Pd Nanoparticles Doped on WO3 Using APT as Raw Material for Gasochromic Sensing of Hydrogen

image of  mechanism of interaction of hydrogen gas with WO3–Pd

image of mechanism of interaction of hydrogen gas with WO3–Pd

Currently, due to the environmental situation worsening, in various countries and especially in the large cities, more and more funds have been allocated for the development of the green energy industry and environmentally friendly technologies. Hydrogen energy is an energy source that has increased its popularity in recent years. It is a clean energy source that can be used instead of fossil fuels. Hydrogen it can be used instead of fossil fuels due to its higher energy content and less environmental impact. The density of hydrogen is lower than the density of air. The gravimetric density of hydrogen energy is generally about seven times higher than the density of fossil fuels.

Read more: Pd Nanoparticles Doped on WO3 Using APT as Raw Material for Gasochromic Sensing of Hydrogen

Preparation of Cobalt Tungstate Powders Applying APT and Agar-Agar from Red Seaweed

image of red seaweed

image of red seaweed

Cobalt tungstate (CoWO4) with monoclinic wolframite structure has been used in a wide range of potential applications including supercapacitors, photocatalysts, catalyst for oxygen evolution reaction (OER) and hydrogen production, microwave dielectric ceramics, photovoltaic electrochemical cells, among others. As electrochemical energy storage devices, batteries and supercapacitors have attracted significant attention due to their intrinsic characteristics of energy and power densities, cycling stabilities and charging-discharging rates.

Read more: Preparation of Cobalt Tungstate Powders Applying APT and Agar-Agar from Red Seaweed

Enhanced Activity of Urea Electrooxidation on Tungsten Carbide Composites Using APT

image of wastewater treatment plant

image of wastewater treatment plant

As a hydrogen carrier for long-term sustainable energy supply, urea (CO(NH2)2) has been attracting increasing attention due to its stable, relatively non-toxic, non-flammable and renewable properties. Recently, the electrooxidation of urea has been used as an effective approach for hydrogen production as well as treatment of urea-rich wastewater.However, the current major challenge is to improve the catalytic activity and CO-tolerance of the catalyst.

Read more: Enhanced Activity of Urea Electrooxidation on Tungsten Carbide Composites Using APT

Production of Tungsten Trioxide Nanoplates with Improving Photocatalytic Activity Utilizing Ammonium Paratungstate

image of scheme of the as-prepared powder

image of scheme of the as-prepared powder

A fabrication process of tungsten oxide (WO3) nanoplates with ammonium paratungstate has been performed, the product showed great photocatalytic activity due to the plate-like shape. Tungsten oxide (WO3) is a promising candidate for semiconductor gas sensors, electrochromic devices and photocatalysts. Structure and morphology of WO3 have obvious influences on its properties and applications. It has been reported that tungsten oxide with mixed structures exhibits poor optical properties, whereas the single-structure tungsten oxide, either hexagonal or cubic, exhibits noticeable absorption capacity.

Read more: Production of Tungsten Trioxide Nanoplates with Improving Photocatalytic Activity Utilizing...

Ammonium Paratungstate Used in Photocatalytic WO3-TiO2 Material

image of WO3-TiO2 powder

image of WO3-TiO2 powder

Employing semiconductor powders as photocatalysis for the degradation of organic pollutants in water has received a lot attention in the last decade. Titanium dioxide (TiO2) inhibits amazing photocatalyst properties including high activity, chemical stability, and low cost. Nevertheless, the photocatalytic activity of TiO2 (with band gap of 3.2 eV and excited by photons with wavelengths under 387 nm) is still limited to irradiation by UV wavelengths, so that photocatalytic process does not occur effectively during the irradiation with solar light as only about 4% of the total radiation of the solar spectrum is in ultraviolet region. Thus, modification of TiO2 in the view to obtain a higher light absorption by shifting absorbance to the visible wavelengths has become the aim of many authors. One of the methods is the coupling of TiO2 with other semiconductors such as TiO2/CdS, TiO2/SnO2, TiO2/ZnO, and TiO2/WO3.

Read more: Ammonium Paratungstate Used in Photocatalytic WO3-TiO2 Material

 

WeChat