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By an immersion process combined with calcination treatment, the resultant porous ZFSQ composites with different contents of SnO<jats:sub>2<\/jats:sub> QDs were obtained, and their sensing properties were investigated. Compared with bare ZnFe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> and SnO<jats:sub>2<\/jats:sub> QDs, porous ZFSQ composites based-sensors showed much improved sensor response to acetone. For contrast, the sensor performance of ZFSQ composites was also compared with that of ZnFe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> sphere modified by SnO<jats:sub>2<\/jats:sub> nanoparticles with different size. The porous ZFSQ composite with 5 wt% SnO<jats:sub>2<\/jats:sub> QDs (ZFSQ-5) showed a better acetone sensing response than that of other ZFSQ composites, and it exhibited a high response value of 110\u2013100 ppm of acetone and a low detection limit of 0.3 ppm at 240 \u00b0C. In addition to the rich heterojunctions and porous structure, the size effect of SnO<jats:sub>2<\/jats:sub> QDs was other indispensable reasons for the improved sensor performance. Finally, the ZFSQ-5 composite sensor was attempted to be applied for acetone sensing in exhaled breath, suggesting its great potential in monitoring acetone.<\/jats:p>","DOI":"10.1088\/1361-6528\/ad39f3","type":"journal-article","created":{"date-parts":[[2024,4,3]],"date-time":"2024-04-03T22:20:55Z","timestamp":1712182855000},"page":"275502","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["SnO<sub>2<\/sub> QDs sensitized ZnFe<sub>2<\/sub>O<sub>4<\/sub> spheres with enhanced acetone sensing performance"],"prefix":"10.1088","volume":"35","author":[{"given":"Qiming","family":"Yuan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weichao","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhangcheng","family":"Xia","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingjie","family":"Hu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5164-8956","authenticated-orcid":false,"given":"Lifang","family":"He","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ling","family":"Jin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liqiang","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiangfeng","family":"Chu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kui","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2024,4,23]]},"reference":[{"key":"nanoad39f3bib1","doi-asserted-by":"publisher","first-page":"522","DOI":"10.1016\/j.snb.2012.11.063","article-title":"The sensing mechanism and detection of low concentration acetone using chitosan-based sensors","volume":"177","author":"Nasution","year":"2013","journal-title":"Sens. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2023-08-13","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-04-03","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2024-04-23","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}