Influence of Phases Content on Pt/TiO2, Pd/TiO2 Catalysts for Degradation of 4-Chlorophenol at Room Temperature

D. S. García-Zaleta, A. M. Torres-Huerta, M. A. Domínguez-Crespo, A. García-Murillo, R. Silva-Rodrigo, R. López González

Research output: Contribution to journalArticle

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Abstract

© 2016 D. S. García-Zaleta et al. Different Pt/TiO 2 and Pd/TiO 2 catalysts were prepared by sol-gel method. The influence of different amounts of noble metals (1-5 mol-%) present on the microstructure as well as the photocatalytic property under 4-chlorophenol degradation was evaluated. The anatase phase was favored at low Pt content; however, the apparition of new phases after 3 mol-% (PtO) suggests a saturation lattice considering our solubility limit at 1 mol-%. Similar trend was observed when Pd was added to the TiO 2 lattice. The as-prepared catalysts were deeply characterized by X-ray diffraction (XRD) with the Rietveld Method, Raman spectroscopy, high resolution scanning electron microscopy (HRSEM), scanning transmission electron microscopy (STEM), Brunauer-Emmett-Teller (BET) adsorption analysis, and X-Ray photoelectron spectroscopy (XPS). Unit-cell parameter of TiO 2 phases varied from 30 to 93 vol-% depending on the amount of Pt or Pd added to the composite. HRTEM and HRSEM identified the phases in the catalysts and confirmed the nanometric size and morphology of the catalysts. An improvement in removal efficiency of 4-chlorophenol was obtained in all the specimens compared with the commercial Degussa P25, which can be explained in terms of phase composition and modification of the band gap.
Original languageAmerican English
JournalJournal of Nanomaterials
DOIs
StatePublished - 1 Jan 2016

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Degradation
Catalysts
High resolution electron microscopy
Scanning electron microscopy
Rietveld method
Saturation (materials composition)
Temperature
Precious metals
Phase composition
Titanium dioxide
Sol-gel process
Raman spectroscopy
Energy gap
X ray photoelectron spectroscopy
Solubility
Transmission electron microscopy
Adsorption
X ray diffraction
Microstructure
4-chlorophenol

Cite this

@article{78b90dbd51f34b97b400c5186b90ac81,
title = "Influence of Phases Content on Pt/TiO2, Pd/TiO2 Catalysts for Degradation of 4-Chlorophenol at Room Temperature",
abstract = "{\circledC} 2016 D. S. Garc{\'i}a-Zaleta et al. Different Pt/TiO 2 and Pd/TiO 2 catalysts were prepared by sol-gel method. The influence of different amounts of noble metals (1-5 mol-{\%}) present on the microstructure as well as the photocatalytic property under 4-chlorophenol degradation was evaluated. The anatase phase was favored at low Pt content; however, the apparition of new phases after 3 mol-{\%} (PtO) suggests a saturation lattice considering our solubility limit at 1 mol-{\%}. Similar trend was observed when Pd was added to the TiO 2 lattice. The as-prepared catalysts were deeply characterized by X-ray diffraction (XRD) with the Rietveld Method, Raman spectroscopy, high resolution scanning electron microscopy (HRSEM), scanning transmission electron microscopy (STEM), Brunauer-Emmett-Teller (BET) adsorption analysis, and X-Ray photoelectron spectroscopy (XPS). Unit-cell parameter of TiO 2 phases varied from 30 to 93 vol-{\%} depending on the amount of Pt or Pd added to the composite. HRTEM and HRSEM identified the phases in the catalysts and confirmed the nanometric size and morphology of the catalysts. An improvement in removal efficiency of 4-chlorophenol was obtained in all the specimens compared with the commercial Degussa P25, which can be explained in terms of phase composition and modification of the band gap.",
author = "Garc{\'i}a-Zaleta, {D. S.} and Torres-Huerta, {A. M.} and Dom{\'i}nguez-Crespo, {M. A.} and A. Garc{\'i}a-Murillo and R. Silva-Rodrigo and Gonz{\'a}lez, {R. L{\'o}pez}",
year = "2016",
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language = "American English",
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}

Influence of Phases Content on Pt/TiO2, Pd/TiO2 Catalysts for Degradation of 4-Chlorophenol at Room Temperature. / García-Zaleta, D. S.; Torres-Huerta, A. M.; Domínguez-Crespo, M. A.; García-Murillo, A.; Silva-Rodrigo, R.; González, R. López.

In: Journal of Nanomaterials, 01.01.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of Phases Content on Pt/TiO2, Pd/TiO2 Catalysts for Degradation of 4-Chlorophenol at Room Temperature

AU - García-Zaleta, D. S.

AU - Torres-Huerta, A. M.

AU - Domínguez-Crespo, M. A.

AU - García-Murillo, A.

AU - Silva-Rodrigo, R.

AU - González, R. López

PY - 2016/1/1

Y1 - 2016/1/1

N2 - © 2016 D. S. García-Zaleta et al. Different Pt/TiO 2 and Pd/TiO 2 catalysts were prepared by sol-gel method. The influence of different amounts of noble metals (1-5 mol-%) present on the microstructure as well as the photocatalytic property under 4-chlorophenol degradation was evaluated. The anatase phase was favored at low Pt content; however, the apparition of new phases after 3 mol-% (PtO) suggests a saturation lattice considering our solubility limit at 1 mol-%. Similar trend was observed when Pd was added to the TiO 2 lattice. The as-prepared catalysts were deeply characterized by X-ray diffraction (XRD) with the Rietveld Method, Raman spectroscopy, high resolution scanning electron microscopy (HRSEM), scanning transmission electron microscopy (STEM), Brunauer-Emmett-Teller (BET) adsorption analysis, and X-Ray photoelectron spectroscopy (XPS). Unit-cell parameter of TiO 2 phases varied from 30 to 93 vol-% depending on the amount of Pt or Pd added to the composite. HRTEM and HRSEM identified the phases in the catalysts and confirmed the nanometric size and morphology of the catalysts. An improvement in removal efficiency of 4-chlorophenol was obtained in all the specimens compared with the commercial Degussa P25, which can be explained in terms of phase composition and modification of the band gap.

AB - © 2016 D. S. García-Zaleta et al. Different Pt/TiO 2 and Pd/TiO 2 catalysts were prepared by sol-gel method. The influence of different amounts of noble metals (1-5 mol-%) present on the microstructure as well as the photocatalytic property under 4-chlorophenol degradation was evaluated. The anatase phase was favored at low Pt content; however, the apparition of new phases after 3 mol-% (PtO) suggests a saturation lattice considering our solubility limit at 1 mol-%. Similar trend was observed when Pd was added to the TiO 2 lattice. The as-prepared catalysts were deeply characterized by X-ray diffraction (XRD) with the Rietveld Method, Raman spectroscopy, high resolution scanning electron microscopy (HRSEM), scanning transmission electron microscopy (STEM), Brunauer-Emmett-Teller (BET) adsorption analysis, and X-Ray photoelectron spectroscopy (XPS). Unit-cell parameter of TiO 2 phases varied from 30 to 93 vol-% depending on the amount of Pt or Pd added to the composite. HRTEM and HRSEM identified the phases in the catalysts and confirmed the nanometric size and morphology of the catalysts. An improvement in removal efficiency of 4-chlorophenol was obtained in all the specimens compared with the commercial Degussa P25, which can be explained in terms of phase composition and modification of the band gap.

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