A highly active bi-crystalline photocatalyst consisting of TiO2 (B) nanotube and anatase particle for producing H2 gas from neat ethanol

Abstract

Sodium titanate nanotubes (NaTNTs) are converted into monoclinic TiO 2 (B) nanotubes by rinsing with 0.10 M HCl followed by drying at 573 K. As calcination temperature is increased to 673 K, these TiO 2 (B) nanotubes start to transform into anatase nanoparticles producing a bi-crystalline mixture consisting of TiO 2 (B) nanotubes and anatase nanoparticles. The primary particle size of the anatase particles was estimated to be around 10 nm using Scherrer equation. After being promoted with 1% Pt, this bi-crystalline material becomes a very active photocatalyst producing 20% more H 2 gas than 1% Pt/Degussa P-25 TiO 2 in the photocatalytic dehydrogenation of neat ethanol after 2 h of UV light irradiation.

TiO2 Processed by pressurized hot solvents as a novel photocatalyst for photocatalytic reduction of carbon dioxide

“…It has been reported that the photocatalytic performance of bicrystalline TiO 2 photocatalysts is higher than of single-phase TiO 2 photocatalysts [36][37][38]. Mostly the anatase-rutile heterojunction has been studied and it was confirmed the anatase-rutile bicrystalline TiO 2 shows a higher photocatalytic activity due to a lower recombination rate.…”

Enhanced photocatalytic activity of TiO2 nanofibers and their flexible composite films: Decomposition of organic dyes and efficient H2 generation from ethanol-water mixtures

“…Using photocatalysts to degrade organic compounds on surfaces has attracted considerable attention in the [36][37][38]. Protons formed by the reaction between holes and water, as well as organic compounds, are reduced by electrons injected previously into the metal nanoparticles recent years, due to possible applications in selfcleaning coatings and antimicrobial surfaces [39][40][41][42].…”

Hydrothermal synthesis of TiO2 nanotubes from concentrate of titanium ore of Pizhemskoe deposit (Russia)

“…In recent decades one-dimensional nanostructure materials, derived from titanium dioxide, have been widely used in photocatalysis, as a base for catalysts, implants, reagents enhancing blood coagulability, batteries etc. [1][2][3][4][5].…”