi, Quan 1; Pan, Xiaoli 1; Li, Xiaogan 3
刊名	RSC ADVANCES
	2016
卷号	6 期号:30 页码:25379-25387
ISSN号	2046-2069
DOI	10.1039/c6ra02207c
文献子类	Article
英文摘要	We propose a facile and economic strategy for preparing BaSnO3 particles from a room-temperature fabricated BaCO3@SnO2 core-shell precursor. The core-shell structure promoted the mixing degree of the reactants and effectively suppressed sintering of the particles, therefore, pure BaSnO3 was obtained at 800 degrees C, nearly 400 degrees C lower than traditional solid-state reaction (SSR) method, and showed better CO sensitivity than BaSnO3 prepared by SSR route. The phase transformation, morphology changes, and structure evolution from the precursor to the final BaSnO3 were systematically investigated, and a clear picture of the formation mechanism of BaSnO3 was given. Slightly La doped BaSnO3 was prepared through the same procedure as BaSnO3, which proved the availability of this method for synthesis of slightly doped BaSnO3 materials. The optical properties and total conductivity of pure and La doped BaSnO3 were compared. The results showed that the band gap of the La-doped sample was slightly increased, while the resistivity was more than six orders of magnitude lower than that of pure BaSnO3. The underlying reason was studied for the first time by directly monitoring the electron structure of Sn cations at the atomic scale using Sn-119 Mossbauer spectroscopy. It was found that the introduction of La in BaSnO3 solid solution would induce electron donating to the 5s orbital of Sn4+, and Sn cations were slightly reduced. This result gave clear evidence of conduction band filling in La-doped BaSnO3, which accounted for the change in the electric and optical properties.
WOS关键词	PEROVSKITE-TYPE BASNO3 ; SOLID-STATE SYNTHESIS ; HYDROTHERMAL SYNTHESIS ; VISIBLE-LIGHT ; SOLAR-CELLS ; GAS SENSORS ; THIN-FILMS ; SNO2 ; POWDERS ; BACO3
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000372252700067
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170670]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Wang, Xiaodong
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Dalian Univ Technol, Inst Sensing Technol, Sch Elect Sci & Technol, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaodong,Huang, Chuande,Wang, Xueyan,et al. Preparation of BaSnO3 and Ba(0.9)6La(0.04)SnO(3) by reactive core-shell precursor: formation process, CO sensitivity, electronic and optical properties analysis[J]. RSC ADVANCES,2016,6(30):25379-25387.
APA	Wang, Xiaodong.,Huang, Chuande.,Wang, Xueyan.,Liu, Xin.,Shi, Quan.,...&Li, Xiaogan.(2016).Preparation of BaSnO3 and Ba(0.9)6La(0.04)SnO(3) by reactive core-shell precursor: formation process, CO sensitivity, electronic and optical properties analysis.RSC ADVANCES,6(30),25379-25387.
MLA	Wang, Xiaodong,et al."Preparation of BaSnO3 and Ba(0.9)6La(0.04)SnO(3) by reactive core-shell precursor: formation process, CO sensitivity, electronic and optical properties analysis".RSC ADVANCES 6.30(2016):25379-25387.