QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature
Sensors based on nanocomposites of quantum dots (QDs) and wide-gap metal oxides are of exceptional interest for photoactivated detection of toxic and pollutant gases without thermal heating. However, the class of detecting gases has been limited almost exclusively to oxidizing gases like NO<sub&g...
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MDPI AG
2025-01-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/13/1/20 |
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| author | Maria Yu. Skrypnik Vadim B. Platonov Daria A. Kurtina Oleg G. Sinyashin Marina N. Rumyantseva Roman B. Vasiliev |
| author_facet | Maria Yu. Skrypnik Vadim B. Platonov Daria A. Kurtina Oleg G. Sinyashin Marina N. Rumyantseva Roman B. Vasiliev |
| author_sort | Maria Yu. Skrypnik |
| collection | DOAJ |
| description | Sensors based on nanocomposites of quantum dots (QDs) and wide-gap metal oxides are of exceptional interest for photoactivated detection of toxic and pollutant gases without thermal heating. However, the class of detecting gases has been limited almost exclusively to oxidizing gases like NO<sub>2</sub>. Here, we designed a photoactivated sensor for the selective detection of primary alcohols at room temperature using CdSe quantum dots coupled to a wide-gap SnO<sub>2</sub> semiconductor matrix. Our concept of the sensor operations is based on the photochemical reaction of primary alcohols via photoactivated QD-SnO<sub>2</sub> charge transfer and does not involve chemisorbed oxygen, which is traditional for the operation of metal oxide sensors. We demonstrated an efficient sensor response to C<sub>1</sub>–C<sub>4</sub> primary alcohols of ppm concentration under photoexcitation with a yellow LED in the absence of a signal from other volatile organic compounds (VOCs). We believe that proposed sensor concept opens up new ways to design photoactivated sensors without heating for the detection of VOCs. |
| format | Article |
| id | doaj-art-98dae18081dd40d5be4c79c0ec77c879 |
| institution | Kabale University |
| issn | 2227-9040 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj-art-98dae18081dd40d5be4c79c0ec77c8792025-01-24T13:26:55ZengMDPI AGChemosensors2227-90402025-01-011312010.3390/chemosensors13010020QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room TemperatureMaria Yu. Skrypnik0Vadim B. Platonov1Daria A. Kurtina2Oleg G. Sinyashin3Marina N. Rumyantseva4Roman B. Vasiliev5Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, 119991 Moscow, RussiaFederal Research Center Kazan Scientific Center RAS, 420111 Kazan, RussiaDepartment of Chemistry, Lomonosov Moscow State University, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, 119991 Moscow, RussiaSensors based on nanocomposites of quantum dots (QDs) and wide-gap metal oxides are of exceptional interest for photoactivated detection of toxic and pollutant gases without thermal heating. However, the class of detecting gases has been limited almost exclusively to oxidizing gases like NO<sub>2</sub>. Here, we designed a photoactivated sensor for the selective detection of primary alcohols at room temperature using CdSe quantum dots coupled to a wide-gap SnO<sub>2</sub> semiconductor matrix. Our concept of the sensor operations is based on the photochemical reaction of primary alcohols via photoactivated QD-SnO<sub>2</sub> charge transfer and does not involve chemisorbed oxygen, which is traditional for the operation of metal oxide sensors. We demonstrated an efficient sensor response to C<sub>1</sub>–C<sub>4</sub> primary alcohols of ppm concentration under photoexcitation with a yellow LED in the absence of a signal from other volatile organic compounds (VOCs). We believe that proposed sensor concept opens up new ways to design photoactivated sensors without heating for the detection of VOCs.https://www.mdpi.com/2227-9040/13/1/20room temperature gas sensorquantum dotsprimary alcoholsphotoactivationphotocatalysisselectivity |
| spellingShingle | Maria Yu. Skrypnik Vadim B. Platonov Daria A. Kurtina Oleg G. Sinyashin Marina N. Rumyantseva Roman B. Vasiliev QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature Chemosensors room temperature gas sensor quantum dots primary alcohols photoactivation photocatalysis selectivity |
| title | QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature |
| title_full | QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature |
| title_fullStr | QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature |
| title_full_unstemmed | QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature |
| title_short | QD/SnO<sub>2</sub> Photoactivated Chemoresistive Sensor for Selective Detection of Primary Alcohols at Room Temperature |
| title_sort | qd sno sub 2 sub photoactivated chemoresistive sensor for selective detection of primary alcohols at room temperature |
| topic | room temperature gas sensor quantum dots primary alcohols photoactivation photocatalysis selectivity |
| url | https://www.mdpi.com/2227-9040/13/1/20 |
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