Reduced phosphomolybdate as photoassisted electrochemical crystalline sensor for trace Cr(VI) detection
| Autor: | Hao Song, Meng-Si Guo, Jie-Fei Wang, Yu-Qing Liu, Hao-Xue Bi, Jing Du, Wen-Ting An, Yuan-Yuan Ma, Zhan-Gang Han |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Polyoxometalates, Vol 3, Iss 4, p 9140065 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2957-9821 2957-9503 |
| DOI: | 10.26599/POM.2024.9140065 |
| Popis: | The development of a sensitive and efficient detection technology for trace toxic hexavalent chromium (Cr(VI)) in water is a pressing concern. In this study, an hourglass-type phosphomolybdate-based metal–organic network with the formula [Na0.5Cu5.5(H2O)2(btmbp)4][Mn(H2O)3]2{Mn[H6P4Mo6O31]2}·10H2O (1, btmbp = 4,4'-bis((1H-1,2,4-triazol-1-yl)methyl)biphenyl) was hydrothermally synthesized. The crystal network consists of a ladder-like two-dimensional layered structure constructed by vertical connections of one-dimensional (1D) [Na0.5Cu5.5(H2O)2(btmbp)4]6+ metal–organic chains and 1D inorganic polyanionic chains. Compound 1 exhibits excellent electrochemical property and a wide light absorption range including visible light to accelerate the electron transfer in redox processes. When serving as a photoassisted electrochemical (PAEC) sensor for trace Cr(VI) detection, compound 1 exhibits a high sensitivity of 330.5 μA·μM−1 and a low detection limit of 0.95 nM (98.79 ppt) along with high anti-interference ability and excellent PAEC detection stability, outperforming most reported polyoxometalate-based sensors and equaling noble-metal sensors, far satisfying World Health Organization standards for Cr(VI) concentration in drinking water. This work provides a new photoelectrochemical sensor material for monitoring environmental pollutants. |
| Databáze: | Directory of Open Access Journals |
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