Brazilein modified zinc oxide nanorods with enhanced visible light-responsive photocatalytic efficiency

Abstract

Photocatalytic efficiency of ZnO nanorods has been investigated with respect to the concentration of brazilein. Brazilein modified ZnO nanorods were prepared by an impregnation process with 1.0%w/v, 2.5%w/v, and 5.0%w/v of brazilein solution. In order to correlate the variation in concentration distributions and photocatalytic performance, the phase composition, optical properties, and photo-catalytic activities of brazilein modified ZnO nanorods prepared with different brazilein concentrations have been investigated and compared to an unmodified ZnO nanorods. The photocatalytic properties were measured in terms of indigo carmine degradation under visible light irradiation. It was found that ZnO nanorods with the highest visible light-responsive photocatalytic efficiency were achieved by the modification of 5.0%w/v of brazilein resulting in indigo carmine degraded faster than the case of unmodified ZnO nanorod about 60% within 5 h.

Carbon Dots Modification Surface of Titanium Dioxide and Their Photocatalytic Activity

“…For each experiment, 0.05 g of the photocatalyst was suspended in 50 mL of IC (5.0 × 10 −5 M) in the dark for 30 minute to allow the adsorption/ desorption equilibrium between the photocatalyst and IC. The suspension was irradiated under 18 W fluorescence lamps (TL-D 18 W/865 Philips tube light) [20,21]. With stirring and irradiation, 5 mL of the suspension was collected every 60 min.…”

Nano-ZnO prepared by using chaya and mango leaves extract for photocatalyst of methylene blue

“…This phenomenon shows that MB dye degradation is slowed due to the limited number of simultaneous reactions. Previous research [61,62] stated that surface profile influenced photoactivity of photocatalytic materials. Furthermore, reduction and oxidation reactions on nano-ZnO surface produce electrons and holes, which interact with oxygen (O2) and water molecules to form superoxide radicals (O 2-) and hydroxyl (OH•) [23].…”

Optical and Crystal Structure Properties of ZnO Nanoparticle Synthesized through Biosynthesis Method for Photocatalysis Application

“…ZnO NPs particles form during a heating or calcination reaction that accumulates ZnO NPs crystallites. This process has revealed the presence of chemical compounds (phenols and flavonoids) in M. indica leaves, which act as reducing and stabilizing agents by reducing zinc ions to the 0-valence state [31,76].…”