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Menelisi C. Dlamini,Mbongiseni L. Dlamini,Pumza Mente,Boitumelo Tlhaole,Rudolph Erasmus,Manoko S. Maubane-Nkadimeng,John A. Moma 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
A simplistic solvothermal process to fabricate novel amorphous TiO2-BiOBr-Bentonite (A-TiO2-BiOBr-Bt)multidimensional photocatalysts in this work is a practical and economically feasible technique for thefabrication of the reported photocatalysts as it is a one-pot process. The stickiness of the A-TiO2-BiOBr-Bt wet cake and the low drying temperature make A-TiO2-BiOBr-Bt a feasible platform compositefor the fabrication of the photoreactive inner coating of water treatment containers for photocatalytictreatment of drinking water. The A-TiO2-BiOBr-Bt photocatalyst with an A-TiO2:BiOBr:Bt mass ratio of1:1:2 (Ti1Bi1Bt2) displayed the highest BET surface area of 124.8 m2/g, a low bandgap of 2.86 eV, and sufficientlylow electron-hole recombination rate. The high number of A-TiO2-BiOBr p-n heterojunctions,and the Ti-O-Si and Bi-O-Si bonds between A-TiO2-BiOBr and Bt in Ti1Bi1Bt2 lowered its electron-holerecombination rate with enhanced visible light-harvesting ability. Within 70 min of visible light irradiation,150 mg of Ti1Bi1Bt2 gave 100% conversion of 100 mL of 20 ppm phenol with a pseudo-first-order rateconstant of 0.0322 min1 at pH 4.0. Scavenging experiments showed superoxide radicals (O2) and electrons(e) being the most dominant reactive oxidation species (ROS) responsible for the phenol photodegradationprocess while holes (h+) and hydroxyl radicals (OH) also exerted appreciableparticipation.