期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 11, 期 19, 页码 6401-6410出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cy00991e
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资金
- Madan Mohan Malviya University of Technology, Gorakhpur
- Korea Basic Science Institute (KBSI) National Research Facilities & Equipment Center (NFEC) - Korean government (Ministry of Education) [2019R1A6C1010005]
Graphitic carbon nitride (g-C3N4) is a promising two-dimensional semiconductor material, and doping with sulfur to form S-g-C3N4 has improved light absorption capabilities. The composite material EY-S-g-C3N4, formed by combining Eosin Y with S-g-C3N4, shows enhanced light-harvesting abilities and excellent efficiency in organic transformations based on photoinduced conversion.
Graphitic carbon nitride (g-C3N4) is a promising two-dimensional semiconducting material that has shown potential for various applications in the field of photocatalysts due to its thermal stability and excellent electronic properties. However, pristine g-C3N4 has a wide optical band gap, which limits the active absorption of solar light in the spectral region below 420 nm. One way to improve the optical character is by doping with a sulfur heteroatom to make sulfur-doped g-C3N4 (S-g-C3N4), which has a smaller band gap relative to the pristine g-C3N4. Herein, we have developed a new type of S-g-C3N4 composite incorporating eosin-Y (EY-S-g-C3N4) by employing the co-polymerization approach between eosin-Y (EY) and S-g-C3N4. In this composite, eosin-Y moieties act as external photosensitizing groups. The optical characteristics of EY-S-g-C3N4 were investigated using density functional theory, various optical spectroscopies, and various imaging techniques. From those characterizations, it was found that the appearance of the charge-transfer state in the low band gap regime improved the light-harvesting ability relative to the g-C3N4 and S-g-C3N4. The use of the EY-S-g-C3N4 photocatalyst for the regeneration of NADH and NADPH showed quite excellent efficiencies of 64.38% and 81.14%, respectively. In addition, it showed the high conversion efficiency of sulfide to sulfoxide with an yield of 99.6%. This research highlights the potential application of the EY-S-g-C3N4 composite in the field of organic transformation based on photoinduced conversion.
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