Enhanced photodegradation of methyl orange with TiO₂nanoparticles using a triboelectric nanogenerator

Abstract

Methyl orange (MO) can be degraded by a photocatalytic process using TiO₂ under UV irradiation. The photo-generated holes and electrons can migrate to the surface of TiO₂ particles and serve as redox sources that react with adsorbed reactants, leading to the formation of superoxide radical anions, hydrogen peroxide and hydroxyl radicals involved in the oxidation of dye pollution. Here, we fabricated a polytetrafluoroethylene-Al based triboelectric nanogenerator (TENG) whose electric power output can be used for enhancing the photodegradation of MO with the presence of TiO₂ nanoparticles, because the TENG generated electric field can effectively boost the separation and restrain the recombination of photo-generated electrons and holes. Due to the photoelectrical coupling, the degradation percentages of MO for 120 min with and without TENG assistance are 76% and 27%, respectively. The fabricated TENGs have potential applications in wastewater treatment, water splitting, and pollution degradation.

WO3/TiO2 core–shell nanostructure for high performance energy-saving smart windows

“…Smart building materials have attracted considerable research and development interest due to potential applications such as smart building glazing, self-cleaning exterior tiles, and anti-fogging mirrors [1][2][3][4]. Among transition metal oxides, tungsten trioxide (WO 3 ) and titanium dioxide (TiO 2 ) exhibit excellent electrochromic properties, environmental purification, and self-cleaning properties [2,5,6].…”

Efficient photodegradation of methyl violet dye using TiO2/Pt and TiO2/Pd photocatalysts

“…4) illustrated that the degradation efficiency of TiO 2 /Pd nanoparticles was higher than TiO 2 /Pt and pure TiO 2 nanoparticles. Figure 4c shows oxidants, which attack the dye molecules and as a result degradation of dye molecules occur (Su et al 2013;Sakthivel et al 2004;Chnirheb et al 2012). The major possible reactions are believed to be as follows, which is also illustrated in the Fig.…”

“…Also it has the ability to degrade organic pollutants in water and atmosphere due to its chemical stability and suitable band gap energy (Zori 2011). However, the low separation efficiency of charges and relatively high recombination of photo-generated carriers limit the photocatalytic efficiency of TiO 2 (Su et al 2013).…”

Immobilization of Nano-sized TiO2 on Glass Plate for the Removal of Methyl Orange and Methylene Blue

“…The photo-generated holes and electrons can migrate to the surface of TiO 2 particles and serve as redox sources that react with adsorbed reactants, leading to the formation of superoxide radical anions, hydrogen peroxide and hydroxyl radicals involved in the oxidation of dye. The mechanism of the photodegradation of dye by using TiO 2 is proposed as follows [7]:…”