Synthesis of TiO₂ on different substrates by chemical vapor deposition for photocatalytic reduction of Cr(VI) in water

Abstract

TiO2 loaded on several substrates such as carbon fiber, aluminum plate, silica plate, and glass plate was prepared using the chemical vapor deposition (CVD) method for the photocatalytic reduction of Cr(VI) in water with the presence of ethanol under Ultraviolet (UV) illumination. As‐prepared samples were characterized by X‐Ray Diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), and scanning electron microscopy (SEM). The catalyst with TiO2 loaded on carbon fiber possessed an extremely large surface area (1,463,91 m2/g), while the other catalysts possessed small surface areas (0.05–0.21 m2/g). The photocatalytic activity of TiO2 loaded on carbon fiber, which was determined by the conversion of Cr(VI) and the degradation of chemical oxygen demand (COD), was much higher than that of other catalysts. The reusability of TiO2 loaded on carbon fiber catalyst exhibited almost the same activity as the fresh catalyst. The results indicated that TiO2 loaded on carbon fiber is feasible for practical application.

Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

“…TiO 2 nanoparticle is one of the most proper and popular semiconductors whose applications cover diverse industrial areas including photocatalysis [1,2], thin-lm, sunscreen, photovoltaic, electrodes [3,4], sensors [5,6], and drug delivery [7,8]. In this regard, TiO 2 nanoparticle have been prepared through different methods, including sol-gel [9], inverse micelle [10,11], hydrothermal [12], straight oxidation [13][14][15], chemical vapor deposition [16][17][18], physical vapor deposition [19][20][21], electrochemical accumulation [22][23][24], sonochemical [25], microwave [26][27][28], and organometallic complex compounds [29][30][31][32][33][34]. However, almost all of the mentioned methods require high temperature (usually more than 500) [35].…”

Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

“…TiO 2 nanoparticle is one of the most proper and popular semiconductors whose applications cover diverse industrial areas including photocatalysis [1,2], thin-lm, sunscreen, photovoltaic, electrodes [3,4], sensors [5,6], and drug delivery [7,8]. In this regard, TiO 2 nanoparticle have been prepared through different methods, including sol-gel [9], inverse micelle [10,11], hydrothermal [12], straight oxidation [13][14][15], chemical vapor deposition [16][17][18], physical vapor deposition [19][20][21], electrochemical accumulation [22][23][24], sonochemical [25], microwave [26][27][28], and organometallic complex compounds [29][30][31][32][33][34]. However, almost all of the mentioned methods require high temperature (usually more than 500) [35].…”

Insight into the influence of defect sites in mixed phase of mesoporous titania nanoparticles toward photocatalytic degradation of 2‐chlorophenol: Effect of light source

“…This is owing to its ability to mineralize various types of organic pollutants into harmless compounds. [4,5] Nonetheless, the ability of TiO 2 is inhibited by two factors, which are fast electron-hole recombination and can only be activated under UV-light irradiation because of its large band gap. [6,7] However, these drawbacks can be overcome through structure modification to increase porosity and form site defects, which are Ti 3+ site defects (TSDs) and oxygen vacancies (OVs).…”