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Dive into the research topics where Baojun Li is active.

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Featured researches published by Baojun Li.


Journal of Materials Chemistry | 2011

ZnO@graphene composite with enhanced performance for the removal of dye from water

Baojun Li; Huaqiang Cao

A ZnO@graphene composite exhibits enhanced performance for photocatalytic degradation and filtered removal of RhB dye, in comparison with ZnO and graphene, highlighting its potential applications for a variety of environmental issues.


Inorganic Chemistry | 2011

Co3O4@graphene Composites as Anode Materials for High-Performance Lithium Ion Batteries

Baojun Li; Huaqiang Cao; Jin Shao; Guoqiang Li; Meizhen Qu; Gui Yin

This paper reports on the synthesis of Co(3)O(4)@graphene composites (CGC) and their applications as anode materials in lithium ion batteries (LIBs). Through a chemical deposition method, Co(3)O(4) nanoparticles (NPs) with sizes in the range of 10-30 nm were homogeneously dispersed onto graphene sheets. Due to their high electrical conductivity, the graphene sheets in the CGC improved the electrical conductivity and the structure stability of CGC. CGC displayed a superior performance in LIBs with a large reversible capacity value of 941 mA hg(-1) in the initial cycle with a large current density and an excellent cyclic performance of 740 mA hg(-1) after 60 cycles, corresponding to 88.3% of the theoretical value of CGC, owing to the interactions between graphene sheets and Co(3)O(4) NPs anchored on the graphene sheets. This synthesis approach may find its application in the design and synthesis of novel electrode materials used in LIBs.


Journal of Materials Chemistry | 2011

Superparamagnetic Fe3O4 nanocrystals@graphene composites for energy storage devices

Baojun Li; Huaqiang Cao; Jin Shao; Meizhen Qu; Jamie H. Warner

In this paper, a Fe3O4 nanocrystals@graphene composite (FGC) was synthesized via a chemical deposition method by using graphene oxide as a precursor. We also investigate the structures, physicochemical properties and applications of FGCs, involving superparamagnetic performance, and use as supercapacitors and lithium ion battery (LIBs). The results showed that the Fe3O4 NCs were formed and incorporated onto the surface of the graphene sheets. The composite material FGC with a micrometre scale structure possessed similar size as the graphene sheets and exhibited superparamagnetic behavior at room temperature. The supercapacitance values of the FGC composites were enlarged compared with those of the graphene sheets or Fe3O4 NCs, which is attributed to the interaction between the Fe3O4 NCs and the graphene sheets. Meanwhile, a superior rechargeable stability of FGCs used as an anode material in LIBs can be observed.


Chemical Communications | 2011

Enhanced anode performances of the Fe3O4–Carbon–rGO three dimensional composite in lithium ion batteries

Baojun Li; Huaqiang Cao; Jin Shao; Meizhen Qu

A three dimensional composite was constructed by anchoring Fe(3)O(4) nanoparticles encapsulated within carbon shells onto reduced graphene oxide sheets, which exhibited enhanced anode performances in lithium ion batteries with a specific capacity of 842.7 mAh g(-1) and superior recycle stability after 100 cycles.


Journal of Materials Chemistry | 2011

Cu2O@reduced graphene oxide composite for removal of contaminants from water and supercapacitors

Baojun Li; Huaqiang Cao; Gui Yin; Yuexiang Lu; Jiefu Yin

Cu2O@reduced graphene oxide composite displays a good ability to remove dyes from water and high stability in supercapacitors, highlighting potential applications in environmental and energy storage issues.


Journal of Materials Chemistry | 2012

Synthesis and superior anode performance of TiO2@reduced graphene oxide nanocomposites for lithium ion batteries

Huaqiang Cao; Baojun Li; Jingxian Zhang; Fang Lian; Xianghua Kong; Meizhen Qu

Herein, we report the synthesis of TiO2-reduced graphene oxide composite (termed as TGC) nanostructures using tetrabutyl titanate as the titanium source via a solvothermal route. The TGC nanostructures were characterized by transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and adsorption–desorption isotherms for nitrogen measurements. The TGC was used as the anode of lithium ion batteries for investigation. The hybrid nanocomposite exhibited remarkable improvement in lithium ion insertion/extraction behaviour compared with TiO2, which showed an initial irreversible capacity and a reversible capacity of 386.4 and 152.6 mAh g−1 for TGC after 100 cycles at a high charge rate of 5 C (1000 mA g−1), compared to 69.5 and 9.7 mAh g−1 for TiO2, respectively. The enhanced electrochemical performance of TGC is attributed to the increased conductivity in the presence of reduced graphene oxide in TGC, the small size of the TiO2 particles in TGC, which can shorten the transport paths for both Li+ ions and electrons, and the enlarged electrode–electrolyte contact area, leading to more electroactive sites in TGC.


Journal of Materials Chemistry | 2011

Mg(OH)2@reduced graphene oxide composite for removal of dyes from water

Baojun Li; Huaqiang Cao; Gui Yin

The Mg(OH)2@reduced graphene oxide (rGO) composite (MGC) was synthesized via a chemical deposition method. Its mesoporous structures and application as an adsorbent for the removal of methylene blue (MB) from water were investigated. The Mg(OH)2 nanosheets were formed and dispersed homogeneously onto the surface of rGO sheets, which provided high surface area, pore volume, and uniform pore width distribution. MGC exhibited excellent adsorption behavior for MB.


Chemical Communications | 2011

Improved performances of β-Ni(OH)2@reduced-graphene-oxide in Ni-MH and Li-ion batteries

Baojun Li; Huaqiang Cao; Jin Shao; He Zheng; Yuexiang Lu; Jiefu Yin; Meizhen Qu

Incorporation of reduced graphene oxide into β-Ni(OH)(2) presents high performances with specific discharge capacity of 283 mA hg(-1) after 50 cycles in Ni-MH batteries, and 507 mA hg(-1) after 30 cycles in Li ion batteries.


Journal of Materials Chemistry | 2012

Synthesis and separation of dyes via Ni@reduced graphene oxide nanostructures

Baojun Li; Huaqiang Cao; Jiefu Yin; Yimin A. Wu; Jamie H. Warner

In this article, we report a scalable one-step synthesis of Ni@reduced graphene oxide (rGO) termed as (NGC) nanocomposites generated via synchronous reduction reaction of GO and Ni2+ ions in hydrazine hydrate solution under hydrothermal conditions, which was characterized by transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform infrared, X-ray diffraction, X-ray photoelectron spectroscopy and M–H measurement. NGC nanocomposites exhibits ferromagnetic behavior with enhanced coercivity in comparison with bulk nickel, as well as superior rechargeable stability as electrode materials in supercapacitors.


Journal of Materials Chemistry | 2012

SnO2–carbon–RGO heterogeneous electrode materials with enhanced anode performances in lithium ion batteries

Baojun Li; Huaqiang Cao; Jingxian Zhang; Meizhen Qu; Fang Lian; Xianghua Kong

Anchoring SnO2 NPs encapsulated in carbon shells onto RGO exhibits superior anode performances in lithium ion batteries with specific capacities of 622 mA h g−1 after 100 cycles.

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Meizhen Qu

Chinese Academy of Sciences

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Jin Shao

Chinese Academy of Sciences

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Fang Lian

University of Science and Technology Beijing

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Xianghua Kong

University of Science and Technology Beijing

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