Saha, Arka and Bharmoria, Pankaj and Mondal, Aniruddha and Ghosh, Subhash C and Mahanty, Sourindra and Panda, Asit Baran (2015) Generalized synthesis and evaluation of formation mechanism of metal oxide/sulphide@C hollow spheres. Journal of Materials Chemistry A, 3 (40). pp. 20297-20304. ISSN 2050-7488

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Herein, we report a generalized novel soft-template approach for the synthesis of a variety of uniform metal oxide (MoO2, Fe3O4, V2O3) and sulphide (MoS2, ZnS)@C hollow spheres using sucrose and cetyl trimethylammonium bromide (CTAB) as a soft template. The synthesized hollow spheres are uniform in size, with a size range of 800 nm to 1.3 mu m. The developed methodology allows for altering the carbon content by just varying the amount of sucrose in the precursor solution. The formation mechanism of the soft template was also studied by using isothermal titration calorimetry (ITC), infrared (IR) spectroscopic analysis and scanning electron microscopy (SEM) of the intermediate. The strategy was developed based on the in situ formation of the spherical soft template by the interaction of sucrose and CTAB under the experimental conditions, formation of an inorganic shell by the interaction of a metal salt and template surface, carbonization of sucrose under hydrothermal conditions, and finally formation of the desired metal oxide/sulphide@C through calcination under 5% H-2 in a flow of N-2. Using the synthesized MoS2@C hollow sphere as a typical representative of such hollow spheres, its performance was examined as an anode for a lithium-ion battery to determine the applicability of the developed procedure; it exhibited a high specific capacity (similar to 1100 mA h g(-1) at 150 mA g(-1)) as a lithium-ion battery (LiB) anode.

Item Type: Article
Subjects: Engineering Materials
Divisions: Fuel Cell and Battery
Depositing User: Bidhan Chaudhuri
Date Deposited: 04 Jan 2016 11:52
Last Modified: 04 Jan 2016 11:52

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