Yong-Hui Zhang , Yu-Liang Li , Fei-Long Gong , Ke-Fei Xie , Min Liu , Hao-Li Zhang , Shao-Ming Fang
{"title":"Al掺杂水仙状ZnO增强NO2传感性能:实验和DFT研究","authors":"Yong-Hui Zhang , Yu-Liang Li , Fei-Long Gong , Ke-Fei Xie , Min Liu , Hao-Li Zhang , Shao-Ming Fang","doi":"10.1016/j.snb.2019.127489","DOIUrl":null,"url":null,"abstract":"<div><p>A narcissus-like Al doped ZnO nanostructure was successfully synthesized via a facile, controllable and one-pot hydrothermal method. The materials as-prepared presented a hierarchical narcissus-like structure with self-assembled by nanosheets. Gas sesing test results revealed that the Al-doped narcissus-like ZnO nanostructure (2 at %, labeled as AZO-2) showed 3 folds gas sensing response (103.2 for NO<sub>2</sub> with 1 ppm) with shorter response-recovery time (53 s/21 s), lower detection concentration (0.1 ppm) compared with those of pure ZnO. Moreover, AZO-2 had lower operating temperature (240 °C) and and superior long-life stability (remained around 92.5 % after 35 days), which quite promising for practical applications. Density functional theory (DFT) calculation suggests that the adsorption energy of NO<sub>2</sub> on AZO-2 is 5.15 folds higher than that of pure ZnO, which is attributed to the change of electronic structure that enhances the interaction between NO<sub>2</sub> and the modified ZnO. The excellent sensing performance could be attributed to the increase of oxygen vacancy content due to the Al doping. Thus, the Al doped narcissus-like ZnO nanocrystals could provide an inspiration to regulate the electronic structure and design highly sensitive NO<sub>2</sub> gas sensor.</p></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"305 ","pages":"Article 127489"},"PeriodicalIF":8.0000,"publicationDate":"2020-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.snb.2019.127489","citationCount":"62","resultStr":"{\"title\":\"Al doped narcissus-like ZnO for enhanced NO2 sensing performance: An experimental and DFT investigation\",\"authors\":\"Yong-Hui Zhang , Yu-Liang Li , Fei-Long Gong , Ke-Fei Xie , Min Liu , Hao-Li Zhang , Shao-Ming Fang\",\"doi\":\"10.1016/j.snb.2019.127489\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A narcissus-like Al doped ZnO nanostructure was successfully synthesized via a facile, controllable and one-pot hydrothermal method. The materials as-prepared presented a hierarchical narcissus-like structure with self-assembled by nanosheets. Gas sesing test results revealed that the Al-doped narcissus-like ZnO nanostructure (2 at %, labeled as AZO-2) showed 3 folds gas sensing response (103.2 for NO<sub>2</sub> with 1 ppm) with shorter response-recovery time (53 s/21 s), lower detection concentration (0.1 ppm) compared with those of pure ZnO. Moreover, AZO-2 had lower operating temperature (240 °C) and and superior long-life stability (remained around 92.5 % after 35 days), which quite promising for practical applications. Density functional theory (DFT) calculation suggests that the adsorption energy of NO<sub>2</sub> on AZO-2 is 5.15 folds higher than that of pure ZnO, which is attributed to the change of electronic structure that enhances the interaction between NO<sub>2</sub> and the modified ZnO. The excellent sensing performance could be attributed to the increase of oxygen vacancy content due to the Al doping. Thus, the Al doped narcissus-like ZnO nanocrystals could provide an inspiration to regulate the electronic structure and design highly sensitive NO<sub>2</sub> gas sensor.</p></div>\",\"PeriodicalId\":425,\"journal\":{\"name\":\"Sensors and Actuators B: Chemical\",\"volume\":\"305 \",\"pages\":\"Article 127489\"},\"PeriodicalIF\":8.0000,\"publicationDate\":\"2020-02-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.snb.2019.127489\",\"citationCount\":\"62\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sensors and Actuators B: Chemical\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0925400519316880\",\"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/S0925400519316880","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
Al doped narcissus-like ZnO for enhanced NO2 sensing performance: An experimental and DFT investigation
A narcissus-like Al doped ZnO nanostructure was successfully synthesized via a facile, controllable and one-pot hydrothermal method. The materials as-prepared presented a hierarchical narcissus-like structure with self-assembled by nanosheets. Gas sesing test results revealed that the Al-doped narcissus-like ZnO nanostructure (2 at %, labeled as AZO-2) showed 3 folds gas sensing response (103.2 for NO2 with 1 ppm) with shorter response-recovery time (53 s/21 s), lower detection concentration (0.1 ppm) compared with those of pure ZnO. Moreover, AZO-2 had lower operating temperature (240 °C) and and superior long-life stability (remained around 92.5 % after 35 days), which quite promising for practical applications. Density functional theory (DFT) calculation suggests that the adsorption energy of NO2 on AZO-2 is 5.15 folds higher than that of pure ZnO, which is attributed to the change of electronic structure that enhances the interaction between NO2 and the modified ZnO. The excellent sensing performance could be attributed to the increase of oxygen vacancy content due to the Al doping. Thus, the Al doped narcissus-like ZnO nanocrystals could provide an inspiration to regulate the electronic structure and design highly sensitive NO2 gas sensor.
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.