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Solvothermal Synthesis of CZTS Nanoparticles in Ethanol: Preparation and Characterization
Xinlong Yan,Xiaoyan Hu,Sridhar Komarneni 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.10
In this work, a low-cost, non-toxic and convenient one-pot solvothermal route to synthesize Cu2ZnSnS4 (CZTS) nanoparticles is reported. The effects of solvothermal temperature and reaction time on the structure, morphology and optical properties of the as-synthesized product were investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX) measurements and X-ray photoelectron spectroscopy (XPS). The results showed that the crystallinity of the CZTS powders was influenced by the solvothermal temperature and reaction time. The band gap of selected CZTS samples was near the optimum value for photovoltaic solar conversion in a single-band-gap device.
Xiaoyan Hu,Xinlong Yan,Rui Feng,Jianliang Xue 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.10
The activation role of V2O5/Al2O3 during the cracking of heptane over ZSM-5 catalysts has already been confirmed in our previous study. In order to get more details about the alternative reaction pathway contributed by the activation of V2O5/Al2O3, a comparative study of n-heptane cracking over ZSM-5 equilibrium catalyst without and with V2O5/Al2O3 introduction was performed at different temperatures and contact time. The results indicated that elevated reaction temperature weakened the role of V2O5/Al2O3 during the reaction process. While the impacts of contact time were not as strong as that of temperature, and the change of relative contribution of different reaction pathways, including thermal reaction, carbonium/carbenium ion cracking, and reaction of the intermediate species because of V2O5/Al2O3 activation, was concluded to be small at varied N2 flow rates.