Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 268, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118382
Keywords
MXene; CdS; Schottky heterojunction; Photocatalytic hydrogen evolution
Funding
- Six Talent Peaks Project in Jiangsu Province [2015-XCL-026]
- Natural Science Foundation of Jiangsu Province [BK20171299]
- State Key Laboratory of Photocatalysis on Energy and Environment [SKLPEE-KF201705]
- Fuzhou University
- National Natural Science Foundation of China [51672113]
- Nanjing Forestry University
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Benefiting from excellent metallic conductivity, full-spectrum solar energy absorption and rich active sites on the surface, atomically thin two-dimensional transition metal carbide (2D NiXene) shows great promise in improving solar-to-hydrogen efficiency and has drawn intense interest in the field of photocatalysis. However, controllable construction of ultrathin 2D MXene-based heterojunction photocatalysts still remains a significant challenge. Herein, one-dimensional (1D) CdS nanorod/2D MXene nanosheet heterojunctions with well-defined nanostructures and strong interfacial coupling are fabricated by in situ assembling solvothermally-generated CdS nanorods on ultrathin Ti3C2 MXene nanosheets. Due to their specific interface characteristics, 1D/2D Schottky heterojunction is capable of providing accelerated charge separation and a lower Schottky barrier for solar-driven hydrogen evolution from water splitting. As expected, the Schottky-based photocatalyst is 7-fold more active in the illuminated hydrogen evolution reaction (HER) than pristine CdS nanorods, implying the synergistic effects between n-type semiconductor CdS and highly conductive 2D Ti3C2 MXene nanosheets.
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