Volume 59, Issue 28 pp. 11287-11292
Communication

Ultrathin ZnIn2S4 Nanosheets Anchored on Ti3C2TX MXene for Photocatalytic H2 Evolution

Gancheng Zuo

Gancheng Zuo

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore

School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094 P. R. China

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Yuting Wang

Yuting Wang

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 P. R. China

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Wei Liang Teo

Wei Liang Teo

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore

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Prof. Aming Xie

Corresponding Author

Prof. Aming Xie

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094 P. R. China

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Yang Guo

Yang Guo

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 P. R. China

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Yuxuan Dai

Yuxuan Dai

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 P. R. China

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Dr. Weiqiang Zhou

Dr. Weiqiang Zhou

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore

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Deblin Jana

Deblin Jana

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore

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Prof. Qiming Xian

Prof. Qiming Xian

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023 P. R. China

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Prof. Wei Dong

Corresponding Author

Prof. Wei Dong

School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094 P. R. China

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Prof. Yanli Zhao

Corresponding Author

Prof. Yanli Zhao

Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore

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First published: 06 April 2020
Citations: 507

Graphical Abstract

MXene nanosheets are used to support the in situ growth of ultrathin ZnIn2S4. The obtained sandwich-like hierarchical heterostructure could effectively suppress photoexcited electron–hole recombination and boost photoexcited charge transfer and separation, exhibiting efficient photocatalytic H2 evolution performance and excellent stability.

Abstract

Photocatalysts derived from semiconductor heterojunctions that harvest solar energy and catalyze reactions still suffer from low solar-to-hydrogen conversion efficiency. Now, MXene (Ti3C2TX) nanosheets (MNs) are used to support the in situ growth of ultrathin ZnIn2S4 nanosheets (UZNs), producing sandwich-like hierarchical heterostructures (UZNs-MNs-UZNs) for efficient photocatalytic H2 evolution. Opportune lateral epitaxy of UZNs on the surface of MNs improves specific surface area, pore diameter, and hydrophilicity of the resulting materials, all of which could be beneficial to the photocatalytic activity. Owing to the Schottky junction and ultrathin 2D structures of UZNs and MNs, the heterostructures could effectively suppress photoexcited electron–hole recombination and boost photoexcited charge transfer and separation. The heterostructure photocatalyst exhibits improved photocatalytic H2 evolution performance (6.6 times higher than pristine ZnIn2S4) and excellent stability.

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