20.500.12556/DiRROS-16904 Colorimetric cutoff indication of relative humidity based on selectively functionalized mesoporous silica We present a novel % cutoff concept of colorimetric indication of relative humidity based on dye dissolution in condensed water in capillaries of selectively functionalized mesoporours host SiO2 material. Consistently high levels of indoor air humidity induces mold and algae growth which represent a potential risks for human health and have deteriorating effect on walls as well. Simple localized humidity detection of high humidity with naked eye especially at places with low air circulation, where growth of mold usually starts first, is therefore highly desirable. The reporting dye was integrated in the non-functionalized mesoporous silica matrix with different pore diameters and selective-functionalized mesoporous silica material. After exposure to the environment of different air humidities the dye dissolved in water causing color change of adsorbent. With the use of adsorbents with different mesopore diameters high ability to tune the value of relative humidity when complete capillary condensation occurred was achieved. Materials with pore diameters of 3.0%nm, 3.5%nm and 7.0%nm exhibit gradual color change when reaching relative humidity up to 55, 79 and 88 RH% respectively. After selective methylation of the material with 7.0%nm pore diameter, non-gradual cutoff color change was achieved. Sample exhibited color change at narrow range of relative humidity (cutoff color change). Due to selective functionalized outer surface the dye dissolution occur only in condensed water in pores and therefore provide colorimetric indication only in this range. Selectively modified silica material has a great potential for a straightforward detection of high humid environment. turn-on colorimetric probe selective functionalization mesoporous silica relative humidity capillary condensation kolorimetrični sistem za indikacijo selektivna funkcionalizacija mezoporozen silicijev dioksid relativna vlažnost kapilarna kondenzacija true false true Elsevier B.V. Angleški jezik Slovenski jezik © 2020 The Author(s). Published by Elsevier B.V. Neznano 2023-09-05 08:20:38 2023-09-05 08:32:13 2023-09-06 03:35:35 0000-00-00 00:00:00 2020 0 0 Dostopen na spletu: 19 April 2020, 128138; Št. članka: 128138; str. 1-11 Vol. 316 1 Aug. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-04-19 620.1/.2 0925-4005 10.1016/j.snb.2020.128138 2570599 https://www.sciencedirect.com/science/article/pii/S0925400520304883?via%3Dihub Open access 1 92d6f646-4ba3-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22970 RAZ_Svara_Fabjan_Erika_2020.pdf RAZ_Svara_Fabjan_Erika_2020.pdf 1 805C8C596403B96790C09F5624F8961D 77888c88dbd8895bbab2f9833f46095cbdba56acf96284cdd29b82031f3def94 1bba218e-4ba5-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22971 RAZ_Svara_Fabjan_Erika_2020.docx RAZ_Svara_Fabjan_Erika_2020.docx 1 F782814D252129830B5457BF1543303F 2f552c535ab626377ed6a8e15ab58ad1e20c0c56403aa9d31e9ff6f2b020056a 27f6f41b-4ba5-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22972 Zavod za gradbeništvo Slovenije 0 0 0