Constructing Multi-Interfaced and Vacancy-Rich Cu_1.8S/rGO/Oleylamine Composites Toward Anti-Biofouling Microwave...

Area of Science:

• Materials Science
• Nanotechnology
• Marine Engineering

Background:

• Marine applications of microwave absorption materials (MAMs) require robust anti-biofouling properties for sustained performance.
• Traditional MAMs often overlook anti-biofouling characteristics, prioritizing only microwave absorption (MA).

Purpose of the Study:

• To develop a novel ternary composite integrating strong microwave absorption with effective anti-biofouling properties.
• To investigate the synergistic effects of copper sulfide nanoparticles, reduced graphene oxide, and oleylamine for enhanced functionality.

Main Methods:

• A one-pot solution-phase thermal decomposition method was employed to synthesize the Cu1.8S/reduced graphene oxide/oleylamine (Cu1.8S/rGO/OLAM) composite.
• Characterization of material properties and evaluation of microwave absorption and anti-biofouling performance.

Main Results:

• The Cu1.8S/rGO/OLAM composite exhibited a minimum reflection loss of -56.2 dB and an effective absorption bandwidth of 9.68 GHz.
• The composite demonstrated significant anti-biofouling capabilities, with bacterial and algal survival rates as low as 4% and 35%, respectively.
• Copper vacancy defects in Cu1.8S and oleylamine layers contributed to dipole and interfacial polarization, while copper ions offered biocidal effects.

Conclusions:

• The developed Cu1.8S/rGO/OLAM composite successfully integrates excellent microwave absorption with outstanding anti-biofouling performance.
• This material offers a promising solution for durable and stable microwave absorption in demanding marine environments.