瓜尔胶
催化作用
铂纳米粒子
4-硝基苯酚
铂金
生物高聚物
还原剂
纳米颗粒
化学
粒径
X射线光电子能谱
化学工程
选择性催化还原
核化学
材料科学
纳米技术
有机化学
聚合物
食品科学
物理化学
工程类
作者
Sadanand Pandey,Shivani B. Mishra
标识
DOI:10.1016/j.carbpol.2014.07.047
摘要
We report a facile and green method to synthesise highly stable dispersions of platinum nanoparticles (PtNPs) with an average particle size of ∼ 6 nm. Natural, nontoxic, eco-friendly biopolymer guar gum was utilised as both the reducing and capping agent precursor in aqueous medium. The PtNPs that had been stabilised by guar gum (GG-s-PtNPs) were characterised by UV-vis spectroscopy, XRD, TEM and XPS. GG-s-PtNPs performed better in terms of catalytic activity for the liquid phase reduction of p-nitrophenol (p-NP) compared to p-aminophenol (p-AP). The efficiency of the catalytic reduction of p-NP over GG-s-PtNPs was found to be 97% in a total time of 320 s at room temperature. The mechanisms of the synthesis and catalytic reduction of p-NP are also discussed. The synthesis approach presented here does not require stringent conditions or toxic agents and thus is a straightforward, rapid, efficient, and green approach to the fabrication of highly active catalysts.
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