Large-scale synthesis of Au–WO₃ porous hollow spheres and their photocatalytic properties

Abstract

Uniform Au–WO3 porous hollow spheres have been synthesized on a large-scale by a general in situ reaction. The hybrid materials exhibit excellent activity for visible-light photocatalytic degradation of organic pollutants.

Achieving One Part Per Billion Hydrogen Sulfide (H2S) Level Detection through Optimizing Composition and Crystallinity of Gold-Decorated Tungsten Trioxide (Au-WO3) Nanofibers

“…An interesting correlation emerges where increases in the Au concentration, calcination duration, and calcination temperature reduce the band gap energy. These measured band gap energies correspond closely with values reported in previous studies, demonstrating a consistent pattern with our work. – The reduction of band gap can be elucidated by the presence of intermediate states within the conduction and valence bands of the WO 3 host structure. The reduction in band gap energy can be explicated through the introduction of intermediary energy states within the conduction and valence bands of the host matrix with additional Au.…”

Pulse Electrodeposited Au–WO3 Catalyst from a Water–Ionic Liquid Microemulsion for Photoaccelerated Methanol Electrooxidation

“…The emergence of an n-type tungsten oxide (WO 3 ) photoanode as a suitable support for plasmonic noble-metal electrocatalysts is because of its suitable band gap ( E g ∼ 2.8 eV) and good charge-transport properties. , However, to achieve the desired characteristics, many approaches such as phase modification, − size-controlled noble-metal particles, , and controlled loading concentration have been explored to restrict the charge recombination process and improve the photoefficiency of the WO 3 photoanode . However, these studies provide better insights, specifically for the photoelectrochemical water splitting process, whereas the systems having heterojunctions are not investigated in detail so far for the photoaccelerated methanol electrooxidation reaction process.…”

Nano‐WO3‐SO3H as a New Photocatalyst Insight Through Covalently Grafted Brønsted Acid: Highly Efficient Selective Oxidation of Benzyl Alcohols to Aldehydes

“…conducted an investigation about designing hybrid Au‐WO 3 porous hollow spheres as a significant and simple approach for decomposing organic contaminants under visible light irradiation which could be developed to large scales. By considering Au nanoparticles properties such as high conductivity and strong localized surface plasmon resonance (LSPR) effect as a driving force of this study, Au was selected as suitable nominee for coupling with WO 3 which increasing charge transport led to promote the photoactivity of Au‐WO 3 . In 2014, Villa et al .…”