聚对苯二甲酸乙二醇酯
材料科学
水溶液
六价铬
图层(电子)
化学工程
聚萘二甲酸乙二醇酯
铬
吸附
原子层沉积
离子
沉积(地质)
水溶液中的金属离子
金属
复合材料
吸附
冶金
化学
有机化学
工程类
生物
古生物学
沉积物
作者
Wade F. Ingram,Jonathan C. Halbur,Ankesh Madan,Jesse S. Jur
出处
期刊:Journal of vacuum science & technology
[American Vacuum Society]
日期:2018-04-24
卷期号:36 (3)
被引量:2
摘要
This work explores the photoremediation of hexavalent chromium from aqueous solutions on to nonwoven polyethylene terephthalate substrates modified by nanoscale atomic layer deposition coatings of ZnO. Removal of Cr6+ is observed to increase with ZnO thin film thickness up to 500 atomic layer deposition cycles (∼90 nm) with a maximum Cr6+ removal of 67% after an exposure of 540 J/cm2. Instead of reducing Cr6+ to Cr3+, this work shows that the mechanism for removal of the Cr ion from solution is by sorption and photoreduction of the metal onto the ZnO surface. Additionally, mixed solutions with Cr6+ and As3+ ions were tested for simultaneous photoreduction and photooxidation, showing that mixed ion solutions may better utilize photogenerated electrons and holes, simultaneously. The reported demonstration and analysis represents a facile route for reclamation of toxic components in an aqueous media.
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