A facile one-pot hydrothermal synthesis of β-MnO2 nanopincers and their catalytic degradation of methylene blue

Iron impregnated carbon materials with improved physicochemical characteristics

“…Thus, it can be inferred that the surface modification of raw AC via iron impregnation and surface oxidation, not only enhanced the surface activity of the substrate but also increased its chemical behavior as well. A similar justification of the results have been reported by Cheng et al [71], while using commercial ␤-MnO 2 and H 2 O 2 oxidized ␤-MnO 2 nanopincers as catalysts for the removal of MB from the aqueous system. However, the MB removal percentage in our case is higher (up to 99%) than their observed value (90%) and even much better than the MB removal efficiency reported by Xiao et al [73].…”

“…The values are very close to the binding energies reported by Wang et al [70]. Furthermore, two distinct peaks corresponding to the binding energies of 642 and 653 eV for Mn were also observed in the XPS spectra of M1 and M3, representing the Mn 2p 5/2 and Mn 2p 3/2 respectively, again showing the different oxidation states for Mn [71]. In addition to these elements, some weaker peaks for K 2p and S 2p at 297 and 169 eV, respectively, were also observed for the iron-impregnated carbon materials [72].…”

Preparation of PEDOT/GO, PEDOT/MnO2, and PEDOT/GO/MnO2 nanocomposites and their application in catalytic degradation of methylene blue

“…Among the various catalysts, MnO 2 is considered as one of the most outstanding metal oxides on new catalytic oxidation systems, due to its relative low price, chemical stability, and non-toxic property. By now, many efforts have been made on the application of MnO 2 in battery materials, supercapacitor, and catalysts [5][6][7][8][9][10]. However, few studies have attention on the conductive polymers/MnO 2 composites in water treatment.…”

Synthesis and Characterization Composite of Mno2/Graphene/Mwcnt: An

“…In comparison with other carbon materials, GO has the perfect sp 2 hybrid carbon nanostructure and various oxygen groups including epoxide, hydroxyl, carbonyl, and carboxyl groups. In addition, the conjugation of GO with semiconductor solid particles results in catalysts with improved charge separation, reduced recombination of the photo generated electron-hole pairs, increased specific surface area, and an adequate quantity of adsorption sites, which could lead to the enhancement of degradation efficiency of wastewater [8][9]. On account of the above mentioned advantages, the reasonable combination of MWCNT, GO and MnO2 would produce some novel composites with excellent catalytic performance.…”