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      Self-organized vanadium and nitrogen co-doped titania nanotube arrays with enhanced photocatalytic reduction of CO 2 into CH 4

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          Abstract

          Self-organized V-N co-doped TiO 2 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 TiO 2 photocatalysts show remarkably enhanced photocatalytic activity for the CO 2 photoreduction to methane under ultraviolet illumination. The mechanism of the enhanced photocatalytic activity is discussed in detail.

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          High-rate solar photocatalytic conversion of CO2 and water vapor to hydrocarbon fuels.

          Oomman Varghese, Maggie Paulose, Thomas Latempa … (2009)
          Efficient solar conversion of carbon dioxide and water vapor to methane and other hydrocarbons is achieved using nitrogen-doped titania nanotube arrays, with a wall thickness low enough to facilitate effective carrier transfer to the adsorbing species, surface-loaded with nanodimensional islands of cocatalysts platinum and/or copper. All experiments are conducted in outdoor sunlight at University Park, PA. Intermediate reaction products, hydrogen and carbon monoxide, are also detected with their relative concentrations underlying hydrocarbon production rates and dependent upon the nature of the cocatalysts on the nanotube array surface. Using outdoor global AM 1.5 sunlight, 100 mW/cm(2), a hydrocarbon production rate of 111 ppm cm(-2) h(-1), or approximately 160 microL/(g h), is obtained when the nanotube array samples are loaded with both Cu and Pt nanoparticles. This rate of CO(2) to hydrocarbon production obtained under outdoor sunlight is at least 20 times higher than previous published reports, which were conducted under laboratory conditions using UV illumination.
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            Determination of the V2p XPS binding energies for different vanadium oxidation states (V5+ to V0+)

            Geert Silversmit, Diederik Depla, Hilde Poelman … (2004)
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              Titanium nitride oxidation chemistry: An x‐ray photoelectron spectroscopy study

              Naresh Saha, Harland G. Tompkins (1992)
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                Author and article information

                Contributors
                Dandan Lu
                Min Zhang
                Zhihua Zhang
                Qiuye Li
                Xiaodong Wang
                Jianjun Yang
                Journal
                Journal ID (nlm-ta): Nanoscale Res Lett
                Journal ID (iso-abbrev): Nanoscale Res Lett
                Title: Nanoscale Research Letters
                Publisher: Springer
                ISSN (Print): 1931-7573
                ISSN (Electronic): 1556-276X
                Publication date Collection: 2014
                Publication date (Electronic): 29 May 2014
                Volume: 9
                Issue: 1
                Page: 272
                Affiliations
                [1 ]Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People's Republic of China
                Article
                Publisher ID: 1556-276X-9-272
                DOI: 10.1186/1556-276X-9-272
                PMC ID: 4050103
                PubMed ID: 24948893
                SO-VID: 60e43a98-0f77-49a6-96f5-c9cb25b3226a
                Copyright © Copyright © 2014 Lu et al.; licensee Springer.
                License:

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

                History
                Date received : 26 March 2014
                Date accepted : 21 May 2014
                Categories
                Subject: Nano Express

                ScienceOpen disciplines: Nanomaterials
                Keywords: tio2,photocatalytic,co2,nanotube,ch4
                Data availability:
                ScienceOpen disciplines: Nanomaterials
                Keywords: tio2, photocatalytic, co2, nanotube, ch4

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