Fast and highly efficient catalytic degradation of dyes using κ-carrageenan stabilized silver nanoparticles nanocatalyst
Fast and highly efficient catalytic degradation of dyes using κ-carrageenan stabilized silver nanoparticles nanocatalyst
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DOI：
10.1016/j.carbpol.2019.115597
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发表时间：
2020-02-15
影响因子：
11.2
通讯作者：
Kang, Misook
中科院分区：
文献类型：
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作者：
Pandey, Sadanand;Do, Jeong Yeon;Kang, Misook
本文报道了利用高分子量κ-卡拉胶合成银纳米粒子（AgNPs）纳米催化剂。所开发的方法是快速，简便，生态友好和成本效益，这不需要随后的处理还原或稳定的银纳米粒子。采用FT-IR、zeta电位（xi）、XRD、TGA、XPS和TEM等技术对其进行了表征。TEM结果显示，AgNPs为球形，平均尺寸为12 nm，并且在整个聚合物基质中具有面心立方（FCC）结构，并且在没有任何保护剂或封端剂的情况下稳定超过两个月。合成的纳米催化剂对工业上重要的有机染料如罗丹明B和亚甲基蓝表现出高的催化降解和矿化，在很短的时间间隔内降解效率接近100%。染料降解的快速动力学是相当独特的相比，基于各种催化剂系统，其中缓慢的动力学报告的文献。
Herein, we have reported the synthesis of silver nanoparticles (AgNPs) nanocatalyst by using high-molecularweight kappa-carrageenan. The developed methodology was rapid, facile, ecofriendly and cost effective, which did not require subsequent processing for reduction or stabilization of AgNPs. The physico-chemical characterization was performed by FT IR, zeta potential (xi), XRD, TGA, XPS and TEM techniques. The TEM results revealed that the AgNPs were spherical in shape, with average size of 12 nm, and face centered cubic (FCC) structure throughout the polymer matrix and was stable without any protecting or capping reagents over two months. The synthesized nanocatalyst exhibited high catalytic degradation and mineralization of industrially important organic dyes such as Rhodamine B, and methylene blue, with a degradation efficiency of similar to 100 % in a very short interval. The fast kinetics of the dye degradation is quite unique compared to the reported literatures based on various catalyst systems where slow kinetics was reported.