CAJ | 학술논문

以硝酸钇和钛酸四丁酯为原料,采用溶胶-凝胶法制备了Y-TiO2光催化剂粉体。以 XRD、DSC-TGA、FT-Raman、UV-Vis、PL 等手段对样品进行表征,研究了不同制备条件对样品性能的影响,并以亚甲基蓝(MB)作为目标降解物,研究了其光催化性能。结果表明,钇掺杂可以减缓样品由锐钛矿相向金红石相的转变,拓展了TiO2在可见光区的光谱响应范围,降低了光生电子和空穴的复合几率；当 Y∶TiO2的摩尔比为0.6%,500℃条件下焙烧4 h 制备的样品催化性能最好,在普通日光灯下3 h 内对 MB 的降解率达97.32%,显著高于同等实验条件下的 Degussa P25(58.62%)。
이초산을화태산사정지위원료,채용용효-응효법제비료Y-TiO2광최화제분체。이 XRD、DSC-TGA、FT-Raman、UV-Vis、PL 등수단대양품진행표정,연구료불동제비조건대양품성능적영향,병이아갑기람(MB)작위목표강해물,연구료기광최화성능。결과표명,을참잡가이감완양품유예태광상향금홍석상적전변,탁전료TiO2재가견광구적광보향응범위,강저료광생전자화공혈적복합궤솔；당 Y∶TiO2적마이비위0.6%,500℃조건하배소4 h 제비적양품최화성능최호,재보통일광등하3 h 내대 MB 적강해솔체97.32%,현저고우동등실험조건하적 Degussa P25(58.62%)。
Yttrium doped TiO2 photocatalysts were synthesized by sol-gel process using yttrium nitrate and tetra-butyl titanate as precursors and characterized by XRD,DSC-TGA,FT-Raman,UV-Vis and PL methods.The in-fluences of different preparation condition on properties were studied.The photocatalytic activity of Y-TiO2 was investigated by measuring the degradation rate of methylene-blue (MB)under the irradiation of fluorescent lamp.The results show that yttrium doping can not only inhibit the phase transition of anatase to rutile but also broaden the absorption region to visible light and inhibit the recombination of the photo-generated electrons and holes.The photocatalytic activity of the sample with molar ratio of Y∶TiO2=0.6% and sintered at 500 ℃ for 4 h was the best under the irradiation of fluorescent light,it was 97.32% within 3 h and significantly higher than that of Degussa P25(58.62%)under the same experimental conditions.