Photocatalytic hydrogen production by reforming of methanol using Au/TiO2, Ag/TiO2 and Au-Ag/TiO2 catalysts

Kennedy, Julia; Jones, Wilm; Morgan, David; Bowker, Michael; Li, Lu; Kiely, Christopher J.; Wells, Peter P.; Dimitratos, Nikolaos

doi:10.1179/2055075814y.0000000006

Cited by 19 publications

(13 citation statements)

References 40 publications

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“…Interesting, as compared the rate constant with that of TiO 2 /SnO x /Au reported previously(0.014 min −1 ) 27 , it could be found that the k values of the samples(0.019 min −1 for TiO 2 /Ag/SnO 2 (2 wt%)) even exhibited an increased photocatalytic activity. In the previous report, it was suggested that the electron trapping capability of Au was excellent than that of Ag upon the higher electron affinity of Au NPs, which inevitably give rise to a higher photocatalytic activity for the Au modified photocatalysts 46 . In this work, the abnormal higher activity of TiO 2 /Ag/SnO 2 can be attributed to the intimate connection among the Ag, SnO 2 and TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

Zhang

et al. 2018

Sci Rep

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Novel TiO2/Ag/SnO2 composites were successfully prepared by a facile one-step reduction approach using stannous chloride as both SnO2 precursor and reducing agent. The Ag nanoparticles with sizes of 2.04–3.94 nm were located on TiO2 matrix and immobilized by the surrounded SnO2. The resulted TiO2/Ag/SnO2 nanocomposites were used as photocatalyst for photodegradation of methylene blue under visible light. The experimental results demonstrated that the visible light photocatalytic activity of the TiO2/Ag/SnO2 was significantly enhanced in comparison with the individual TiO2 or the binary composite (TiO2/Ag or TiO2/SnO2) and the degradation rate was up to about 9.5 times that of commercial TiO2. The photocatalytic activity of the TiO2/Ag/SnO2 composites could be well controlled by simply tuning the dosages of Ag precursor and the optimized activity of the composites was obtained when the dosage of Ag precursor was 2%. Moreover, the TiO2/Ag/SnO2 photocatalyst exhibited high stability for degradation of methylene blue even after four successive cycles.

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Section: Resultsmentioning

confidence: 99%

Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

Zhang

et al. 2018

Sci Rep

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“…[317,318] Theh ydrogen produced by photocatalysis is not pure. [319] Recently,K ennedy et al [320] have produced hydrogen by methanol reforming by using aA u-Ag/TiO 2 photocatalyst prepared by sol immobilization. Thus, hydrogen is accompanied by different speciess uch as CO 2 , alkanes, and aldehydes.…”

Section: Reviewsmentioning

confidence: 99%

“…Thus, hydrogen is accompanied by different speciess uch as CO 2 , alkanes, and aldehydes. [319] Recently,K ennedy et al [320] have produced hydrogen by methanol reforming by using aA u-Ag/TiO 2 photocatalyst prepared by sol immobilization. In their report, the authors study the effect of the gold loading over the Au/TiO 2 catalysts.…”

Section: Hydrogen Generationmentioning

confidence: 99%

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

et al. 2018

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Environmental and energy problems have drawn much attention owing to rapid population growth and accelerated economic development. For instance, photocatalysis, "a green technology", plays an important role in solar-energy conversion owing to its potential to solve energy and environmental problems. Recently, many efforts have been devoted to improving visible-light photocatalytic activity by using titanium dioxide as a photocatalyst as a result of its wide range of applications in the energy and environment fields. However, fast charge recombination and an absorption edge in the UV range limit the photocatalytic efficiency of TiO under visible-light irradiation. Many investigations have been undertaken to overcome the limitations of TiO and, therefore, to enhance its photocatalytic activity under visible light. The present literature review focuses on different strategies used to promote the separation efficiency of electron-hole pairs and to shift the absorption edge of TiO to the visible region. Current synthesis techniques used to elaborate several nanostructures of TiO -based materials, recent progress in enhancing visible photocatalytic activity, and different photocatalysis applications will be discussed. On the basis of the studies reported in the literature, we believe that this review will help in the development of new strategies to improve the visible-light photocatalytic performance of TiO -based materials further.

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“…5-100 mM. 16,[34][35][36][37][38][39][40][41] At such low concentrations, the application of these forms of characterization becomes challenging.…”

Section: Introductionmentioning

confidence: 99%

Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization

et al. 2019

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Photocatalytic hydrogen production by reforming of methanol using Au/TiO₂, Ag/TiO₂ and Au-Ag/TiO₂ catalysts

Cited by 19 publications

References 40 publications

Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization

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