Bimetallic Cu5Zn8 alloy-embedded hollow porous carbon nanocubes derived from 3D-Cu/ZIF-8 as efficient electrocatalysts for environmental pollutant detection in water bodies

• Published in: Environmental research Vol. 216; no. Pt 2; p. 114609
• Main Authors: Sakthivel, Rajalakshmi, Liu, Ting-Yu, Chung, Ren-Jei
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.01.2023
• Subjects: 3D-Cu/ZIF-8; Bimetallic Cu5Zn8 alloy; carbon; cost effectiveness; detection limit; ecosystems; electrical conductivity; electrochemistry; electrodes; electron transfer; Environmental pollutant; Hollow porous carbon nanocubes; imidazole; nanomaterials; Nitrofurantoin; pollutants; river water; spectroscopy; storage quality; tap water; voltammetry; Water bodies; Water bodies; 3D-Cu/ZIF-8; Hollow porous carbon nanocubes; Environmental pollutant; Nitrofurantoin; Bimetallic Cu5Zn8 alloy
• ISSN: 0013-9351; 1096-0953; 1096-0953
• DOI: 10.1016/j.envres.2022.114609

Excessive use of nitrofurantoin (NFT) and its residues can be harmful to the ecosystem, and to mitigate this, rapid and cost-effective detection of NFT in water bodies is needed. In this regard, we prepared a three-dimensional (3D) copper-zeolitic imidazole framework (Cu/ZIF-8)-derived bimetallic Cu5Zn8 alloy-embedded hollow porous carbon nanocubes (Cu5Zn8/HPCNC) for electrochemical detection of NFT. The resultant material is characterized using suitable spectrophotometry and voltammetry methods. Cu5Zn8/HPCNC is an effective electrocatalyst with high electrical conductivity and a fast electron transfer rate. It also has more catalytic active sites for improved electrochemical reduction of NFT. Fabricated Cu5Zn8/HPCNC-modified screen-printed electrode (SPE) for NFT reduction have a wide linear range with a low detection limit, and high sensitivity (15.343 μA μМ–1 cm–2), appreciable anti-interference ability with related nitro compounds, storage stability, reproducibility, and repeatability. Also, the practicability of Cu5Zn8/HPCNC/SPE can be successfully employed in NFT monitoring in water bodies (drinking water, pond water, river water, and tap water) with satisfactory recoveries. •3D-Cu/ZIF-8 derived bimetallic Cu5Zn8/hollow porous carbon nanocubes were prepared.•The synthesis technique is very simple, cost-effective, and eco-friendly.•The synergistic effect of Cu and Zn enhances the sensing performance of Cu5Zn8/HPCNC.•Broad linear range, low LOD, and high sensitivity were achieved for NFT detection.•The feasibility of Cu5Zn8/HPCNC/SPE was demonstrated in water bodies.