Synthesis of iron-based nanoparticles by green tea extract and their degradation of malachite
Synthesis of iron-based nanoparticles by green tea extract and their degradation of malachite
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DOI：
10.1016/j.indcrop.2013.09.024
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发表时间：
2013-11
影响因子：
5.9
通讯作者：
Xiulan Weng;Lanlan Huang;Zuliang Chen;M. Megharaj;R. Naidu
中科院分区：
文献类型：
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作者：
Xiulan Weng;Lanlan Huang;Zuliang Chen;M. Megharaj;R. Naidu
本文利用绿茶提取物合成纳米铁（GT-Fe NPs）并在水溶液中降解孔雀石绿（MG）。结果表明，通过SEM和EDS观察到GT-Fe NPs与MG反应后形貌受到破坏，尺寸增大。 XRD表明GT-Fe NPs的特征峰在反应前后变化不大。紫外可见光谱显示 MG 的吸收峰下降，而 FTIR 显示反应后 1585 cm−1 处的谱带对应于苯基。还考察了影响MG去除效率的因素，包括初始溶液pH值、MG初始浓度、GT-Fe NPs的用量和反应温度。结果表明，在 298 K 时，96% 的 MG 被去除为 50 mg/L。动力学研究表明，MG 的去除非常符合伪一级模式。
In this paper, green tea extract was used to synthesize iron nanoparticles (GT-Fe NPs) and degrade malachite green (MG) in aqueous solution. The results show that the damage to morphology and increase in size of GT-Fe NPs after reaction with MG were observed by SEM and EDS. XRD shows that there are few changes in the characteristic peaks of GT-Fe NPs before and after reaction. UV–vis spectroscopy shows that the absorption peak of MG decreased, while FTIR shows that the band at 1585 cm−1corresponded to the phenyl after reaction. The factors impacting on the removal efficiency of MG, including the initial solution pH, the initial concentration of MG, the dosage of GT-Fe NPs, and the reaction temperature, was also investigated. It emerged that 96% of MG was removed with a 50 mg/L at 298 K. Kinetics studies showed that the removal of MG fitted well to the pseudo first-order mode.