Mohanty Abhinandan, Upadhye Shubham, Pradhan Gopal K, Nayak Pranati
Department of Chemical Engineering, Institute of Chemical Technology - Indian Oil Odisha Campus, Bhubaneswar, Odisha 751013, India.
Department of Engineering and Materials Physics, Institute of Chemical Technology-Indian Oil Odisha Campus, Bhubaneswar 751013, India.
J Mater Chem B. 2025 Jun 25;13(25):7393-7400. doi: 10.1039/d5tb00041f.
Arsenic contamination in water poses a serious health risk due to its high toxicity, even at ppb levels. In this work, we report a cost-effective graphene-based sensor with ultralow detection capabilities for arsenic. This is achieved by enhancing the catalytic efficiency of graphene electrodes through sunlight-assisted photothermal oxidation of a metal salt into metal oxide nanoparticles. The sensor demonstrated high sensitivity (34.81 ± 1.74 μA cm ppb) and an ultralow detection limit (LOD 0.0636 ppb). Field tests on water samples from arsenic-contaminated zones in West Bengal, India, showed results consistent with the state-of-the-art ICP-OES analysis, highlighting the sensor's potential for practical, on-site arsenic monitoring.
由于砷具有高毒性，即使在十亿分之一（ppb）的水平，水中的砷污染也会带来严重的健康风险。在这项工作中，我们报告了一种具有超低成本且对砷具有超低检测能力的基于石墨烯的传感器。这是通过阳光辅助光热氧化金属盐生成金属氧化物纳米颗粒来提高石墨烯电极的催化效率而实现的。该传感器表现出高灵敏度（34.81±1.74μA cm ppb）和超低检测限（检测限为0.0636 ppb）。对印度西孟加拉邦砷污染地区水样的现场测试结果与最先进的电感耦合等离子体发射光谱（ICP - OES）分析结果一致，突出了该传感器在实际现场砷监测方面的潜力。
