纳米材料
双金属片
材料科学
电化学
金属有机骨架
电化学气体传感器
纳米技术
纳米复合材料
化学工程
复合数
共价有机骨架
混合材料
金属
电极
化学
复合材料
物理化学
多孔性
吸附
冶金
工程类
作者
Wang Sun,Huacong Chu,Junyan Liu,Na Wang,Yang Wang
标识
DOI:10.1016/j.snb.2023.134146
摘要
In this study, a monomer-induced self-assembly growth path was proposed for the controllable synthesis of core-shell heterostructured MOF(Fe/Cu)DT@COF hybrid nanomaterial (MOF, metal-organic framework; COF, covalent-organic framework; DT, 2,5-dimethoxyterephaldehyde), which exhibited highly ordered crystal structure and uniform distribution. Then, 2,4,6-trichlorophenol (TCP) was selected as the target molecule to construct the MOF(Fe/Cu)DT@COF electrochemical sensor for selective and sensitive detection. Relevant investigations indicate that the assembled columnar COF shell is availably able to promote the diffusion of TCP to the bimetallic active center of MOF, which exhibits excellent electrocatalytic performance via the synergistic effect. The two linear dynamic ranges of current response under the optimal conditions (pH = 8.0) are 0.01–10 and 10–900 μmol L-1, respectively, with a 0.003 μmol·L-1 (S/N = 3) detection limit. On this sensor platform, there was also negligible interference from other ions that were present, which allowed the sensor based on MOF(Fe/Cu)DT@COF to detect low abundance TCP from actual samples. The article will inspire engineers and scientists working in the field of MOFs/COFs, whose concerted efforts will lead to more novel nanomaterials and will speed up the development of electrochemical sensing based on heterostructured hybrids of MOFs and COFs.
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