Preparation And Photoelectric Catalysis Performance Of Nickel And Cobalt Composite Oxide

This paper introduces the principle, applications of semiconductor photocatalysisand the recent research progress about the electrode material, and the preparationmethods of CoxNi1-xO nanomaterials were reviewed in the paper. With TiO2NTs,Titanium plate and Carbon paper as base, CoxNi1-xO nanometerial electrode wasprepared, and by using X-ray diffractometer (XRD), field emission scanning electronmicroscopy (SEM), uv-vis diffuse reflection spectra (UV-Vis) and electrochemicalworkstation (CHI660C) analyze its morphology and photoelectric properties. The maincontents are as follows：①Different Co/Ni molar ratios affect the morphology of the CoxNi1-xO/TiO2NTscomposite materials, with the increase of Co/Ni molar ratio, increasing the length of therod and the diameter, and forming the sparse mesh structure.②CoxNi1-xO with different bases composite, such as TiO2NTs, Titanium plateand Carbon paper, by electrochemical impedance spectroscopy experiment confirmed,CoxNi1-xO composite can decrease the electron transfer resistance, with the increase ofCo/Ni molar ratio, the electron transfer resistance trends to the smaller.③By ultraviolet visible (UV-Vis) diffuse reflection spectra indicates,theabsorption band edge of TiO2NTs is about380nm, with the composite of CoxNi1-xO, theabsorption band edge is widen. The corresponding wavelength expands outside thevisible light absorption edge, namely in visible light is easily inspired.④The CoxNi1-xO/TiO2NTs composite materials show the better morphology, thesmaller electron transfer resistance and the better photoelectric response. But due to themagnetic CoxNi1-xO, the separation of electrons and holes in the magnetic materials iseasy to recombination when transferring,and the composite of CoxNi1-xO with differentbases affected the efficiency of photoelectric conversion and maked the photocurrentdroping rapidly.⑤By linear scanning volt-ampere curve test, the composite of CoxNi1-xO withTiO2NTs and Titanium plate shows the better of the Oxygen and Hydrogen evolutionand the response of the visible light. The composite of CoxNi1-xO with TiO2NTsobviously decreased the Hydrogen evolution and Oxygen evolution potential ofTiO2NTs.