Theophylline-assisted, eco-friendly synthesis of PtAu nanospheres at reduced graphene oxide with enhanced catalytic activity towards Cr(VI) reduction

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• 作者：Ling-Ya Hu¹ ; Li-Xian Chen¹ ; Meng-Ting Liu ; Ai-Jun Wang ; ^{ajwang@zjnu.cn} ; Lan-Ju Wu ; Jiu-Ju Feng ; ^{jjfeng@zjnu.cn}
• 关键词：Theophylline ; Eco-friendly synthesis ; PtAu nanospheres ; Reduced graphene oxide ; Chromium (VI) reduction
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 May 2017
• 年：2017
• 卷：493
• 期：Complete
• 页码：94-102
• 全文大小：2355 K
• 卷排序：493

文摘

Theophylline as a naturally alkaloid is commonly employed to treat asthma and chronic obstructive pulmonary disorder. Herein, a facile theophylline-assisted green approach was firstly developed for synthesis of PtAu nanospheres/reduced graphene oxide (PtAu NSs/rGO), without any surfactant, polymer, or seed involved. The obtained nanocomposites were applied for the catalytic reduction and removal of highly toxic chromium (VI) using formic acid as a model reductant at 50 °C, showing the significantly enhanced catalytic activity and improved recyclability when compared with commercial Pt/C (50%) and home-made Au nanocrystals supported rGO (Au NCs/rGO). It demonstrates great potential applications of the catalyst in wastewater treatment and environmental protection. The eco-friendly route provides a new platform to fabricate other catalysts with enhanced catalytic activity.