title: One-pot hydrothermal synthesis of uniform β-MnO2 nanorods for nitrite sensing.
abstract: A simple hydrothermal method was developed for the synthesis of uniform single-crystal β-MnO(2) nanorods only using potassium permanganate and sodium nitrite in acidic solution, without any seed or template. The as-prepared β-MnO(2) nanorods have the average diameter of 300±20 nm and a length up to 1.2±0.2 μm. Moreover, the effects of pH, temperature, and reactant molar ratios on the morphology of the final product were studied in detail. In addition, the catalytic ability of the as-prepared β-MnO(2) nanorods was tested for the electrooxidation of nitrite. The resulting sensor showed a wide linear range from 0.29 μM to 26.09 mM (R=0.9986), high sensitivity (1.21 μA mM(-1), S/N=3), low detection limit (0.29 μM), and fast response (less than 5 s).
authors.affiliation: College of Chemistry and Life Science, College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China.
authors.forename: Jiu-Ju
authors.initials: JJ
authors.lastname: Feng
authors.forename: Pei-Pei
authors.initials: PP
authors.lastname: Zhang
authors.forename: Ai-Jun
authors.initials: AJ
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Wen-Ju
authors.initials: WJ
authors.lastname: Dong
authors.forename: Jian-Rong
authors.initials: JR
authors.lastname: Chen
mesh_terms: D006358:Hot Temperature; D017895:Manganese Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D008422:Materials Testing; D043942:Nanotubes / Q000737:chemistry*; D010087:Oxides / Q000138:chemical synthesis* / Q000737:chemistry; D011196:Potassium Permanganate / Q000737:chemistry; D012977:Sodium Nitrite / Q000032:analysis* / Q000737:chemistry*
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D011196:Potassium Permanganate; C027424:manganese oxide; D012977:Sodium Nitrite