To improve the photo-catalytic degradation of salicylic acid, we reported the fabrication of ordered TiO2 nanotube arrays by a simple and effective two-step anodization method and then these TiO2 nanotubes were treated in a methanol solution under UV light irradiation. The TiO2 nanotubes prepared in the two-step anodization process showed better photo-catalytic activity than those prepared in o...

ZnO and Mn-ZnO nano powders were prepared by the sol-gel auto combustion method. The products were characterized by X-ray diffraction (XRD), energy dispersive analysis of X-ray (EDX) and scanning electron microscopy (SEM). Structural and morphological properties of nano particles were investigated and the average crystalline size of ZnO and Mn-doped ZnO was obtained 44 and 51 nm, respectively. ...

in recent years, the effects of heterogeneous catalysts for the oxidation of organic and inorganic pollutants in industrial wastewaters are spread. traditionally, these reactions are usually carried out using suspensions of photo-catalysts such as tio2. a chemical method including ticl4, al(no3)3, ethanol amine, ethyl acetoacetate and aqueous ammonia were used for the fabrication of tio2-al2o3 ...

Laser Raman spectra, UV-visible spectra, and photo-catalytic activity measurements are described which show that supported MoO,iTiOr catalysts prepared by impregnation possess a layer of surface molybdate species coordinated to the titania support. The saturation coverage of this surface molybdate monolayer corresponds to a surface density of ca. 4 x lOI MO atoms per cm2 of TiO*. The properties...

htvb}+OH--'OHOrhlvb)+H2OT"'OH+Htq [5] These active species of oxygen as well as eand ht.b) would support a wide variety of Ti02 dependent photo-induced catalytic reactions, oxidation, oxidative cleavage, reduction, geometric and valence isomerization, substitution, condensation, and polymerizatien.i) We showed here that NOi is oxidized by・OH and reduced by e', producing NOi and NO, respectively...

htvb}+OH--'OHOrhlvb)+H2OT"'OH+Htq [5] These active species of oxygen as well as eand ht.b) would support a wide variety of Ti02 dependent photo-induced catalytic reactions, oxidation, oxidative cleavage, reduction, geometric and valence isomerization, substitution, condensation, and polymerizatien.i) We showed here that NOi is oxidized by・OH and reduced by e', producing NOi and NO, respectively...

Understanding of the dynamic process of laser-induced ultrafast electron tunneling is still very limited. It has been thought that the photo-catalytic reaction of adsorbents on the surface is either dependent on the number of resultant electron-hole pairs where excess energy is lost to the lattice through coupling with phonon modes, or dependent on irradiation photon wavelength. We used UV (355...

Finding the active sites of catalysts and photo-catalysts is crucial for an improved fundamental understanding and the development of efficient catalytic systems. Here we have studied the photo-activated dehydrogenation of ethanol on reduced and oxidized rutile TiO2(110) in ultrahigh vacuum conditions. Utilizing scanning tunnelling microscopy, various spectroscopic techniques and theoretical ca...