期刊
ENVIRONMENTAL RESEARCH
卷 203, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111844
关键词
Ni-Co; Bimetallic nanoparticles; Photocatalytic H-2 production; Carbon nitride nanotubes; Nitrogen vacancies
资金
- National Natural Science Foundation of China [52002186]
- Scientific Research Foundation from Nanjing Forestry University
This study successfully engineered carbon nitride nanotubes with bimetallic Ni-Co and monometallic nanoparticles for visible-light photocatalytic H-2 generation. The design of bimetallic NPs and nitrogen vacancies enhances the photocatalytic activity.
This work for the first time reports bimetallic Ni-Co and monometallic (Ni and Co) nanoparticles (NPs)-engineered carbon nitride nanotubes with nitrogen vacancies (V-CNNTs) for visible-light photocatalytic H-2 generation application. The bimetallic Ni-Co NPs have an average size of less than 5 nm and are homogenously dispersed along the nanochannels of V-CNNTs. The composition of the bimetallic NPs plays an essential role to maximize photocatalytic activity. With the optimal Ni/Co atom ratio of 3:1, Ni-Co/V-CNNTs nanohybrids yielded a H-2 production rate of 4.19 mu mol/h, which is higher than those of monometallic counterparts and VCNNTs. The intimately loaded Ni-Co NPs and incorporated nitrogen vacancies enhance the photocatalytic performance through extended light absorption, abundant active sites, strong metal-support interaction, and efficient charge carrier transfer along the axial direction. This study presents a stable and highly efficient hybrid as a promising photocatalyst for visible light photocatalytic H-2 production through water splitting.
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