title: Facile decolorization of methylene blue with flower-like manganese wads.
abstract: Flower-like manganese wads (MWs) were synthesized via a simple and inexpensive ultrasonic irradiation method for the first time. MWs were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray and transmission electronic microscopy. The decolorization efficiency of MWs for methylene blue (MB) azo dye was examined as a function of pH, stirring time, MW dosage and initial concentration of the MB solution. Results show that MWs have excellent decolorization performance for MB with a higher efficiency (and without using H2O2 or other devises such as UV light and ultrasonic irradiation) compared to other catalysts, such as the mixture of Mn3O4 and H2O2 (with a maximum decolorization rate of 99.7% in 3 h), ZnS and CdS under light irradiation (with a maximum decolorization rate of 73% in 6 h), and sulfate modified titania under solar radiation (with a maximum decolorization rate of nearly 100% in 4 h).
authors.affiliation: Department of Materials Science and Engineering, Tsinghua University, Beijing 100085, China E-mail: yangaili770117@126.com.
authors.forename: Aili
authors.initials: A
authors.lastname: Yang
authors.affiliation: Department of Environmental Engineering, University of Delaware, Newark, DE 19716, USA.
authors.forename: Chinpao
authors.initials: C
authors.lastname: Huang
authors.affiliation: Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA.
authors.forename: Bingqing
authors.initials: B
authors.lastname: Wei
authors.affiliation: Department of Materials Science and Engineering, Tsinghua University, Beijing 100085, China E-mail: yangaili770117@126.com.
authors.forename: Zhengjun
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D005240:Feasibility Studies; D008345:Manganese / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D008345:Manganese; D008751:Methylene Blue