Ultra-fast green synthesis of a defective TiO photocatalyst towards hydrogen production.

An ultra-fast green synthesis of defective titanium dioxide (TiO) photocatalysts was conducted by the microwave-assisted method using l-ascorbic acid (l-As) as a reducing agent. Effect of l-As concentrations on the chemical-, optical- and photoelectrochemical properties as well as the photocatalytic performance towards the hydrogen (H) production was explored. The obtained TiO nanoparticles (NPs) illustrated the brown fine powders with different brownness levels depending on the concentrations of l-As.

Highly efficient ZnO/WO nanocomposites towards photocatalytic gold recovery from industrial cyanide-based gold plating wastewater.

Discharging the gold-contained wastewater is an economic loss. In this work, a set of ZnO/WO was facile synthesized by hydrothermal method in order to recover gold from the industrial cyanide-based gold plating wastewater by photocatalytic process. Effect of ZnO contents coupled with WO was first explored.

Photosynthesis of Au/TiO nanoparticles for photocatalytic gold recovery from industrial gold-cyanide plating wastewater.

A series of Au/TiO nanoparticles (NPs) with different gold loadings (x = 0.1-1.0 wt%) was synthesized by the photodeposition and then employed as photocatalysts to recover precious component from the industrial gold-cyanide plating wastewater.

Photocatalytic Recovery of Gold from a Non-Cyanide Gold Plating Solution as Au Nanoparticle-Decorated Semiconductors.

In this work, a photocatalytic process was carried out to recover gold (Au) from the simulated non-cyanide plating bath solution. Effects of semiconductor types (TiO, WO, NbO, CeO, and BiO), initial pH of the solution (3-10), and type of complexing agents (NaSO and NaSO) and their concentrations (1-4 mM each) on Au recovery were explored. Among all employed semiconductors, TiO exhibited the highest photocatalytic activity to recover Au from the simulated spent plating bath solution both in the absence and presence of complexing agents, in which Au was completely recovered within 15 min at a pH of 6.

Biosorption of dicloxacillin from pharmaceutical waste water using tannin from Indian almond leaf: Kinetic and equilibrium studies.

This study focused on the use of Indian almond leaf biomass, a local plant widely found in Thailand, on removal of dicloxacillin from pharmaceutical waste water by biosorption. The biosorption characteristics of dicloxacillin were investigated in terms of equilibrium, kinetics and thermodynamics. Optimum biosorption conditions were determined from pH, initial dicloxacillin concentration, biomass dosage, contact time, and temperature.