Platinum nanoparticles confined within TiO2 nanotube matrix for enhanced catalytic reduction of azure b dye

Krishnamoorthy Shanmugaraj; Ramalinga Viswanathan Mangalaraja; Cristian H. Campos; Dinesh Pratap Singh; R. Udayabhaskar; Santiago Bedoya; Radhamanohar Aepuru

doi:10.1016/j.matlet.2022.133208

Platinum nanoparticles confined within TiO₂ nanotube matrix for enhanced catalytic reduction of azure b dye

Krishnamoorthy Shanmugaraj, Ramalinga Viswanathan Mangalaraja, Cristian H. Campos, Dinesh Pratap Singh, R. Udayabhaskar, Santiago Bedoya, Radhamanohar Aepuru

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

1 Scopus citations

Abstract

In this work, we report the synthesis of TiO₂ nanotubes encapsulated platinum nanoparticles (PtNPs-TiO₂NTs) as a highly efficient catalyst for the catalytic reduction of azure B (AZB) dye in the sodium borohydride (NaBH₄) medium. The encapsulation of PtNPs (particle size ∼ 2–3 nm) inside the TiO₂NTs was confirmed by HR-TEM analysis. The as-prepared PtNPs-TiO₂NTs exhibit higher conversion efficiency than 99 % with a pseudo-first order rate constant of 2.6 × 10^-3 s⁻¹. Owing to the confinement effect of PtNPs inside the TiO₂NTs, the synthesized catalyst shows the superior operative stability even after 8 consecutive recycles without any loss in its activity. This work opens up new avenue for the designing of confined catalyst for various industrial catalytic reactions.

Original language	English
Article number	133208
Journal	Materials Letters
Volume	330
DOIs	https://doi.org/10.1016/j.matlet.2022.133208
State	Published - 1 Jan 2023
Externally published	Yes

Keywords

Azure B
Catalytic reduction
Pseudo-first order reaction
PtNPs-TiONTs

Access to Document

10.1016/j.matlet.2022.133208

Cite this

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title = "Platinum nanoparticles confined within TiO2 nanotube matrix for enhanced catalytic reduction of azure b dye",

abstract = "In this work, we report the synthesis of TiO2 nanotubes encapsulated platinum nanoparticles (PtNPs-TiO2NTs) as a highly efficient catalyst for the catalytic reduction of azure B (AZB) dye in the sodium borohydride (NaBH4) medium. The encapsulation of PtNPs (particle size ∼ 2–3 nm) inside the TiO2NTs was confirmed by HR-TEM analysis. The as-prepared PtNPs-TiO2NTs exhibit higher conversion efficiency than 99 % with a pseudo-first order rate constant of 2.6 × 10-3 s−1. Owing to the confinement effect of PtNPs inside the TiO2NTs, the synthesized catalyst shows the superior operative stability even after 8 consecutive recycles without any loss in its activity. This work opens up new avenue for the designing of confined catalyst for various industrial catalytic reactions.",

keywords = "Azure B, Catalytic reduction, Pseudo-first order reaction, PtNPs-TiONTs",

author = "Krishnamoorthy Shanmugaraj and {Viswanathan Mangalaraja}, Ramalinga and Campos, {Cristian H.} and {Pratap Singh}, Dinesh and R. Udayabhaskar and Santiago Bedoya and Radhamanohar Aepuru",

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doi = "10.1016/j.matlet.2022.133208",

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T1 - Platinum nanoparticles confined within TiO2 nanotube matrix for enhanced catalytic reduction of azure b dye

AU - Shanmugaraj, Krishnamoorthy

AU - Viswanathan Mangalaraja, Ramalinga

AU - Campos, Cristian H.

AU - Pratap Singh, Dinesh

AU - Udayabhaskar, R.

AU - Bedoya, Santiago

AU - Aepuru, Radhamanohar

PY - 2023/1/1

Y1 - 2023/1/1

N2 - In this work, we report the synthesis of TiO2 nanotubes encapsulated platinum nanoparticles (PtNPs-TiO2NTs) as a highly efficient catalyst for the catalytic reduction of azure B (AZB) dye in the sodium borohydride (NaBH4) medium. The encapsulation of PtNPs (particle size ∼ 2–3 nm) inside the TiO2NTs was confirmed by HR-TEM analysis. The as-prepared PtNPs-TiO2NTs exhibit higher conversion efficiency than 99 % with a pseudo-first order rate constant of 2.6 × 10-3 s−1. Owing to the confinement effect of PtNPs inside the TiO2NTs, the synthesized catalyst shows the superior operative stability even after 8 consecutive recycles without any loss in its activity. This work opens up new avenue for the designing of confined catalyst for various industrial catalytic reactions.

AB - In this work, we report the synthesis of TiO2 nanotubes encapsulated platinum nanoparticles (PtNPs-TiO2NTs) as a highly efficient catalyst for the catalytic reduction of azure B (AZB) dye in the sodium borohydride (NaBH4) medium. The encapsulation of PtNPs (particle size ∼ 2–3 nm) inside the TiO2NTs was confirmed by HR-TEM analysis. The as-prepared PtNPs-TiO2NTs exhibit higher conversion efficiency than 99 % with a pseudo-first order rate constant of 2.6 × 10-3 s−1. Owing to the confinement effect of PtNPs inside the TiO2NTs, the synthesized catalyst shows the superior operative stability even after 8 consecutive recycles without any loss in its activity. This work opens up new avenue for the designing of confined catalyst for various industrial catalytic reactions.

KW - Azure B

KW - Catalytic reduction

KW - Pseudo-first order reaction

KW - PtNPs-TiONTs

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