Expression of concern: Enhanced photocatalytic activity of g-C3N4/MnO composites for hydrogen evolution under visible

Na Mao1,2, Xiaomin Gao1, Chong Zhang1

  • 1Shaanxi Key Laboratory for Advanced Energy Devices, Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, Shaanxi, P. R. China. jiaxing@snnu.edu.cn.

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