Photocatalytic removal of methyl orange using Ag/Zn–TiO₂nanoparticles prepared by different methods

Abstract

A B S T R A C TAg/Zn-TiO 2 nanoparticles were synthesized via two different methods: sol-gel method in the presence of ethanol under refluxing temperature and sol-gel low-temperature route in the presence of acetic acid under 0˚C. The prepared samples were characterized by X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, N 2 adsorption-desorption isotherm, and Brunauer-Emmett-Teller analysis methods. The effects of preparation method on the crystalline structure, crystal size, and surface area of prepared Ag/Zn-TiO 2 nanoparticles were studied. Photocatalytic activity of synthesized nanoparticles was tested by photocatalytic removal of methyl orange (MO) under UV light radiation. The effects of preparation method, initial dye concentration, and recyclability of photocatalysts were studied. Ag/Zn-TiO 2 nanoparticles prepared via sol-gel method showed high photocatalytic activity during degradation of MO under UV light radiation due to increase in the specific surface area, total pore volume, and decrease in the crystallite size.

Silver and manganese co-doped titanium oxide aerogel for effective diclofenac degradation under UV-A light irradiation

“…5. According to IUPAC classification, all the solids display type IV profiles with hysteresis loops characteristic of bottle-type pore structure with narrow neck and wide bodies, indicating that the powders synthesized by sol-gel method have a mesoporous structure [34]. The BJH curves show that all the photocatalysts were homogeneous with monomodal pore size distribution.…”

TiO2-graphene/chitosan nanocomposite: preparation and its application for removal of anionic dyes

“…Chitosan, which was of analytical grade, was purchased from Sigmae Aldrich, USA. TiO2 nanoparticles were prepared by sol-gel method according to our previous work [17].…”

Preparation and Photocatalytic Effect of Cu2+-Doped TiO2 Nanoclusters

“…Peaks of CuO is not found due to the lower content of Cu. The average crystal size of the Cu 2+ -doped TiO2 nanoparticles have been found out using the most intense reflection (1 1 0) by Debye -Scherrer formula, D = 0.89λ/bcosθ, where D is the mean crystallite size, λ is the wavelength of X-ray, θ is the Bragg angle, and b is the half width of the full maximum [11,12]. The crystallite size of Cu 2+ -doped TiO2 nanoparticles are found to be 40 and 61 nm for 1 and 3 wt% Cu 2+ -doped TiO2 nanoparticles, respectively which is agrees with the earlier report of Gorska et al [13].…”