Durability of a coating containing titanium dioxide for the photocatalytic degradation of diclofenac in water with UV‐A irradiation

Abstract

A novel catalyst was used for lab scale photocatalytic experiments. It was a carbon doped titanium dioxide which was designed to create an energy efficient photocatalytic process. The titanium dioxide is able to absorb UV‐A radiation and parts of the visible light spectrum. The catalyst was immobilized to a glass sheet. UV‐A radiation was used for the degradation of the pharmaceutical diclofenac in water to investigate the applicability of the catalyst to degrade organic micropollutants. With the given experimental setup hydroxyl radicals were generated and diclofenac was degraded below the limit of quantification. However, reaction rates are rather slow and the material properties of the catalyst showed the need of improvement. This is because the properties of the coating were influenced by the release of inorganic binder. Therefore, the coating and possibly the titanium dioxide were washed off and the reaction rates decreased drastically after 80 hours of use.

Efficient photocatalytic degradation of bisphenol A by green synthesized CuO decorated nickel hexacyanoferrate nanocomposite

“…Plastic debris pollution has caused serious threats to living organisms worldwide as a result of the extensive use of plastic products and their mismanagement. As a result of anthropogenic inputs, the released toxic and carcinogenic industrial effluents from plastic waste include heavy metals, substituted phenols, plastic additives, dyes and spilled oils, seriously damaged water quality (Liu et al, 2021; Schulze‐Hennings et al, 2017; Tarafdar et al, 2022). Bisphenol A (BPA) is one of the highest produced industrial chemicals globally and is the most representative chemical of polymeric polycarbonates and epoxy resin (Dehghani et al, 2016; Pfeifer et al, 2015).…”

Recent advances in removal of pharmaceutical pollutants in wastewater using metal oxides and carbonaceous materials as photocatalysts: a review

“…In view of this, the following photocatalytic methods have been used in the removal of diclofenac from water. 665–748…”

“…668 TiO 2 nanofilm membranes fixed on glass panels have also been explored in the removal of diclofenac sodium from wastewater under UV irradiation. 669 Schulze-Hennings et al 670 studied the durability of the coating containing TiO 2 on glass for the photocatalytic degradation of diclofenac sodium in water using UVA irradiation. The effectiveness of ZnO and V 2 O 5 has also been tested in the photocatalytic degradation of diclofenac sodium in water under solar and UV irradiation.…”