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0D/2D spatial structure of CdxZn1-xS/Ni-MOF-74 for efficient photocatalytic hydrogen evolution.
Li, Mei; Li, Junke; Jin, Zhiliang.
Afiliação
  • Li M; School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, P.R. China. zl-jin@nun.edu.cn.
Dalton Trans ; 49(16): 5143-5156, 2020 Apr 28.
Article em En | MEDLINE | ID: mdl-32236209
A novel zero-dimensional/two-dimensional CdxZn1-xS/Ni-MOF-74 (CZS/NMF) heterojunction was rationally constructed via a simple hydrothermal and physical mixing method. The results show that the CZS/NMF-4 composite has the best photocatalytic hydrogen evolution performance, generating 1712.3 µmol of hydrogen within 5 h, approximately 10 times higher than the amount generated by pure CZS. This extraordinary enhanced photocatalytic hydrogen activity can be ascribed to the constitution of the direct Z-scheme heterojunction and the small size effect, as well as the intimate contact between the 0D CdxZn1-xS nanoparticles and the 2D Ni-MOF-74 sheets. The formation of the direct Z-scheme heterojunction can effectively reduce the migration resistance of light-generated carriers and dramatically promote the separation of photo-induced electrons and holes. Meanwhile, the size effect shortens the electron transfer distance which effectively decreases the recombination possibility of photo-induced electron-hole pairs. Furthermore, the 0D/2D spatial structure of CZS/NMF-4 dramatically reduces the agglomeration of CZS nanoparticles, which provides more active sites for the process of hydrogen evolution. In general, this work provides new inspiration for the application of combinations between progressively developing new MOF materials and the traditional CdxZn1-xS photocatalyst according to the construction of a special spatial structure.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Dalton Trans Assunto da revista: QUIMICA Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Dalton Trans Assunto da revista: QUIMICA Ano de publicação: 2020 Tipo de documento: Article