摘要
研究了富勒烯负载到介孔SiO2用作光敏剂。以CaCO3为模板制备了球形纳米介孔二氧化硅,采用SEM、EDS、XRD和氮气吸附法对样品进行形貌结构表征。实验结果表明:制备出的球形SiO2大小均匀,粒径约为100nm且具有介孔结构。以富勒烯C60为光敏剂,以γ-氨丙基三乙氧基硅烷(APTES)为硅烷偶联剂,将C60接枝到纳米球形介孔SiO2上。傅里叶红外FT-IR谱图显示在1 390cm-1及1 599cm-1处出现2处新的特征峰,分别对应C60骨架振动峰以及N—H特征伸缩振动峰,这表明C60成功接枝到SiO2上。电子自旋共振法(ESR)法以及化学探针紫外分光光度计法检测结果表明SiO2-APTES-C60材料在光照射条件下可以产生单线态氧,并通过相对检测法计算出量子效率为0.52。
In this research,fullerene was grated to mesoporous silica and was used for photosensitizer.A new type of mesoporous silica nanospheres（SiO2）has been fabricated with CaCO3as the template.SEM,EDS,XRD and N2adsorption-desorption isotherms were employed to characterize the as-prepared materials.The results demonstrated that the as-prepared spherical SiO2is about 100nm in size which exhibits mesopourous structure.Subsequently,fullerene C60was grated to SiO2by silane coupling agentγ-Triethoxysilylpropylamine（APTES）（denoted as SiO2-APTES-C60）.FT-IR spectroscopy results showed two characteristic absorption bands at 1 390cm-1 and 1 599cm-1,indicating that C60has been grated to SiO2successfully.The results of ESR and chemical method demostrated that the SiO2-APTES-C60has the ability to produce singlet oxygen under light excitation and the quantum yield is 0.52.
出处
《中国科技论文》
CAS
北大核心
2013年第9期892-895,共4页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20110010110002)
