Self-heated CO gas sensor based on Au-decorated Sb-implanted WS2 nanosheets
Self-heated CO gas sensor based on Au-decorated Sb-implanted WS2 nanosheets
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DOI：
10.1016/j.snb.2023.133501
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发表时间：
2023-02
期刊：
影响因子：
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通讯作者：
Jae-Hun Kim;I. Sakaguchi;S. Hishita;T. Ohsawa;Taku T. Suzuki;N. Saito
中科院分区：
文献类型：
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作者：
Jae-Hun Kim;I. Sakaguchi;S. Hishita;T. Ohsawa;Taku T. Suzuki;N. Saito
在本研究中，锑离子注入顶型二硫化钨（WS 2）纳米片（NS）在四个不同的剂量和一氧化碳（CO）气敏性能进行了研究，在自加热模式。Sb ~（5+）与Sb ~（3+）的比例约为7：3，表明Sb ~（5+）离子占主导地位，并作为施主改变了WS ~（2+）型的电导率。注入2 × 1013 Sb离子/cm 2，然后在500 °C下退火，得到对CO气体具有最高响应的传感器。随后，最佳的气体传感器的表面修饰与Au纳米粒子（NPs），导致其改善响应CO气体。优化的气体传感器的增强的气体性能的相关的主要参数是O离子吸附的增加与S空位的产生，形成Au/Sb-WS 2异质结，和催化和溢出效应的Au NPs。利用Au修饰Sb注入的WS 2NS实现自加热CO气敏传感器的可能性得到了证实。
In this study, Sb ions were implanted intop-type tungsten disulfide (WS2) nanosheets (NSs) at four different doses and carbon monoxide (CO) gas-sensing properties were investigated in the self-heating mode. The ratio of Sb5+to Sb3+was approximately 7:3, implying that Sb5+ions were dominant and acted as donors to change the conductivity of WS2ton-type. Implanting 2 × 1013Sb ions/cm2followed by annealing at 500 °C resulted in a sensor with the highest response to CO gas. Subsequently, the surface of the optimal gas sensor was decorated with Au nanoparticles (NPs), leading to its improved response to CO gas. The main parameters related to the enhanced gas performance of the optimized gas sensor were the increase in O ionosorption with generation of S vacancies, formation of Au/Sb–WS2heterojunctions, and catalytic and spillover effects of Au NPs. The possibility of realizing a self-heated, CO-gas-sensitive sensor using decorating Sb-implanted WS2NSs with Au was demonstrated.