稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
644-646
,共3页
溶胶-凝胶法%氮掺杂%光催化
溶膠-凝膠法%氮摻雜%光催化
용효-응효법%담참잡%광최화
sol-gel%nitrogen-doped%photocatalysis
采用溶胶-凝胶法,在电场热处理条件下,合成了晶粒度为50～60 nm的在可见光下具有较高催化活性的一种掺N的TiO_2薄膜.光催化实验表明:在可见光催化下,掺N薄膜对甲基橙溶液的催化活性大大提高了.通过XPS和XRD分析,确定了N在TiO_2中以取代O原子的形式存在,即薄膜中形成了非整比化合物TiO_(2-x)N_x,通过紫外可见光谱(UV-VIS)分析测试薄膜的透光率,观察到掺N薄膜的吸收截止波长为550 nm,说明吸收边发生了红移.以取代形式掺杂的N在窄化带隙和提高光催化活性方面具有重要的意义.
採用溶膠-凝膠法,在電場熱處理條件下,閤成瞭晶粒度為50～60 nm的在可見光下具有較高催化活性的一種摻N的TiO_2薄膜.光催化實驗錶明:在可見光催化下,摻N薄膜對甲基橙溶液的催化活性大大提高瞭.通過XPS和XRD分析,確定瞭N在TiO_2中以取代O原子的形式存在,即薄膜中形成瞭非整比化閤物TiO_(2-x)N_x,通過紫外可見光譜(UV-VIS)分析測試薄膜的透光率,觀察到摻N薄膜的吸收截止波長為550 nm,說明吸收邊髮生瞭紅移.以取代形式摻雜的N在窄化帶隙和提高光催化活性方麵具有重要的意義.
채용용효-응효법,재전장열처리조건하,합성료정립도위50～60 nm적재가견광하구유교고최화활성적일충참N적TiO_2박막.광최화실험표명:재가견광최화하,참N박막대갑기등용액적최화활성대대제고료.통과XPS화XRD분석,학정료N재TiO_2중이취대O원자적형식존재,즉박막중형성료비정비화합물TiO_(2-x)N_x,통과자외가견광보(UV-VIS)분석측시박막적투광솔,관찰도참N박막적흡수절지파장위550 nm,설명흡수변발생료홍이.이취대형식참잡적N재착화대극화제고광최화활성방면구유중요적의의.
The N-doping TiO_2 thin film with the grain size of 50～60 nm was synthesized by sol-gel process in electric field,it is a high visible-light-active photocatalyst. The result of the photocatalytic experiment showed that the N-doping film's vis-activity to the methyl orange rose largely. XPS and XRD analysis supplied that the doping N substituted the oxygen-deficient in TiO_2 film and the TiO_(2-x)N_x compound appeared. The Einstein shift in optical absorption spectrum of the N-doped film was also observed by the UV-VIS, and the cut wave length was about 550 nm. It is concluded that the N doping is effective to narrow the gap and enhance the photo catalysis.
