CAJ | 학술논문

采用超声辅助溶胶-凝胶法制备了 La、Fe共掺杂TiO2/膨润土复合光催化材料。采用X射线衍射(XRD)、傅里叶变换红外(FT-IR)光谱和紫外-可见漫反射吸收光谱(DRS)等测试技术对其进行了表征分析。在紫外光照射下,通过对 TNT 废水的光催化降解,考察其光催化活性。结果表明,La、Fe的共掺杂抑制了 TiO2的晶型转变和晶粒生长,增强了复合材料的吸光性能；适量的 La、Fe 共掺杂能提高复合材料的光催化性能,当 La 与 Fe 的掺杂量分别为0.5%和0.05%(摩尔分数),煅烧温度为400℃时,其光催化活性达到最佳效果。
채용초성보조용효-응효법제비료 La、Fe공참잡TiO2/팽윤토복합광최화재료。채용X사선연사(XRD)、부리협변환홍외(FT-IR)광보화자외-가견만반사흡수광보(DRS)등측시기술대기진행료표정분석。재자외광조사하,통과대 TNT 폐수적광최화강해,고찰기광최화활성。결과표명,La、Fe적공참잡억제료 TiO2적정형전변화정립생장,증강료복합재료적흡광성능；괄량적 La、Fe 공참잡능제고복합재료적광최화성능,당 La 여 Fe 적참잡량분별위0.5%화0.05%(마이분수),단소온도위400℃시,기광최화활성체도최가효과。
Lanthanum and iron co-doped TiO2/bentonite composite photocatalyst was prepared by ultrasonic-as-sisted sol-gel method.The micro-structure of materials were characterized by means of X-ray diffraction,IR spectroscopy and UV-Vis absorption spectroscopy respectively.The activity of composite photocatalyst was e-valuated by degradation of 2,4,6-trinitrotoluene(TNT).The results showed that lanthanum and iron co-doped could restrain the growing of the grain size and depress the change of the anatase phase.The absorption intensi-ties of lanthanum and iron co-doped TiO2/bentonite increased.Appropriate quantity of lanthanum and iron could enhace the photocatalytic activities of TiO2/bentonite composite photocatalyst.The photocatalystic activi-ty of the lanthanum and iron co-doped TiO2/bentonite composite photocatalyst doped with 0.5at% of lantha-num,0.05at% of iron and calcined under 400℃ was the best.