Abstract
In this article, P-g-C3N4/TiO2 (the protonated g-C3N4 is noted as P-g-C3N4) heterojunction photocatalytic materials with hollow sphere structure were synthesized mainly by high-temperature calcination and secondary hydrothermal methods. To obtain highly efficient heterojunction catalytic materials with more uniform surface compounding, we protonated and exfoliated ultrasonically the obtained g-C3N4 before compounding further, which changed its morphology while retaining its semiconductor properties and optical band gap unchanged, and finally obtained the ultra-thin nanoflake structures. On this basis, an optimal proportion of the highest catalytic activity between these two substances was explored by degrading RHB. It was found that the highest catalytic activity of the complexes was achieved at 110 min with a weight ratio of 0.1 of P-g-C3N4 to TiO2 after protonating under the same conditions, and complete degradation was reached at 110 min. Afterward, to further investigate its physicochemical properties, we made various characterizations and proposed a suitable catalytic mechanism of Z-scheme regarding its excellent catalytic properties.
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TW and HD were the experimental designers and executors of the experimental study, completed the data analysis, and wrote the first draft of the paper; HX, TS, and JX were involved in the experimental design and analysis of the experimental results; ZZ and HB are the conceptualizers and leaders of the project, directing the experimental design, data analysis, and paper writing and revision; SL and HZ were involved in the analysis and collation of the literature. All authors read and agreed on the final text.
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Wang, T., Ding, H., Xiao, H. et al. Study on the homogeneous design of ultra-thin protonated g-C3N4 composite TiO2 hollow spheres and its photocatalytic performance for RHB. J Mater Sci: Mater Electron 33, 4482–4496 (2022). https://doi.org/10.1007/s10854-021-07639-y
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DOI: https://doi.org/10.1007/s10854-021-07639-y