{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T06:33:27Z","timestamp":1773470007657,"version":"3.50.1"},"reference-count":41,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2024,2,21]],"date-time":"2024-02-21T00:00:00Z","timestamp":1708473600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62271176"],"award-info":[{"award-number":["62271176"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["2022-JCJQ-JJ-0438"],"award-info":[{"award-number":["2022-JCJQ-JJ-0438"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"China National Basic Enhancement Program","award":["62271176"],"award-info":[{"award-number":["62271176"]}]},{"name":"China National Basic Enhancement Program","award":["2022-JCJQ-JJ-0438"],"award-info":[{"award-number":["2022-JCJQ-JJ-0438"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Modern chemical production processes often emit complex mixtures of gases, including hazardous pollutants such as NO2. Although widely used, gas sensors based on metal oxide semiconductors such as WO3 respond to a wide range of interfering gases other than NO2. Consequently, developing WO3 gas sensors with high NO2 selectivity is challenging. In this study, a simple one-step hydrothermal method was used to prepare WO3 nanorods modified with black phosphorus (BP) flakes as sensitive materials for NO2 sensing, and BP-WO3-based micro-electromechanical system gas sensors were fabricated. The characterization of the as-prepared BP-WO3 composite through X-ray diffraction scanning electron microscopy and X-ray photoelectron spectroscopy confirmed the successful formation of the sandwich-like nanostructures. The result of gas-sensing tests with 2\u201314 ppm NO2 indicated that the sensor response was 1.25\u20132.21 with response\u2013recovery times of 36 and 36 s, respectively, at 190 \u00b0C. In contrast to pure WO3, which exhibited a response of 1.07\u20132.2 to 0.3\u20135 ppm H2S at 160 \u00b0C, BP-WO3 showed almost no response to H2S. Thus, compared with pure WO3, BP-WO3 exhibited significantly improved NO2 selectivity. Overall, the BP-WO3 composite with sandwich-like nanostructures is a promising material for developing highly selective NO2 sensors for practical applications.<\/jats:p>","DOI":"10.3390\/s24051376","type":"journal-article","created":{"date-parts":[[2024,2,21]],"date-time":"2024-02-21T04:23:10Z","timestamp":1708489390000},"page":"1376","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Black Phosphorus\u2013Tungsten Oxide Sandwich-like Nanostructures for Highly Selective NO2 Detection"],"prefix":"10.3390","volume":"24","author":[{"given":"Canda","family":"Zheng","sequence":"first","affiliation":[{"name":"Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China"}]},{"given":"Yunbo","family":"Shi","sequence":"additional","affiliation":[{"name":"Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China"}]},{"given":"Bolun","family":"Tang","sequence":"additional","affiliation":[{"name":"Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China"}]},{"given":"Jianhua","family":"Zhang","sequence":"additional","affiliation":[{"name":"Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin University of Science and Technology, Harbin 150080, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1016\/j.jallcom.2015.09.021","article-title":"UV-assisted room-temperature chemiresistive NO2 sensor based on TiO2 thin film","volume":"653","author":"Xie","year":"2015","journal-title":"J. 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