Photocatalytic hydrogen production by water/methanol decomposition using Au/TiO2 prepared by deposition–precipitation with urea

Oros-Ruíz, Socorro; Zanella, Rodolfo; López, Rafael; Hernández-Gordillo, Agileo; Gómez, R.

doi:10.1016/j.jhazmat.2013.03.057

Cited by 98 publications

(59 citation statements)

References 45 publications

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“…H 2 pre-treatment lead to a detrimental effect on the hydrogen evolution, as shown in Figure 3. This is in agreement with the results reported by Wu et al [19] and Oros-Ruiz et al [12] for TiO 2 -supported metal photocatalysts, although the H 2 pre-treatment was performed at much higher temperatures in the previous reports. The evolution of photocatalytic hydrogen over a 10 wt% Cu-TiO 2 was studied in the conditions of the initial methanol concentration being 50 vol.% at room temperature for 24 hours, as shown in Figure 4.…”

Section: Photocatalytic Activitysupporting

confidence: 93%

“…Noble metal-loaded TiO 2 has extensively been proved to be a good photocatalyst for hydrogen production, mainly because of its ability to enhance photoproduced electronhole pair separation and photoinduced reduction processes [4,11,12]. However, non-precious metal-loaded TiO 2 may be cost-effective compared with noble metal-loaded TiO 2 since it also shows significant photocatalytic activity in hydrogen generation [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

Udani

Rønning

2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-Photocatalytic hydrogen production from a methanol-water solution was investigated in a semi-continuous reactor over different metal-loaded TiO 2 catalysts under UltraViolet (UV) light irradiation. The catalysts were mainly prepared by the incipient wetness impregnation method by varying the metal weight ratio in the range of 1-10 wt%. The effects of metal loading and H 2 pre-treatment on the photocatalytic activity were investigated. In addition, the activity of the catalysts was also compared with a reference Au-TiO 2 catalyst from the World Gold Council (WGC). The photocatalysts were characterized by using X-Ray Diffraction (XRD) and N 2 physisorption before and after the activity measurements. The photocatalytic activity decreased in the order of Pd > Au > Cu > Co in the comparative study of Cu-TiO 2 , Co-TiO 2 , Au-TiO 2 and Pd-TiO 2 . Optimum hydrogen evolution was achieved with 5 wt% Pd-TiO 2 and 5 wt% Cu-TiO 2 .

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Section: Photocatalytic Activitysupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

Udani

Rønning

2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…11. UV-vis spectra of the TiO 2 -P25, 1%Au@TiO 2 -P25, 3%Au@TiO 2 -P25, 5%Au@TiO 2 -P25 and 10%Au@TiO 2 -P25 catalysts Recent studies (Tanaka et al, 2012;Chen et al, 2011;Oros-Ruiz et al, 2013) found that when Au NPs are irradiated by wavelengths ranging from 500 to 590 nm, electrons from the Au NPs are injected into the conduction band of the titanium dioxide. Those injected electrons have enough energy to reduce the water molecule and produce hydrogen, while the water molecule is oxidized on the surface of the Au NPs.…”

Section: −1mentioning

confidence: 99%

“…By reducing the photogenerated charge carriers, the UV activity is increased due to the electron transfer from the Conduction Band (CB) of TiO 2 to the noble metal nanoparticles (Chen et al, 2011). The photoactivity in the visible range of the electromagnetic spectrum can be explained due to the surface plasmon resonance effect and charge separation by the transfer of photoexcited electrons from the metal nanoparticles to the CB of TiO 2 (Jose et al, 2013;Naldoni et al, 2013;Chen et al, 2011;Gomes-Silva et al, 2011;Murdoch et al, 2011;Baatz et al, 2008;Oros-Ruiz et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Au@TiO<sub>2</sub> NWs and their Catalytic Activity by Water Splitting: A Comparative Study with Degussa P25

Machín¹,

Cotto²,

Duconge³

et al. 2017

American Journal of Engineering and Applied Sciences

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Different amount of gold nanoparticles (1, 3, 5, 10 wt%) were deposited on the surface of synthesized titanium oxide nanowires (TiO 2 NWs) and Degussa P25 (TiO 2 -P25). The results evidenced the presence of small and dispersed gold particles on the surface of TiO 2 NWs and TiO 2 -P25 and an increase in the specific surface area of all the composites. The photocatalytic activity was characterized by measuring the hydrogen production by water splitting, using UV-vis radiation. Au@TiO 2 NWs catalysts showed the highest production of hydrogen (1,436 µmol hg −1 ), with a gold loading of 10 wt%, while in the case of Au@TiO 2 -P25 the hydrogen production was slightly lower (800 µmol hg −1 ), with a gold loading of 5 wt%. The enhancement in the hydrogen production was 11.5 times higher than that reported by the TiO 2 NWs catalyst (125 µmol hg −1 ) and 5.2 times higher than the TiO 2 -P25 (154 µmol hg −1 ). The activity of the catalysts was found to be dependent both on the surface area of the composites and on the amount of gold.

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“…Metal oxide semiconductors are not able to give exact respond to a particular gas from a mixture. Thus at this time, chemical modification, such as doping or surface functionalization, is highly required [135].…”

Section: The Application Of Tnts Arraysmentioning

confidence: 99%

Photon Absorption Enhancement of TiO2 Nanotube Arrays Decorated with Aluminum Nanoparticles

Zhang

Liu

et al. 2017

ECS Trans.

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In this thesis, well-aligned TiO2 nanotubes (TNTs) decorated with aluminum nanoparticles have been fabricated by electrochemical anodization and subsequently magnetron sputtering technique. UV-vis spectroscopy analysis indicate that photon absorption spectrum of crystallized TNTs with Aluminum nanoparticles is extended to visible light band with strong absorption (wavelength 400 -800 nm). Photocurrent characteristics of the TNTs/Al show that the plasmonic nanoparticles Al contribute extra electron-hole pairs to enhance photocurrent under visible light illumination, which further indicate electrons generation, separation and transportation in this system. This thesis gives a systematic study of the subject for photon absorption enhancement of TiO2 nanotube arrays decorated with aluminum nanoparticles.

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Photocatalytic hydrogen production by water/methanol decomposition using Au/TiO2 prepared by deposition–precipitation with urea

Cited by 98 publications

References 45 publications

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

Synthesis and Characterization of Au@TiO<sub>2</sub> NWs and their Catalytic Activity by Water Splitting: A Comparative Study with Degussa P25

Photon Absorption Enhancement of TiO2 Nanotube Arrays Decorated with Aluminum Nanoparticles

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Photocatalytic hydrogen production by water/methanol decomposition using Au/TiO2 prepared by deposition–precipitation with urea

Cited by 98 publications

References 45 publications

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO2

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO2

Synthesis and Characterization of Au@TiO<sub>2</sub> NWs and their Catalytic Activity by Water Splitting: A Comparative Study with Degussa P25

Photon Absorption Enhancement of TiO2 Nanotube Arrays Decorated with Aluminum Nanoparticles

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Product

Resources

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Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂

Comparative Study on The Photocatalytic Hydrogen Production from Methanol over Cu-, Pd-, Co- and Au-Loaded TiO₂