Self-assembling behaviour of Pt nanoparticles onto surface of TiO 2 and their resulting photocatalytic activity

M. Qamar; Ashok K. Ganguli

doi:10.1007/s12034-013-0556-y

Self-assembling behaviour of Pt nanoparticles onto surface of TiO ₂ and their resulting photocatalytic activity

M. Qamar
, Ashok K. Ganguli^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

In the present study, self-assembling behaviour of guest nanoparticles (platinum) onto the surface of host support (titanium dioxide) during photodeposition process as a function of solution pH has been explored in detail by means of transmission electron microscope (TEM). The photocatalytic activity of the resulting bimetallic nanoassembly (Pt/TiO₂) was evaluated by studying the degradation of two organic pollutants viz. triclopyr and methyl orange. Microscopic studies revealed that the deposition and/or distribution of Pt nanoparticles onto the surface of TiO₂ were strongly guided by the ionization state of support which in turn was regulated by the solution pH of photodeposition process. A direct relationship between the solution pH of deposition process and the photocatalytic activity of resulting bimetallic catalyst has been observed. A mechanism based on the interparticle interaction between TiO₂ and hydrolytic products of metal ions has been proposed for the differences in the photocatalytic activity of the resulting nanocomposite.

Original language	English
Pages (from-to)	945-951
Number of pages	7
Journal	Bulletin of Materials Science
Volume	36
Issue number	6
DOIs	https://doi.org/10.1007/s12034-013-0556-y
State	Published - Nov 2013
Externally published	Yes

Bibliographical note

Funding Information:
Financial support from the Department of Science and Technology (DST), Government of India, for the award of a Young Scientist to (MQ) (Project No. SR/FTP/CS/124/ 2006), and from the Department of Chemistry, IIT Delhi, is gratefully acknowledged. (AKG) thanks DST (NSTI) for HRTEM facility at IIT Delhi and CSIR, Government of India for financial assistance.

Keywords

Photocatalysis
Photocatalytic activity
Photodeposition
Sol-gel synthesis
TiO

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials

Access to Document

10.1007/s12034-013-0556-y

Cite this

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title = "Self-assembling behaviour of Pt nanoparticles onto surface of TiO 2 and their resulting photocatalytic activity",

abstract = "In the present study, self-assembling behaviour of guest nanoparticles (platinum) onto the surface of host support (titanium dioxide) during photodeposition process as a function of solution pH has been explored in detail by means of transmission electron microscope (TEM). The photocatalytic activity of the resulting bimetallic nanoassembly (Pt/TiO2) was evaluated by studying the degradation of two organic pollutants viz. triclopyr and methyl orange. Microscopic studies revealed that the deposition and/or distribution of Pt nanoparticles onto the surface of TiO2 were strongly guided by the ionization state of support which in turn was regulated by the solution pH of photodeposition process. A direct relationship between the solution pH of deposition process and the photocatalytic activity of resulting bimetallic catalyst has been observed. A mechanism based on the interparticle interaction between TiO2 and hydrolytic products of metal ions has been proposed for the differences in the photocatalytic activity of the resulting nanocomposite.",

keywords = "Photocatalysis, Photocatalytic activity, Photodeposition, Sol-gel synthesis, TiO",

author = "M. Qamar and Ganguli, \{Ashok K.\}",

note = "Funding Information: Financial support from the Department of Science and Technology (DST), Government of India, for the award of a Young Scientist to (MQ) (Project No. SR/FTP/CS/124/ 2006), and from the Department of Chemistry, IIT Delhi, is gratefully acknowledged. (AKG) thanks DST (NSTI) for HRTEM facility at IIT Delhi and CSIR, Government of India for financial assistance.",

year = "2013",

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doi = "10.1007/s12034-013-0556-y",

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AU - Ganguli, Ashok K.

N1 - Funding Information: Financial support from the Department of Science and Technology (DST), Government of India, for the award of a Young Scientist to (MQ) (Project No. SR/FTP/CS/124/ 2006), and from the Department of Chemistry, IIT Delhi, is gratefully acknowledged. (AKG) thanks DST (NSTI) for HRTEM facility at IIT Delhi and CSIR, Government of India for financial assistance.

PY - 2013/11

Y1 - 2013/11

N2 - In the present study, self-assembling behaviour of guest nanoparticles (platinum) onto the surface of host support (titanium dioxide) during photodeposition process as a function of solution pH has been explored in detail by means of transmission electron microscope (TEM). The photocatalytic activity of the resulting bimetallic nanoassembly (Pt/TiO2) was evaluated by studying the degradation of two organic pollutants viz. triclopyr and methyl orange. Microscopic studies revealed that the deposition and/or distribution of Pt nanoparticles onto the surface of TiO2 were strongly guided by the ionization state of support which in turn was regulated by the solution pH of photodeposition process. A direct relationship between the solution pH of deposition process and the photocatalytic activity of resulting bimetallic catalyst has been observed. A mechanism based on the interparticle interaction between TiO2 and hydrolytic products of metal ions has been proposed for the differences in the photocatalytic activity of the resulting nanocomposite.

AB - In the present study, self-assembling behaviour of guest nanoparticles (platinum) onto the surface of host support (titanium dioxide) during photodeposition process as a function of solution pH has been explored in detail by means of transmission electron microscope (TEM). The photocatalytic activity of the resulting bimetallic nanoassembly (Pt/TiO2) was evaluated by studying the degradation of two organic pollutants viz. triclopyr and methyl orange. Microscopic studies revealed that the deposition and/or distribution of Pt nanoparticles onto the surface of TiO2 were strongly guided by the ionization state of support which in turn was regulated by the solution pH of photodeposition process. A direct relationship between the solution pH of deposition process and the photocatalytic activity of resulting bimetallic catalyst has been observed. A mechanism based on the interparticle interaction between TiO2 and hydrolytic products of metal ions has been proposed for the differences in the photocatalytic activity of the resulting nanocomposite.

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