基于 MOF 模板法合成 Ce 掺杂 Co3O4 富氧空位纳米花及其气敏性能

doi:10.12066/j.issn.1007-2861.2284

上海大学学报(自然科学版) ›› 2022, Vol. 28 ›› Issue (1): 19-30.doi: 10.12066/j.issn.1007-2861.2284

基于 MOF 模板法合成 Ce 掺杂 Co₃O₄ 富氧空位纳米花及其气敏性能

何永超, 李飞, 颜炳君, 何新华, 浦娴娟, 宁珠凯, 程伶俐, 焦正()

上海大学环境与化学工程学院, 上海 200444

收稿日期:2020-02-26 出版日期:2022-02-28 发布日期:2022-03-02
通讯作者: 焦正 E-mail:zjiao@shu.edu.cn
作者简介:焦正(1972—), 男, 教授, 博士生导师, 博士, 研究方向为纳米敏感材料和纳米器件. E-mail: zjiao@shu.edu.cn
基金资助:
国家自然科学基金资助项目(21671128);国家自然科学基金资助项目(21671130);国家自然科学基金资助项目(41807304);国家自然科学基金资助项目(21805181);中国博士后科学基金资助项目(2017M611529)

Synthesis of Ce-doped Co₃O₄ nanoflowers with rich oxygen vacancies based on MOF template method for enhancing gas sensing performance

HE Yongchao, LI Fei, YAN Bingjun, HE Xinhua, PU Xianjuan, NING Zhukai, CHENG Lingli, JIAO Zheng()

School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received:2020-02-26 Online:2022-02-28 Published:2022-03-02
Contact: JIAO Zheng E-mail:zjiao@shu.edu.cn

摘要/Abstract

摘要：

Co₃O₄ 纳米材料在气体传感器应用中, 存在灵敏度不高、响应恢复时间长等问题. 采用简单的溶剂热法制备了 Ce 掺杂的 Co 基金属有机骨架 (metal organic framework, MOF) 前体. 通过热处理成功合成了 Ce 掺杂 Co₃O₄ 纳米花, 并通过 X 射线衍射 (X-ray diffraction, XRD)、扫描电子显微镜 (scanning electron microscope, SEM)、X 射线光电子能谱 (X-ray photoelectron spectroscope, XPS)、能量色散光谱 (energy dispersive spectroscope, EDS) 等表征方法, 对材料进行了物相形貌分析. 结果显示: Ce 掺杂能有效改变 Co₃O₄ 的氧分布态, 提高其氧空位含量, 由此材料制成的传感器显示出了优异的传感性能; 在 190 °C 操作温度下, 该传感器对 100×10^-6 正丁醇的响应值可达 87.79, 且其计算所得理论检出限可达 122×10^-9 .

关键词: Ce 掺杂, Co₃O₄ , 气体传感器, 氧空位

Abstract:

Co₃O₄ nanomaterials have low sensitivity and long response/recovery time in gas sensor applications. Ce-doped Co-based metal organic framework (MOF) precursors were prepared by a simple solvothermal method and Ce-doped Co₃O₄ nanoflowers were then successfully synthesised by heat treatment. The morphology and composition of the materials were analysed by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscope (XPS), energy dispersive spectroscope (EDS), and other characterization methods. The results indicated that Ce doping could effectively change the oxygen distribution and increase the number of oxygen vacancies in Co₃O₄ . The sensor made of this material exhibited an excellent sensing performance. At an operating temperature of 190 °C, the response to 100×10^-6 n-butanol could reach 87.79 and the calculated theoretical detection limit could reach 122×10^-9.

Key words: Ce-doped, Co₃O₄ , gas sensors, oxygen vacancies

中图分类号:

TQ152

何永超, 李飞, 颜炳君, 何新华, 浦娴娟, 宁珠凯, 程伶俐, 焦正. 基于 MOF 模板法合成 Ce 掺杂 Co₃O₄ 富氧空位纳米花及其气敏性能[J]. 上海大学学报(自然科学版), 2022, 28(1): 19-30.

HE Yongchao, LI Fei, YAN Bingjun, HE Xinhua, PU Xianjuan, NING Zhukai, CHENG Lingli, JIAO Zheng. Synthesis of Ce-doped Co₃O₄ nanoflowers with rich oxygen vacancies based on MOF template method for enhancing gas sensing performance[J]. Journal of Shanghai University（Natural Science Edition）, 2022, 28(1): 19-30.

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基于 MOF 模板法合成 Ce 掺杂 Co₃O₄ 富氧空位纳米花及其气敏性能

Synthesis of Ce-doped Co₃O₄ nanoflowers with rich oxygen vacancies based on MOF template method for enhancing gas sensing performance

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