Green synthesis of iron nanoparticles and their application as a Fenton-like catalyst for the degradation of aqueous cationic and anionic dyes
Green synthesis of iron nanoparticles and their application as a Fenton-like catalyst for the degradation of aqueous cationic and anionic dyes
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DOI：
10.1016/j.cej.2011.05.103
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发表时间：
2011-08-01
影响因子：
15.1
通讯作者：
Hallam, K. R.
中科院分区：
文献类型：
--
作者：
Shahwan, T.;Abu Sirriah, S.;Hallam, K. R.
利用绿色茶叶提取物制备铁纳米颗粒（GT-Fe NPs）。使用TEM表征材料。SEM/EDX，XPS，XRD和FTIR技术，并显示主要含有氧化铁和铁氧氢氧化物。然后将所得纳米颗粒用作Fenton类催化剂，用于含亚甲基蓝（MB）和甲基橙子（MO）染料的水溶液的脱色。相关实验研究了MB和MO的去除动力学和浓度的影响。使用紫外-可见（UV-vis）光谱监测水溶液中染料的浓度。结果表明，染料的快速去除，MB的动力学数据遵循二级去除速率，而MO的动力学数据更接近于一级去除速率。负载实验表明，几乎完全去除这两种染料从水中在很宽的浓度范围内，10-200毫克L-1。与硼氢化物还原法制备的铁纳米粒子相比，GT-Fe纳米粒子在动力学和去除率方面表现出更有效的类Fenton催化剂性能。(C)2011 Elsevier B. V.保留所有权利。
Iron nanoparticles were produced using extracts of green tea leaves (GT-Fe NPs). The materials were characterized using TEM. SEM/EDX, XPS, XRD, and FTIR techniques and were shown to contain mainly iron oxide and iron oxohydroxide. The obtained nanoparticles were then utilized as a Fenton-like catalyst for decolorization of aqueous solutions containing methylene blue (MB) and methyl orange (MO) dyes. The related experiments investigated the removal kinetics and the effect of concentration for both MB and MO. The concentrations of dyes in aqueous solution were monitored using ultraviolet-visible (UV-vis) spectroscopy. The results indicated fast removal of the dyes with the kinetic data of MB following a second order removal rate, while those of MO were closer to a first order removal rate. The loading experiments indicated almost complete removal of both dyes from water over a wide range of concentration, 10-200 mg L-1. Compared with iron nanoparticles produced by borohydride reduction, GT-Fe nanoparticles demonstrated more effective capability as a Fenton-like catalyst, both in terms of kinetics and percentage removal. (C) 2011 Elsevier B.V. All rights reserved.