Journal
RSC ADVANCES
Volume 12, Issue 17, Pages 10258-10266Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra01093c
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Funding
- National Natural Science Foundation of China (NSFC) [22175007, 52172080, 21975007]
- National Natural Science Foundation for Outstanding Youth Foundation
- Fundamental Research Funds for the Central Universities
- National Program for Support of Top-notch Young Professionals
- 111 project [B14009]
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TiO2/g-C3N4 composite photocatalysts have potential applications in clean energy production and organic pollutant removal. Coating a continuous g-C3N4 layer on TiO2 fibers to form a core/shell structure enhances the separation and transit efficiency of photo-induced carriers. The prepared porous TiO2@g-C3N4 core/shell composite exhibits excellent photocatalytic performance.
TiO2/g-C3N4 composite photocatalysts with various merits, including low-cost, non-toxic, and environment friendliness, have potential application for producing clean energy and removing organic pollutants to deal with the global energy shortage and environmental contamination. Coating a continuous g-C3N4 layer on TiO2 fibers to form a core/shell structure that could improve the separation and transit efficiency of photo-induced carriers in photocatalytic reactions is still a challenge. In this work, porous TiO2 (P-TiO2)@g-C3N4 fibers were prepared by a hard template-assisted electrospinning method together with the g-C3N4 precursor in an immersing and calcination process. The continuous g-C3N4 layer was fully packed around the P-TiO2 fibers tightly to form a TiO2@g-C3N4 core/shell composite with a strong TiO2/g-C3N4 heterojunction, which greatly enhanced the separation efficiency of photo-induced electrons and holes. Moreover, the great length-diameter ratio configuration of the fiber catalyst was favorable for the recycling of the catalyst. The P-TiO2@g-C3N4 core/shell composite exhibited a significantly enhanced photocatalytic performance both in H-2 generation and dye degradation reactions under visible light irradiation, owing to the specific P-TiO2@g-C3N4 core/shell structure and the high-quality TiO2/g-C3N4 heterojunction in the photocatalyst. This work offers a promising strategy to produce photocatalysts with high efficiency in visible light through a rational structure design.
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