CAJ | 학술논문

在外加强磁场条件下,采用溶胶-凝胶法制备了镍离子掺杂二氧化钛光催化剂,并进行紫外光下降解甲基橙溶液的实验,考查了磁感应强度对光催化剂催化活性的影响。借助XRD、EDS、SEM、IR及PL等手段对掺杂催化剂结构进行了表征。结果表明：外加强磁场使催化剂的粒径减小,颗粒分布均匀,利于镍离子掺杂进入二氧化钛内部,降低了催化剂的带隙能,同时又降低了电子空穴对复合率,提高了催化剂的电子-空穴对分离效率,增大了光催化活性,且随着磁感应强度的增加,催化剂的光催化活性逐渐增大。
재외가강자장조건하,채용용효-응효법제비료얼리자참잡이양화태광최화제,병진행자외광하강해갑기등용액적실험,고사료자감응강도대광최화제최화활성적영향。차조XRD、EDS、SEM、IR급PL등수단대참잡최화제결구진행료표정。결과표명：외가강자장사최화제적립경감소,과립분포균균,리우얼리자참잡진입이양화태내부,강저료최화제적대극능,동시우강저료전자공혈대복합솔,제고료최화제적전자-공혈대분리효솔,증대료광최화활성,차수착자감응강도적증가,최화제적광최화활성축점증대。
Photocatalyst of Ni2＋-doped nano-TiO2 was prepared by sol-gel method,at different magnetic field intensity.Photocatalytic activity was tested under UV irradiation for methyl orange degradation.The structure and properties of the doped nanoparticles were characterized by X-ray diffraction（XRD）,electronic data systems（EDS）,scanning electron microscope（SEM）,fourier transform infrared spectroscopy（FTIR） and photoluminescence spectra（PL） respectively.The result indicated that outside strengthens the magnetic field to cause the material the particle size to reduce,the pellet distribution is even,favors the Nickel ion doping to enter in TiO2,reduced the TiO2 band gap energy,also reduced the electron-hole pair compound rate,raised the catalyst electron-hole pair separation efficiency,caused to increase the photocatalytic activity of sample.And the photocatalytic activity of sample increase with the increase of magnetic field intensity.