Cu取代提高Co3O4尖晶石SO2气敏性能

Sensor Letters Pub Date : 2020-02-01 DOI:10.1166/sl.2020.4199

P. N. Anantharamaiah, S. Giri

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引用次数: 4

摘要

采用共沉淀法合成了单相尖晶石氧化钴(Co3O4)和铜取代氧化钴(Co2.8Cu0.2O4)纳米材料。为了探索Co3O4和Co2.8Cu0.2O4材料在气体传感器制造中的潜在适用性，在3 ppm的气体浓度下，研究了它们在3种不同温度下的SO2气敏特性。未取代的Co3O4样品对SO2气体的响应较差，而cu取代的样品在三种温度下均表现出优异的气敏特性，如气体响应、响应时间和恢复时间。在3个温度中，200℃时气体响应最大，为7.5%，回收率和响应时间为26秒，为最佳温度。研究结果表明，纳米结构的Co2.8Cu0.2O4材料可以作为设计SO2气体传感器的潜在候选者，用于检测低浓度气体。

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Enhancement of SO2 Gas Sensing Performance of Co3O4 Spinel by Cu Substitution

Single-phase spinel cobalt oxide (Co3O4) and copper-substituted cobalt oxide (Co2.8Cu0.2O4) nanomaterials were synthesized via a co-precipitation route. To explore the potential applicability of the Co3O4 and Co2.8Cu0.2O4 materials for gas sensor fabrication, their SO2 gas sensing characteristics were studied at three different temperatures using the gas concentration of 3 ppm. Unsubstituted Co3O4 sample exhibits poor response towards SO2 gas whereas the Cu-substituted sample showed superior gas sensing characteristics such as gas response, response time and recovery time at all three temperatures. Among the three studied temperatures, the maximum gas response of 7.5% was found at 200 °C with recovery and response times of 26 sec, indicating an optimal temperature. Our results demonstrate that the nanostructured Co2.8Cu0.2O4 material could be a potential candidate to design SO2 gas sensor for detection of low concentration gas.

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来源期刊

Sensor Letters 工程技术-电化学

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.