Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences , P.O. Box 1126, 230031 Hefei, P. R. China.
ACS Appl Mater Interfaces. 2013 Dec 11;5(23):12735-43. doi: 10.1021/am404123z. Epub 2013 Nov 22.
Water-soluble magnetic-functionalized graphitic carbon nitride (g-C3N4) composites were synthesized successfully by in situ decorating spinel ZnFe2O4 nanoparticles on g-C3N4 sheets (CN-ZnFe) through a one-step solvothermal method. The magnetic properties of CN-ZnFe can be effectively controlled via tuning the coverage density and the size of ZnFe2O4 nanoparticles. The results indicate that the CN-ZnFe exhibits excellent photocatalytic efficiency for methyl orange (MO) and fast separation from aqueous solution by magnet. Interestingly, the catalytic performance of the CN-ZnFe is strongly dependent on the loading of ZnFe2O4. The optimum activity of 160CN-ZnFe photocatalyst is almost 6.4 and 5.6 times higher than those of individual g-C3N4 and ZnFe2O4 toward MO degradation, respectively. By carefully investigating the influence factors, a possible mechanism is proposed and it is believed that the synergistic effect of g-C3N4 and ZnFe2O4, the smaller particle size, and the high solubility in water contribute to the effective electron-hole pairs separation and excellent photocatalytic efficiency. This work could provide new insights that g-C3N4 sheets function as good support to develop highly efficient g-C3N4-based magnetic photocatalysts in environmental pollution cleanup.
水相合成磁性功能化石墨相氮化碳（g-C3N4）复合材料，通过一步溶剂热法将尖晶石 ZnFe2O4 纳米粒子原位修饰在 g-C3N4 片上（CN-ZnFe）。CN-ZnFe 的磁性可以通过调节 ZnFe2O4 纳米粒子的覆盖密度和尺寸来有效控制。结果表明，CN-ZnFe 对甲基橙（MO）具有优异的光催化效率，并可通过磁体快速从水溶液中分离。有趣的是，CN-ZnFe 的催化性能强烈依赖于 ZnFe2O4 的负载量。160CN-ZnFe 光催化剂的最佳活性分别比单独的 g-C3N4 和 ZnFe2O4 对 MO 降解的活性高约 6.4 和 5.6 倍。通过仔细研究影响因素，提出了一种可能的机制，据信 g-C3N4 和 ZnFe2O4 的协同效应、较小的颗粒尺寸和高水溶性有助于有效电子-空穴对分离和优异的光催化效率。这项工作可以提供新的见解，即 g-C3N4 片作为良好的载体，可用于开发高效的基于 g-C3N4 的磁性光催化剂，用于环境污染治理。
