Fabrication of small L-threonine capped nickel nanoparticles and their catalytic application
Fabrication of small L-threonine capped nickel nanoparticles and their catalytic application
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DOI：
10.1016/j.apcata.2012.12.005
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发表时间：
2013-02-26
影响因子：
5.5
通讯作者：
Soomro, Razium Ali
中科院分区：
文献类型：
--
作者：
Kalwar, Nazar Hussain;Sirajuddin;Soomro, Razium Ali
描述了一种通过改进的硼氢化物还原法在水介质中制备分散良好的L-苏氨酸衍生的镍纳米颗粒（Ni NPs）的简便且绿色的种子介导的生长方法。L-苏氨酸分子用于以良好分散的Ni NP的形式组织纳米级复合材料。发现碱性pH 8.5有利于形成球形和良好分散的Ni NP，如透射电子显微镜（TEM）显微照片所示。新鲜制备的Ni NPs具有1.68-5.06 nm的纳米尺度，如从原子力显微镜（AFM）和TEM数据所确定的。因此，制备的镍纳米粒子用于其在刚果红（CR）染料选择作为模型试剂的还原的催化潜力。结果显示在不存在Ni NP的情况下染料的减少可忽略不计。相反，仅添加0.2mg Ni NP产生100%的还原/降解效率。回收使用过的Ni NP并再利用数次以降低CR而没有任何活性损失。目前的研究结果是同样可扩展的保护水环境免受其他染料通过一个简单的，高度经济的，快速和有效的还原/降解方法的基础上的催化潜力的镍纳米粒子的污染。(C)2012爱思唯尔有限公司版权所有。
A facile and green seed mediated growth approach for fabrication of well dispersed L-threonine derived nickel nanoparticles (Ni NPs) in an aqueous medium via a modified borohydride reduction method is described. L-Threonine molecules served to organize the nanoscale composites in the form of well dispersed Ni NPs. The basic pH 8.5 was found to favor the formation of spherical and well dispersed Ni NPs as shown in transmission electron microscopy (TEM) micrographs. Freshly prepared Ni NPs possess the nanoscale dimension of 1.68-5.06 nm, as determined from atomic force microscopy (AFM) and TEM data. The Ni NPs thus prepared were used for their catalytic potential in the reduction of congo red (CR) dye selected as a model reagent. The results revealed negligible reduction of dye in the absence of Ni NPs. Conversely the addition of only 0.2 mg Ni NPs produced 100% reduction/degradation efficiency. The used Ni NPs were recovered and reutilized several times for reducing CR without any loss of activity. The current findings are equally extendable for safeguarding the aquatic environment against the pollution caused by other dyes via a facile, highly economical, rapid and efficient reduction/degradation method based on the catalytic potential of Ni NPs. (C) 2012 Elsevier B.V. All rights reserved.