An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity

doi:10.1002/slct.201700731

	An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity
	Sun, Baohua 1; He, Jianqiao 1; Song, Changsheng ; Wang, Dong 2; Bu, Kejun 1; Yin, Guoheng 1; Zhang, Xian 3,4; Huang, Fuqiang 3,4
刊名	CHEMISTRYSELECT
	2017
卷号	2 期号:20 页码:5655
ISSN号	2365-6549
DOI	10.1002/slct.201700731
英文摘要	Intermediate bands (IBs) can significantly extend the absorption range of solar absorbers. Here, an intermediate band material K2CdSnSe4 was synthesized via a urea flux method at 220 degrees C. The structure features [CdSnSe4](2-) One-dimensional chains, which were built up by [CdSe4](6-) and [SnSe4](4-) tetrahedra via edge sharing. Optical measurements indicate that the as-synthesized K2CdSnSe4 compound has typical multi-absorption characters with an absorption edge at 1.63 eV and an absorption peak around 398 nm (3.1 eV). First-principles calcu-lation results, which are perfectly consistent with the experimental results, show that the intermediate bands mainly consist of Sn-5 s and Se-4p orbitals. Photoresponse was observed under visible light illumination with a photocurrent density of 217 mu A.cm(-2) at 1 V. Methyl orange (MO) was used as model pollutant for photodegradation test. About 99% of MO (10 mg.L-1) was removed after 4 h under visible light illumination using K2CdSnSe4 powder (1 g.L-1) as photocatalyst, which is better than that of C3N4 (similar to 45% at 240 min).
WOS记录号	WOS:000406681500032
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26663]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, 1295,Dingxi Rd, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 3.Shanghai Univ, Sch Mat Sci & Engn, Shangda Rd 99, Shanghai 200444, Peoples R China 4.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, 202 Chengfu Rd, Beijing 100871, Peoples R China 5.Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, 202 Chengfu Rd, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Sun, Baohua,He, Jianqiao,Song, Changsheng,et al. An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity[J]. CHEMISTRYSELECT,2017,2(20):5655.
APA	Sun, Baohua.,He, Jianqiao.,Song, Changsheng.,Wang, Dong.,Bu, Kejun.,...&Huang, Fuqiang.(2017).An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity.CHEMISTRYSELECT,2(20),5655.
MLA	Sun, Baohua,et al."An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity".CHEMISTRYSELECT 2.20(2017):5655.