Zen Junhao, Zhang Di, Dou Guoliang, Zeng Qingming, Zhang Jian
Shandong Engineering Research Center for High Performance Silicone Rubber Weifang 261000 P. R. China
Department of Chemistry and Chemical Engineering, Jining University Qufu 273100 P. R. China.
RSC Adv. 2024 Nov 22;14(50):37546-37553. doi: 10.1039/d4ra07087a. eCollection 2024 Nov 19.
A series of MC/P25 composite aerogels (MCAPs) were newly designed by the sol-gel method and CO supercritical drying technology. Under visible light irradiation, the optimized MCAP exhibits enhanced photocatalytic performance with a AO7 degradation rate of 0.01746 min, which is 6.6 times higher than that of P25. The enhanced photocatalytic performance can be mainly ascribed to the constructed H-bonds between microcrystalline cellulose and P25. Photocurrent-time curves and photoluminescence spectra all certified the increased photogenerated carrier transfer rates of MCAP due to the presence of H-bonds. This work indicates that the presence of H-bonds can efficiently transfer photo-induced electrons and limit the recombination of photogenerated carriers. Furthermore, as a 3D aerogel photocatalyst, the photocatalytic stability is improved.
通过溶胶-凝胶法和CO超临界干燥技术新设计了一系列MC/P25复合气凝胶（MCAPs）。在可见光照射下，优化后的MCAP表现出增强的光催化性能，AO7降解速率为0.01746 min，比P25高6.6倍。增强的光催化性能主要归因于微晶纤维素与P25之间形成的氢键。光电流-时间曲线和光致发光光谱均证实了由于氢键的存在，MCAP的光生载流子转移速率增加。这项工作表明，氢键的存在可以有效地转移光生电子并限制光生载流子的复合。此外，作为一种三维气凝胶光催化剂，其光催化稳定性得到了提高。
