| 放射性碘分子在Cu2O表面的吸附:第一性原理密度泛函研究 |
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| 引用本文： | 李奎,赵耀林,邓佳,贺朝会,丁书江,石伟群.放射性碘分子在Cu2O表面的吸附:第一性原理密度泛函研究[J].物理化学学报,2016,32(9):2264-2270. |
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| 作者姓名： | 李奎 赵耀林 邓佳 贺朝会 丁书江 石伟群 |
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| 作者单位： | 1 西安交通大学核科学与技术学院,西安7100492 西安交通大学理学院应用化学系,西安7100493 中国科学院高能物理研究所,核辐射与核能技术重点实验室,纳米生物效应与安全性重点实验室,北京100049 |
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| 基金项目： | National Natural Science Foundation of China(11275147);Program for Changjiang Scholars and Innovative Research Team in University, China(IRT1280) |
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| 摘 要： | 采用第一性原理密度泛函计算方法和周期性平板模型系统研究了放射性碘分子在Cu2O三个低指数表面的吸附行为。通过计算若干平衡吸附构型的结构参数和吸附能评估了不同特征吸附位的作用。构型优化计算表明所选晶面存在适度的结构弛豫。计算结果表明，与Cu2O（110）表面相比，Cu2O（100）和（111）晶面表现出更高的碘分子吸附反应活性。其中，表面氧原子位（OS）和配位未饱和铜原子位（CuCUS）分别为Cu2O（100）和（111）晶面的能量最优吸附位点。此外，针对几种典型吸附结构计算分析了其电子结构信息，以进一步阐明吸附体系之间的相互作用机理。
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| 关 键 词： | 放射性碘分子 Cu2O 表面吸附 低指数表面 密度泛函理论计算 |
| 收稿时间： | 2016-04-11 |
Adsorption of Radioiodine on Cu2O Surfaces: a First-Principles Density Functional Study |
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| Kui LI,Yao-Lin ZHAO,Jia DENG,Chao-Hui HE,Shu-Jiang DING,Wei-Qun SHI.Adsorption of Radioiodine on Cu2O Surfaces: a First-Principles Density Functional Study[J].Acta Physico-Chimica Sinica,2016,32(9):2264-2270. |
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| Authors: | Kui LI Yao-Lin ZHAO Jia DENG Chao-Hui HE Shu-Jiang DING Wei-Qun SHI |
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| Institution: | 1. School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China;2. Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an 710049, P. R. China;3. Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China |
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| Abstract: | The adsorption behavior of radioiodine (I2) molecules on three different low-index surfaces of cuprous oxide (Cu2O) was systematically investigated using first-principles density functional calculations with periodic slab models. The role of typical surface adsorption sites was evaluated by calculating structural parameters of the adsorption configurations and energy features. Moderate geometry relaxation of the three low-index surfaces was observed. The results of geometry optimization and total energy calculations indicated that the Cu2O(100) and (111) surfaces exhibit higher reactivity towards I2 adsorption than the Cu2O(110) surface. The surface oxygen site (OS) was determined to be the most favorable adsorption site on the Cu2O(100) surface, while the coordinatively unsaturated copper site (CuCUS) was energetically preferred on the Cu2O(111) surface. In addition, the electronic structure information for several typical configurations were explored to explain the detailed interaction mechanism of adsorbed systems. |
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| Keywords: | Radioiodine molecule Cu2O Surface adsorption Low-index surface Density functional theory calculation |
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