兴奋剂
化学
吸附
过渡金属
掺杂剂
检出限
电化学
水溶液中的金属离子
催化作用
金属
钴
无机化学
纳米材料
分析化学(期刊)
纳米技术
电极
物理化学
材料科学
光电子学
生物化学
有机化学
色谱法
作者
Zheng Liu,Xia Xu,Chun-Jie Ye,Huan Xu,Qiuyu Wang,Zi-Yi Zheng,S. M. Li,Zhonggang Liu,Zheng Guo
标识
DOI:10.1016/j.aca.2023.341937
摘要
Transition metal oxides are widely used in the detection of heavy metal ions (HMIs), and the co-doping strategy that introducing a variety of different dopant atoms to modify them can obtain a better detection performance. However, there is very little research on the co-doped transition metal oxides by non-metallic elements for electrochemical detection. Herein, boron (B) and fluorine (F) co-doped CeO2 nanomaterial (BFC) is constructed to serve as the electrochemically sensitive interface for the detection of Hg(II). B and F affect the sensitivity of CeO2 to HMIs when they were introduced at different doping sites. Through a variety of characterization, it is proved that B is successfully doped into the lattice and F is doped on the surface of the material. Through the improvement of the catalytic properties and adsorption capacity of CeO2 by different doping sites, this B and F co-doped CeO2 exhibits excellent square wave anodic stripping voltammetry (SWASV) current responses to Hg(II). Both the high sensitivity of 906.99 μA μM-1 cm-2 and the low limit of detection (LOD) of 0.006 μM are satisfactory. Besides, this BFC glassy carbon electrode (GCE) also has good anti-interference property, which has been successfully used in the detection of Hg(II) in actual water. This discovery provides a useful strategy for designing a variety of non-metallic co-doped transition metal oxides to construct trace heavy metal ion-sensitive interfaces.
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