Bi nanosphere-decorated oxygen-vacancy BiOBr hollow microspheres with exposed (110) facets to enhance the photocatalytic performance for the degradation of azo dyes

Abstract

In this work, a novel composite photocatalyst of Bi nanospheres-decorated oxygen-vacancy BiOBr hollow microspheres with exposed (110) facets has been successfully synthesized via the hydrothermal method. And the morphological, structural,...

The bandgap of sulfur-doped Ag2O nanoparticles

“…7a) due to achievement of adsorption–desorption equilibrium. 38,39 The stirring (in the dark) was continued for another 5 minutes but no further change in RhB concentration was observed. After this period, the visible light irradiation was switched on to start the photocatalysis experiment.…”

Sulfated lignocellulose nanofibril supported flower-like BiOBr with oxygen vacancies towards absorption–photocatalytic synergetic removal of organic pollutants

“…40 Creating oxygen vacancies on the surface of a photocatalyst is a typical surface defect engineering method, and it is an efficient strategy to improve the photocatalytic activities. 43 Moreover, as an electron capture center, oxygen vacancies can improve the adsorption and activation of oxygen and the transfer of charge to the reactants. 40,44 Importantly, LCNFs combine the advantages of lignin and NC, exhibit better performance than NC, and have enormous potential as a photocatalyst carrier material.…”

Robust Photocatalytic MICROSCAFS® with Interconnected Macropores for Sustainable Solar-Driven Water Purification

“…Seldomly reported, the photocatalysts are susceptible to mechanical stress and eventual fracture caused by the stirring in the batch reactor, generating smaller particles and a higher surface area, which overestimates the photocatalytic performance and jeopardizes the claimed easy removal of the photocatalysts after a test. Also, porosity data, like specific surface area and pore diameter, are not properly discussed or even totally or partially missing in some papers in the literature [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], neglecting possible synergies and effects granted by the catalytic supports in what regards, e.g., mass transfer. Concerning the particle size, most of the reported microspherical supports are usually very small, ranging from 0.5 to 3 µm [ 18 , 19 , 20 , 21 , 23 , 24 , 25 ], which may impose problems and extra complexity and costs in a real-life application, in what regards the setup and recovery aspects.…”

“…Also, porosity data, like specific surface area and pore diameter, are not properly discussed or even totally or partially missing in some papers in the literature [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], neglecting possible synergies and effects granted by the catalytic supports in what regards, e.g., mass transfer. Concerning the particle size, most of the reported microspherical supports are usually very small, ranging from 0.5 to 3 µm [ 18 , 19 , 20 , 21 , 23 , 24 , 25 ], which may impose problems and extra complexity and costs in a real-life application, in what regards the setup and recovery aspects.…”