Roles of adsorption sites in electron transfer from CdS quantum dots to molecular catalyst cobaloxime studied by time-resolved spectroscopy
文献类型：期刊论文
| 作者 | Ye, Yun1,2; Xu, Yuxing1,2; Huang, Lei1; Fan, Dayong1,2; Feng, Zhaochi1; Wang, Xiuli1; Li, Can1 |
| 刊名 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS
 |
| 出版日期 | 2016-07-14 |
| 卷号 | 18期号:26页码:17389-17397 |
| ISSN号 | 1463-9076 |
| DOI | 10.1039/c6cp02808j |
| 文献子类 | Article |
| 英文摘要 | Electron transfer from CdS quantum dots (QDs) to cobaloxime (Co(dmgH)(2)pyCl) is demonstrated by transient absorption spectroscopy (TAS), and further confirmed using photoluminescence (PL) techniques. The analysis of the PL quenching results offers a novel way to understand the roles of the surface adsorption sites of CdS QDs in the performance of charge transfer in the CdS QDs-cobaloxime hybrid system. Two types of quenching dynamics reveal that there are two different adsorption modes of cobaloxime on the CdS QD surface. When cobaloxime substitutes the surface capping ligands of CdS QDs under low cobaloxime concentrations, the transfer is nearly unfavorable for both the free and trapped electrons. When cobaloxime occupies the surface defect sites of the CdS QDs under high cobaloxime concentrations, the transfer of both the free and trapped electrons is very effective, with an extremely high quenching rate constant of similar to 10(12) M-1 s(-1). Therefore, controlling the molecular adsorption sites and adjusting the surface defect properties of semiconductor QDs provide a strategy to improve the electron transfer efficiency of the QDs-cobaloxime photocatalytic system. |
| WOS关键词 | PHOTOCATALYTIC H-2 PRODUCTION ; CADMIUM-SULFIDE PARTICLES ; SEMICONDUCTOR NANOCRYSTALS ; HYDROGEN EVOLUTION ; OPTICAL-PROPERTIES ; CHARGE SEPARATION ; SURFACE-CHEMISTRY ; LIGHT HARVESTERS ; II-VI ; COMPLEXES |
| WOS研究方向 | Chemistry ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000379482100034 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/170426]  |
| 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, Xiuli; Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ye, Yun,Xu, Yuxing,Huang, Lei,et al. Roles of adsorption sites in electron transfer from CdS quantum dots to molecular catalyst cobaloxime studied by time-resolved spectroscopy[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016,18(26):17389-17397. |
| APA | Ye, Yun.,Xu, Yuxing.,Huang, Lei.,Fan, Dayong.,Feng, Zhaochi.,...&Li, Can.(2016).Roles of adsorption sites in electron transfer from CdS quantum dots to molecular catalyst cobaloxime studied by time-resolved spectroscopy.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(26),17389-17397. |
| MLA | Ye, Yun,et al."Roles of adsorption sites in electron transfer from CdS quantum dots to molecular catalyst cobaloxime studied by time-resolved spectroscopy".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.26(2016):17389-17397. |
入库方式： OAI收割
来源：大连化学物理研究所
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