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B. Sun, E. P. Reddy and P. G. Smirniotis, “Visible Light Cr(VI) Reduction and Organic Chemical Oxidation by TiO2 Photocatalysis,” Environmental Science and Technology, Vol. 39, No. 16, 2005, pp. 6251-6259. http://dx.doi.org/10.1021/es0480872

has been cited by the following article:

• TITLE: Effective Photocatalytic Reduction of Cr(VI) by Carbon Modified (CM)-n-TiO2 Nanoparticles under Solar Irradiation

  AUTHORS: Yasser A. Shaban

  KEYWORDS: Photocatalytic Reduction; Chromium; Titanium Oxide; Carbon Modification

  JOURNAL NAME: World Journal of Nano Science and Engineering, Vol.3 No.4, December 6, 2013

  ABSTRACT: Photocatalytic reduction of toxic Cr(VI) was successfully achieved using carbon modified titanium oxide (CM-n-TiO2) nanoparticles under natural sunlight illumination. Modification of titanium oxide by carbon significantly enhanced the photocatalytic reduction of Cr(VI) under natural sunlight irradiation. The effects of various experimental parameters such as catalyst dose, initial concentration of Cr(VI), and solution pH on the reduction rate of Cr(VI) were investigated. The highest reduction rate of Cr(VI) was obtained at the optimal conditions of pH 5 and 2.0 g·L?1 of CM-n-TiO2. Interestingly, in the presence of phenol, as a sacrificial electron donor, the rate of Cr(VI) reduction was nearly 1.7 times higher than in its absence. The solar photoreduction of Cr(VI) in aqueous solution using CM-n-TiO2 obeyed a pseudo-first order kinetics according to the Langmuir-Hinshelwood model.