The photocatalytic degradation of a binary textile dyes mixture within a new configuration of loop reactor using ZnO thin film-phytotoxicity control

ZnO thin film were deposited by Spray and Spray Pyrolysis methods on glass substrates at 370 °C. The structural characterization by XRD, Raman spectroscopy, FTIR, EDS, TEM, SEM, RPE and XPS revealed the purity of ZnO Wurtzite variety in both samples. The use of a new loop reactor configuration for the photocatalytic activity was evaluated against/with respect to the degradation of two textile dyes as well as their binary mixture. The ZnO thin film prepared by Spray Pyrolysis kept its photocatalytic properties even after 20 reuse cycles (148 h). The treated solution showed better biodegradability and the absence of phytotoxicity.