Improved gas-sensitive properties for ethanol and acetone in Zn-doped CoTiO3 nanoparticles

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Materials Science: Materials in Electronics Pub Date : 2024-11-17 DOI:10.1007/s10854-024-13802-y

Wenzhao Zhang, Ruqu Han, Bingjie Cheng, Yishu Xian, Hongbo Li, Jun Xiang, Yamei Zhang

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Abstract

Appropriate element doping is an important means to improve gas response. Pure and Zn-doped CoTiO₃ nanoparticles were fabricated by a simple sol–gel method and their gas response to ethanol and acetone was studied. Compared with pure CoTiO₃ nanoparticles, particle dispersion, specific surface area, oxygen vacancy defects, and gas-sensitive properties of Zn-doped CoTiO₃ nanoparticles are optimized and improved. With the increase of Zn doping concentration, the aggregates composed of irregular nanoparticles disperse loosely and the oxygen vacancy defects on the CoTiO₃ nanoparticles’ surface accordingly increase. The optimum operating temperature of Zn-doped CoTiO₃ nanoparticles is slightly reduced from 286 to 260 °C. CoTiO₃ nanoparticles with Zn doping concentration of 0.05 especially show excellent gas-sensing properties. The sensitivities of Co_0.95Zn_0.05TiO₃ nanoparticles to 50 ppm ethanol and acetone are as high as 125.8 and 143.4, increased to 1.98 and 1.74 times higher than those of pure CoTiO₃ nanoparticles. The linear fitting of logarithmic relationship between sensitivity and concentration shows that Zn-doped CoTiO₃ can accurately detect low concentration (< 100 ppm) of ethanol and acetone. The improvement of gas response of Zn-doped CoTiO₃ nanoparticles is proposed to attribute to the synergistic effect of the agglomeration state of irregular particles and abundant oxygen vacancies on the surface due to Zn doping.

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提高掺锌 CoTiO3 纳米粒子对乙醇和丙酮的气敏性能

适当的元素掺杂是改善气体响应的重要手段。本文采用简单的溶胶-凝胶法制备了纯的和掺杂锌的 CoTiO3 纳米粒子，并研究了它们对乙醇和丙酮的气体响应。与纯 CoTiO3 纳米粒子相比，掺杂 Zn 的 CoTiO3 纳米粒子的颗粒分散性、比表面积、氧空位缺陷和气敏性能都得到了优化和改善。随着 Zn 掺杂浓度的增加，由不规则纳米粒子组成的聚集体分散松散，CoTiO3 纳米粒子表面的氧空位缺陷相应增加。掺杂锌的 CoTiO3 纳米粒子的最佳工作温度从 286 °C略微降低到 260 °C。Zn 掺杂浓度为 0.05 的 CoTiO3 纳米粒子尤其表现出优异的气体传感性能。Co0.95Zn0.05TiO3 纳米粒子对 50 ppm 乙醇和丙酮的灵敏度分别高达 125.8 和 143.4，是纯 CoTiO3 纳米粒子的 1.98 和 1.74 倍。灵敏度与浓度之间的对数线性拟合关系表明，掺杂 Zn 的 CoTiO3 可以准确检测低浓度（< 100 ppm）的乙醇和丙酮。掺杂锌的 CoTiO3 纳米粒子对气体响应的改善是由于不规则粒子的团聚状态和掺杂锌导致的表面大量氧空位的协同效应。

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来源期刊

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.