Ti3C2 Mxene/porous g-C3N4 interfacial Schottky junction for boosting spatial charge separation in photocatalytic H2O2 production
By Yang Yang, Zhuotong Zeng, Guangming Zeng, Danlian Huang, Rong Xiao, Chen Zhang, Chengyun Zhou, Weiping Xiong, Wenjun Wang, Min Cheng and 4 more. 2019
560 citations recorded by the source corpus.
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.
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/2d6d87b6e37b09dc5dd043cad784179c520d25c0
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In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Carbon nitride nanotubes with in situ grafted hydroxyl groups for highly efficient spontaneous H2O2 production (2021, background): “4 Hydrogen Peroxide (H2O2) is widely used in biological processes, environmental remediation, and more broadly in the chemical industry [1,2].”