Fe/Ni-MOF衍生的Fe^(3+)掺杂NiO丙酮传感器研究  

Study on Fe^(3+)Doped NiO Acetone Sensor Derived from Fe/Ni-MOF

作　　者：李晓逸 辛建钢 朱志刚 解丽丽[1] LI Xiaoyi;XIN Jiangang;ZHU Zhigang;XIE Lili(School of Energy and Materials,Shanghai Polytechnic University,Shanghai 201209,China;School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海第二工业大学能源与材料学院,上海201209 [2]上海理工大学健康科学与工程学院,上海200093

出　　处：《上海第二工业大学学报》2023年第3期183-192,共10页Journal of Shanghai Polytechnic University

摘　　要：采用水热法制备了球形纳米花状Fe/Ni-MOF,通过煅烧制备其衍生物Fe^(3+)掺杂的NiO(标记为Fe-NiO),对系列Fe-NiO进行表征并制备成传感器研究其气敏性能。通过表征和测试发现,Fe3+是通过原位合成进入NiO晶格中取代Ni^(2+),Fe^(3+)的加入不仅有助于Fe-NiO在高温煅烧后保持更好的形貌,而且能够降低NiO中的载流子浓度增加空气中的电阻,有助于传感器性能的提升。Fe3+掺杂量为15%的样品对5×10^(-6)丙酮具备最佳的传感性能,灵敏度达到327.4%,气敏性能较纯NiO提升了13倍,在150℃的工作温度下具有快的响应速度(7 s),电阻恢复90%需26 s,可在短时间内用于检测丙酮目标气体。Fe-NiO-15%制成的丙酮传感器具有良好的重复性、稳定性,受湿度影响小。Nano-flowered spherical Fe/Ni-MOF was prepared by hydrothermal method,and its derivative Fe3+doped NiO(named as Fe-NiO)was prepared by calcination.The series of Fe-NiO were characterized and prepared as sensors to study their gas sensing properties.Through characterization and testing,it was found that Fe^(3+)was synthesized in situ into NiO lattice by replacing Ni2+.The addition of Fe3+not only helps Fe-NiO maintain better morphology through calcining at high temperature,but also can reduce the carrier concentration in NiO and increase the resistance in air,which is beneficial to the improvement of sensor performance.The sample doped with 15%Fe3+has the best sensing performance for 5×10^(-6) acetone and the sensitivity reaching 327.4%,which is 13 times higher than that of pure NiO.It has a fast response speed(7 s)at the working temperature of 150℃,and the resistance recovery of 90% needs 26 s.It can be used for detecting the target gas of acetone in a short time.The acetone sensor made of Fe-NiO-15% has good repeatability,stability and little influence by humidity.

关 键 词：金属有机框架 气体传感器 丙酮 Fe^(3+)掺杂NiO 

分 类 号：TB34[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]