Preparation and Photocatalytic Property of Ag Modified Titanium Dioxide Exposed High Energy Crystal Plane (001)

Abstract

TiO2 exposed high energy crystal plane (001) was prepared by the sol-gel process using butyl titanate as the titanium source and hydrofluoric acid as the surface control agent. Ag-TiO2 was prepared by depositing Ag on the crystal plane of TiO2 (101) with a metal halide lamp. The surface morphology, interplanar spacing, crystal phase composition, ultraviolet absorption band, element composition, and valence state of the samples were characterized by using field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD), ultraviolet-visible absorption spectrum (UV-Vis-Abs), and X-ray photoelectron spectroscopy (XPS), respectively. The formation mechanism of high energy crystal plane (001) was discussed, and the photocatalytic activities were evaluated by following degradation of methyl orange. The results show that TiO2 exposed the (001) crystal plane with a ratio of 41.8%, and Ag can be uniformly deposited on the crystal plane of TiO2 (101) by means of metal halide lamp deposition. Under the same conditions, the degradation rate of methyl orange by deposited Ag-TiO2 reaches as much as 93.63% after 60 min using the metal halide lamp (300 W) as an illuminant, 81.89% by non-deposited samples and 75.20% by nano-TiO2, causing a certain blue shift in the light absorption band edge of TiO2. Ag-TiO2 has the best photocatalytic performance at a pH value of 2.

Silver@mesoporous Anatase TiO2 Core-Shell Nanoparticles and Their Application in Photocatalysis and SERS Sensing

“…For the purpose of treating dye contaminations in wastewater, their accurate detection [4][5][6] and degradation are one of the expressed problems to be solved. Different kinds of physical, chemical and biochemical measures have been devoted to deal with these problems, including membrane separation [7], advanced oxidation [8], photocatalytic degradation [9,10] and anaerobic treatment [11]. Among them, photocatalysis technique employed in wastewater treatment has great promise, because it can create strong oxidation agents to break down organic matters into carbon dioxide and water.…”

Ag-enriched TiO2 nanocoating apposite for self-sanitizing/ self-sterilizing/ self-disinfecting of glass surfaces

“…GIXRD patterns of anatase Ag–TiO 2 NCs in all enriching concentrations exhibited prominent peaks around angular location (2θ) of 25.0°, 38.0°, 48.0°, and 55.0° indexed to the crystal planes (101), (004), (200), and (211), respectively. The most pronounced diffraction peak appeared about 25.0° corresponding to the (101) crystal plane in all the samples which confirmed the occurrence of anatase phase of Ag–TiO 2 [ 31 ]. The angular location of almost all the peaks remained invariant in respect of different concentrations except the occurrence of a shift towards lower 2θ value (from 55.0° to 54.0°) in the peak positions observed at 1.5% and 2.5% concentrations.…”

A novel core–shell Pd(0)@enSiO2–Ni–TiO2 nanocomposite with a synergistic effect for efficient hydrogenations

“…7c) with distances of 0.234 nm, 0.243 nm and 0.203 nm corresponding to the (111), (001), and (111) planes of palladium, titania and nickel, respectively, were also observed. 43,44 Periodic lattice fringes observed with a spacing of 0.336 nm can be ascribed to the interference lattice fringes of Pd and Ni. 30,42…”