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Open AccessArticle

Improved Catalytic Durability of Pt-Particle/ABS for H2O2 Decomposition in Contact Lens Cleaning

1
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
2
Menicon Co., Ltd., Kasugai, Aichi 487-0032, Japan
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(3), 342; https://doi.org/10.3390/nano9030342
Received: 29 January 2019 / Revised: 12 February 2019 / Accepted: 18 February 2019 / Published: 3 March 2019
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Nanoparticles)
In a previous study, Pt nanoparticles were supported on a substrate of acrylonitrile–butadiene–styrene copolymer (ABS) to give the ABS surface catalytic activity for H2O2 decomposition during contact lens cleaning. Although the Pt-particle/ABS catalysts exhibited considerably high specific catalytic activity for H2O2 decomposition, the catalytic activity decreased with increasing numbers of repeated usage, which meant the durability of the catalytic activity was low. Therefore, to improve the catalytic durability in this study, we proposed two types of pretreatments, as well as a combination of these treatments before supporting Pt nanoparticles on the ABS substrate. In the first method, the ABS substrate was etched, and in the second method, the surface charge of the ABS substrate was controlled. A combination of etching and surface charge control was also applied as a third method. The effects of these pretreatments on the surface morphology, surface chemical composition, deposition behavior of Pt particles, and Pt loading weight were investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), cross-sectional SEM, and inductively coupled plasma atomic emission spectroscopy (ICP-AES), respectively. Both etching and controlling the surface charge effectively improved the catalytic durability for H2O2 decomposition. In addition, the combination treatment was the most effective. View Full-Text
Keywords: catalytic durability; nanoparticle; supported catalyst; radical reactions; platinum (Pt); H2O2 decomposition; contact lens cleaning catalytic durability; nanoparticle; supported catalyst; radical reactions; platinum (Pt); H2O2 decomposition; contact lens cleaning
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MDPI and ACS Style

Ohkubo, Y.; Aoki, T.; Seino, S.; Mori, O.; Ito, I.; Endo, K.; Yamamura, K. Improved Catalytic Durability of Pt-Particle/ABS for H2O2 Decomposition in Contact Lens Cleaning. Nanomaterials 2019, 9, 342.

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