{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T12:04:24Z","timestamp":1790856264798,"version":"4.1.0"},"reference-count":25,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,1,11]],"date-time":"2022-01-11T00:00:00Z","timestamp":1641859200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>The indoor environment of buildings affects people\u2019s daily life. Indoor harmful gases include volatile organic gas and greenhouse gas. Therefore, the detection of harmful gas by gas sensors is a key method for developing green buildings. The reasonable design of SnO2-sensing materials with excellent structures is an ideal choice for gas sensors. In this study, three types of hierarchical SnO2 microspheres assembled with one-dimensional nanorods, including urchin-like microspheres (SN-1), flower-like microspheres (SN-2), and hydrangea-like microspheres (SN-3), are prepared by a simple hydrothermal method and further applied as gas-sensing materials for an indoor formaldehyde (HCHO) gas-sensing test. The SN-1 sample-based gas sensor demonstrates improved HCHO gas-sensing performance, especially demonstrating greater sensor responses and faster response\/recovery speeds than SN-2- and SN-3-based gas sensors. The improved HCHO gas-sensing properties could be mainly attributed to the structural difference of smaller nanorods. These results further indicate the uniqueness of the structure of the SN-1 sample and its suitability as HCHO- sensing material.<\/jats:p>","DOI":"10.3390\/nano12020228","type":"journal-article","created":{"date-parts":[[2022,1,11]],"date-time":"2022-01-11T20:33:04Z","timestamp":1641933184000},"page":"228","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":63,"title":["Hydrothermal Synthesis of Hierarchical SnO2 Nanostructures for Improved Formaldehyde Gas Sensing"],"prefix":"10.3390","volume":"12","author":[{"given":"Pengyu","family":"Ren","sequence":"first","affiliation":[{"name":"College of Architecture and Urban Planning, Chongqing Jiaotong University, Chongqing 400074, China"},{"name":"School of Management Science and Real Estate, Chongqing University, Chongqing 400044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingling","family":"Qi","sequence":"additional","affiliation":[{"name":"School of Management Science and Real Estate, Chongqing University, Chongqing 400044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kairui","family":"You","sequence":"additional","affiliation":[{"name":"School of Management Science and Real Estate, Chongqing University, Chongqing 400044, China"},{"name":"Business College, Southwest University, Chongqing 402460, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9529-7481","authenticated-orcid":false,"given":"Qingwei","family":"Shi","sequence":"additional","affiliation":[{"name":"School of Management Science and Real Estate, Chongqing University, Chongqing 400044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"15119","DOI":"10.1016\/j.ceramint.2016.06.145","article-title":"Detection of hazardous volatile organic compounds (VOCs) by metal oxide nanostructures-based gas sensors: A review","volume":"42","author":"Mirzaei","year":"2016","journal-title":"Ceram. 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