CAJ | 학술논문

采用微波辅助溶胶-凝胶法制备了 Yb,N 共掺杂的纳米(Yb,N)-TiO 2光催化剂,通过 XRD、XPS、UV-Vis-DRS、PL 等对(Yb,N)-TiO 2样品进行了表征和分析,并以亚甲基蓝(MB)作为目标降解物,考察了不同 Yb 掺杂浓度的(Yb,N)-TiO 2对 MB 的光催化降解效果.结果表明,Yb 和 N 的掺入减小了 TiO 2的禁带宽度,降低了光生电子-空穴对的复合,使其吸收光谱的阈值波长红移至可见光区,提高了 TiO 2的光催化活性.当 pH 值＝1．5、m (H 2 NCONH 2)＝10 g、热处理温度为650℃、n (Yb)∶n (Ti)＝0．005时,(Yb,N)-TiO 2粉体在普通日光灯下对亚甲基蓝在5 h 内的光催化降解效率达93．55％,明显高于同等条件下 P25的降解率45．72％.
채용미파보조용효-응효법제비료 Yb,N 공참잡적납미(Yb,N)-TiO 2광최화제,통과 XRD、XPS、UV-Vis-DRS、PL 등대(Yb,N)-TiO 2양품진행료표정화분석,병이아갑기람(MB)작위목표강해물,고찰료불동 Yb 참잡농도적(Yb,N)-TiO 2대 MB 적광최화강해효과.결과표명,Yb 화 N 적참입감소료 TiO 2적금대관도,강저료광생전자-공혈대적복합,사기흡수광보적역치파장홍이지가견광구,제고료 TiO 2적광최화활성.당 pH 치＝1．5、m (H 2 NCONH 2)＝10 g、열처리온도위650℃、n (Yb)∶n (Ti)＝0．005시,(Yb,N)-TiO 2분체재보통일광등하대아갑기람재5 h 내적광최화강해효솔체93．55％,명현고우동등조건하 P25적강해솔45．72％.
Ytterbium and nitrogen co-doped TiO 2 photocatalysts which could degrade methyl blue (MB)under visible light irradiation were prepared by sol-gel method combined with microwave chemical synthesis.Samples were characterized by XRD,XPS,UV-Vis-DRS and PL.The results show that Yb,N co-doped narrowed the band gap and inhibited the recombination of photogenerated electron-hole pairs.The band-gap energy absorption edge shifted to longer wavelength,thus the photocatalytic activity is improved.Results of degradation revealed that the (Yb,N)-TiO 2 has shown much more photocatalytic activity than the P25 when the preparation condi-tion is as follows:sintered temperature T =650 ℃,pH=1.5,m (H 2 NCONH 2 )=10 g,n (Yb)∶n (Ti)=0.005.