Effect of iron loading onto mesoporous titania nanoparticles and its photoactivity

Abstract

Titania is proven to be one of the best catalysts for various pollutant degradations. However, it can only be activated under UV light. This research was conducted to further enhance the photoactivity of titania under visible light irradiation by doping with iron metal. Different weight loadings of Fe (3, 5, 7 and 10 wt.%) supported on mesoporous titania nanoparticles (MT) were synthesised via a facile in-situ electrochemical method and denoted as 3FMT, 5FMT, 7FMT and 10FMT to degrade 2-chlorophenol (2-CP). These catalysts were characterised by XRD, FTIR and UV-Vis DRS. The photocatalytic activity of 3FMT was the most effective with 98% degradation probably due to its lowest band gap energy. This work showed that the catalyst functioned best with dosage 0.075 g in a solution of pH 5 and a concentration of 10 mg L−1. Therefore, this study showed great enhancement in the photoactivity of the catalysts especially under visible light irradiation by lowering their band gaps.

Electrogenerated Copper Supported Zinc Oxide for Degradation of 2,4-Dichlorophenol

“…1A/c). The intensity peak of CZ and MZ was slightly decreased by the addition of Cu, indicating that the addition of Cu had little effect on the structure of the catalyst as it was uniformly distributed on the CZ and MZ surface [16]. However, no new peak was observed after adding Cu because the loading of this metal was too low to be detected by XRD [17].…”