CAJ | 학술논문

采用溶胶-凝胶法制备了氟、锌共掺杂 TiO2纳米晶光催化剂,分别利用 X 射线衍射(XRD)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)和紫外-可见(UV-Vis)漫反射光谱对样品进行表征,并通过降解亚甲基蓝实验评估了样品的光催化性能。XRD 与TEM表征结果表明,样品为锐钛矿相,平均粒径约16 nm。掺杂后,样品光吸收性能未得到显著改善,但其光催化活性却得到显著提高。掺杂离子 F-有利于光催化反应过程中羟基自由基的形成,样品光催化活性因而得到显著提高；共掺杂样品中,随着 Zn 掺杂量的增加,样品光催化活性呈现先增加后减小的变化趋势,Zn掺杂量为2%时,共掺杂样品的光催化性能最佳。
채용용효-응효법제비료불、자공참잡 TiO2납미정광최화제,분별이용 X 사선연사(XRD)、투사전자현미경(TEM)、X사선광전자능보(XPS)화자외-가견(UV-Vis)만반사광보대양품진행표정,병통과강해아갑기람실험평고료양품적광최화성능。XRD 여TEM표정결과표명,양품위예태광상,평균립경약16 nm。참잡후,양품광흡수성능미득도현저개선,단기광최화활성각득도현저제고。참잡리자 F-유리우광최화반응과정중간기자유기적형성,양품광최화활성인이득도현저제고；공참잡양품중,수착 Zn 참잡량적증가,양품광최화활성정현선증가후감소적변화추세,Zn참잡량위2%시,공참잡양품적광최화성능최가。
Fluorine and zinc co-doped nanocrystalline TiO2 were prepared by the sol-gel method and investigated by X-ray diffraction (XRD),transmission electron microscopy (TEM),X-ray photoelectron spectroscopy (XPS)and ultraviolet-visible (UV-Vis)diffuse reflectance spectroscopy,respectively.The photocatalytic per-formances of the samples were evaluated by photocatalytic degrading methylene blue.The XRD and TEM re-sults show that all the samples are compose of the anatase phase and the average grain sizes are about 1 6 nm. After the dopings,the absorption properties of the samples can not be obviously enhanced,but the photocata-lytic properties of the samples are all improved.The introduction of F- was beneficial to formation of hydroxyl radicals,resulting in the obvious photocatalytic activity enhancement of the sample.With the increase of Zn do-ping level,the photocatalytic activities of the codoped samples increase and then decrease,gradually.The best photocatalytic property was presented in the codoped sample with 2% Zn doping level.