Visible light active Ru-doped sodium niobate pervoskite decorated with platinum nanoparticles via surface capping

Blain Paul; Kwang Ho Choo

doi:10.1016/j.cattod.2013.11.020

Visible light active Ru-doped sodium niobate pervoskite decorated with platinum nanoparticles via surface capping

Blain Paul, Kwang Ho Choo

Department of Environmental Engineering

Kyungpook National University

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

20 Scopus citations

Abstract

An efficient visible light active NaNb_1-xRu_xO ₃ perovskite was hydrothermally fabricated and characterized. Various amounts of ruthenium substitution (0-5%) for Nb⁵⁺ in the niobate framework caused structural evolution from nanocubes to nanowires. 1% Ru-doped niobates [NR(1)], which had a highly crystalline orthorhombic structure, adsorbed visible light most substantially with an optical band gap of ∼2.3 eV. With the aid of ¹H MAS NMR examination, the addition of protons into the niobate by acid treatment was convinced and its projected structure of [RuO₆] plus [NbO₆] octahedra with some defects was proposed. NR(1) itself was not effective at carrying out photocatalytic decomposition of phenol in water. To enhance visible light driven charge separation, platinum was dispersed onto NR(1) using surface capped Pt nanoparticles (PtNP) and Pt complexes (e.g., [Pt(NH₃) ₄]Cl₂). PtNPs laden NR(1) exhibited superior photocatalytic degradation of phenol in water. This increased photocatalytic activity was attributable to synergistic effects of facilitated electron transfer by PtNPs.

Original language	English
Pages (from-to)	138-144
Number of pages	7
Journal	Catalysis Today
Volume	230
DOIs	https://doi.org/10.1016/j.cattod.2013.11.020
State	Published - Jul 2014

Keywords

Charge separation
Octahedral framework
Photocatalysis
Platinum nanoparticle
Ru-doped niobate

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title = "Visible light active Ru-doped sodium niobate pervoskite decorated with platinum nanoparticles via surface capping",

abstract = "An efficient visible light active NaNb1-xRuxO 3 perovskite was hydrothermally fabricated and characterized. Various amounts of ruthenium substitution (0-5%) for Nb5+ in the niobate framework caused structural evolution from nanocubes to nanowires. 1% Ru-doped niobates [NR(1)], which had a highly crystalline orthorhombic structure, adsorbed visible light most substantially with an optical band gap of ∼2.3 eV. With the aid of 1H MAS NMR examination, the addition of protons into the niobate by acid treatment was convinced and its projected structure of [RuO6] plus [NbO6] octahedra with some defects was proposed. NR(1) itself was not effective at carrying out photocatalytic decomposition of phenol in water. To enhance visible light driven charge separation, platinum was dispersed onto NR(1) using surface capped Pt nanoparticles (PtNP) and Pt complexes (e.g., [Pt(NH3) 4]Cl2). PtNPs laden NR(1) exhibited superior photocatalytic degradation of phenol in water. This increased photocatalytic activity was attributable to synergistic effects of facilitated electron transfer by PtNPs.",

keywords = "Charge separation, Octahedral framework, Photocatalysis, Platinum nanoparticle, Ru-doped niobate",

author = "Blain Paul and Choo, {Kwang Ho}",

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doi = "10.1016/j.cattod.2013.11.020",

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AU - Choo, Kwang Ho

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N2 - An efficient visible light active NaNb1-xRuxO 3 perovskite was hydrothermally fabricated and characterized. Various amounts of ruthenium substitution (0-5%) for Nb5+ in the niobate framework caused structural evolution from nanocubes to nanowires. 1% Ru-doped niobates [NR(1)], which had a highly crystalline orthorhombic structure, adsorbed visible light most substantially with an optical band gap of ∼2.3 eV. With the aid of 1H MAS NMR examination, the addition of protons into the niobate by acid treatment was convinced and its projected structure of [RuO6] plus [NbO6] octahedra with some defects was proposed. NR(1) itself was not effective at carrying out photocatalytic decomposition of phenol in water. To enhance visible light driven charge separation, platinum was dispersed onto NR(1) using surface capped Pt nanoparticles (PtNP) and Pt complexes (e.g., [Pt(NH3) 4]Cl2). PtNPs laden NR(1) exhibited superior photocatalytic degradation of phenol in water. This increased photocatalytic activity was attributable to synergistic effects of facilitated electron transfer by PtNPs.

AB - An efficient visible light active NaNb1-xRuxO 3 perovskite was hydrothermally fabricated and characterized. Various amounts of ruthenium substitution (0-5%) for Nb5+ in the niobate framework caused structural evolution from nanocubes to nanowires. 1% Ru-doped niobates [NR(1)], which had a highly crystalline orthorhombic structure, adsorbed visible light most substantially with an optical band gap of ∼2.3 eV. With the aid of 1H MAS NMR examination, the addition of protons into the niobate by acid treatment was convinced and its projected structure of [RuO6] plus [NbO6] octahedra with some defects was proposed. NR(1) itself was not effective at carrying out photocatalytic decomposition of phenol in water. To enhance visible light driven charge separation, platinum was dispersed onto NR(1) using surface capped Pt nanoparticles (PtNP) and Pt complexes (e.g., [Pt(NH3) 4]Cl2). PtNPs laden NR(1) exhibited superior photocatalytic degradation of phenol in water. This increased photocatalytic activity was attributable to synergistic effects of facilitated electron transfer by PtNPs.

KW - Charge separation

KW - Octahedral framework

KW - Photocatalysis

KW - Platinum nanoparticle

KW - Ru-doped niobate

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ER -

Visible light active Ru-doped sodium niobate pervoskite decorated with platinum nanoparticles via surface capping

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Keywords

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