Funding for this research was provided by:
the Natural Science Foundation (51704064)
the Fundamental Research Funds for the Central Universities (N162302001)
Hebei Province higher education science and technology research project (ZD2017309)
the Scientific and Technological Research and Development Plan of Qinhuangdao City (201701B063)
the further support fund of Key Laboratory of Nanomaterials and Photoelectrocatalysis in Qinhuangdao City (201705B021)
the Campus Research Fund of Northeastern University at Qinhuangdao (XNK201602)
Received: 17 April 2018
Accepted: 29 August 2018
First Online: 5 September 2018
: The authors declare that they have no competing interests.
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