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An Intermediate Band Material K2CdSnSe4 and Its Visible-Light Photocatalytic Activity
Sun, Baohua1; He, Jianqiao1; Song, Changsheng; Wang, Dong2; Bu, Kejun1; Yin, Guoheng1; Zhang, Xian3,4; Huang, Fuqiang3,4
2017
发表期刊CHEMISTRYSELECT
ISSN2365-6549
卷号2期号:20页码:5655
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).
DOI10.1002/slct.201700731
WOS记录号WOS:000406681500032
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符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
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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.
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