(2012) Hydrothermal synthesis of surface-modified, manganese-doped TiO<inf>2</inf> nanoparticles for photodegradation of methylene blue. Environmental Engineering Science.
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Abstract
There has been a growing trend toward the addition of surface modifiers, surfactants, or capping agents to the precursors of titanium dioxide nanoparticles to tailor their morphology, structure, and size. In this study, surface-modified, manganese-doped titanium dioxide nanoparticles were successfully synthesized under mild hydrothermal conditions (pressure is autogenous; temperature, 250°C; time, 18 h). Using different molar ratios, we applied caprylic acid to change the surface chemistry and photocatalytic efficiency of manganese-doped titanium dioxide nanoparticles. Reagent grade titanium dioxide and manganese dioxide were the precursors, and concentrated hydrogen chloride was used as a solvent. Synthesized nanoparticles were characterized using powder x-ray diffraction, transmission electron microscopy, BET surface area, and ultraviolet-visible spectroscopy. Photodegradation studies of methylene blue were then carried out using ultraviolet and sunlight irradiation to compare the photocatalytic efficiency of the products. Results of chemical oxygen demand and transmission percentage revealed a higher photocatalytic efficiency of the surface-modified, manganese-doped titanium dioxide nanoparticles compared to reagent grade titanium dioxide. © Copyright 2012, Mary Ann Liebert, Inc. 2012.
Item Type: | Article |
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Keywords: | BET surface area; Capping agent; Caprylic acid; Hydrogen chloride; hydrothermal; Manganese dioxide; Methylene Blue; Mild hydrothermal condition; Molar ratio; Photocatalytic efficiency; Photodegradation of methylene blue; Powder X ray diffraction; Reagent grades; Sunlight irradiation; Surface modifiers; Surface-modified; TiO; Titanium dioxide nanoparticles, Aromatic compounds; Chemical oxygen demand; Chlorine compounds; Efficiency; Hydrothermal synthesis; Manganese; Manganese compounds; Oxides; Saturated fatty acids; Surface chemistry; Surface treatment; Titanium dioxide; Transmission electron microscopy; Ultraviolet visible spectroscopy; X ray diffraction, Nanoparticles, hydrochloric acid; manganese; manganese dioxide; methylene blue; nanoparticle; octanoic acid; titanium dioxide, article; chemical oxygen demand; hydrothermal synthesis; photocatalysis; photodegradation; powder diffraction; surface property; synthesis; temperature; transmission electron microscopy; ultraviolet irradiation; ultraviolet spectroscopy; X ray diffraction |
Page Range: | pp. 1032-1037 |
Journal or Publication Title: | Environmental Engineering Science |
Volume: | 29 |
Number: | 11 |
Identification Number: | 10.1089/ees.2011.0519 |
ISSN: | 10928758 |
Depositing User: | مهندس جمال محمودپور |
URI: | http://eprints.muk.ac.ir/id/eprint/1392 |
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