Fabricating Z-scheme C-doped TiO₂/rGO nanocomposites for enhanced photocatalytic NO removal

Meijuan CHEN, Wei WANG, Yu HUANG, Jichang HAN, Yang ZHANG, Tongxi YANG, Jinghan ZHAO, Liyun ZHAO, Wing Kei HO

Research output: Contribution to journalArticlespeer-review

2 Citations (Scopus)


It is attractive to explore practical approaches to optimize the photodegraded NO property of TiO₂. Herein, a typical Z-shaped heterojunction C-TiO₂/rGO composed of carbon-doped TiO₂ and reductive graphene oxide (rGO) was constructed to optimize the NO removal efficiency through an in situ one-pot hydrothermal process with glucose as reductant and dopant. The C-TiO₂/rGO (0.11%) composite displays a remarkable NO removal performance of 40.6% under visible light illumination. It was found that the C-TiO₂ nanoparticles were tightly attached to the rGO sheets and had strong interactions with rGO, which induced a positive impact on not only the light absorption and photo-generated charge separation but also the NO adsorption and reactive oxygen species formation, resulting in boosted photodegrade NO activity. As to the photodegrade NO process over the C-TiO₂/rGO, the HO• and O₂•− were the dominant radicals, of which the O₂•− radical originated from the interactions between C-TiO₂ and rGO. We proposed a Z-scheme mechanism to illuminate the advanced photocatalytic activity of C-TiO₂/rGO. This work affords an approach to developing effective photocatalysts in the NO purification field. Copyright © 2022 IOP Publishing Ltd.

Original languageEnglish
Article number415702
Issue number41
Early online dateJul 2022
Publication statusPublished - Oct 2022


Chen, M., Wang, W., Huang, Y., Han, J., Zhang, Y., Yang, T., . . . Ho, W. (2022). Fabricating Z-scheme C-doped TiO₂/rGO nanocomposites for enhanced photocatalytic NO removal. Nanotechnology, 33(41). Retrieved from https://doi.org/10.1088/1361-6528/ac7daf


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