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Narrow-bandgap Nb2O5 nanowires with enclosed pores as high-performance photocatalyst

内嵌孔型窄带隙Nb2O5纳米线及其光催化研究

Abstract

Porous niobium oxide nanowires synthesized via a solvothermal method exhibited decreased bandgap, enhanced light absorption and reduced charge-recombination rate. The porous Nb2O5 nanowires showed increased performance for the photocatalytic H2 evolution and photodegradation of rhodamine B, as compared to their solid counterparts, which could be ascribed to the peculiar porous nanostructure.

摘要

本论文介绍了一种通过溶剂热制备内嵌孔型氧化铌纳米线的方法. 该方法得到的氧化铌材料能带显著变窄, 吸光范围大幅增加, 电子空穴复合速率降低. 相比于无孔Nb2O5纳米线和商业粉末, 这种多孔纳米线显示出卓越的光催化析氢性能和罗丹明染料降解效果, 这都与其特殊的内嵌孔构造存在着密切关系.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51271215 and 21601133) and Sinopec Innovation Scheme (A-381). We acknowledge Dr. Xin Sun from Tianjin University of Technology for his help with the HRTEM.

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Correspondence to Miao Zhang or Shi Hu.

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Ying Zhang received her BE degree from Shandong University in 1998. She obtained her PhD degree in chemical engineering and technology at China University of Petroleum in 2008. Now she is an associate professor at the College of Chemical Engineering of China University of Petroleum. Her research focuses on nanomaterials for catalysis, energy storage and conversion.

Miao Zhang received her PhD from the Institute of Chemistry, Chinese Academy of Sciences. After her postdoctoral research in Lawrence Berkeley National Laboratory (LBNL), she is currently a research scientist in Chemical Science Division at LBNL. Her research interests encompass the development of photocatalyst and Operando spectroscopy.

Shi Hu received his BSc degree in Nanjing University in 2002 and his PhD degree in chemistry from Tsinghua University in 2012. After the post-doctoral research in North Carolina State University and Pennsylvania State University, he is now a professor in the Department of Chemistry of Tianjin University. His research interest focuses on new materials and nanostructures for photocatalysis, electrocatalysis and gas sensing.

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Zhang, Y., Zhao, H., Zhao, X. et al. Narrow-bandgap Nb2O5 nanowires with enclosed pores as high-performance photocatalyst. Sci. China Mater. 62, 203–210 (2019). https://doi.org/10.1007/s40843-018-9308-7

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Keywords

  • niobium oxide
  • nanowires
  • photocatalysis