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Dramatically enhanced visible-light driven H2 evolution by anchoring TiO2 nanoparticles on the molecularly grafted carbon nitride nanosheets via a multiple modification strategy

Abstract

The development of graphitic carbon nitride (CN) based photocatalyst toward efficient visible-light driven H2 evolution is highly desired for solar energy conversion. It is well-known that the bulk CN materials possess three intrinsic problems such as high charge recombination loss, low specific surface area, and limited sunlight harvesting range. To simultaneously overcome the above drawbacks of CN, we reported an innovative multiple modification strategy, including molecular graft of CN network, exfoliation to ultrathin nanosheets, and hybridization with TiO2 photocatalysts. The visible-light utilization ability, specific surface area, and charge separation efficiency of CN materials were improved accordingly. As expected, the TiO2/CNX-NSs heterojunction photocatalyst exhibits the remarkably enhnaced visible-light driven H2 production rate of 138.4 μmol h–1, which is about 4.6 times higher than that of pristine CN. The excellent photocatalytic performance under visible-light confirms the successful improvement towards the corresponding drawback of CN by each modification. This work proposed the possibility of combining multiple modifications in a same system to synthesize excellent visible-light driven photocatalyst for solar-to-fuel conversion.

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Publication details

The article was received on 01 Aug 2018, accepted on 12 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT03143F
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Dramatically enhanced visible-light driven H2 evolution by anchoring TiO2 nanoparticles on the molecularly grafted carbon nitride nanosheets via a multiple modification strategy

    J. Wang, Z. Xu, C. Zhuang, H. Wang, X. Xu, T. Li and T. Peng, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT03143F

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