Methylene blue, photocatalytic

Xiao Q, Si Z, Zhang J, Xiao C, Yu Z, Qiu G (2007) Effects of samarium dopant on photocatalytic activity of Ti02 nanocrystallite for methylene blue degradation. J Mater Sci 42 9194-9199... 

Moafi et al. [143] studied the ability of titania versus zirconia to photocatalyze methylene blue and eosin yellow on polyacrylonitrile fibers. Ti02 particles ranging from 10-20 nm in size and Zr02 particles ranging from 20-40 nm in size were dispersed on the fiber surface. Photocatalytic activity of Ti02 was greater. 

The photocatalytic activity of ZnO nanomaterials for the degradation of some organic pollutants in water [173] (e.g., dyes [174]) was explored by several groups to achieve environmental benefits. Recent studies have indicated that ZnO can be used under acidic or alkaline conditions with the proper treatment [175,176]. ZnO nanomaterials were used as photocatalysts for the degradation of phenol [177] and chlorinated phenols such as 2,4,6-trichlorophenol [178]. ZnO nanomaterials were also used for the degradation of Methylene Blue [179], direct dyes [180], Acid Red [181], and Ethyl Violet [182],... 

Jang, Y.J., Simer, C. and Ohm, T. (2006) Comparison of zinc oxide nanoparticles and its nano-crystalline particles on the photocatalytic degradation of methylene blue. Materials Research Bulletin, 41,67-77. 

H. Gnaser, M. R. Savina, W. F. Calaway, C. E. Tripa, I. V. Veryovkin, and M. J. Pellin. Photocatalytic Degradation of Methylene Blue on Nanocrystalline Ti02 Surface Mass Spectrometry of Reaction Intermediates. Int. J. Mass Spectrom., 245(2005) 61-67. 

Lunak S, Sedlak P, Lederer P. Methylene-blue-sensitized photochemical hy-droxylation of 2-hydroxybenzoic acid by hydrogen peroxide photocatalytic effect of ferric chloride. J Photochem 1987 39 239-250. 

Au/Ti02 nanocomposites have shown high activity for photocatalytic degradation of various organic compounds. Li et al. (Li and Li 2001) studied photooxidation of methylene blue by Au-loaded I i02 in aqueous solutions. The high Schottky barrier... 

Mohamed, M.M. and M.M. Al-Esaimi (2006). Characterization, adsorption and photocatalytic activity of vanadium-doped Ti02 and sulfated Ti02 (rutile) catalysts Degradation of methylene blue dye. Journal of Molecular Catalysis A-Chemical, 255(1-2), 53-61. 

Scheme 3 Proposed mechanism for the photocatalytic destruction of methylene blue (reproduced from [136] with permission from Elsevier Science B.V.)...

Valladares JE, Bolton JR (1993) A Method for the Determination of Quantum Yields in Heterogeneous Systems the Ti02 Photocatalyzed Bleaching of Methylene Blue, in Ollis DF, Al-Ekabi H (eds) Photocatalytic Purification and Treatment of Water and Air, Elsevier, Amsterdam 111-120. 

Yan, X. Ohno, T. Nishijima, K. Abe, R. Ohtani, B. Chem. Phys. Lett. 2006, 429, 606 This paper claimed inappropriate use of organic dyes as test compounds for visible light-sensitive photocatalysts. Citation of this paper was not expected at all, since the authors using methylene blue (MB) as a model compound for photocatalytic reaction never want to refer to this and, on the other hand, those who do not use MB need not to refer to this. However, there has been an appreciable number of citations and, to the author s surprise, approximately half of the citations of this paper were for reasonable use of MB, indicating that authors of those papers did not read the paper. 

---