Au nanoparticle decoration of nanoparticular and nanotubular TiO2 using atmospheric pressure cold plasma for photocatalytic applications

被引:0
作者
Bjelajac, Andjelika [1 ]
Petrovic, Rada [2 ]
Stefanovic, Milica [3 ]
Phillipe, Adrian-Marie [1 ]
Fleming, Yves [1 ]
Guillot, Jerome [1 ]
Chemin, Jean-Baptiste [1 ]
Choquet, Patrick [1 ]
Kadok, Joris [1 ]
Bulou, Simon [1 ]
机构
[1] Luxembourg Inst Sci & Technol, 28,Ave Des Hauts Fourneaux, L-4365 Esch Sur Alzette, Luxembourg
[2] Univ Belgrade, Fac Technol & Met, Karnegijeva 4, Belgrade 11000, Serbia
[3] Univ Belgrade, Innovat Ctr Fac Technol & Met, Fac Technol & Met, Karnegijeva 4, Belgrade 11000, Serbia
关键词
PHOTOGENERATED ELECTRONS; HYDROGEN-PRODUCTION; SIZE; AU/TIO2; DEGRADATION; REDUCTION; FILMS; UV;
D O I
10.1039/d4cy00345d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Herein, we present the effectiveness of using an atmospheric pressure dielectric barrier discharge (DBD) plasma torch for gold (Au) nanoparticle (NP) decoration of TiO2 nanoparticles and nanotubes (NTs). Au NPs were synthesised using an aerosol of HAuCl4<middle dot>3H(2)O solution that was carried with an inert gas to the near plasma post-discharge zone. Careful optimisation of the deposition parameters was done to ensure the uniform and dispersed decoration of TiO2, demonstrated by scanning and transmission electron microscopy with energy dispersive spectroscopy. The X-ray diffraction was used to confirm that the deposit was pure metallic Au. Unlike the bare TiO2 nanoparticles, the samples with Au NPs showed the plasmon resonance peak in the region of 500-600 nm. The photocatalytic property enhancement of Au NP decorated TiO2 structures was demonstrated: The TiO2 NPs@Au nanoparticular powder showed improved photocatalytic activity by enabling methyl orange dye degradation 35% faster than that of the pristine TiO2 NPs; superior photocatalytic behaviour of TiO2 NTs@Au thin films compared to bare TiO2 NTs was observed in the photodegradation of stearic acid. In situ formation and direct decoration of Au NPs on TiO2 using an atmospheric pressure DBD plasma torch at low temperature.
引用
收藏
页码:5342 / 5351
页数:10
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