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Ti3C2 Mxene/porous g-C3N4 interfacial Schottky junction for boosting spatial charge separation in photocatalytic H2O2 production
Abstract
Abstract The development of efficient photocatalysts for the production of hydrogen peroxide (H2O2) is a promising strategy to realize solar-to-chemical energy conversion. Graphitic carbon nitride (g-C3N4) presents giant potential for photocatalytic H2O2 production, but the sluggish charge separation depresses its photocatalytic performance. Herein, an interfacial Schottky junction composed of Ti3C2 nanosheets and porous g-C3N4 nanosheets (TC/pCN) is constructed by a facile electrostatic self-assembly route to significantly boost the spatial charge separation to promote the activation of molecular oxygen for H2O2 production. As the optimal sample, TC/pCN-2 possesses the highest H2O2 production rate (2.20 μmol L−1 min−1) under visible light irradiation (λ > 420 nm), which is about 2.1 times than that of the porous g-C3N4. The results of superoxide radical detection and rotating disk electrode measurement suggest that the two-step single-electron reduction of oxygen is the predominant reaction step during this photocatalytic H2O2 production process. The enhanced photocatalytic performance is ascribed to the formation of Schottky junction and subsequent built-in electric field at their interface, which accelerate the spatial charge separation and restrain the charge recombination. This work provides an in-depth understanding of the mechanism of photocatalytic H2O2 production, and gives ideas for the design of highly active materials for photocatalytic H2O2 production.
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Gong, J.-L., Wang, B., Zeng, G.-M., Yang, C.-P., Niu, C.-G., Niu, Q.-Y., Zhou, W.-J., & Liang, Y. (2009) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2008.09.072 · Cited by 1,057
Self-citationYang, Y., Zeng, Z., Zhang, C., Huang, D., Zeng, G., Xiao, R., Lai, C., Zhou, C., Guo, H., Xue, W., et al. (2018) · Chemical Engineering Journal · doi:10.1016/j.cej.2018.05.093 · Cited by 691
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Yang, C., Tan, Q., Li, Q., Zhou, J., Fan, J., Li, B., Sun, J., & Lv, K. (2020) · Applied Catalysis B: Environment and Energy · doi:10.1016/j.apcatb.2020.118738 · Cited by 616
Yang, Y., Li, X., Zhou, C., Xiong, W., Zeng, G., Huang, D., Zhang, C., Wang, W., Song, B., Tang, X., et al. (2020) · Water Research · doi:10.1016/j.watres.2020.116200 · Cited by 518
Self-citationYang, Y., Zeng, G., Huang, D., Zhang, C., He, D., Zhou, C., Wang, W., Xiong, W., Li, X., Li, B., et al. (2020) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2020.118970 · Cited by 412
Self-citationGao, K., Hou, L.-A., An, X., Huang, D., & Yang, Y. (2023) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2022.122150 · Cited by 270
Self-citationTi3C2 2D MXene: Recent Progress and Perspectives in Photocatalysis
Tang, R., Xiong, S., Gong, D., Deng, Y., Wang, Y., Su, L., Ding, C., Yang, L., & Liao, C. (2020) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.0c12905 · Cited by 259
Metadata
- Authors
- Yang, Y., Zeng, Z., Zeng, G., Huang, D., Xiao, R., Zhang, C., Zhou, C., Xiong, W., Wang, W., Cheng, M., Xue, W., Guo, H., Tang, X., & He, D.
- Venue
- Applied Catalysis B: Environmental
- Publisher
- Elsevier BV
- Published
- 2019-12
- Volume
- 258
- Pages
- 117956
- ISSN
- 0926-3373 (ISSN-L)
- OpenAlex
- W2958082971
- Cited by
- 680
- References
- 2
- FWCI
- 17.78
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Y., Zeng, Z., Zeng, G., Huang, D., Xiao, R., Zhang, C., Zhou, C., Xiong, W., Wang, W., Cheng, M., Xue, W., Guo, H., Tang, X., & He, D. (2019). Ti3C2 Mxene/porous g-C3N4 interfacial Schottky junction for boosting spatial charge separation in photocatalytic H2O2 production. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2019.117956
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