Direct synthesis of all-inorganic heterostructured CdSe/CdS QDs in aqueous solution for improved photocatalytic hydrogen generation
文献类型：期刊论文
| 作者 | Li, XB ; Li, ZJ; Fan, XB; Li, JX; Zhan, F; Tao, Y; Zhang, XY; Kong, QY; Zhao, NJ; Zhang, JP
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| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
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| 出版日期 | 2017 |
| 卷号 | 5期号:21页码:10365-10373 |
| ISSN号 | 2050-7488 |
| DOI | 10.1039/c7ta01670k |
| 文献子类 | Article |
| 英文摘要 | Here we present a facile aqueous approach to synthesize heterostructured CdSe/CdS QDs with all-inorganic chalcogenide S2- ligands under mild conditions. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and steady-state emission spectroscopy demonstrate that the heterostructured CdSe/CdS QDs with sulfur-rich surface composition are formed by heterogeneous nucleation of Cd2+ and S2- precursors on the CdSe QDs. After adsorption of small Ni(OH)(2) clusters over the surface in situ, the CdSe/CdS-Ni(OH)(2) photocatalyst enables H-2 production efficiently with an internal quantum yield of 52% under visible light irradiation at 455 nm, up to an 8-fold increase of activity to that of spherical CdSe QDs-Ni(OH)(2) under the same conditions. Femtosecond transient absorption spectroscopy, X-ray transient absorption (XTA) spectroscopy, steady-state and time-resolved emission spectroscopy show that the quasi-type-II band alignment in the CdSe/CdS heterostructure is responsible for the efficiency enhancement of light harvesting and surface/interfacial charge separation in solar energy conversion. The unprecedented results exemplify an easily accessible pattern of aqueous synthesis of all-inorganic heterostructured QDs for advanced photosynthetic H-2 evolution. |
| 电子版国际标准刊号 | 2050-7496 |
| WOS关键词 | SEMICONDUCTOR QUANTUM DOTS ; SOLAR-ENERGY CONVERSION ; CHARGE SEPARATION ; NANOROD HETEROSTRUCTURES ; COLLOIDAL NANOCRYSTALS ; NICKEL-CATALYST ; H-2 GENERATION ; VISIBLE-LIGHT ; CDS NANORODS ; IN-SITU |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000402387900030 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285211]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_加速器中心 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Li, XB,Li, ZJ,Fan, XB,et al. Direct synthesis of all-inorganic heterostructured CdSe/CdS QDs in aqueous solution for improved photocatalytic hydrogen generation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(21):10365-10373. |
| APA | Li, XB.,Li, ZJ.,Fan, XB.,Li, JX.,Zhan, F.,...&陶冶.(2017).Direct synthesis of all-inorganic heterostructured CdSe/CdS QDs in aqueous solution for improved photocatalytic hydrogen generation.JOURNAL OF MATERIALS CHEMISTRY A,5(21),10365-10373. |
| MLA | Li, XB,et al."Direct synthesis of all-inorganic heterostructured CdSe/CdS QDs in aqueous solution for improved photocatalytic hydrogen generation".JOURNAL OF MATERIALS CHEMISTRY A 5.21(2017):10365-10373. |
入库方式： OAI收割
来源：高能物理研究所
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