Electrospun nanoscale iron oxide-decorated carbon fiber as an efficient heterogeneous catalyst for activating percarbonate to degrade Azorubin S in water

Chia Yu Hsiao, Ching Hung, Eilhann Kwon, Chao Wei Huang, Chih Feng Huang, Kun Yi Andrew Lin

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Sodium percarbonate (2Na2CO3∙3H2O2) (PC) represents a promising alternative to H2O2 as PC is solid-phase, making it easier to handle; however iron (Fe) species are usually necessitated to activate PC for effectively producing hydroxyl radicals (HR) in degradation of toxicants. As homogeneous Fe species leads to severe issues of precipitation, heterogeneous iron oxide nanoparticles (NPs) seem promising but these NPs tend to aggregate in water. Thus, it is critical to develop supported iron oxide NPs. Since carbonaceous materials are one of the most useful supports, carbonaceous materials can be even fabricated into special morphologies to support iron oxide NPs. Herein, we propose to employ the electrospinning technique to develop carbon fiber (CF) as an advantageous carbon support because CF has a large aspect ratio (50:1) to allow iron oxide NPs well decorated on CF, forming a promising iron oxide NP-decorated CF (FeCF) for PC activation. FeCF is characterized using SEM, TEM, XRD, XPS, Raman spectroscopy and N2 sorption isotherm. This FeCF can exhibit a noticeably higher catalytic reactivity than pristine Fe2O3 NPs for activating PC to generate HR, and then degrade a toxicant, Azorubin S (AZS). FeCF also exhibits a much lower activation energy (Ea) value of AZS degradation than other reported catalysts. Besides, FeCF could be also reusable to activate PC for degradation of AZS. Additionally, the degradation mechanism of AZS by FeCF-activated PC is also elucidated to provide insights into activation of PC and its environmental applications. These features prove that FeCF is an efficient heterogeneous catalyst to activate PC for degrading toxicants in aqueous solutions.

原文English
文章編號101838
期刊Journal of Water Process Engineering
40
DOIs
出版狀態Published - 2021 四月

All Science Journal Classification (ASJC) codes

  • 生物技術
  • 安全、風險、可靠性和品質
  • 廢物管理和處置
  • 製程化學與技術

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