title: Electrocatalytic reduction of ortho nitrobenzaldehyde using modified aluminum electrode and its determination.
abstract: A simple, cost effective and rapid electrochemical method has been developed for the determination of micro level ortho nitrobenzaldehyde (ONB) based on outstanding properties of modified aluminum electrode tin nanorods/anodic aluminum oxide/aluminum (SnNR/AAO/Al) for the first time. The SnNR/AAO/Al electrode was fabricated by a second step anodization, followed by electrodeposition and its electrochemical behavior was investigated in detail. The cyclic voltammetry results indicated that the SnNR/AAO/Al electrode exhibited efficient electrocatalytic activity toward reduction of ONB in the acidic solution. It provides an appreciable improvement of reduction peak for ONB at -0.721V. Furthermore, various kinetic parameters such as transfer electron number, transfer proton number and standard heterogeneous rate constant were calculated from the scan rates. The electrocatalytic behavior was further exploited as a sensitive detection scheme for the ONB determination by differential pulse voltammetry. Under the optimized conditions, the concentration range and detection limit are 0.1-100 μmol/L and 0.05 μmol/L, respectively, for ONB. The analytical performance of this modified sensor has been evaluated for detection of real sample such as river water and recovery of ONB was achieved all-out up to 102.3% under standard addition method.
authors: Advanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem 636011, India. Electronic address: alaguraj2@rediffmail.com.
authors: Vairamuthu
authors: V
authors: Raj
authors: Advanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem 636011, India. Electronic address: silambuchemist@gmail.com.
authors: Jayachandran
authors: J
authors: Silambarasan
authors: Advanced Materials Research Laboratory, Department of Chemistry, Periyar University, Salem 636011, India.
authors: Panchanathan
authors: P
authors: Rajakumar
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D001547:Benzaldehydes / Q000737:chemistry*; D002384:Catalysis; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D018625:Microscopy, Atomic Force
chemical_list: D001547:Benzaldehydes; C043850:2-nitrobenzaldehyde; D000535:Aluminum
keywords: Aluminum electrode; Anodic aluminum oxide; Cyclic voltammetry; Electrochemical sensor; Organic pollutant; Ortho nitrobenzaldehyde; Tin nanorods