Li Hao-Ran, Xu Huan, Wang Qiu-Yu, Li Shan-Shan
Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Anhui Province Industrial Generic Technology Research Center for Alumics Materials, School of Physics and Electronic Information, Huaibei Normal University, Huaibei, 235000, PR China.
Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Anhui Province Industrial Generic Technology Research Center for Alumics Materials, School of Physics and Electronic Information, Huaibei Normal University, Huaibei, 235000, PR China.
Talanta. 2025 Apr 1;285:127360. doi: 10.1016/j.talanta.2024.127360. Epub 2024 Dec 10.
Transition metal oxides (TMOs) can effectively improve the performance of electrochemical detection due to their unique electronic structure and redox properties. However, the lack of reproducibility and the electrical activity of TMOs prepared from conventional preparation methods limit their further development. In this work, amorphous MoO with reductive Mo(V) was successfully synthesized by one-step electrodeposition, and it has excellent detection performance for p-nitrophenol (PNP). In general, the prepared amorphous mixed-valence MoO has rich reductive Mo(V), which produces valence change and accelerates electron transfer during detection. Moreover, the prepared material contains considerable oxygen vacancy, which remarkably enhances the adsorption process and redox of PNP. Through the synergistic effect of valence state transformation and oxygen vacancy, the catalytic redox of PNP is expedited. The sensitivity of the prepared MoO modified electrode to PNP was 0.5266 μA μM, and the low detection limit was 0.0196 μM. MoO also shows good anti-interference, stability and reproducibility. On this basis, we can further optimize the electrodeposition process to prepare transition metal oxides with excellent catalytic properties in the future, and promote its wide application in the field of environmental monitoring and sensing.
过渡金属氧化物（TMOs）因其独特的电子结构和氧化还原性质，能够有效提升电化学检测性能。然而，传统制备方法所制备的TMOs缺乏重现性以及电活性，限制了它们的进一步发展。在这项工作中，通过一步电沉积成功合成了具有还原性Mo(V)的非晶态MoO，并且它对对硝基苯酚（PNP）具有优异的检测性能。一般来说，所制备的非晶态混合价态MoO含有丰富的还原性Mo(V)，在检测过程中会发生价态变化并加速电子转移。此外，所制备的材料含有大量氧空位，这显著增强了PNP的吸附过程和氧化还原反应。通过价态转变和氧空位的协同作用，加速了PNP的催化氧化还原反应。所制备的MoO修饰电极对PNP的灵敏度为0.5266 μA μM，低检测限为0.0196 μM。MoO还表现出良好的抗干扰性、稳定性和重现性。在此基础上，未来我们可以进一步优化电沉积工艺，制备出具有优异催化性能的过渡金属氧化物，并推动其在环境监测与传感领域的广泛应用。
