Faisal Budiman , Tan Wai Kian , Khairunisak Abdul Razak , Atsunori Matsuda , Zainovia Lockman
{"title":"The Assessment of Cr(VI) Removal by Iron Oxide Nanosheets and Nanowires Synthesized by Thermal Oxidation of Iron in Water Vapour","authors":"Faisal Budiman , Tan Wai Kian , Khairunisak Abdul Razak , Atsunori Matsuda , Zainovia Lockman","doi":"10.1016/j.proche.2016.03.057","DOIUrl":null,"url":null,"abstract":"<div><p>In this work, iron oxide nanosheets (NSs) and nanowires (NWs) were fabricated by thermal oxidation of iron foils at 500 and 800<!--> <!-->°C in the presence of water vapour. Oxidation resulted in multi-scale oxide with the surface oxide comprising of α-Fe<sub>2</sub>O<sub>3</sub> and inner oxide comprising of mostly Fe<sub>3</sub>O<sub>4</sub>. The mechanism of formation is discussed to be based on stress-driven mechanism and diffusion paths of iron ions. It was found that the NSs formed could adsorb 112<!--> <!-->mg/L aqueous Cr(VI) and the NWs could adsorb 200<!--> <!-->mg/L of Cr(VI). It is suggested that the Cr(VI) removal by the iron oxide NSs/NWs due to the electrostatic reaction between the adsorbent and adsorbate.</p></div>","PeriodicalId":20431,"journal":{"name":"Procedia Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.proche.2016.03.057","citationCount":"16","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Procedia Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1876619616001030","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 16
Abstract
In this work, iron oxide nanosheets (NSs) and nanowires (NWs) were fabricated by thermal oxidation of iron foils at 500 and 800 °C in the presence of water vapour. Oxidation resulted in multi-scale oxide with the surface oxide comprising of α-Fe2O3 and inner oxide comprising of mostly Fe3O4. The mechanism of formation is discussed to be based on stress-driven mechanism and diffusion paths of iron ions. It was found that the NSs formed could adsorb 112 mg/L aqueous Cr(VI) and the NWs could adsorb 200 mg/L of Cr(VI). It is suggested that the Cr(VI) removal by the iron oxide NSs/NWs due to the electrostatic reaction between the adsorbent and adsorbate.
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