Enhanced photocatalytic degradation of dyes over graphene/Pd/TiO2 nanocomposites: TiO2 nanowires versus TiO2 nanoparticles

Abstract

In this study, at first, TiO nanowire was prepared by an alkaline hydrothermal process. In the following, Gr/Pd/TiO-NPs and Gr/Pd/TiO-NWs were synthesized by a combination of hydrothermal and photodeposition methods. The properties of as prepared products were characterized using XRD, FT-IR, SEM, DRS, TEM, ICP-OES, EDS and TGA analysis. SEM results confirmed nanodimension structure for all samples. Also the band gap values obtained using DRS technique suggests that all the samples have semiconductor behavior. Using TGA analysis, the amount of graphene loaded onto the powders was confirmed. Photocatalytic degradation of rhodamine B by TiO-NWs, Gr/Pd/TiO-NPs and Gr/Pd/TiO-NWs nanocomposites was compared under ultraviolet light irradiation. Results confirmed that the Gr/Pd/TiO-NWs composite show the highest photocatalytic activity due to much higher available surface area of TiO substrate in nanowire structure. It is expected that the synthesis of the high surface area TiO nanowires, facile photodeposition of palladium into its texture, and simple conversion of GO to graphene during hydrothermal process without using strong reducing agents, could be a suitable rote for preparing different types of carbon based TiO nanocomposite photocatalysts.

Kinetics, Thermodynamics, and Modeling of Amido Black Dye Photodegradation in Water Using Co/TiO2 Nanoparticles

“…Different techniques are used to remove amido black from water. These include adsorption, electrochemical process, photodegradation, ultrafiltration, reverse osmosis, coagulation and biochemical process (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35). It is observed that these methods have certain limitations like not fast, which cannot be used at a large scale.…”

Graphitic Carbon Nitride and Titanium Dioxide Modified with 1 D and 2 D Carbon Structures for Photocatalysis

“…[35][36][37][38][39] Another possible application of these materials is the photocatalytic reduction of CO 2 to methane. [35][36][37][38][39] Another possible application of these materials is the photocatalytic reduction of CO 2 to methane.…”

Investigation of role of urea in morphologically controlled synthesis of calcium‐bismuth bimetallic nanoparticles from chicken egg shells and its catalytic and fuel additive applications

“…Ataee‐Esfahani et al have used gold–platinum nanoparticles as an electrocatalyst for methanol oxidation . Masoud Salavati‐Niasari and his coworkers used neodymium vanadate, silver/titania, praseodymium oxide, copper indium sulfide, zirconia, and zinc titania nanoparticles and cupper iron oxide/carbon nanotube/graphene, dysprosium tin oxide/tin oxide, cadmium sulfide/carbon, and palladium/titania/ graphene nanocomposites as photocatalysts for the degradation of various water pollutants. They have proved, through band gap calculations, that bimetallic nanoparticles are good photocatalysts .…”