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Multifunctional CNT-decorated cobalt Iron nanocomposite for efficient photocatalytic dye degradation coupled with potent antibacterial and anticancer activity
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DOI：10.1016/j.diamond.2026.114030.png)
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Abstract
En 中文
Organic dye pollution, rapidly spreading drug-resistant bacteria, and rising colon cancer incidence are major global health threats. Materials capable of addressing all three challenges simultaneously remain rare. We synthesized a multiwalled carbon nanotube‑cobalt‑iron (CNT–Co-Fe) nanocomposite using Murraya koenigii (MK-curry leaf) extract. Two CNT loadings (2.5 wt% and 5 wt%) were prepared, along with pristine CoFe nanoparticles. Under visible light, the 5 wt% CNT-Co-Fe degraded methylene blue (MB) achieving 99% degradation in 60 min, with a rate constant of 0.052 min−1 which is 2.6 times faster than that of pristine CoFe. The same composite (5 wt% CNT–Co-Fe) fully inhibited enteropathogenic E. coli (EPEC) growth (no colonies recovered; >99.99%, kill at 100 μg/mL) and decreased HCT 116 colon cancer cell viability dose-dependently. The superior performance of the 5 wt% composite is attributed to CNT-mediated electron extraction from CoFe, which suppresses charge recombination and enhances radical generation. This trifunctional, green-synthesized CNT–Co-Fe nanocomposite offers a promising single-material platform for water treatment, antibacterial therapy, and anticancer applications.
Keywords:
Green synthesis
CNT-Co-Fe nanocomposite
Multifunctional nanocomposite
Photocatalysis
Antibacterial activity
MTT assay
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