期刊
RSC ADVANCES
卷 6, 期 68, 页码 64028-64038出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra09386h
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB932902]
- National Natural Science Foundation of China (NSFC) [61071047, 31371003]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130092110030]
- Postdoctoral Science Foundation of Jiangsu Province [1501017C]
- Fundamental Research Funds for the Central Universities [2242016R20026]
- Analysis Foundation of Southeast University [1160739030]
Currently, it is of great significance and a challenge to develop facile synthetic routes to obtain a novel plasmonic heterogeneous catalyst with high activity and long lifetime for the reduction of a refractory organic compound like 4-nitrophenol (4-NP). To this end, a three-dimensional (3D) porous framework named reduced graphene oxide/gold nanoparticle aerogel (rGO/Au NPA) was constructed by individual GO sheets and HAuCl4 under the reduction of trisodium citrate dihydrate (Na(3)Cit) via a one-step hydrothermal method. The abundant Au NPs having a diameter of 7-160 nm can be easily in situ incorporated into graphene sheets to form a 3D hierarchical monolith by the reduction of Na(3)Cit, which was well-disclosed by field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Such 3D rGO/Au NPA with interconnected porous structure displays a good thermal stability and large Brunauer-Emmett-Teller specific surface area of 37.8325 m(2) g(-1). More importantly, the fabricated rGO/Au NPA can act as a heterogeneous catalyst, exhibiting an outstanding catalytic activity and good reusability towards the reduction of 4-NP due to the synergetic effect between Au NPs and graphene sheets. Additionally, the mechanism of enhanced catalytic efficiency for the 3D rGO/Au NPA catalyst has also been proposed.
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