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  • One-Pot Decoration of Cupric Oxide on Activated Carbon Fibers Mediated by Polydopamine for Bacterial Growth Inhibition.

One-Pot Decoration of Cupric Oxide on Activated Carbon Fibers Mediated by Polydopamine for Bacterial Growth Inhibition.

Materials (Basel, Switzerland) (2020-03-11)
Hangil Moon, Young-Chul Lee, Jaehyun Hur
ABSTRACT

Despite the widespread application of activated carbon fiber (ACF) filters in air cleaning owing to their high surface area and low price, they have certain limitations in that they facilitate bacterial growth upon prolonged use as ACF filters can provide favorable conditions for bacterial survival. The deposition of cupric oxide (CuO) on ACFs can be an effective way of resolving this problem because CuO can inhibit the proliferation of bacteria owing to its antimicrobial properties. However, finding a new method that allows the simple and uniform coating of CuO on ACF filters is challenging. Here, we demonstrate one-pot CuO deposition mediated by polydopamine (PD) to realize an ACF filter with antimicrobial activity. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analyses reveal that CuO and PD are uniformly deposited on the ACF surface. The amount of CuO formed on the ACFs is measured by thermogravimetric analysis (TGA). Finally, the changes in surface area, pressure drop, and antimicrobial activity after coating PD-CuO on the ACFs are evaluated. The use of PD-CuO on the ACFs effectively suppresses the growth of bacteria and enhances the mechanical properties without significantly sacrificing the original characteristics of the ACF filter.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Phosphate buffered saline, tablet
Sigma-Aldrich
TWEEN® 20, for molecular biology, viscous liquid
Sigma-Aldrich
Dopamine hydrochloride
Sigma-Aldrich
Diethylenetriaminepentaacetic acid, for complexometry, ≥99.0%
Sigma-Aldrich
Sodium acetate, puriss. p.a., ACS reagent, reag. Ph. Eur., anhydrous
Sigma-Aldrich
Copper(II) sulfate pentahydrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99-102%