Process intensification in the removal of organic pollutants from wastewater using innovative photocatalysts obtained coupling Zinc Sulfide based phosphors with nitrogen doped semiconductors. (1st August 2015)

• Record Type: Journal Article
• Authors: Vaiano, Vincenzo; Sacco, Olga; Sannino, Diana; Ciambelli, Paolo
• Is Part Of: Journal of cleaner production. Volume 100(2015:Aug. 01)
• Page Start: 208
• Page End: 211
• Publication Date: 2015-08-01
• Subjects: Process intensification -- Photocatalysis -- Removal of organic dyes -- ZnS-based phosphors -- N-doped semiconductors; N-TiO2 N-doped TiO2 -- TTIP titanium tetraisopropoxide -- N-ZnO N-doped ZnO -- ZS zinc sulphate -- ZSP ZnS-based phosphors materials -- 30N-TiO2/ZSP N-TiO2 on ZSP with a nominal loading of 30 wt% -- xN-ZnO/ZSP N-ZnO on ZSP where x is the nominal amount of N-ZnO ranging between 15 and 70 wt% -- MB methylene blue dye -- EBT eriochrome black-T dye; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2015.03.041
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The aim of this preliminary investigation was to verify the possibility of increasing the photoactivity of semiconductors, such as TiO2 and ZnO, with the goal to minimize the volume of slurry-photoreactors to be used in wastewater treatment. The enhancement of photocatalytic activity has been reached through the doping of ZnO and TiO2 nanoparticles with nitrogen and supporting them on ZnS-based luminescent microparticles (phosphors). The coupling of ZnS-based phosphors with N-TiO2 and N-ZnO leads to an increase of the photocatalytic reaction rate in removal of organic dyes from wastewater allowing to reach the process intensification for the large scale design of a photocatalytic system. Highlights: Process intensification in the photocatalytic removal of dyes from wastewater. Innovative photocatalysts for the large scale design of photocatalytic systems. N-TiO2 and N-ZnO coupled with ZnS-based phosphors. High photocatalytic removal rate of methylene blue and eriochrome black-T.