Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde
This study presents a type of silica-composite sensor fabricated by entrapping Nash reagent into a sol silica and ordered porous-silica mixture, integrated with a commercial polyester sheet, for the selective detection of airborne formaldehyde using smartphone-based colorimetry. After mild storage a...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-06-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025015695 |
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| author | Nhat-Truong Truong Phuoc-Tri Mai Minh-Kha Nguyen Dung Van Nguyen Long Quang Nguyen Tuyet-Mai Tran-Thuy |
| author_facet | Nhat-Truong Truong Phuoc-Tri Mai Minh-Kha Nguyen Dung Van Nguyen Long Quang Nguyen Tuyet-Mai Tran-Thuy |
| author_sort | Nhat-Truong Truong |
| collection | DOAJ |
| description | This study presents a type of silica-composite sensor fabricated by entrapping Nash reagent into a sol silica and ordered porous-silica mixture, integrated with a commercial polyester sheet, for the selective detection of airborne formaldehyde using smartphone-based colorimetry. After mild storage at 4 °C for up to 10 weeks, the as-fabricated silica-composite sensors remain durable performance in discrimination of airborne formaldehyde sensing within 10 min of exposure. The yellow coloration of 3,5-diacetyl-dihydrolutidine in the formaldehyde-exposed composite sensor could stabilize during two weeks of testing at 4 °C. Furthermore, the limit of detection and limit of quantification are 0.434 and 1.334 ppmv HCHO, respectively, achieved with Snolore approach. This achievement offers soft fabrication and storage conditions, along with portability, reliability and stable performance of the silica-composite sensor, addressing health concerns regarding indoor airborne formaldehyde through the development of ready-to-use detectors. |
| format | Article |
| id | doaj-art-f2e9a78ed95e4da3ab859bdfd22879de |
| institution | DOAJ |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-f2e9a78ed95e4da3ab859bdfd22879de2025-08-20T03:18:27ZengElsevierResults in Engineering2590-12302025-06-012610549910.1016/j.rineng.2025.105499Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehydeNhat-Truong Truong0Phuoc-Tri Mai1Minh-Kha Nguyen2Dung Van Nguyen3Long Quang Nguyen4Tuyet-Mai Tran-Thuy5Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, , Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, VietnamFaculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, , Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, VietnamFaculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, , Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, VietnamFaculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, , Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, VietnamFaculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, , Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, VietnamFaculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, , Vietnam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam; Corresponding author.This study presents a type of silica-composite sensor fabricated by entrapping Nash reagent into a sol silica and ordered porous-silica mixture, integrated with a commercial polyester sheet, for the selective detection of airborne formaldehyde using smartphone-based colorimetry. After mild storage at 4 °C for up to 10 weeks, the as-fabricated silica-composite sensors remain durable performance in discrimination of airborne formaldehyde sensing within 10 min of exposure. The yellow coloration of 3,5-diacetyl-dihydrolutidine in the formaldehyde-exposed composite sensor could stabilize during two weeks of testing at 4 °C. Furthermore, the limit of detection and limit of quantification are 0.434 and 1.334 ppmv HCHO, respectively, achieved with Snolore approach. This achievement offers soft fabrication and storage conditions, along with portability, reliability and stable performance of the silica-composite sensor, addressing health concerns regarding indoor airborne formaldehyde through the development of ready-to-use detectors.http://www.sciencedirect.com/science/article/pii/S2590123025015695FormaldehydeSmartphone-based colorimetric sensorSol silica, silica-composite sheetAirborne pollutants |
| spellingShingle | Nhat-Truong Truong Phuoc-Tri Mai Minh-Kha Nguyen Dung Van Nguyen Long Quang Nguyen Tuyet-Mai Tran-Thuy Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde Results in Engineering Formaldehyde Smartphone-based colorimetric sensor Sol silica, silica-composite sheet Airborne pollutants |
| title | Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde |
| title_full | Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde |
| title_fullStr | Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde |
| title_full_unstemmed | Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde |
| title_short | Long-term stability of silica-composite sheet for smartphone-based colorimetric sensor in discrimination of airborne formaldehyde |
| title_sort | long term stability of silica composite sheet for smartphone based colorimetric sensor in discrimination of airborne formaldehyde |
| topic | Formaldehyde Smartphone-based colorimetric sensor Sol silica, silica-composite sheet Airborne pollutants |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025015695 |
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