Department of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
Nanoscale. 2013 Jul 21;5(14):6327-32. doi: 10.1039/c3nr01329d. Epub 2013 Jun 11.
Uniform SiO2@CdS mesoporous nanospheres with an average diameter of 300 nm have been synthesized successfully by a facile process. The as-prepared mesoporous composite nanospheres have a BET-specific surface area of 640 m(2) g(-1) and an average pore size of 2.82 nm. The results demonstrated that more than 60% Rhodamine B (RhB) dye in solution (4.8 mg L(-1), 50 mL) could be removed by adsorption in the dark for 30 min using the as-prepared SiO2@CdS mesoporous nanospheres (40 mg). The as-prepared SiO2@CdS mesoporous nanospheres have a mesoporous nanostructure, suggesting a higher specific surface area and resulting in a strong adsorption ability. In addition, the mesoporous silica was decorated with ca. 5 nm CdS nanocrystals, which showed excellent photocatalytic activity under visible light and could rapidly remove most of the RhB molecules from a pollutant solution under visible light irradiation. Furthermore, the mesoporous SiO2@CdS nanospheres synthesized by the present protocol exhibited excellent antibacterial activity.
成功通过一种简易的方法合成了具有 300nm 平均直径的均一的 SiO2@CdS 介孔纳米球。所制备的介孔复合纳米球具有 640m2/g 的 BET 比表面积和 2.82nm 的平均孔径。结果表明，使用制备的 SiO2@CdS 介孔纳米球（40mg），在黑暗中吸附 30min 可以去除溶液中（4.8mg/L，50mL）超过 60%的罗丹明 B（RhB）染料。所制备的 SiO2@CdS 介孔纳米球具有介孔纳米结构，表明具有更高的比表面积，从而导致具有很强的吸附能力。此外，介孔二氧化硅被约 5nm 的 CdS 纳米晶体修饰，在可见光下表现出优异的光催化活性，并在可见光照射下能迅速将污染物溶液中的大部分 RhB 分子去除。此外，通过本方案合成的介孔 SiO2@CdS 纳米球具有优异的抗菌活性。
