最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
Ag-TiO2/SnO2納米薄膜的制備及其光催化降解羅丹明B的性能
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:


Preparation and Photocatalytic Activity for Rhodamine B of Ag-TiO2/SnO2 Thin Films
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻
    • |
  • 相似文獻
    • |
  • 引證文獻
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    以光還原法沉積Ag修飾TiO2/SnO2，制備Ag-TiO2/SnO2納米薄膜，討論紫外光照時間、光照強度、AgNO3濃度等工藝條件對光催化活性的影響。用XRD和SEM對薄膜的結構、表面形貌和化學組成進行表征，以羅丹明B為模擬污染物對光催化性能進行測定。結果表明，最佳條件下制備的Ag-TiO2/SnO2薄膜，Ag擔載量為0.51%(at%), Ag簇直徑在30～90 nm之間。薄膜具有較高的光催化活性，對羅丹明B的降解率是修飾前TiO2/SnO2薄膜的1.92倍，是相同質量TiO2/ITO薄膜的2.54倍。催化活性的提高，源于反應機制的改變。薄膜中Ag-TiO2異質結的引入，一方面進一步促使光生電荷分離，另一方面加速了氧氣與激發(fā)電子的還原反應

    Abstract:

    Silver-modified TiO2/SnO2 thin films (Ag-TiO2/SnO2 thin films) were prepared by the photodeposition method. The effects of preparation conditions on the photocatalytic activity of Ag-TiO2/SnO2 thin films were discussed. The surface morphology, chemical composition and structure of the films were characterized by SEM and XRD, and its photocatalytic properties were evaluated with Rhodamine B as model compound. The results show that the optimum content of Ag on the film surface was 0.51at% and the diameter of Ag particles was about 30~90 nm. The photocatalytic degradation rate of Ag-TiO2/SnO2 film is 1.92 times and 2.54 times higher than the TiO2/SnO2 film and the TiO2/ITO film, respectively, mainly duo to the change in the reaction mechanism. The heterojunction of Ag-TiO2 in Ag-TiO2/SnO2 film efficiently promoted the separation of charges and accelerated the reaction of excited electrons and oxygen relatively to TiO2/SnO2 film in photocatalytic degradation for Rhodamine B

    參考文獻
    相似文獻
    引證文獻
引用本文

李愛昌,崔志鵬,李文菊. Ag-TiO2/SnO2納米薄膜的制備及其光催化降解羅丹明B的性能[J].稀有金屬材料與工程,2009,38(2):303~308.[Li Aichang, Cui Zhipeng, Li Wenju. Preparation and Photocatalytic Activity for Rhodamine B of Ag-TiO2/SnO2 Thin Films[J]. Rare Metal Materials and Engineering,2009,38(2):303~308.]
DOI：[doi]

復制
文章指標
  • 點擊次數:
  • 下載次數:
  • HTML閱讀次數:
  • 引用次數:
歷史
  • 收稿日期:2008-01-28
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: