Synthesis of Niobium Doped ZnO Nanoparticles by Electrochemical Method: Characterization, Photodegradation of Indigo Carmine Dye and Antibacterial Study

Niobium doped Zincoxide nanoparticles has been synthesized through electrochemical method and characterized by UV-Visible spectroscopy, IR Spectroscopy, SEM, XRD, ICPMS and EDAX data. The UV-Visible spectroscopy result reveals that the band gap energy of ZnO/Nb2O5 nanoparticles to be 3.8 eV. The XRD results show that the crystallite size is to be 31.9 nm. The ICPMS data indicate the presence of 3,3461,328 counts of 93 Nb and 577,906,390 counts of 66 Zn. An improvement in the photocatalytic degradation of Indigocarmine dye (IC) in comparison to commercially available pure ZnO was observed. The photodegradation efficiency for ZnO/Nb2O5 and ZnO were found to be 97.4% and 52.1% respectively. The enhancement in photocatalytic activity of ZnO/ Nb2O5 was ascribed to the extended light absorption range and suppression of electron hole pair recombination upon Nb loading. The antibacterial activity of ZnO/Nb2O5 nanoparticles was investigated. These particles were shown to have an effective bactericide.

铌基镀铂电极的研制

铂铌电极强度高，耐腐蚀，导电性好，催化活性高，广泛应用于阴极保护、电解工业、离子水制备等领域中。为此，利用正交试验法研究了通过水溶液电镀制取铂铌电极的工艺，确定了铌基镀铂的最优工艺条件为：15g／LPt（NH3）2（NO2）2·2H2O，100g／L NH2OSO2H，4g／L添加剂L（胺类有机物），电流密度50—150A/m^2，温度60—80℃。该电镀液均镀能力良好，阴极电流效率为32％，可获得致密的10μm厚光亮铂镀层。制得的铌铂电极性能良好。