{"title":"火焰喷雾热解制备Pt-PtO功能化WO3纳米结构对甲基硫醇的选择性","authors":"Kanittha Inyawilert , Matawee Punginsang , Chonlada Dechakiatkrai Theerakarunwong , Anurat Wisitsoraat , Chaikarn Liewhiran","doi":"10.1016/j.talo.2025.100464","DOIUrl":null,"url":null,"abstract":"<div><div>This work presented 0–1 wt% Pt-PtO functionalized WO<sub>3</sub> nanostructures synthesized by flame spray pyrolysis (FSP) for methyl mercaptan (CH<sub>3</sub>SH)-sensing applications. According to electron microscopic and X-ray spectroscopic analysis, 1–3 nm Pt-PtO core-shell nanoparticles were decorated on 5–20 nm primary monoclinic WO<sub>3</sub> nanoparticles. The gas-sensing data revealed that Pt-PtO loading with an optimum Pt content of 0.5 wt% provided a remarkably enhanced CH<sub>3</sub>SH response of 204 to 500 ppb CH<sub>3</sub>SH at the best sensing temperature of 250°C with a low detection limit of 26 ppb and high CH<sub>3</sub>SH selectivity relative to (CH<sub>3</sub>)<sub>2</sub>S, H<sub>2</sub>S, CH<sub>3</sub>OH, C<sub>2</sub>H<sub>5</sub>OH, C<sub>3</sub>H<sub>6</sub>O, NH<sub>3</sub>, NO<sub>2</sub>, H<sub>2</sub>, CH<sub>4</sub>, C<sub>2</sub>H<sub>2</sub> and short-chain fatty acids (SCFAs) including CH<sub>3</sub>COOH, C<sub>2</sub>H<sub>5</sub>COOH, C<sub>3</sub>H<sub>7</sub>COOH. Therefore, the flame-synthesized Pt-PtO functionalized WO<sub>3</sub> nanosensors could be potential for CH<sub>3</sub>SH detection at ppb levels in the medical applications particularly noninvasive breath diagnosis of halitosis and serious infection of periodontitis.</div></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"11 ","pages":"Article 100464"},"PeriodicalIF":4.1000,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Selectivity towards methyl mercaptan of Pt-PtO functionalized WO3 nanostructures made by flame spray pyrolysis\",\"authors\":\"Kanittha Inyawilert , Matawee Punginsang , Chonlada Dechakiatkrai Theerakarunwong , Anurat Wisitsoraat , Chaikarn Liewhiran\",\"doi\":\"10.1016/j.talo.2025.100464\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This work presented 0–1 wt% Pt-PtO functionalized WO<sub>3</sub> nanostructures synthesized by flame spray pyrolysis (FSP) for methyl mercaptan (CH<sub>3</sub>SH)-sensing applications. According to electron microscopic and X-ray spectroscopic analysis, 1–3 nm Pt-PtO core-shell nanoparticles were decorated on 5–20 nm primary monoclinic WO<sub>3</sub> nanoparticles. The gas-sensing data revealed that Pt-PtO loading with an optimum Pt content of 0.5 wt% provided a remarkably enhanced CH<sub>3</sub>SH response of 204 to 500 ppb CH<sub>3</sub>SH at the best sensing temperature of 250°C with a low detection limit of 26 ppb and high CH<sub>3</sub>SH selectivity relative to (CH<sub>3</sub>)<sub>2</sub>S, H<sub>2</sub>S, CH<sub>3</sub>OH, C<sub>2</sub>H<sub>5</sub>OH, C<sub>3</sub>H<sub>6</sub>O, NH<sub>3</sub>, NO<sub>2</sub>, H<sub>2</sub>, CH<sub>4</sub>, C<sub>2</sub>H<sub>2</sub> and short-chain fatty acids (SCFAs) including CH<sub>3</sub>COOH, C<sub>2</sub>H<sub>5</sub>COOH, C<sub>3</sub>H<sub>7</sub>COOH. Therefore, the flame-synthesized Pt-PtO functionalized WO<sub>3</sub> nanosensors could be potential for CH<sub>3</sub>SH detection at ppb levels in the medical applications particularly noninvasive breath diagnosis of halitosis and serious infection of periodontitis.</div></div>\",\"PeriodicalId\":436,\"journal\":{\"name\":\"Talanta Open\",\"volume\":\"11 \",\"pages\":\"Article 100464\"},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2025-04-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Talanta Open\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666831925000669\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Talanta Open","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666831925000669","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
Selectivity towards methyl mercaptan of Pt-PtO functionalized WO3 nanostructures made by flame spray pyrolysis
This work presented 0–1 wt% Pt-PtO functionalized WO3 nanostructures synthesized by flame spray pyrolysis (FSP) for methyl mercaptan (CH3SH)-sensing applications. According to electron microscopic and X-ray spectroscopic analysis, 1–3 nm Pt-PtO core-shell nanoparticles were decorated on 5–20 nm primary monoclinic WO3 nanoparticles. The gas-sensing data revealed that Pt-PtO loading with an optimum Pt content of 0.5 wt% provided a remarkably enhanced CH3SH response of 204 to 500 ppb CH3SH at the best sensing temperature of 250°C with a low detection limit of 26 ppb and high CH3SH selectivity relative to (CH3)2S, H2S, CH3OH, C2H5OH, C3H6O, NH3, NO2, H2, CH4, C2H2 and short-chain fatty acids (SCFAs) including CH3COOH, C2H5COOH, C3H7COOH. Therefore, the flame-synthesized Pt-PtO functionalized WO3 nanosensors could be potential for CH3SH detection at ppb levels in the medical applications particularly noninvasive breath diagnosis of halitosis and serious infection of periodontitis.
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