期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 36, 页码 19062-19071出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta06081e
关键词
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资金
- NTU seed funding for Solar Fuels Laboratory, Singapore MOE AcRF-Tier1 [RG 120/16]
- MOE AcRF-Tier2 [MOE2016-T2-2-056]
- National Natural Science Foundation of China [21503127]
- Fundamental Research Funds for the Central Universities [GK201603030]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JM2008]
We report the successful growth of high quality carbon nitride based copolymer (CNBC) films on various substrates (glass, FTO, and TiO2) through a facile solvothermal method with post-annealing. The structural characterization of the films reveals the polymeric carbon nitride network consisting of tri-striazines and s-triazines bridged by different functional groups. The strong bonding between the CNBC films and the substrates via covalent linkage ensures intimate contact and smooth interfacial charge transport. As such, the CNBC films exhibit excellent photoelectrochemical (PEC) performance, which is attributed to stronger visible light harvesting, better conductivity, and more efficient charge separation and transport, as compared to a reference electrode made by pasting bulk g-C3N4 powder. Furthermore, we demonstrate that a similar solvothermal approach can be also used to create CNBC films on a TiO2 surface, and the resulting CNBC/TiO2 junction allows for vectorial charge transfer, giving greatly enhanced photocurrent responses. Importantly, this work provides a general guide to solvothermal methods for in situ growing metal-free films on various substrates for efficient PEC water
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