摘要
采用溶胶-超声空化技术同步合成了生物质多元自掺杂TiO_2复合催化剂,通过场发射扫描电镜(FESEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-vis)、傅里叶变换红外光谱(FT-IR)、光致发光光谱(PL)等对样品进行了表征分析。结果表明,复合催化剂实现了C、N、P、Cl、K等元素的同步掺杂,合成了多元共掺杂复合TiO_2;相比纯TiO_2,复合催化剂的禁带宽度窄化了0.21 e V,表面羟基与活性位点增多,光生载流子复合几率降低,结晶度提高,比表面积增大。以亚甲基蓝(MB)为目标污染物,研究了复合催化剂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2 h时,复合催化剂对亚甲基蓝的降解效率最高可达98%。
The biomass multi-elements self-doped TiO2 was synthesized simultaneously by ultrasonic irradiation assisted sol-gel method,and characterized by field emission scanning electron microscopy(FESEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),UV-Vis diffuse reflectance spectroscopy(UV-Vis-DRS),Fourier transform infrared(FT-IR)spectroscopy,and photoluminescence(PL).The characterization results showed that,multiple elements,C,N,P,Cl and K,were doped in the composite TiO2.Compared with pure TiO2,the band gap of the composite catalyst was narrowed by 0.21 eV,and possessed more surface hydroxyl radical and active sites,lower recombination rate of photo-generated carriers,higher crystallinity and higher specific surface area.The photocatalytic ability of the composite catalyst was studied,using methylene blue(MB)as target pollutant.The experimental results showed that,under visible light irradiation,the degradation efficiency of methylene blue was up to 98%after photocatalytic reaction for two hours by the composite catalyst.
作者
赵林
李碧榕
陈长樑
王鑫
谢艳招
刁勇
ZHAO Lin;LI Bi-Rong;CHEN Zhang-Liang;WANG Xin;XIE Yan-Zhao;DIAO Yong(School of Biomedical Sciences,Huaqiao University,Quanzhou 362021,China;Minnan Science and Technology Institute,Fujian Normal University,Quanzhou 362332,China)
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2018年第3期364-372,共9页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金项目(No.U1405215)
福建省教育厅科技类(产学研)项目(No.JAT160671)
福建省泉州市科技局项目(No.2016G061)资助~~
关键词
同步合成
多元自掺杂
二氧化钛
光催化
表征分析
Simultaneous synthesis
Multi-elements self-doped
Titanium dioxide
Photocatalysis
Characterization
