Abstract
The contact form of the heterojunction interface has an importance effect on interfacial photoelectron transfer and photocatalytic property. Here, C/C3N4 heterojunction with three types of interface contact between C and C3N4 have been constructed, including C/C3N4-I, C/C3N4-HI, C/C3N4-D. The physico-chemical properties of the prepared catalysts were characterized by TEM, XRD, XPS, Raman, FT-IR, UV–VIS DRS and UPS. The results indicate that the interface composition (Cg/Cs, Nt/Ns) and valence band characteristic of the photocatalysts are strongly dependent on the interface contact form of C and C3N4. Compared with the C/C3N4-HI and C/C3N4-D, the sample C/C3N4-I present higher ratios of Cg/Cs and Nt/Ns, stronger light response and appropriate band locations. These findings reveal that the C deposited on the surface of C3N4 promotes the efficiencies of light harvest and charge carrier separation, ultimately resulting in an enhanced photocatalytic performance for pure water splitting.
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Acknowledgements
This work is supported by National Nature Science Foundation of China (51572004, 21571003, 21504001 and 51703001), Natural Science Foundation of the Higher Education Institutions of Anhui Province, China (KJ2016SD06, KJ2017A112, KJ2017A111 and KJ2017A115), Natural Science Fund for Distinguished Young Scholars from Anhui Polytechnic University (2016JQ01), and Top-notch Talent Cultivation Plan from Anhui Polytechnic University (2016BJRC002).
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Yang, R., Teng, X., Lu, X. et al. Effect of Interface Contact Between C and C3N4 on Photocatalytic Water Splitting. Catal Lett 148, 1435–1444 (2018). https://doi.org/10.1007/s10562-018-2341-4
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DOI: https://doi.org/10.1007/s10562-018-2341-4