title: The Kirkendall effect towards oxynitride nanotubes with improved visible light driven conversion of CO2 into CH4.
abstract: Functional hollow nanomaterials are of great interest due to their unique physical-chemical properties. Oxynitride photocatalysts are a kind of promising material for solar energy conversion. However, nanoscale design of hollow oxynitrides was difficult to achieve due to the thermal instability of oxide precursors at high temperature. Here, single crystal zinc gallium oxynitride nanotubes were successfully synthesized via the Kirkendall effect with ZnO nanorods and Ga2O3 nanosheets as precursors, which can be attributed to the high diffusion rate of ZnO and the high melting point of oxynitride. Enhanced photocatalytic performance in CO2 reduction was achieved over the as-prepared ZnGaNO nanotubes, due to their higher specific surface area and less recombination of the photogenerated carriers. These results are expected to provide new guidance in the design and preparation of highly efficient nano-scaled oxynitride photocatalysts.
authors.affiliation: National Laboratory of Solid State Microstructures, Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing, Jiangsu 210093, PR China.
authors.forename: P
authors.initials: P
authors.lastname: Zhou
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, No. 22, Hankou Road, Nanjing, Jiangsu 210093, PR China. yscfei@nju.edu.cn.
authors.forename: H L
authors.initials: HL
authors.lastname: Gao
authors.affiliation: Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, No. 22, Hankou Road, Nanjing, Jiangsu 210093, PR China. yscfei@nju.edu.cn and Jiangsu Key Laboratory for Nano Technology, Nanjing 210093, P. R. China.
authors.forename: S C
authors.initials: SC
authors.lastname: Yan
authors.affiliation: National Laboratory of Solid State Microstructures, Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, No. 22, Hankou Road, Nanjing, Jiangsu 210093, PR China and Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, No. 22, Hankou Road, Nanjing, Jiangsu 210093, PR China. yscfei@nju.edu.cn and Jiangsu Key Laboratory for Nano Technology, Nanjing 210093, P. R. China.
authors.forename: Z G
authors.initials: ZG
authors.lastname: Zou