In this study, graphitic carbon nitride (g-C3N4) was made by thermal condensation of melamine at 450 and 550 ° C. Moreover, the TiO2 porous nanostructured electrode as a substrate for the g-C3N4 deposition was fabricated by anodization method on a titanium foil (Ti) and then, Reduced by electrochemical method to improve electrical conductivity (Re-TiO2 NP). The graphite carbon nitride layers were deposited on the porous nanostructured electrode (Re-TiO2 NP/Ti) by electrophoretic technique and the g-C3N4/Re-TiO2 NP/Ti electrodes were used as supercapacitor electrode. Comparison of the supercapacitive properties of the synthesized electrodes showed that the electrochemical efficiency and specific capacitance of the g-C3N4 (450)/Re-TiO2 NP/Ti electrode is higher than the g-C3N4 (550)/Re-TiO2 NP/Ti electrode. This behavior was resulted from the increased active sites, the enhanced charge transport and hydrophilicity due to higher nitrogen content of the g-C3N4 (450)/Re-TiO2 NP/Ti electrode.

Nano photo-catalyst coatings, exposed to high-energy photons, have the ability to remove toxic organic compounds from gaseous and aqueous environments. But these coatings, due to lower surface area, are less efficient than nanoparticles. Microstructure of these coatings should be modified in order to improve their efficiency. In this study, nanostructured TiO2/Al2O3 heterogeneous films were synthesized by the sol-gel method. Quartz sheets were used as the substrates, and Al2O3 and TiO2 sols were, in turn, deposited on these substrates by the spin coating method, respectively. The deposited layers were sintered at 800oC and 500oC, respectively. Crystallization of gamma-alumina and anatase phases was confirmed by X-ray diffraction (XRD). The average crystallite size of the anatase films was measured to be about 30 nm by using scanning electron microscopy (SEM). UV-vis absorption spectroscopy was used to calculate the energy gap, and based on the measured absorption wavelengths; the total gaps were calculated to be 3.81 eV and 4.47 eV, for TiO2 and TiO2/Al2O3 layers, respectively. The emission spectra obtained by the photoluminescence analysis were used to confirm the oxygen vacancy formation. Our results showed that, by the addition of Al2O3, neutral oxygen vacancies may be thermodynamically stable stabilized in TiO2.

Heart diseases are one of the most common and important diseases in the world. These diseases kill millions of people every year and impose huge costs on societies. Therefore, accurate and precision diagnosis and measurement of cardiac drugs are of particular importance. Voltammetry is one of the most common techniques for measuring drugs. Also, porous nanostructures have shown a high potential to improve the sensitivity and precision of the measurement of cardiac drugs using the voltammetry techniques. Recently, various types of porous nanostructures have been used to modify the voltammetric electrodes for the measurement of cardiac drugs. In the present paper, firstly, the porous nanostructures that are used to measure various types of drugs are introduced, and then, the ability of the modified electrodes to measure these drugs by the voltammetric techniques has been investigated and discussed.

In the present study, Ni-TiO2-Al2O3 nanocomposite coating was electrodeposited in various concentrations of particles from Watts type bath on alloying steel. Increasing in the reinforcement affected the surface morphology and caused to grain refinement of coating. The effect of distribution of the particles on coating property investigated. According to the result, by increasing the amount of reinforcement in coating, microhardness was increased and reached to its maximum amount 425 Vickers at 7.9 wt.%.

Since woven fabrics have uniqe characteristrics such as light weight, flexibility, high strength, etc. and they are also capable to be improved for mechanical properties by nano thechnology, it is expectal to gain more efficient composite using intrinsic properties of the ceramic nanoparticles and proper coating method. The uniqe properties of the nanoparticles such as high elastic modulus, high strength to weight ratio etc. as well as participating in defeat mechanisms agains external loadings, can be of the factors reinforcing the textiles. Al2O3-13%TiO2 coatings were deposited on Kevlar Fabric substrates from nanostructured powders using atmospheric plasma spraying (APS). A complete characterization of the feedstock confirmed its nanostructured nature. Coating microstructures and phase compositions were characterized using SEM, and XRD techniques. The microstructure comprised two clearly differentiated regions. One region, completely fused, consisted mainly of nanometer-sized grains of a-Al2O3 with dissolved Ti+4. The other region, partly fused, retained the microstructure of the starting powder and was principally made up of nanometer -sized grains of g-Al2O3, as confirmed by FESEM. Coatings were in average slightly lower than the values for nanostructured coating. The results of tensile testing on kevlar fabrics before and after coating showed that APS could improve tensile strength up to 60%. High velocity impact test (V50) performed on coated fabrics well indicated that their ballistic limit experienced a significant increase. In addition, the results of V50 showed revealed that APS can decrease final weight of new composite panel compared to plain polyetylen panel with identical protection level.