Sub-20 nm anatase particles uniformly anchored on graphene oxide and reduced graphene oxide nanosheets and their photocatalytic oxidation and Li-ion storage capabilities |
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| Affiliation: | 1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;2. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China;3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;4. Advanced Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;1. Dipartimento di Scienza Applicata del Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy;2. University Politehnica of Bucharest, Faculty of Applied Sciences, Splaiul Independentei 313, 060042, Bucharest, Romania;3. Istituto Italiano di Tecnologia, Centre for Sustainable Futures, CSF@PoliTo Corso Trento, 21, 10129, Torino, Italy;4. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoye Shosse 31, 115409, Moscow, Russian Federation;1. Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India;2. Centre for Nanomaterials and MEMS & Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, Karnataka 560064, India |
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| Abstract: | Nanosized anatase TiO2 particles anchored on nanocarbon substrates have great potential for practical applications in high-performance lithium ion batteries and efficient photocatalysts. The synthesis of this material usually utilizes calcination to crystallize amorphous titania, which normally causes the formation of aggregates and some side effects. In this work, we demonstrated that sub-20 nm anatase particles uniformly anchored on graphene oxide and reduced graphene oxide nanosheets in aqueous solution at a temperature of 90 °C and atmospheric pressure, without further calcination. The photocatalytic oxidation activity and electrochemical properties of graphene oxide/anatase TiO2 (GO/A) and reduced graphene oxide/anatase TiO2 (RGO/A) were comparatively investigated. We found that GO/A showed higher photocatalytic oxidation activity than RGO/A under UV light irradiation. Graphene oxide accepted electrons and suffered reduction, which finally decreased GO/A’s photocatalytic oxidation activity to an extent similar to RGO/A. We also found that, as anode material for Li-ion battery, the specific capacity of RGO/A was nearly three times that of GO/A at the same current rate. This study will inspire better design of metal oxide/nanocarbon nanocomposites for high performance lithium ion battery and photocatalysis applications. |
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| Keywords: | B Nanocomposites E Batteries Nanocarbon materials |
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