Photoreduction of CO2 in an optical-fiber photoreactor: Effects of metals addition and catalyst carrier

Nguyen, The-Vinh; Wu, Jeffrey C.S.

doi:10.1016/j.apcata.2007.11.022

Cited by 139 publications

(62 citation statements)

References 33 publications

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“…The decrease in CO evolution at higher Cu loading could be possibly due to the shading effect, which reduced the TiO 2 photoexcitation capacity. In addition, higher Cu content (above 1.0 wt%) may lead to the formation of recombination hubs, specifically when there is the largest production of electron-hole pairs using co-doped metals [35]. From the above demonstration, it is obvious that copper is the most active dopant to enhance TiO 2 photoactivity.…”

Section: Photoreduction Of Co 2 With Hmentioning

confidence: 95%

Photocatalytic CO2 reduction with H2 as reductant over copper and indium co-doped TiO2 nanocatalysts in a monolith photoreactor

Tahir

Amin

2015

Applied Catalysis A: General

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Section: Photoreduction Of Co 2 With Hmentioning

confidence: 95%

Photocatalytic CO2 reduction with H2 as reductant over copper and indium co-doped TiO2 nanocatalysts in a monolith photoreactor

Tahir

Amin

2015

Applied Catalysis A: General

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“…The size of the catalyst crystals or aggregates (0.05 m to a few m) determines the nature of separation process required which could be expensive and time consuming [6,11]. Furthermore, the penetration depth of UV light into the reaction medium can also be limited by the strong light absorption of organic species and catalyst particles [4,12]. The performance comparison between Pd/Rh loaded TiO 2 suspended in H 2 O or immobilized onto ceramic honeycomb monoliths (supports) was demonstrated by Ola et al [7] for CO 2 photoreduction.…”

Section: Introductionmentioning

confidence: 99%

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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“…In particular, either carbon dioxide pressure or irradiance is considerably lower than those reported in most of literature, in which the photon energetic input was extremely high [9,81,82].…”

Section: Characterisation Of the Unpromoted Tio2 Photocatalystmentioning

confidence: 45%

Sustainable Carbon Dioxide Photoreduction by a Cooperative Effect of Reactor Design and Titania Metal Promotion

et al. 2018

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An effective process based on the photocatalytic reduction of CO 2 to face on the one hand, the crucial problem of environmental pollution, and, on the other hand, to propose an efficient way to product clean and sustainable energy sources has been developed in this work. Particular attention has been paid to the sustainability of the process by using a green reductant (water) and TiO 2 as a photocatalyst under very mild operative conditions (room temperature and atmospheric pressure). It was shown that the efficiency in carbon dioxide photoreduction is strictly related to the process parameters and to the catalyst features. In order to formulate a versatile and high performing catalyst, TiO 2 was modified by oxide or metal species. Copper (in the oxide CuO form) or gold (as nanoparticles) were employed as promoting metal. Both photocatalytic activity and selectivity displayed by CuO-TiO 2 and Au-TiO 2 were compared, and it was found that the nature of the promoter (either Au or CuO) shifts the selectivity of the process towards two strategic products: CH 4 or H 2 . The catalytic results were discussed in depth and correlated with the physicochemical features of the photocatalysts.

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Photoreduction of CO2 in an optical-fiber photoreactor: Effects of metals addition and catalyst carrier

Cited by 139 publications

References 33 publications

Photocatalytic CO2 reduction with H2 as reductant over copper and indium co-doped TiO2 nanocatalysts in a monolith photoreactor

Photocatalytic CO2 reduction with H2 as reductant over copper and indium co-doped TiO2 nanocatalysts in a monolith photoreactor

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

Sustainable Carbon Dioxide Photoreduction by a Cooperative Effect of Reactor Design and Titania Metal Promotion

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