水蒸气中铁的热氧化合成氧化铁纳米片和纳米线去除Cr(VI)的效果评价

Procedia Chemistry Pub Date : 2016-01-01 DOI:10.1016/j.proche.2016.03.057

Faisal Budiman , Tan Wai Kian , Khairunisak Abdul Razak , Atsunori Matsuda , Zainovia Lockman

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引用次数: 16

摘要

在这项工作中，通过在500°C和800°C的水蒸气存在下对铁箔进行热氧化制备氧化铁纳米片(NSs)和纳米线(NWs)。氧化形成表面以α-Fe2O3为主，内部以Fe3O4为主的多尺度氧化物。基于应力驱动机制和铁离子的扩散路径，讨论了其形成机理。结果表明，形成的NSs可吸附112 mg/L的Cr(VI)， NWs可吸附200 mg/L的Cr(VI)。认为氧化铁NSs/NWs对Cr(VI)的去除是由于吸附剂与吸附物之间的静电反应所致。

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The Assessment of Cr(VI) Removal by Iron Oxide Nanosheets and Nanowires Synthesized by Thermal Oxidation of Iron in Water Vapour

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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Procedia Chemistry

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