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Temperature Stability and Photocatalytic Activity of Nanocrystalline Cristobalite Powders with Cu Dopant

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Abstract

The SiO2 nanoparticles doped by 10 % mol Cu were prepared via a sol-gel method under process control. The effects of doping and calcination temperature on the structural and photo-catalytic properties of SiO2 nanopowders have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-Vis absorption spectroscopy. Cristobalite and tridymite crystalline phases were found at a calcinations temperature range of 900∼1200 °C and amorphous phase was formed at a temperature of 800 °C for doped SiO2. The photocatalyst activity was evaluated by photocatalytic degradation kinetics of aqueous methyl orange (MO) under visible radiation. The results show that the photocatalytic activity of the 10 % mol Cu doped SiO2 nanopowders have a larger degradation efficiency than pure SiO2 under visible light at 900 °C temperature.

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Authors and Affiliations

  1. Department of Materials Engineering, Faculty of Engineering, Malayer University, P.O.Box: 65719-95863, Malayer, Iran

    Nasrollah Najibi Ilkhechi & Behzad Koozegar Kaleji

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  1. Nasrollah Najibi Ilkhechi
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  2. Behzad Koozegar Kaleji
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Correspondence to Nasrollah Najibi Ilkhechi.

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Ilkhechi, N.N., Kaleji, B.K. Temperature Stability and Photocatalytic Activity of Nanocrystalline Cristobalite Powders with Cu Dopant. Silicon 9, 943–948 (2017). https://doi.org/10.1007/s12633-015-9363-y

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  • DOI: https://doi.org/10.1007/s12633-015-9363-y

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