Enhanced Photocatalytic Activity of Pure Anatase Tio2 and Pt-Tio2 Nanoparticles Synthesized by Green Microwave Assisted Route

Abstract

High-yield, rapid and facile synthesis of elongated pure anatase titania nanoparticles has been achieved through a nonaqueous microwave-based approach. The residual organics onto nanoparticles surfaces were completely removed through a new treatment under ozone flow, at room temperature in air. Such an ozone cleaning method revealed an effective inexpensive dry process of removing organic contaminants from nanoparticles surfaces. The TiO 2 elongated nanoparticles having a length of 13.8 ± 5.5 nm and a diameter of 9.0 ±1.2 nm were characterized by powder X-Ray diffraction, transmission electron microscopy, selected area diffraction, BET surface area analyzer and FT-IR spectroscopy. Photocatalytic evaluation demonstrated that the as-synthesized ozone-cleaned TiO 2 nanoparticles and TiO 2 nanoparticles loaded with platinum possess excellent Rhodamine B performance with respect to both commercial spherical nanotitania P25 and P25 loaded with platinum. This could be attributed to the anatase phase purity, small size, large specific surface area and clean surfaces of the prepared nanoparticles.

Pyrocatechol violet sensitized Ho-TiO2/ZnO nanostructured material: as photoanode for dye sensitized solar cells

“…The bands at 2970 cm −1 and 2946 cm −1 correspond to symmetric and asymmetric vibration of alkyl chain respectively. The band at 1738 cm −1 confirm the reaction between the acetic acid and TTIP [43,44]. In Ho-doped TiO 2 NPs the vibration band at 445 cm −1 corresponds to the metal oxide single bond in bending mode, in case of Ho-O.…”

“…The peak at 1211 cm −1 indicates Ti-O-Ti vibrations. The peak at 1726 cm −1 correspond to the carbonyl bond clearly indicating the non-hydrolytic sol-gel reaction of TTIP and acetic acid to form ester [42,44]. Sharp band at 509 cm −1 indicates the Zn-O stretching mode [46].…”

Effect of Particle Size on the Performance of TiO2 Based Dye‐Sensitized Solar Cells

“…XRD measurements were conducted for all the prepared TiO 2 samples and the XRD patterns are shown in Figure a. The diffraction peaks corresponding to (101), (004), (200), (105), (211) and (204) crystal planes demonstrate the anatase phase TiO 2 for all the cases . The reflections from (101) basal planes are used to calculate the crystallite sizes of TiO 2 nanoparticles following the Scherrer equation ( 1 ), …”

Preparation of Nickel Ferrite/Carbon Nanotubes Composite by Microwave Irradiation Technique for Use as Catalyst in Photo-Fenton Reaction

“…Advanced oxidation processes (AOPs) are alternative emerging techniques for the degradation of organic pollutants in wastewater [1][2][3][4][5][6] . AOPs are divided in a variety of methods, and among them, heterogeneous Fenton reaction is one of the most interests, which to use iron-based solid catalyst, whose major advantage is its easy recovery from the solution by a field magnetic for further reutilization [7][8][9] .…”