Strong Biomimetic Immobilization of Pt-Particle Catalyst on ABS Substrate Using Polydopamine and Its Application for Contact-Lens Cleaning with H2O2

Abstract

Polydopamine (PDA)—a known adhesive coating material—was used herein to strongly immobilize a Pt-particle catalyst on an acrylonitrile–butadiene–styrene copolymer (ABS) substrate. Previous studies have shown that the poor adhesion between Pt particles and ABS surfaces is a considerable problem, leading to low catalytic durability for H2O2 decomposition during contact-lens cleaning. First, the ABS substrate was coated with PDA, and the PDA film was evaluated by X-ray photoelectron spectroscopy. Second, Pt particles were immobilized on the PDA-coated ABS substrate (ABS-PDA) using the electron-beam irradiation reduction method. The Pt particles immobilized on ABS-PDA (Pt/ABS-PDA) were observed using a scanning electron microscope. The Pt-loading weight was measured by inductively coupled plasma atomic emission spectroscopy. Third, the catalytic activity of the Pt/ABS-PDA was evaluated as the residual H2O2 concentration after immersing it in a 35,000-ppm H2O2 solution (the target value was less than 100 ppm). The catalytic durability was evaluated as the residual H2O2 concentration after repeated use. The PDA coating drastically improved both the catalytic activity and durability because of the high Pt-loading weight and strong adhesion among Pt particles, PDA, and the ABS substrate. Plasma treatment prior to PDA coating further improved the catalytic durability.

Surfactant- and Ligand-Free Synthesis of Platinum Nanoparticles in Aqueous Solution for Catalytic Applications

“…Our catalysts achieve close to that rate at pH 7, and even higher rates at pH 10. All other Pt-catalyzed rates reported in the literature, except those by Ohkubo et al [55][56][57], are at least an order of magnitude less than our value at pH 7 of around 298K.…”

“…A detailed comparison of the decomposition rates for various sizes of nanoparticles is included in Table S1. The most active Pt nanoparticles that we found in the literature are supported on to acrylonitrile-butadiene-styrene (ABS) polymer and coated with PDA (polydopamine) polymer, where, at pH 7, they achieved a rate constant of 2.48 min −1 (mg Pt) −1 [55].…”

Hydrogel‐based composites: Unlimited platforms for biosensors and diagnostics

“…[ 211 ] The emission of luminol can be enhanced by reactive radicals such as •OH and O 2 • – , [ 113,211 ] which are usually generated by H 2 O 2 decomposition under the catalytic effect of enzymes or catalysts such as HRP [ 215–217 ] and PtNPs. [ 218,219 ] For example, an ECL sensor based on Au star/bovine serum albumin (BSA)/luminol nanocomposites and PANI hydrogel decorated with PtNPs was developed for detection of human chorionic gonadotropin (HCG) (Figure 6E). [ 211 ] The specific HCG antibodies (Ab1) were loaded on PANI/PtNPs, and HCG detection antibodies (Ab2) and luminol were loaded onto the Au star/BSA nanocomposites to form a luminol/Au star/BSA/Ab2 complex.…”

Mussel-Inspired Electro-oxidation-Modified Three-Dimensional Printed Carriers for a Versatile Enzyme Immobilization Approach

“…Additive manufacturing, commonly known as 3D printing technology, is a manufacturing technology that integrates computer design, material processing, and molding technologies; this technology creates solid objects by stacking corresponding organic, inorganic, or metallic materials layer by layer through extrusion, sintering, melting, light curing, and spraying. − In our previous studies, enzyme immobilization carriers printed by fused deposition modeling were more adaptable and variable than conventional carriers, permitting them to be designed as needed . Acrylonitrile butadiene styrene (ABS), the raw material for the printed carrier, is among the main materials utilized in 3D printing as ABS exhibits heat resistance, impact resistance, and chemical resistance and generates a product with dimensional stability. , These features guarantee the stability of the enzyme immobilization carrier in the practical catalytic process. Remarkably, ABS materials for enzyme immobilization still face several problems, including low loading efficiency and poor catalytic performance in practice.…”