A series of SnO2-ZnO composite nanostructured (thin) films with different amounts of SnO2 (from 0 to 50 wt %) was prepared and deposited on a miniaturized porous alumina transducer using the sol-gel and dip coating method. The transducer, developed by our research group, contains Au interdigital electrodes on one side and a Pt heater on the other side. The sensing films were characterized using...

In this paper, we show that the ionic conduction through surface chemisorbed ambient moisture leads to a remarkably high and selective response towards hydrogen gas at room temperature. The adsorbed water molecules acts as states, due porous granular nature of ZnO nanoparticles 20 ± 5 nm size. This is depicted deviation from Arrhenius behavior near temperatures. further enhanced 5% 71% for 1200...

ZnO thin films were prepared on glass substrates at low (5 × 10-4 mbar) and high (3 × 10-3 mbar) sputter pressure using dc reactive magnetron sputtering. The structural, morphological, compositional and optical properties of the thin films were investigated. XRD patterns of both films confirmed the polycrystalline nature of the films with hexagonal Wurtzite structure. SEM study indicates that t...

In this work, zinc oxide powder with a rectangular-shaped porous architecture, made of numerous spherical nanometric particles,was obtained. A simple precipitation/decomposition procedure was used comprising a zinc oxalate intermediate, obtained from zinc sulfate and oxalic acid without any additives. Detailed studies on zinc oxalate dehydration, decomposition and zinc oxide formation, were car...

The crystal structures of different forms of TiO2 and those of BaTiO3, ZnO, SnO2, WO3, CuO, Fe2O3, Fe3O4, ZrO2 and Al2O3 nanoparticles have been deduced by powder X-ray diffraction. Their optical edges have been obtained by UV-visible diffuse reflectance spectra. The photocatalytic activities of these oxides and also those of SiO2 and SiO2 porous to oxidize iodide ion have been determined and c...

Dye-sensitized solar cells (DSCs) have been intensively studied as a promising alternative to the conventional Si-based solar cells due to the their good features such as low cost and high power conversion efficiency. 3 The main component of the DSCs is the photoanode, which is composed of a highly porous semiconducting oxide network on which a close-packed monolayer of dye molecules is formed ...

The recent growth in the field of porous and nanometric materials prepared by non-conventional processes has stimulated the search of new applications of ZnO nanoparticulate. Zinc oxide is an interesting semiconductor material due to its application on solar cells, gas sensors, ceramics, catalysts, cosmetics and varistors. In this work, the precipitation method was used followed by controlled a...

Antidepressants are one of the main pollutants in aquatic environment. They being widely studied due to their widespread use, possible health effects, and partial removal from wastewater treatment plants by conventional methods. Photocatalysis is an effective ecologically beneficial method treatment. In present study, photocatalytic degradation sertraline hydrochloride (SERT) water using nano-s...