硅酸盐通报
硅痠鹽通報
규산염통보
BULLETIN OF THE CHINESE CERAMIC SOCIETY
2009年
6期
1182-1185
,共4页
李桂花%王安锋%苑便琴%任悄悄
李桂花%王安鋒%苑便琴%任悄悄
리계화%왕안봉%원편금%임초초
溶胶-凝胶法%纳米二氧化钛%共掺杂%光催化%亚甲基蓝
溶膠-凝膠法%納米二氧化鈦%共摻雜%光催化%亞甲基藍
용효-응효법%납미이양화태%공참잡%광최화%아갑기람
Sol-gel%TiO_2 nanopaticles%co-doping%photocatalysis%methylene blue
采用溶胶-凝胶法制备了Ce、Fe共掺杂的纳米TiO_2光催化剂.以节能灯为光源,考察了催化剂组成、催化剂加入量、反应温度等对其光催化降解亚甲基蓝性能的影响.结果表明:与不掺杂及Ce、Fe单掺杂相比,Ce-Fe共掺杂能明显提高纳米TiO_2在节能灯照射下的光催化活性.其中,Ce_(0.062)5Fe_(0.004)/TiO_2的催化效果最佳,当反应温度50 ℃,反应液pH值5.33,催化剂加入量0.313 g/L 时,4 h的降解率可达96.00%.XRD分析结果显示,催化活性较好的催化剂均为锐钛矿和金红石的混晶,晶粒尺寸在20～30 nm之间.
採用溶膠-凝膠法製備瞭Ce、Fe共摻雜的納米TiO_2光催化劑.以節能燈為光源,攷察瞭催化劑組成、催化劑加入量、反應溫度等對其光催化降解亞甲基藍性能的影響.結果錶明:與不摻雜及Ce、Fe單摻雜相比,Ce-Fe共摻雜能明顯提高納米TiO_2在節能燈照射下的光催化活性.其中,Ce_(0.062)5Fe_(0.004)/TiO_2的催化效果最佳,噹反應溫度50 ℃,反應液pH值5.33,催化劑加入量0.313 g/L 時,4 h的降解率可達96.00%.XRD分析結果顯示,催化活性較好的催化劑均為銳鈦礦和金紅石的混晶,晶粒呎吋在20～30 nm之間.
채용용효-응효법제비료Ce、Fe공참잡적납미TiO_2광최화제.이절능등위광원,고찰료최화제조성、최화제가입량、반응온도등대기광최화강해아갑기람성능적영향.결과표명:여불참잡급Ce、Fe단참잡상비,Ce-Fe공참잡능명현제고납미TiO_2재절능등조사하적광최화활성.기중,Ce_(0.062)5Fe_(0.004)/TiO_2적최화효과최가,당반응온도50 ℃,반응액pH치5.33,최화제가입량0.313 g/L 시,4 h적강해솔가체96.00%.XRD분석결과현시,최화활성교호적최화제균위예태광화금홍석적혼정,정립척촌재20～30 nm지간.
Ce-Fe co-doped TiO_2 nanopaticles were prepared via Sol-gel process and their decolorization performance of methylene blue under energy saving lamp were investigated. The effects of catalyst composition,catalyst concentration and reaction temperature on their photocatalytic performance were studied. The results indicated that Ce-Fe co-doped TiO_2 showed markedly higher photocatalytic activity than that of TiO_2 and Ce or Fe single doped TiO_2. TiO_2 co-doped with 0.0625% Ce and 0.004% Fe showed the highest photocatalytic efficiency. And using this catalyst when the catalyst concentration was 0.313 g/L,the reaction temperature was 50 ℃ and pH was 5.33 the degradation rate in 4 h could reached 96.00%. XRD characterizing indicated that emulsion of anatase and rutile had better photocatalytic activity and their diameters were between 20 to 30 nm.
