Browsing by Author "Wu, Jerry J."

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    Detection of Environmentally Harmful Malathion Pesticides Using a Bimetallic Oxide of CuO Nanoparticles Dispersed over a 3D ZnO Nanoflower
    (Multidisciplinary Digital Publishing Institute (MDPI), 2023-11-07) Gurusamy, Lakshmanan; Cheng, Ru-Wen; Anandan, Sambandam; Liu, Cheng-Hua; Wu, Jerry J.
    Super-sensitive malathion detection was achieved using a nonenzymatic electrochemical sensor based on a CuO/ZnO-modified glassy carbon electrode (GCE). Due to the high affinity between the Cu element and the sulfur groups in malathion, the developed CuO-ZnO/GCE sensor may bond malathion with ease, inhibiting the redox signal of the Cu element when malathion is present. In addition to significantly increasing the ability of electron transfer, the addition of 3D-flower-like ZnO enhances active sites of the sensor interface for the high affinity of malathion, giving the CuO-ZnO/GCE composite an exceptional level of sensitivity and selectivity. This enzyme-free CuO-ZnO/GCE malathion sensor demonstrates outstanding stability and excellent detection performance under optimal operating conditions with a wide linear range of malathion from 0 to 200 nM and a low detection limit of 1.367 nM. A promising alternative technique for organophosphorus pesticide (OP) determination is offered by the analytical performance of the proposed sensor, and this method can be quickly and sensitively applied to samples that have been contaminated with these pesticides. © 2023 by the authors.
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    Ni-MOF nanoflowers as photocatalyst for carbon-dioxide conversion to solar fuels
    (Elsevier B.V., 2025-08-22) Sundarraj, Nandha Kumar; Sundar, Dhivya; Souwaileh, Abdullah Al; Wu, Jerry J.; Mangalaraja, Ramalinga Viswanathan; Sorrentino, Andrea; Anandan, Sambandam
    The conversion of carbon dioxide (CO2) into valuable hydrocarbons, such as alkanes, alkenes, and polycarbonates, offers a promising strategy for reducing greenhouse gas emissions while generating sustainable fuels. This study investigates Nickel-based Metal-Organic Frameworks (Ni-MOFs) as efficient photocatalysts for CO2 reduction and converting alcohols, particularly propanol, into alkanes such as propane. Synthesized Ni-MOFs using 2-methyl imidazole as the organic linker exhibit high surface area and tunable pore sizes, enhancing their catalytic performance. Under visible-light irradiation, these photocatalysts demonstrate remarkable activity in converting CO2 into hydrocarbons with high selectivity and yield. The improved performance is attributed to strong electronic interactions between nickel ions and organic linkers, facilitating efficient charge separation and transfer. This work underscores Ni-MOFs' potential in sustainable CO2 valorization, offering an innovative approach to renewable hydrocarbon production. © 2025 The Authors