background: it has recently been shown that the particle size of materials used for radiation shielding can affect the magnitude of radiation attenuation. over the past years, application of nano-structured materials in radiation shielding has attracted attention world-wide. the purpose of this study was to investigate the shielding properties of the lead-free shields containing micro and nano-...

A three-layered photoanode has been synthesized by the introduction of an additional layer of mixed WO3 and Fe2O3. A total of nine differently-packaged films were prepared by sol-gel method. The fabricated photoanodes were then successfully characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). A comparative study was also...

The epoxidation of propene without forming a substantial amount byproducts is one the holy grails catalysis. Supported Cu, Ag and Au catalysts are studied for this reaction activity supported metals generally well understood. On contrary, limited information available on influence support epoxide selectivity. with equal amounts hydrogen oxygen was tested over gold nanoparticles deposited onto C...

In this paper, we report the preparation of visible-light active direct Z-scheme Cu2O/WO3 nanocomposite photocatalyst by a solid-state reaction avoiding otherwise inevitable formation CuWO4 phase in wet syntheses. Structure, morphology, and thermal optical properties prepared WO3 nanoplatelets decorated Cu2O were investigated XRD, Raman spectroscopy, SEM/TEM, combined thermogravimetric (TG)/dif...

Tungsten nano-oxides of WO3 and H2WO4 have been studied as promising candidates for photocatalytic chromic materials. To date, nanoparticles are generally prepared by hydrothermal synthesis, which requires high temperature environment pH adjustment. In this paper, we report on fabricating via photosynthesis UV irradiation the solution made from dissolving tungsten in hydrogen peroxide. Similarl...

Lead free potassium sodium niobate (KNN) piezoceramics were synthesized via conventional solid state sintering route. Nano and micron WO3 were separately added to KNN through ball-milling. Dielectric and piezoelectric properties of samples sintered in the temperature range of 1110°-1145°C were measured by precision LCR-meter and APC d33-meter devices. The results revealed that micron WO3 partic...

Sensor technology is one of the most significant technology for the future with a constantly growing number of applications, ranging from toxic gas detection, manufacturing process monitoring to medical diagnosis and health monitoring. Among the different existing sensor technologies, the semiconductor sensors are most attractive for their high sensitivity, small size and light-weight construct...