生物质C-N-P自掺杂TiO_2的合成及其对亚甲基兰的光催化降解活性  

Synthesis of C-N-P co-doped TiO_2 Composite with Biomass as Dopant and Its Photocatalytic Activity in the Degradation of Methylene Blue

作　　者：谢艳招[1] 曾丽珍 仲亮 杨倩影 赵林[1,2] 刁勇 

机构地区：[1]福建师范大学闽南科技学院,福建泉州362332 [2]华侨大学生物医学学院,福建泉州362021

出　　处：《分子催化》2017年第6期513-522,共10页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金资助项目(U1405215);福建省教育厅科技类(产学研)项目(JAT160671);福建省泉州市科技局项目(2016G061)~~

摘　　要：采用溶胶-超声辐照技术同步合成了生物质C-N-P自掺杂TiO_2复合催化剂,通过X射线光电子能谱(XPS)、X射线衍射(XRD)、扫描电子显微镜(FESEM)、紫外-可见漫反射光谱(UV-Vis-DRS)及光致发光光谱(PL)对样品进行了表征.以亚甲基兰(MB)为目标污染物,研究了C-N-P共掺杂TiO_2的可见光光催化性能.实验结果表明,在可见光照射下,光催化反应时间为2 h时,C-N-P共掺杂TiO_2复合催化剂对亚甲基兰的降解效率最高可达9 8.5%;相比纯TiO_2,C-N-P共掺杂TiO_2复合催化剂的比表面积增大,吸收边带红移,禁带宽度减小,相变温度升高,光生载流子复合率降低.The C-N-P co-doped TiO2 composite was synthesized synchronously by sol-ultrasonic cavitation technology using biomass as dopant, and characterized by X-ray photoelectron spectroscopy （XPS）, X-ray diffraction（XRD）, field emission scanning electron microscopy （FESEM）, UV-Vis diffuse reflectance spectroscopy （UV-Vis-DRS）, photoluminescence （PL）. The visible light photocatalytic activity of the C-N-P co-doped TiO2 was evaluated using methylene blue （MB） as the target pollutant. The results showed, after 2 hours of photocatalytic reaction under visible light, the degradation efficiency of methylene blue was up to 98.5% catalyzed by C-N-P co-doped TiO2 composite; Compared with pure TiO2, C-N-P co-doped TiO2 composite possess larger specific surface area, absorption edge red shifting, smaller band gap, higher phase-transition temperature and lower recombination rate of photo-generated carriers, that differences are beneficial to the improvement of catalytic activity.

关 键 词：共掺杂 TIO2 超声辐照 光催化 禁带宽度 亚甲基兰 

分 类 号：O643[理学—物理化学] O644[理学—化学]