title: Bio-silica coated with amorphous manganese oxide as an efficient catalyst for rapid degradation of organic pollutant.
abstract: A novel rapid green one-step method is developed for the preparation of bio-silica coated with amorphous MnO2 nanoparticles by treating bio-silica with an acidic permanganate solution. The method developed has the advantage of selectively coating the surface of either one or both sides of the porous silica structure with a thin catalytic active amorphous MnO2 layer in a controlled way. The uncoated and MnO2 coated bio-silica are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The catalytic activity of amorphous MnO2-coated bio-silica is examined by degrading organic dye at ambient condition. The as-synthesized samples show highly efficient and rapid degradation of Rhodamine B. The simplicity and cost-effectiveness of the materials and method can be very useful for highly efficient degradation of organic pollutants for environmental remediation.
authors: School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, South Korea.
authors: T D
authors: TD
authors: Dang
authors: A N
authors: AN
authors: Banerjee
authors: M A
authors: MA
authors: Cheney
authors: S
authors: S
authors: Qian
authors: S W
authors: SW
authors: Joo
authors: B K
authors: BK
authors: Min
mesh_terms: D002384:Catalysis; D004785:Environmental Pollutants / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods; D017895:Manganese Compounds / Q000737:chemistry*; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D009930:Organic Chemicals / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D004785:Environmental Pollutants; D017895:Manganese Compounds; D009930:Organic Chemicals; D010087:Oxides; C027424:manganese oxide; D012822:Silicon Dioxide