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Synthesis of FeVO4 Nanoparticles and Sensing Performance for Ethanol Gas under Different Solution pH
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-10-04 , DOI: 10.1002/crat.202100110 Yanhan Che 1 , Guoqing Feng 1 , Weijun Guo 1 , Jingkun Xiao 1 , Chengwen Song 1
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2021-10-04 , DOI: 10.1002/crat.202100110 Yanhan Che 1 , Guoqing Feng 1 , Weijun Guo 1 , Jingkun Xiao 1 , Chengwen Song 1
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FeVO4 nanoparticles are synthesized by the hydrothermal method. The effect of micromorphology under different pH conditions is investigated. Their microstructure, morphology, and chemical composition are analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and N2 adsorption–desorption. The results showed that an increase in pH leads to agglomeration of the material. The effect of different pH conditions on the gas-sensitive performance of FeVO4 is subsequently investigated, and the best response performance of the FeVO4 sensor is achieved at a pH of 3. The consequences showed that the FeVO4 sensor has a response of 3.383 to 100 ppm ethanol gas, with the response and recovery time of 1 and 7 s. The response cycle test has proved that FeVO4 has good stability. Analyzed in conjunction with the characterization results, the oxygen vacancies on the surface of the nanoparticles not only improve the electronic conductivity but also provide active sites for the adsorption of gases, which helps to improve the sensitivity of the material to gases.
中文翻译：
FeVO4纳米颗粒的合成及不同溶液pH下乙醇气体的传感性能
FeVO 4纳米颗粒是通过水热法合成的。研究了不同pH条件下微形态的影响。它们的微观结构、形态和化学成分通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS)、拉曼光谱和 N 2吸附-解吸进行分析。结果表明，pH值的增加导致材料的附聚。随后研究了不同 pH 条件对 FeVO 4气敏性能的影响，FeVO 4传感器的最佳响应性能在 pH 为 3 时实现。结果表明 FeVO 4传感器对 100 ppm 乙醇气体的响应为 3.383，响应和恢复时间分别为 1 秒和 7 秒。响应循环试验证明FeVO 4具有良好的稳定性。结合表征结果分析，纳米粒子表面的氧空位不仅提高了电子电导率，而且为气体吸附提供了活性位点，有助于提高材料对气体的敏感性。
更新日期：2021-12-11
中文翻译：
FeVO4纳米颗粒的合成及不同溶液pH下乙醇气体的传感性能
FeVO 4纳米颗粒是通过水热法合成的。研究了不同pH条件下微形态的影响。它们的微观结构、形态和化学成分通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS)、拉曼光谱和 N 2吸附-解吸进行分析。结果表明，pH值的增加导致材料的附聚。随后研究了不同 pH 条件对 FeVO 4气敏性能的影响，FeVO 4传感器的最佳响应性能在 pH 为 3 时实现。结果表明 FeVO 4传感器对 100 ppm 乙醇气体的响应为 3.383，响应和恢复时间分别为 1 秒和 7 秒。响应循环试验证明FeVO 4具有良好的稳定性。结合表征结果分析，纳米粒子表面的氧空位不仅提高了电子电导率，而且为气体吸附提供了活性位点，有助于提高材料对气体的敏感性。
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