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Recent advances on silica-based nanostructures in photocatalysis

光催化中二氧化硅基纳米结构的研究进展

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Abstract

Development of highly efficient photocatalysts has emerged as a research hotspot because of their crucial role in affecting the conversion efficiency of solar energy for applications in resource exploitation and environmental purification. The photocatalytic performance of the photocatalysts basically depends on the behaviors of light absorption, charge generation and separation, surface property and structural stability. Owing to its unique advantages (high surface area, tunable porosity, modifiable surface), porous silica provides an interesting platform to construct well-defined nanostructures such as core-shell, yolk-shell and other specific structures which effectively improved one or more of the above behaviors for photocatalysis. Typically, the structure with hollow morphology favors the light scattering and enlargement of surface area, while coating or binding with silica can modify the surface property of a photocatalyst to enhance the surface adsorption of reactants and physicochemical stability of catalysts. This review discusses the recent advances in the design, synthesis, formation mechanism of well-defined silica-based nanostructures, and the achievements of desired physicochemical properties for regulating the photocatalytic performance.

摘要

由于太阳能转化效率对资源开发和环境净化应用的重要影 响, 发展高效光催化剂成为一个研究热点. 光催化性能主要取决于 材料的光吸收、电荷产生与分离、表面性质以及结构稳定性等特 性. 多孔二氧化硅因具有高比表面积、孔隙可调和表面易修饰等 独特优势, 而发展为一个用于构建结构明晰的纳米结构(如核-壳、 蛋黄-壳和其他特殊结构)的重要平台, 以有效改善上述决定光催化 性能的一种或多种特性. 通常, 中空的结构有利于光散射和比表面 积的增加, 而二氧化硅作为包覆或粘结材料可对光催化剂表面改 性以增强其对反应物的表面吸附和物理化学稳定性. 本文综述了 结构明晰二氧化硅基纳米结构的设计、合成、形成机理以及对光 催化性能调控等方面的最新研究进展.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21771070 and 21571071) and the Fundamental Research Funds for the Central Universities (2018KFYYXJJ120 and 2019KFYRCPY104).

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Authors and Affiliations

  1. Key Laboratory of Materials Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Heng Wang  (王蘅), Qian Tang  (唐倩), Zhen Chen  (陈真), Tao Li  (李涛) & Jingyu Wang  (王靖宇)

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  1. Heng Wang  (王蘅)
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  2. Qian Tang  (唐倩)
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  3. Zhen Chen  (陈真)
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  4. Tao Li  (李涛)
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Contributions

Wang H and Tang Q wrote the manuscript, prepared the figures, and analyzed the references; Chen Z participated in the data analysis; Li T provided the helpful discussions; Wang J conceived the idea and revised the manuscript. All authors participated in the general discussion.

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Correspondence to Jingyu Wang  (王靖宇).

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The authors declare that they have no conflict of interest.

Heng Wang received her BSc degree from Wuhan University of Science and Technology in 2018. She currently studies as a master candidate under the supervision of Prof. Jingyu Wang at Huazhong University of Science and Technology. Her research mainly focuses on the assembly strategy and formation mechanism of composite nanostructures for photocatalysis.

Qian Tang received her BSc degree from Wuhan University of Science and Technology in 2019. She is currently studying for a master’s degree under the supervision of Prof. Jingyu Wang at Huazhong University of Science and Technology. Her main research interest focuses on the design and construction of porous frameworks for CO2 uptake and photocatalytic conversion.

Zhen Chen obtained his PhD degree in materials physics and chemistry from Huazhong University of Science and Technology in 2018. Currently, he worked as a postdoctoral fellow under the supervision of Prof. Tao Li at Huazhong University of Science and Technology. His research interest focuses on the heterogeneous catalysis, mainly on the relationship between nanostructure and catalytic activity.

Tao Li received his PhD degree in chemistry from Dalian Institute of Chemical Physics, Chinese Academy of Sciences in 1998 and then worked as a research staff at this institute until 2000. Thereafter, he worked as a postdoctoral fellow at Taiwan University (2000-2002). He spent two years as a special researcher at the National Institute of Advanced Industrial Science and Technology (AIST), Japan. In 2004, he joined Huazhong University of Science and Technology as a professor. His research interest mainly focuses on the environmental heterogeneous catalysis.

Jingyu Wang is a professor in the School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology. Prior to that, she worked as an associate professor at Harbin Institute of Technology and a visiting scholar at the University of Chicago. She received her PhD degree in chemistry from Wuhan University in 2007. Her current research interest includes the development of photocatalysts for environmental and energy applications.

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Wang, H., Tang, Q., Chen, Z. et al. Recent advances on silica-based nanostructures in photocatalysis. Sci. China Mater. 63, 2189–2205 (2020). https://doi.org/10.1007/s40843-020-1381-y

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  • DOI: https://doi.org/10.1007/s40843-020-1381-y

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