CAJ | 학술논문

采用溶胶-凝胶法将掺钕二氧化钛负载在二氧化硅上制备复合光催化剂(Nd/TiO2-SiO2),利用XRD、SEM、FT-IR和DRS对Nd/TiO2-SiO2进行表征,并通过甲基橙溶液的光催化降解评价其光催化性能.结果表明:Nd/TiO2-SiO2在可见光区388-619 nm范围内的光吸收性能随着钕掺杂量的增大而增强,钕掺杂有利于降低电子-空穴的复合率,钕和二氧化硅提高TiO2的光催化活性.在600℃煅烧的0.1% Nd/TiO2-SiO2的光催化活性最高,lh后甲基橙降解率为82.9%.
채용용효-응효법장참녀이양화태부재재이양화규상제비복합광최화제(Nd/TiO2-SiO2),이용XRD、SEM、FT-IR화DRS대Nd/TiO2-SiO2진행표정,병통과갑기등용액적광최화강해평개기광최화성능.결과표명:Nd/TiO2-SiO2재가견광구388-619 nm범위내적광흡수성능수착녀참잡량적증대이증강,녀참잡유리우강저전자-공혈적복합솔,녀화이양화규제고TiO2적광최화활성.재600℃단소적0.1% Nd/TiO2-SiO2적광최화활성최고,lh후갑기등강해솔위82.9%.
Neodymium doping titania was loaded to silicon dioxide to prepare Nd/TiO2-SiO2 by sol-gel method and Nd/TiO2-SiO2 was characterized by X-ray diffractometry (XRD),scanning electron microscopy (SEM),Fourier transform-infrared spectroscopy (FT-IR) and diffuse reflectance spectra (DRS).Photocatalytic activities of Nd/TiO2-SiO2 with different neodymium contents were evaluated by degradation of methyl orange.The light absorption of Nd/TiO2-SiO2 increased with increasing doping neodymium in a visible light range of 388-619 nm,and Nd doping was in favor of decreasing the recombination of photo-generated electrons with holes.Nd and SiO2 improved the photocatalytic activity of TiO2.The optimal molar fraction of Nd to Ti was 0.1％,and the optimum calcination temperature was 600 ℃.The highest degradation rate of methyl orange was 82.9％ after irradiation for 1 h.