Self-organized vanadium and nitrogen co-doped titania nanotube arrays with enhanced photocatalytic reduction of CO2 into CH4

Abstract

Self-organized V-N co-doped TiO2 nanotube arrays (TNAs) with various doping amount were synthesized by anodizing in association with hydrothermal treatment. Impacts of V-N co-doping on the morphologies, phase structures, and photoelectrochemical properties of the TNAs films were thoroughly investigated. The co-doped TiO2 photocatalysts show remarkably enhanced photocatalytic activity for the CO2 photoreduction to methane under ultraviolet illumination. The mechanism of the enhanced photocatalytic activity is discussed in detail.

Light-Driven Heterogeneous Reduction of Carbon Dioxide: Photocatalysts and Photoelectrodes

“…Nitrogen and vanadium co-doped nanotube arrays, in which vanadium replaced titanium atoms, were also prepared for CO 2 reduction. 184 These catalysts generated methane at rates of 64.5 ppm h −1 cm −2 , even in aqueous media, and were stable over multiple experiments.…”

Photocatalytic reduction of CO 2 into methanol and ethanol over conducting polymers modified Bi 2 WO 6 microspheres under visible light

“…A c c e p t e d M a n u s c r i p t 6 The conducting polymers modified Bi 2 WO 6 composites were prepared by an in situ chemically oxidative polymerization method. A typical synthetic procedure is as follows: 1.0 g as-prepared Bi 2 WO 6 HHMS was suspended in 50 mL of ethanol and stirred for 30 min at 0 o C in the ice-water bath.…”

“…Since then, many studies have been devoted to the semiconductor-based photocatalytic reduction of CO 2 with H 2 O, and the pace has increased enormously in the past decades. A wide range of photocatalysts, such as, V and N doped TiO 2 nanotubes [6], CeO 2 -TiO 2 composite [7], MgO-TiO 2 nanotubes network film [8], SiO 2 Pillared HNb 3 O 8 [9], g-C 3 N 4 /Pt composite [10], sulfur doped g-C 3 N 4 [11], Pt-loaded LaPO 4 [12], Ru- [13] and Ir-complex [14], and ZnGe 2 O 4 [15], have been exploited for the photocatalytic reduction of CO 2 to hydrocarbons. However, many effective photocatalysts are only sensitive to UV light, which only comprises a small fraction of solar energy that reaches the Earth"s surface.…”

Comparison N-Cu–codoped nanotitania and N-doped nanotitania in photocatalytic reduction of CO2 under UV light

“…Significant enhancement of CO 2 photoreduction to CO have been reported for I-doped TiO 2 due to the extension of TiO 2 absorption spectra to the visible light region by I doping [12].There have been literature reports that suggest that co-doping of metal and nonmetal species on TiO 2 leads to enhanced photoreduction activity as compared with single N-doped TiO 2 .For example, Ni and N co-doped TiO 2 for enhanced CO 2 photoreduction as compared to N/TiO 2 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 3 because of a smaller crystal size and higher surface area [13]. The V-N co-doped TiO2 nanotube arrays co-doped TiO2 photocatalysts show remarkably enhanced photocatalytic activity for the CO2 photoreduction to methane under ultraviolet illumination [14].…”