|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Room temperature formaldehyde sensing of hollow SnO2/ZnO heterojunctions under UV-LED Activationстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 сентября 2019 г.
- Авторы: Lijia Zhao, Yupeng Chen, Xinyu Li, Xiaogan Li, Shiwei Lin, Tie Li, Rumyantseva Marina N., Gaskov Alexander M.
- Журнал: IEEE Sensors Journal
- Том: 19
- Номер: 17
- Год издания: 2019
- Издательство: Institute of Electrical and Electronics Engineers
- Местоположение издательства: Piscataway, NJ, United States
- Первая страница: 7207
- Последняя страница: 7214
- DOI: 10.1109/JSEN.2019.2916879
- Аннотация: The room temperature gas sensing properties of the hollow SnO2/ZnO heterojunction based chemiresistive sensors under Ultraviolet (UV) radiation were investigated. The hollow SnO2/ZnO heterojunctions were fabricated using the template-assisted process followed with a hydrothermal treatment. The sensor using this core-shell SnO2/ZnO heterojunctions showed a much higher response to formaldehyde under UV illumination compared to that without UV. Moreover, the response of this hollow heterojunctions based sensor to formaldehyde is higher than the respective pure SnO2 and ZnO hollow microspheres based sensors under same conditions indicating the “synthetic effect” of the formed heterojunctions on the enhanced sensitivity. More strikingly, the response of the SnO2/ZnO heterojunctions based sensors showed a much smaller response to ethanol, methanol and toluene indicating an excellent selectivity whereas there is a large influence from ethanol if the sensor worked under the conventional heating method. It could be attributed to the lower oxidizing ability of the adsorbed, ionized oxygen with a negative monovalence on the oxide surface and thus a selective photo-catalytic conversion of formaldehyde over the other possible interferents. The long-term stability of the sensor operated under UV light was also studied.
- Добавил в систему: Румянцева Марина Николаевна