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  Chemical Engineering Journal 181  182 (2012) 45  55 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: Nanocomposite TiO2  SiO2 gel for UV absorption Angkhana Jaroenworaluck a,*, Nuchanaporn Pijarn a, Nudthakarn Kosachan a, Ron Stevensb a National Metal and Materials Technology Center, 114 Thailand Science Park, Paholyothin Rd., Klong 1, Klong Luang, Pathumthani 12120, Thailand  b Mechanical Engineering Department, University of Bath, BA2 7AY Bath, UK article info abstract Article history: Received 5 April 2011 Received in revised form 8 August 2011 Accepted 9 August 2011 Keywords: TiO2  SiO2 gel TiO2  fumed SiO2 Mesoporous SiO2 gel UV absorption Energy band gap Rice husk Nano-sized particle  TiO2-doped SiO2 gels have been synthesized for use as composites in which the UV absorption efficiency, the major factor for UV protection, can be enhanced. SiO2 gels having a mesoporous morphology have been synthesized via a sol  gel processing route using rice husk as the starting material and further treated using additions of TiO2 from two sources. The chemical purity of  the SiO2 was measured by X-ray fluorescence analysis (XRF). Typical samples of pure TiO2, SiO2 and their composites were tested for surface characteristics using N2-sorption (BET surface area). All the different compositions processed have been characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), and imaged using Scanning and Transmission Electron Microscopy (SEM, TEM). The UV absorption values which


Jul 23, 2017
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