Journal
CHEMOSPHERE
Volume 285, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.131429
Keywords
TiO2/Ti3C2/g-C3N4; Ti3C2 MXene; Hydrogen evolution; Photocatalyst
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Funding
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [104.03-2018.344]
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The research utilized the titanium atom from Ti3C2 MXene to develop TiO2, forming a close heterostructure with semiconductors, while the high surface area of amorphous g-C3N4 contributed to light harvesting during photocatalytic activity. The optimized TTC-450 heterostructure demonstrated a higher H-2 generation efficiency compared to pure g-C3N4 and other samples.
Photocatalytic hydrogen (H-2) generation derived by water has been considered as a renewable energy to solve environmental problems and global energy crises. Thus, it is necessary to explore the most effective photo catalysts by using multi-cocatalysts, due to an intimate interaction between different components. Therefore, we already synthesized the TiO2/Ti3C2/g-C3N4 (TTC) photocatalyst from g-C3N4 and Ti3C2 MXene via a calcination technique, and applied this composite for H-2 evolution. By making use of titanium atom from Ti3C2 MXene, titanium dioxide (TiO2) was in-body developed, which leads to form a close heterostructure between metallic material and semiconductors. Besides, g-C3N4 amorphous with highly surface area also contributes to harvest light irradiation during photocatalytic activity. The optimized TTC-450 heterostructure showed a super H-2 generation efficiency than those of pure g-C3N4 and other samples. Besides, TTC-450 sample also exhibited great recyclability after 4 runs. The proposed mechanism illustrates the efficient movement of generated electrons in TTC system, which leads to high H-2 evolution efficiency. Moreover, the obtained results consistently emphasize the TiO2/Ti3C2/g-C3N4 composite would be a unique material for H-2 production and broaden applications of MXene materials.
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