{"title":"Co ions doping enhances n-butanol sensing performance of In2O3 nanospheres","authors":"Zhiguo Yang, Xingtai Chen, Qiuying Chen, Jiayi Qu, Yujun Guo, Kaiwen Zhou, Tianren Wang, Davoud Dastan, Xiaoning Wang, Feifei Wang, Xiaoming Tan, Xi-Tao Yin, Xiaoguang Ma","doi":"10.1016/j.snb.2024.136898","DOIUrl":null,"url":null,"abstract":"In this work, In<sub>2</sub>O<sub>3</sub> nanospheres were synthesized using urea as a carbon template and modified with Co ions. The synthesized materials were characterized using various instruments to obtain information about the elemental composition and morphology of the materials. The results showed that Co ions replaced the lattice position of In ions and synthesized nanospheres aggregated from 20<!-- --> <!-- -->nm particles. The results of gas sensitivity tests on all the samples showed that the response to 50 ppm n-butanol at 250 °C reached 540 when Co was doped up to 5 at%. In comparison, the sensor showed very low response to benzene gas with good selectivity. The high response of the sensor to n-butanol is due to the increase in vacancy oxygen content and redox reactions due to the multivalent nature of Co ions. The article concludes with a detailed analysis of the sensing mechanism.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":null,"pages":null},"PeriodicalIF":8.0000,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators B: Chemical","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.snb.2024.136898","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, In2O3 nanospheres were synthesized using urea as a carbon template and modified with Co ions. The synthesized materials were characterized using various instruments to obtain information about the elemental composition and morphology of the materials. The results showed that Co ions replaced the lattice position of In ions and synthesized nanospheres aggregated from 20 nm particles. The results of gas sensitivity tests on all the samples showed that the response to 50 ppm n-butanol at 250 °C reached 540 when Co was doped up to 5 at%. In comparison, the sensor showed very low response to benzene gas with good selectivity. The high response of the sensor to n-butanol is due to the increase in vacancy oxygen content and redox reactions due to the multivalent nature of Co ions. The article concludes with a detailed analysis of the sensing mechanism.
本研究以尿素为碳模板，用 Co 离子修饰合成了 In2O3 纳米球。利用各种仪器对合成材料进行了表征，以获得材料的元素组成和形态信息。结果表明，Co 离子取代了 In 离子的晶格位置，合成的纳米球由 20 nm 的颗粒聚集而成。对所有样品进行的气体灵敏度测试结果表明，当 Co 的掺杂量达到 5 at% 时，在 250 °C 下对 50 ppm 正丁醇的响应达到 540。相比之下，传感器对苯气体的响应很低，但选择性很好。传感器对正丁醇的高响应是由于空位氧含量的增加和 Co 离子的多价性所导致的氧化还原反应。文章最后对传感机制进行了详细分析。
期刊介绍：
Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.
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