碱插层 TiC 用 ZIF-8@ZIF-67 衍生的 N 掺杂碳纳米笼修饰用于检测 4-硝基苯酚。
Decoration of alkalization-intercalated TiC with ZIF-8@ZIF-67-derived N-doped carbon nanocage for detecting 4-nitrophenol.
机构信息
School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
出版信息
Mikrochim Acta. 2023 Mar 14;190(4):133. doi: 10.1007/s00604-023-05713-2.
The highly effective alk-TiC/bimetallic Co, Zn embedded N-doped carbon (Co-Zn-NC) composite was fabricated by a convenient self-assembled method strategy and applied to the reduction of 4-nitrophenol(4-NP). Co-Zn-NC nanocage was synthesized by using designed core-shell ZIF-8@ZIF-67 as sacrificial template. The Co-Zn-NC was prepared by pyrolysis of ZIF-8@ZIF-67 at 900 °C with high-specific surface area and hollow structure, which facilitates the dispersion of Co species and produces abundant Co-Nx active sites. In addition, the electrochemical property and specific surface area of TiC were improved by alkaline treatment. As a result, compared with alk-TiC and Co-Zn-NC, the alk-TiC/Co-Zn-NC sensor showed higher activity and stability in detecting 4-NP. The alk-TiC/Co-Zn-NC sensor has a wide determination range of 2-500 μM and a low detection limit of 0.23 μM for 4-NP. In addition, the newly developed alk-TiC/Co-Zn-NC sensor displayed satisfactory reproducibility and good stability in detecting 4-NP in aqueous samples.
高效的碱处理 TiC/双金属 Co、Zn 嵌入的 N 掺杂碳（Co-Zn-NC）复合材料是通过简便的自组装方法策略制备的，并应用于 4-硝基苯酚（4-NP）的还原。通过使用设计的核壳 ZIF-8@ZIF-67 作为牺牲模板，合成了 Co-Zn-NC 纳米笼。Co-Zn-NC 是通过在 900°C 下热解 ZIF-8@ZIF-67 制备的，具有高比表面积和空心结构，有利于 Co 物种的分散并产生丰富的 Co-Nx 活性位。此外，TiC 的电化学性能和比表面积通过碱处理得到了提高。结果表明，与碱处理 TiC 和 Co-Zn-NC 相比，碱处理 TiC/Co-Zn-NC 传感器在检测 4-NP 时表现出更高的活性和稳定性。碱处理 TiC/Co-Zn-NC 传感器对 4-NP 的检测范围为 2-500 μM，检测限低至 0.23 μM。此外，新开发的碱处理 TiC/Co-Zn-NC 传感器在检测水样中的 4-NP 时表现出令人满意的重现性和良好的稳定性。
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