{"title":"基于p-NiCo2O4/n-WO3异质结的高灵敏度NO2传感器","authors":"Yaqing Hu, Tingting Li, Jianhua Zhang, Jingyu Guo, Weiwei Wang, Dongzhi Zhang","doi":"10.1016/j.snb.2021.130912","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, a NO<sub>2</sub> gas sensor with outstanding sensing performance based on NiCo<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub><span><span><span> nanocomposite was synthesized by a </span>hydrothermal method<span>. A variety of testing methods such as XRD, </span></span>SEM<span>, TEM and XPS<span> were applied to characterize the microstructure, morphology and element compositions of the sensing material. The sensing properties of NiCo</span></span></span><sub>2</sub>O<sub>4</sub>/WO<sub>3</sub> composite films to NO<sub>2</sub> gas were studied at the optimal temperature of 150 <sup>o</sup>C. The test results of gas sensor showed that, compared with the pristine WO<sub>3</sub> sensor, the NiCo<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub> composite film sensor had higher response (116.9@20 ppm), shorter response/recovery time (13 s/16 s@20 ppm), good linearity, stable repeatability and brilliant selectivity. The enhanced gas sensitivity of NiCo<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub><span> nanocomposite films may be due to the synergistic effect of the unique microstructure of NiCo</span><sub>2</sub>O<sub>4</sub>/WO<sub>3</sub><span> and the p-n heterojunction formed between the two materials.</span></p></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":null,"pages":null},"PeriodicalIF":8.0000,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"45","resultStr":"{\"title\":\"High-sensitive NO2 sensor based on p-NiCo2O4/n-WO3 heterojunctions\",\"authors\":\"Yaqing Hu, Tingting Li, Jianhua Zhang, Jingyu Guo, Weiwei Wang, Dongzhi Zhang\",\"doi\":\"10.1016/j.snb.2021.130912\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this paper, a NO<sub>2</sub> gas sensor with outstanding sensing performance based on NiCo<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub><span><span><span> nanocomposite was synthesized by a </span>hydrothermal method<span>. A variety of testing methods such as XRD, </span></span>SEM<span>, TEM and XPS<span> were applied to characterize the microstructure, morphology and element compositions of the sensing material. The sensing properties of NiCo</span></span></span><sub>2</sub>O<sub>4</sub>/WO<sub>3</sub> composite films to NO<sub>2</sub> gas were studied at the optimal temperature of 150 <sup>o</sup>C. The test results of gas sensor showed that, compared with the pristine WO<sub>3</sub> sensor, the NiCo<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub> composite film sensor had higher response (116.9@20 ppm), shorter response/recovery time (13 s/16 s@20 ppm), good linearity, stable repeatability and brilliant selectivity. The enhanced gas sensitivity of NiCo<sub>2</sub>O<sub>4</sub>/WO<sub>3</sub><span> nanocomposite films may be due to the synergistic effect of the unique microstructure of NiCo</span><sub>2</sub>O<sub>4</sub>/WO<sub>3</sub><span> and the p-n heterojunction formed between the two materials.</span></p></div>\",\"PeriodicalId\":425,\"journal\":{\"name\":\"Sensors and Actuators B: Chemical\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.0000,\"publicationDate\":\"2022-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"45\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sensors and Actuators B: Chemical\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0925400521014805\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators B: Chemical","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925400521014805","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
High-sensitive NO2 sensor based on p-NiCo2O4/n-WO3 heterojunctions
In this paper, a NO2 gas sensor with outstanding sensing performance based on NiCo2O4/WO3 nanocomposite was synthesized by a hydrothermal method. A variety of testing methods such as XRD, SEM, TEM and XPS were applied to characterize the microstructure, morphology and element compositions of the sensing material. The sensing properties of NiCo2O4/WO3 composite films to NO2 gas were studied at the optimal temperature of 150 oC. The test results of gas sensor showed that, compared with the pristine WO3 sensor, the NiCo2O4/WO3 composite film sensor had higher response (116.9@20 ppm), shorter response/recovery time (13 s/16 s@20 ppm), good linearity, stable repeatability and brilliant selectivity. The enhanced gas sensitivity of NiCo2O4/WO3 nanocomposite films may be due to the synergistic effect of the unique microstructure of NiCo2O4/WO3 and the p-n heterojunction formed between the two materials.
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.