title: Fast photocatalytic degradation of methylene blue dye using a low-power diode laser.
abstract: This study focused on the application of diode lasers as alternative light sources for the fast photocatalytic degradation of methylene blue. The photocatalytic decomposition of methylene blue in aqueous solution under 443 nm laser light irradiation was found to be technically feasible using Ag/AgCl nanoparticles as photocatalysts. The effects of various experimental parameters, such as irradiation time, light source, catalyst loading, initial dye concentration, pH, and laser energy on decolorization and degradation were investigated. The mineralization of methylene blue was confirmed by chemical oxygen demand analysis. The results demonstrate that the laser-induced photocatalytic process can effectively degrade methylene blue under the optimum conditions (pH 9.63, 4 mg/L MB concentration, and 1.4 g/L Ag/AgCl nanoparticles).
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin 300072, China. Electronic address: lxh@tju.edu.cn.
authors.forename: Xianhua
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin 300072, China.
authors.forename: Yulou
authors.initials: Y
authors.lastname: Yang
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, No. 92, Weijin Road, Nankai District, Tianjin 300072, China.
authors.forename: Xiaoxuan
authors.initials: X
authors.lastname: Shi
authors.affiliation: School of Environmental Science and Engineering, Nankai University, Tianjin 300074, China. Electronic address: likx@nankai.edu.cn.
authors.forename: Kexun
authors.initials: K
authors.lastname: Li
mesh_terms: D054023:Lasers, Semiconductor; D008751:Methylene Blue / Q000737:chemistry*; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry; D010782:Photolysis; D012834:Silver / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D012834:Silver; D008751:Methylene Blue
keywords: Decolorization; Degradation; Methylene blue; Photocatalysis; Visible laser