Gandra Upendar Reddy, Pandey Ravi P, Palanikumar L, Irfan Ahamad, Magzoub Mazin, Belmabkhout Youssef, Hasan Shadi W, Mohideen M Infas Haja
Department of Chemistry, Khalifa University of Science and Technology, P.O. Box 127788 Abu Dhabi, United Arab Emirates.
Department of Chemical and Petroleum Engineering, Khalifa University of Science and Technology, P.O. Box 127788 Abu Dhabi, United Arab Emirates.
ACS Appl Mater Interfaces. 2025 Feb 12;17(6):9563-9574. doi: 10.1021/acsami.4c18944. Epub 2025 Feb 2.
Cyanide is highly toxic, with widespread industrial use posing serious environmental risks. Effective materials for detecting and filtering cyanide from water are urgently needed. This study introduces a novel approach utilizing Cu-TCPP (TCPP = -tetra(4-carboxyphenyl)porphine) metal-organic nanosheets (MONS) embedded in thin-film composite membranes, offering a multifunctional solution for cyanide detection and filtration. Ultrathin Cu-TCPP MONs were synthesized using a surfactant-assisted method featuring highly accessible metal centers that enhance cyanide interaction and detection. The membranes, developed by modifying cellulose acetate (CA) with Cu-TCPP MONs, demonstrated exceptional performance for cyanide removal. The 6% Cu-TCPP/CA membrane exhibited a 2.3-fold increase in pure water permeability and achieved a cyanide removal efficiency of 94.68%, significantly outperforming the pristine 0% Cu-TCPP/CA membrane (Pure Water Permeability (PWP) = 380.83 L m h bar; CN removal = 5.01%). This is the first report describing the detection and removal of CN in water using the membrane technique in literature. In addition to its removal efficiency, the Cu-TCPP MONs showed remarkable detection capabilities, with a calculated limit of detection of 1.76 × 10 M, surpassing World Health Organization (WHO) and United States Environmental Protection Agency (EPA) safety standards for cyanide levels in water. Additionally, Cu-TCPP MONs, a bioimaging agent with excellent cell viability, were deployed to detect CN in MiaPaCa-2 cells, detecting concentrations as low as 0.1 ppm.
氰化物具有高毒性，其在工业上的广泛使用带来了严重的环境风险。迫切需要能有效检测和过滤水中氰化物的材料。本研究引入了一种新方法，利用嵌入在薄膜复合膜中的Cu-TCPP（TCPP = -四（4-羧基苯基）卟啉）金属有机纳米片（MONS），为氰化物检测和过滤提供了一种多功能解决方案。采用具有高可及性金属中心的表面活性剂辅助方法合成了超薄Cu-TCPP MONS，该金属中心增强了与氰化物的相互作用及检测能力。通过用Cu-TCPP MONS对醋酸纤维素（CA）进行改性而制备的膜，在氰化物去除方面表现出优异性能。6% Cu-TCPP/CA膜的纯水渗透率提高了2.3倍，氰化物去除效率达到94.68%，明显优于原始的0% Cu-TCPP/CA膜（纯水渗透率（PWP）= 380.83 L m h bar；CN去除率 = 5.01%）。这是文献中首次报道使用膜技术检测和去除水中的CN。除了去除效率外，Cu-TCPP MONS还表现出显著的检测能力，计算得出的检测限为1.76×10 M，超过了世界卫生组织（WHO）和美国环境保护局（EPA）规定的水中氰化物水平安全标准。此外，具有优异细胞活力的生物成像剂Cu-TCPP MONS被用于检测MiaPaCa-2细胞中的CN，可检测低至0.1 ppm的浓度。
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