Zinc oxide nano-enabled microfluidic reactor for water purification and its applicability to volatile organic compounds  

作　　者：Imadeddine Azzouz Yamina Ghozlane Habba Martine Capochichi-Gnambodoe Frédéric Marty Jérôme Vial Yamin Leprince-Wang Tarik Bourouina 

机构地区：[1]UniversitéParis-Est,ESIEE-Paris,ESYCOM EA 2552,2 Boulevard Blaise Pascal,93162 Noisy-le-Grand,France [2]UniversitéParis-Est,UPEM,ESYCOM EA 2552,5 Boulevard Descartes,77420 Champs sur Marne,France [3]LSABM,CNRS UMR 8231,ESPCI ParisTech-PSL Research University,10 Rue Vauquelin,75005 Paris,France

出　　处：《Microsystems & Nanoengineering》2018年第1期450-456,共7页微系统与纳米工程（英文）

基　　金：This work has received funding from the ANR EquipEx SENSECITY project;the FUI 18 MIMESYS funded by Region Ile-de-France and the European Union’s H2020 Programme for research,technological development and demonstration under grant agreement No 644852.

摘　　要：This paper reports fast and efficient chemical decontamination of water within a tree-branched centimeter-scale microfluidic reactor.The microreactor integrates Zinc oxide nanowires(ZnO NWs)in situ grown acting as an efficient photocatalytic nanomaterial layer.Direct growth of ZnO NWs within the microfluidic chamber brings this photocatalytic medium at the very close vicinity of the water flow path,hence minimizing the required interaction time to produce efficient purification performance.We demonstrate a degradation efficiency of 95%in o5 s of residence time in one-pass only.According to our estimates,it becomes attainable using microfluidic reactors to produce decontamination of merely 1 l of water per day,typical of the human daily drinking water needs.To conduct our experiments,we have chosen a laboratory-scale case study as a seed for addressing the health concern of water contamination by volatile organic compounds(VOCs),which remain difficult to remove using alternative decontamination techniques,especially those involving water evaporation.The contaminated water sample contains mixture of five pollutants:Benzene;Toluene;Ethylbenzene;m–p Xylenes;and o-Xylene(BTEX)diluted in water at 10 p.p.m.concentration of each.Degradation was analytically monitored in a selective manner until it falls below 1 p.p.m.for each of the five pollutants,corresponding to the maximum contaminant level(MCL)established by the US Environmental Protection Agency(EPA).We also report on a preliminary study,investigating the nature of the chemical by-products after the photocatalytic VOCs degradation process.

关 键 词：microfluidic reactor water purification zinc oxide nanowires volatile organic compounds(VOCs) Benzene Toluene Ethylbenzene m-p Xylenes o-Xylene(BTEX) 

分 类 号：O62[理学—有机化学]