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RISS 인기검색어
- 검색키워드
- 저자 : Rifat Farzana (검색결과 2 건)
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Rifat Farzana,Ravindra Rajarao,Badekai Ramachandra Bhat,Veena Sahajwalla 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
Microporous activated carbon was synthesised using waste compact discs as precursor through physical activation method for supercapacitor electrode application. The activated carbon prepared at 900 °C for a time interval of 8 h showed highest surface area of 1214.25 m2 g−1. The electrochemical measurements showed that waste CDs derived activated carbon exhibited good specific capacitance, cycle stability and good rate capability compared to other waste derived activated carbon. The specific capacitance 51 F g−1 at the current density of 10 mV s−1 and energy density of 21.43 Wh kg−1 at power density 0.7 kW kg−1 was achieved in non-aqueous electrolyte.
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Synthesis of SiC/Si3N4 nanocomposite by using automotive waste tyres as resource
Ravindra Rajarao,Rifat Farzana,Rita Khanna,Veena Sahajwalla 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Large number of waste automotive tyres are being disposed through landfill or illegally dumped and onlysmall proportions are currently recycled. Waste tyres can be a source of health and environmentalconcerns and also represents a loss of potential valuable source. The ecofriendly and resource recoveryapproach is critically required to recycle waste automotive tyres. In this paper, an attempt to synthesisSiC/Si3N4 nanocomposite by in situ process using automotive waste tyres as resources has been reported. The synthesis was carried by using simultaneous carbothermal reduction and nitridation reaction at1550 8C in nitrogen atmosphere using pyrolysed waste automotive tyre char as carbon source and silicondioxide as silica source. The formation of SiC and Si3N4 particles was confirmed by FTIR and XRDtechniques. Raman analysis signifies the major phases of b-SiC, a-Si3N4 and b-Si3N4. The particle size ofsynthesised SiC/Si3N4 nanocomposite was in the range of 20–100 nm and mainly composed of sphereshaped nanoparticles. This innovative approach of using automotive tyres as carbon source forsynthesising SiC/Si3N4 nanocomposite will reduce the volume of wastes in landfills, decreases the risk ofhealth concerns and also recovers valuable carbon resource.
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