title: Theophylline-assisted, eco-friendly synthesis of PtAu nanospheres at reduced graphene oxide with enhanced catalytic activity towards Cr(VI) reduction.
abstract: 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.
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Ling-Ya
authors.initials: LY
authors.lastname: Hu
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Li-Xian
authors.initials: LX
authors.lastname: Chen
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Meng-Ting
authors.initials: MT
authors.lastname: Liu
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China. Electronic address: ajwang@zjnu.cn.
authors.forename: Ai-Jun
authors.initials: AJ
authors.lastname: Wang
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Lan-Ju
authors.initials: LJ
authors.lastname: Wu
authors.affiliation: College of Geography and Environmental Science, College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China. Electronic address: jjfeng@zjnu.cn.
authors.forename: Jiu-Ju
authors.initials: JJ
authors.lastname: Feng
mesh_terms: D002384:Catalysis; D002857:Chromium / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D055772:Green Chemistry Technology; D054118:Nanospheres / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013696:Temperature; D013806:Theophylline / Q000737:chemistry*
chemical_list: D010087:Oxides; D002857:Chromium; C074702:chromium hexavalent ion; D006108:Graphite; D013806:Theophylline
keywords: Chromium (VI) reduction; Eco-friendly synthesis; PtAu nanospheres; Reduced graphene oxide; Theophylline