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Ren Su

Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles

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Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles. / Su, Ren; Tiruvalam, Ramchandra; He, Qian; Dimitratos, Nikolaos; Kesavan, Lokesh; Hammond, Ceri; Antonio Lopez-Sanchez, Jose; Bechstein, Ralf; Kiely, Christopher; Hutchings, Graham; Besenbacher, Flemming.

In: A C S Nano, Vol. 6, No. 7, 04.06.2012, p. 6284-6292.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Su, R, Tiruvalam, R, He, Q, Dimitratos, N, Kesavan, L, Hammond, C, Antonio Lopez-Sanchez, J, Bechstein, R, Kiely, C, Hutchings, G & Besenbacher, F 2012, 'Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles', A C S Nano, vol. 6, no. 7, pp. 6284-6292. https://doi.org/10.1021/nn301718v

APA

Su, R., Tiruvalam, R., He, Q., Dimitratos, N., Kesavan, L., Hammond, C., Antonio Lopez-Sanchez, J., Bechstein, R., Kiely, C., Hutchings, G., & Besenbacher, F. (2012). Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles. A C S Nano, 6(7), 6284-6292. https://doi.org/10.1021/nn301718v

CBE

Su R, Tiruvalam R, He Q, Dimitratos N, Kesavan L, Hammond C, Antonio Lopez-Sanchez J, Bechstein R, Kiely C, Hutchings G, Besenbacher F. 2012. Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles. A C S Nano. 6(7):6284-6292. https://doi.org/10.1021/nn301718v

MLA

Vancouver

Su R, Tiruvalam R, He Q, Dimitratos N, Kesavan L, Hammond C et al. Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles. A C S Nano. 2012 Jun 4;6(7):6284-6292. https://doi.org/10.1021/nn301718v

Author

Su, Ren ; Tiruvalam, Ramchandra ; He, Qian ; Dimitratos, Nikolaos ; Kesavan, Lokesh ; Hammond, Ceri ; Antonio Lopez-Sanchez, Jose ; Bechstein, Ralf ; Kiely, Christopher ; Hutchings, Graham ; Besenbacher, Flemming. / Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles. In: A C S Nano. 2012 ; Vol. 6, No. 7. pp. 6284-6292.

Bibtex

@article{76907ef1f2f74d98b5feeb2faea3e8fa,
title = "Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles",
abstract = "Noble metal nanoparticles (Au, Pd, AuPd alloys) with a narrow size distribution supported on nanocrystalline TiO2 (M/TiO2) have been synthesized via a sol-immobilization route. The effect of metal identity and size on the photocatalytic performance of M/TiO2 has been systematically investigated using phenol as a probe molecule. A different phenol degradation pathway was observed when using M/TiO2 catalysts as compared to pristine TiO2.We propose a mechanism to illustrate how the noble metal nanoparticles enhance the efficiency of phenol decomposition based on photoreduction of p-benzoquinone under anaerobic conditions. Our results suggest that the metal nanoparticles not only play a role in capturing photogenerated electrons, but are strongly involved in the photocatalytic reaction mechanism. The analysis of the reaction intermediates allows us to conclude that on M/TiO2 undesired redox reactions that consume photogenerated radicals are effectively suppressed. The analysis of the final products shows that the reusability performance of the catalyst is largely dependent on the pretreatment of the catalyst and the identity of the metal nanoparticle. Interestingly, the as-prepared Pd and AuPd decorated TiO2 materials exhibit excellent long-term photoactivity, in which ∼90% of the phenol can be fully decomposed to CO2 in each cycle.",
keywords = "photocatalysis, TiO2, Au, Pd, AuPd alloys, phenol decomposition mechanism, reusability, CO2 conversion",
author = "Ren Su and Ramchandra Tiruvalam and Qian He and Nikolaos Dimitratos and Lokesh Kesavan and Ceri Hammond and {Antonio Lopez-Sanchez}, Jose and Ralf Bechstein and Christopher Kiely and Graham Hutchings and Flemming Besenbacher",
year = "2012",
month = jun,
day = "4",
doi = "10.1021/nn301718v",
language = "English",
volume = "6",
pages = "6284--6292",
journal = "A C S Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "7",

}

RIS

TY - JOUR

T1 - Promotion of Phenol Photodecomposition over TiO2 Using Au, Pd, and AuPd Nanoparticles

AU - Su, Ren

AU - Tiruvalam, Ramchandra

AU - He, Qian

AU - Dimitratos, Nikolaos

AU - Kesavan, Lokesh

AU - Hammond, Ceri

AU - Antonio Lopez-Sanchez, Jose

AU - Bechstein, Ralf

AU - Kiely, Christopher

AU - Hutchings, Graham

AU - Besenbacher, Flemming

PY - 2012/6/4

Y1 - 2012/6/4

N2 - Noble metal nanoparticles (Au, Pd, AuPd alloys) with a narrow size distribution supported on nanocrystalline TiO2 (M/TiO2) have been synthesized via a sol-immobilization route. The effect of metal identity and size on the photocatalytic performance of M/TiO2 has been systematically investigated using phenol as a probe molecule. A different phenol degradation pathway was observed when using M/TiO2 catalysts as compared to pristine TiO2.We propose a mechanism to illustrate how the noble metal nanoparticles enhance the efficiency of phenol decomposition based on photoreduction of p-benzoquinone under anaerobic conditions. Our results suggest that the metal nanoparticles not only play a role in capturing photogenerated electrons, but are strongly involved in the photocatalytic reaction mechanism. The analysis of the reaction intermediates allows us to conclude that on M/TiO2 undesired redox reactions that consume photogenerated radicals are effectively suppressed. The analysis of the final products shows that the reusability performance of the catalyst is largely dependent on the pretreatment of the catalyst and the identity of the metal nanoparticle. Interestingly, the as-prepared Pd and AuPd decorated TiO2 materials exhibit excellent long-term photoactivity, in which ∼90% of the phenol can be fully decomposed to CO2 in each cycle.

AB - Noble metal nanoparticles (Au, Pd, AuPd alloys) with a narrow size distribution supported on nanocrystalline TiO2 (M/TiO2) have been synthesized via a sol-immobilization route. The effect of metal identity and size on the photocatalytic performance of M/TiO2 has been systematically investigated using phenol as a probe molecule. A different phenol degradation pathway was observed when using M/TiO2 catalysts as compared to pristine TiO2.We propose a mechanism to illustrate how the noble metal nanoparticles enhance the efficiency of phenol decomposition based on photoreduction of p-benzoquinone under anaerobic conditions. Our results suggest that the metal nanoparticles not only play a role in capturing photogenerated electrons, but are strongly involved in the photocatalytic reaction mechanism. The analysis of the reaction intermediates allows us to conclude that on M/TiO2 undesired redox reactions that consume photogenerated radicals are effectively suppressed. The analysis of the final products shows that the reusability performance of the catalyst is largely dependent on the pretreatment of the catalyst and the identity of the metal nanoparticle. Interestingly, the as-prepared Pd and AuPd decorated TiO2 materials exhibit excellent long-term photoactivity, in which ∼90% of the phenol can be fully decomposed to CO2 in each cycle.

KW - photocatalysis

KW - TiO2

KW - Au

KW - Pd

KW - AuPd alloys

KW - phenol decomposition mechanism

KW - reusability

KW - CO2 conversion

U2 - 10.1021/nn301718v

DO - 10.1021/nn301718v

M3 - Journal article

C2 - 22663086

VL - 6

SP - 6284

EP - 6292

JO - A C S Nano

JF - A C S Nano

SN - 1936-0851

IS - 7

ER -