{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T15:17:39Z","timestamp":1791904659955,"version":"4.3.4"},"reference-count":70,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2023,11,28]],"date-time":"2023-11-28T00:00:00Z","timestamp":1701129600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science and Technology Council, Taiwan, R.O.C.","award":["NSTC110-2113-M-033-007"],"award-info":[{"award-number":["NSTC110-2113-M-033-007"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Hydrogen sulfide, a colorless, flammable gas with a distinct rotten egg odor, poses severe health risks in industrial settings. Sensing hydrogen sulfide is crucial for safeguarding worker safety and preventing potential accidents. This study investigated the gas-sensing performance of an electroactive polymer (i.e., polyaniline, PANI) and its composites with active carbon (AC) (i.e., PANI-AC1 and PANI-AC3) toward H2S at room temperature. PANI-AC composites-coated IDE gas sensors were fabricated and their capability of detecting H2S at concentrations ranging from 1 ppm to 30 ppm was tested. The superior gas-sensing performance of the PANI-AC composites can be attributed to the increased surface area of the materials, which provided increased active sites for doping processes and enhanced the sensing capability of the composites. Specifically, the incorporation of AC in the PANI matrix resulted in a substantial improvement in the doping process, which led to stronger gas-sensing responses with higher repeatability and higher stability toward H2S compared to the neat PANI-coated IDE sensor. Furthermore, the as-prepared IDE gas sensor exhibited the best sensing response toward H2S at 60% RH. The use of agricultural-waste coconut husk for the synthesis of these high-performance gas-sensing materials promotes sustainable and eco-friendly practices while improving the detection and monitoring of H2S gas in industrial settings.<\/jats:p>","DOI":"10.3390\/polym15234554","type":"journal-article","created":{"date-parts":[[2023,11,28]],"date-time":"2023-11-28T07:40:01Z","timestamp":1701157201000},"page":"4554","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Polyaniline Composites Containing Eco-Friendly Biomass Carbon from Agricultural-Waste Coconut Husk for Enhancing Gas Sensor Performance in Hydrogen Sulfide Detection"],"prefix":"10.3390","volume":"15","author":[{"given":"Kun-Hao","family":"Luo","sequence":"first","affiliation":[{"name":"Department of Chemistry, Chung Yuan Christian University, Chung Li District\u201a Taoyuan City 32023, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minsi","family":"Yan","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Chung Yuan Christian University, Chung Li District\u201a Taoyuan City 32023, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu-Han","family":"Hung","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Chung Yuan Christian University, Chung Li District\u201a Taoyuan City 32023, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jia-Yu","family":"Kuang","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Chung Yuan Christian University, Chung Li District\u201a Taoyuan City 32023, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hsing-Chih","family":"Chang","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Chung Yuan Christian University, Chung Li District\u201a Taoyuan City 32023, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying-Jang","family":"Lai","sequence":"additional","affiliation":[{"name":"Department of Food Science, National Quemoy University, Jinning Township, Kinmen County 89250, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2930-0405","authenticated-orcid":false,"given":"Jui-Ming","family":"Yeh","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Chung Yuan Christian University, Chung Li District\u201a Taoyuan City 32023, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,11,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"7595","DOI":"10.1021\/acsomega.2c07092","article-title":"Enhanced H2S Gas-Sensing Performance of Ni-Doped ZnO Nanowire Arrays","volume":"8","author":"Liu","year":"2023","journal-title":"ACS Omega"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"122539","DOI":"10.1016\/j.talanta.2021.122539","article-title":"A trace ppb-level electrochemical H2S sensor based on ultrathin Pt nanotubes","volume":"233","author":"Zuo","year":"2021","journal-title":"Talanta"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1130\/G50658.1","article-title":"Unravelling biotic versus abiotic processes in the development of large sulfuric-acid karsts","volume":"51","author":"Laurent","year":"2023","journal-title":"Geology"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"141493","DOI":"10.1016\/j.cej.2023.141493","article-title":"Establishing a Self-supporting System of H2S Production from SO2 with Induced Catalytic Reduction Process for Mercury Capture with Super-large Enrichment","volume":"459","author":"Sun","year":"2023","journal-title":"Chem. 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