Effect of crystal phase composition on the reductive and oxidative abilities of TiO2 nanotubes under UV and visible light

Schulte, Kevin L.; DeSario, Paul A.; Gray, Kimberly A.

doi:10.1016/j.apcatb.2010.04.017

Cited by 104 publications

(71 citation statements)

References 23 publications

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“…Hydrogen and carbon monoxide were detected as the intermediate reaction products with their relative concentrations underlying hydrocarbon production rates. Schulte et al (2010) reported similar results.…”

Section: Introductionsupporting

confidence: 90%

Photocatalytic conversion and kinetic study of CO2 and CH4 over nitrogen-doped titania nanotube arrays

Delavari

Amin

Ghaedi

2016

Journal of Cleaner Production

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Section: Introductionsupporting

confidence: 90%

Photocatalytic conversion and kinetic study of CO2 and CH4 over nitrogen-doped titania nanotube arrays

Delavari

Amin

Ghaedi

2016

Journal of Cleaner Production

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“…Consequently, a reasonable calcination temperature must be selected such that increased crystallinity is achieved with the surface area remaining intact and unchanged. Su et al [255], Vijayan et al [259] and Schulte et al [260] demonstrated that their optimum activities were strongly dependent on the crystallinity of their nanostructures. Su et al [255] showed that optimal photocatalytic activity for decomposition of salicylic acid can be achieved with the sample calcined at 773K.…”

Section: Thermal Treatmentmentioning

confidence: 98%

Review of material design and reactor engineering on TiO2 photocatalysis for CO2 reduction

Ola

Maroto‐Valer

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

830

416

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Please cite this article as: Oluwafunmilola Ola, M.Mercedes Maroto-Valer, Review of material design and reactor engineering on TiO2 photocatalysis for CO2 reduction, Journal of Photochemistry and Photobiology C:Photochemistry Reviews http://dx. Graphical abstract HighlightsAlternative fuels can be produced from CO 2 reduction driven by light and catalysts. TiO 2 has been widely studied due to its desirable properties for CO 2 photoreduction.Physicochemical properties of TiO 2 have been modified by various routes.Performance can be improved by modification of both catalyst and reactor systems.Step change transformation is still required for scalable fuel production to occur. AbstractThe continuous combustion of non-renewable fossil fuels and depletion of existing resources are intensifying the research and development of alternative future energy options that can directly abate and process ever-increasing carbon dioxide (CO 2 ) emissions. Since CO 2 is a thermodynamically stable compound, its reduction must not consume additional energy or increase net CO 2 emissions. Renewable sources like solar energy provide readily available and continuous light supply required for driving this conversion process. Therefore, the use of solar energy to drive CO 2 photocatalytic reactions simultaneously addresses the aforementioned challenges, while producing sustainable fuels or chemicals suitable for use in existing energy infrastructure. Recent progress in this area has focused on the development and testing of promising TiO 2 based photocatalysts in different reactor configurations due to their unique physicochemical properties for CO 2 photoreduction. TiO 2 nanostructured materials with different morphological and textural properties modified by using organic and inorganic compounds as photosensitizers (dye sensitization), coupling semiconductors of different energy levels or doping with metals or non-metals have been tested. This review presents contemporary views on state of the art in photocatalytic CO 2 reduction over titanium oxide (TiO 2 ) nanostructured materials, with emphasis on material design and reactor configurations. In this review, we discuss existing and recent TiO 2 based supports, encompassing comparative analysis of existing systems, novel designs being employed to improve selectivity and photoconversion rates as well as emerging opportunities for future development, crucial to the field of CO 2 photocatalytic reduction. The influence of different operating and morphological variables on the selectivity and efficiency of CO 2 photoreduction is reviewed. Finally, perspectives on the progress of TiO 2 induced photocatalysis for CO 2 photoreduction will be presented.

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“…Several researchers have reported that V 4+ species were the active sites on V based TiO 2 catalysts for the photodegradation of ethene [21], toluene [39] and methylene blue [40]. Furthermore, it is generally accepted that V 4+ can act as both an electron and hole trap and thus charge separation can be favoured by the charge transfer transition from V 4+ to the conduction band of Ti 4+ level, while V 5+ can serve as an electron acceptor only [39,41]. The substitution of Ti 4+ with increasing Cr atoms in the crystal lattice causes lattice deformation owing to the rearrangement of the neighbouring atoms compensating for charge deficiency.…”

Section: Photocatalytic Reduction Of Comentioning

confidence: 98%

Transition metal oxide based TiO2 nanoparticles for visible light induced CO2 photoreduction

Ola

Maroto‐Valer

2015

Applied Catalysis A: General

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a b s t r a c tThe development of nanostructured visible light photocatalytic systems capable of harnessing the energy from the sun is imperative for producing carbon based fuels and chemicals. V-, Cr-and Co-TiO 2 photocatalysts immobilized onto quartz plates were successfully prepared by sol-gel method, investigated as a function of metal concentration and tested for visible light induced CO 2 reduction for the first time.Results established that introduction of these metal ions into the host framework not only modified the crystallinity of TiO 2 , but influenced its light absorption properties as well. Enhanced bathochromic shift from the UV region to longer wavelengths in the visible light region was observed with increasing metal concentrations for all samples especially Cr. The photoconversion rates were remarkably enhanced by the metal doped TiO 2 supports when compared to pure TiO 2 , with the Co-TiO 2 samples having the highest photoconversion rates.

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Effect of crystal phase composition on the reductive and oxidative abilities of TiO2 nanotubes under UV and visible light

Cited by 104 publications

References 23 publications

Photocatalytic conversion and kinetic study of CO2 and CH4 over nitrogen-doped titania nanotube arrays

Photocatalytic conversion and kinetic study of CO2 and CH4 over nitrogen-doped titania nanotube arrays

Review of material design and reactor engineering on TiO2 photocatalysis for CO2 reduction

Transition metal oxide based TiO2 nanoparticles for visible light induced CO2 photoreduction

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