Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P.R. China.
Appl Spectrosc. 2010 May;64(5):552-7. doi: 10.1366/000370210791211718.
Iron tetra-carboxyl phthalocyanine (TCFePc) was covalently immobilized to the surface of core-shell magnetite silica nanoparticles (NPs) as facilely separated supported catalyst, namely P-M SiO(2) NPs, for catalyzing the degradation of organic pollutants in aqueous solution under visible light irradiation. X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy (SEM), superconducting quantum interference device (SQUID), and ultraviolet-visible (UV-Vis) spectroscopy were used to characterize the sample. The photocatalytic activity of P-M SiO(2) NPs was determined using rhodamine B (RhB) and methyl orange (MO) as the objective decomposition substances. The results revealed that the novel supported catalyst exhibited good catalytic activity over a wide pH range, and the degradation rate of RhB and MO is up to 90% during 120 min of reaction. Moreover, it is noteworthy that the catalyst can be easily separated using an external magnetic field and employed directly for the next round of reaction.
四羧基铁酞菁（TCFePc）通过共价键固定在核壳型磁铁矿二氧化硅纳米颗粒（NPs）的表面，作为易于分离的负载型催化剂，即 P-M SiO(2) NPs，用于在可见光照射下催化水溶液中有机污染物的降解。采用 X 射线衍射、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、超导量子干涉装置（SQUID）和紫外-可见（UV-Vis）光谱对样品进行了表征。以罗丹明 B（RhB）和甲基橙（MO）为目标分解物，测定了 P-M SiO(2) NPs 的光催化活性。结果表明，新型负载型催化剂在较宽的 pH 范围内表现出良好的催化活性，在 120 分钟的反应时间内，RhB 和 MO 的降解率高达 90%。此外，值得注意的是，催化剂可以通过外加磁场很容易地分离出来，并直接用于下一轮反应。
