| 用于光降解罗丹明B及光解水制氢的直接Z型异质结CeO2@NiAl-LDHs：性能及机理 | |
| Direct Z-scheme Heterojunction CeO2@NiAl-LDHs for Photodegradation of Rhodamine B and Photocatalytic Hydrogen Evolution: Performance and Mechanism | |
| 摘要: 我们构建了一种具有核壳结构的直接型Z型异质结CeO2@NiAl-LDHs（LDHs=水滑石），其同时兼具高的氧化降解罗丹明B（36.91 mg·g-1·h-1）与还原制氢性能（14.08 mmol·g-1·h-1）。通过密度泛函理论（DFT）计算证实了该异质结中存在内建电场，促使电子从LDHs组分到CeO2组分之间的传递。通过表面光电压谱（SPV）和瞬态光电压（TPV）进一步证实了异质结内部的内建电场加速了电子和空穴的传递，抑制了电子和空穴的复合，从而使得更多的电子和空穴可参与氧化和还原，促使CeO2@NiAl-LDHs异质结光催化剂对罗丹明B的氧化降解和光解水制氢均表现出了较高的活性。 | |
| 关键词: 水滑石 光催化 异质结 内建电场 罗丹明B 制氢 | |
| 基金项目: 国家自然科学基金（No.21503188）和浙江省清洁染整技术研究重点实验室开放基金项目（No.QJRZ1901）资助。 | |
| Abstract: Herein, a direct Z-scheme heterojunction CeO2@NiAl-LDHs (LDHs=layered double hydroxides) with core-shell structure was constructed. It shows high oxidative degradation of rhodamine B (36.91 mg·g-1·h-1) and hydrogen production by photoreduction (14.08 mmol·g-1·h-1). Density functional theory (DFT) calculation shows that there was a built-in electric field in the heterojunction, which promotes the electron transfer from LDHs to CeO2. Surface photovoltage spectroscopy (SPV) and transient photovoltage spectra (TPV) confirmed that the presence of heterojunction accelerated the number of electron transfer, and the recombination of electron and hole was obviously inhibited, so as to participate in oxidation and reduction more. Thus, it makes CeO2@NiAl LDHs heterojunction photocatalyst have high photocatalytic activity for photodegradation of rhodamine B and hydrogen production from water. | |
| Keywords: layered double hydroxides photocatalysis heterojunction build-in electronic field rhodamine B hydrogen evolution | |
| 投稿时间：2020-10-11 修订日期：2020-12-24 | |
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| 张连阳,吴俊杰,孟跃,夏盛杰.用于光降解罗丹明B及光解水制氢的直接Z型异质结CeO2@NiAl-LDHs：性能及机理[J].无机化学学报,2021,37(2):316-326. | |
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