• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Atomic layer deposited TiO2 films in photodegradation of aqueous salicylic acid
【24h】

Atomic layer deposited TiO2 films in photodegradation of aqueous salicylic acid

机译：水杨酸水溶液光降解过程中原子层沉积的TiO2薄膜

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Degradation of salicylic acid(SA)with thin film photocatalyst,titanium dioxide(TiO2),combined with ultraviolet(UV)radiation was studied.Photocatalysts were prepared on glass or silica substrate by atomic layer deposition(ALD)technique.The impact of initial SA concentration(10 and 75 mg/l)and pH(3-10)was studied.Reactions were faster on higher initial SA concentrations and decomposition of SA was greatest at pH 8.Varying deposition temperature and film thickness during ALD process influenced the efficiency of TiO2.Crystallinity of the film changed with rising deposition temperature(150-450 °C)from amorphous to anatase and further to anatase rutile mixture,where rutile was the dominating phase.SA decomposition rate was greatest with catalysts consisting of both phases whereas pure anatase showed somewhat lesser efficiency and amorphous film did not work at all.Increasing film thickness enhanced the degradation of SA until the film was thick enough.With over 46 nm thick films the results remained the same.Two substrates,glass and silicon,were compared but the material was not found to have any evident impact on the catalytic efficiency of the film.
机译：研究了薄膜光催化剂，二氧化钛（TiO2）和紫外（UV）辐射对水杨酸（SA）的降解作用。采用原子层沉积（ALD）技术在玻璃或二氧化硅基底上制备了光催化剂。研究了初始浓度（10和75 mg / l）和pH（3-10）下的反应较快，在pH 8时，SA的分解最大，SA的分解最大.ALD过程中沉积温度和膜厚的变化影响了膜的效率。 TiO2薄膜的结晶度随沉积温度（150-450°C）的升高而从无定形转变为锐钛矿，再进一步变成锐钛矿的金红石混合物，其中金红石是主要相，由两相组成的催化剂的SA分解速率最大，而纯锐钛矿结果表明效率稍低，无定形膜根本不起作用。增加膜厚度会增加SA的降解，直到膜足够厚为止。超过46 nm的膜结果比较了玻璃和硅这两种基材，但未发现该材料对薄膜的催化效率有明显影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号