ZnO coral-like nanoplates decorated with Pd nanoparticles for enhanced VOC gas sensing

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Chu Manh, HungInternational Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 – Dai Co Viet Street, Hanoi, Viet Nam (author)

ZnO coral-like nanoplates decorated with Pd nanoparticles for enhanced VOC gas sensing

Article/chapterEnglish2021

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Hanoi, Vietnam :Elsevier,2021
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LIBRIS-ID:oai:DiVA.org:uu-450038
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-450038URI
https://doi.org/10.1016/j.jsamd.2021.05.005DOI

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Language:English
Summary in:English

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A high working temperature of the ZnO nanomaterial-based gas sensor could shorten the lifetime of the sensor and increase its power consumption. Enhancing the volatile organic compound (VOC) sensing performance of ZnO nanomaterial-based gas sensors in terms of gas response and temperature is vital for their practical application. Decoration of noble metals onto nanostructures is an effective approach for improving their sensing characteristics. Herein, hydrothermally synthesized ZnO coral-like nanoplates decorated with Pd nanoparticles are introduced to achieve the improved VOC sensing performance. The morphology, crystal structure, composition, atomic structure, and gas sensing properties of the synthesized pristine and Pd–ZnO coral-like nanoplates were investigated. The results showed a remarkable reduction of optimal working temperature from 450 °C for the pristine ZnO based sensor to 350 °C for the Pd–ZnO based sensor. The sensor response to acetone at the optimal operating temperature of 350 °C was improved three times by surface decoration with Pd nanoparticles. The response time and recovery time of the Pd–ZnO sensor were about three times faster than that of the pristine ZnO sensor. The Pd–ZnO sensor reached a theoretical detection limit of 17 ppt and a sensitivity of 3.5–2.5 ppm acetone at 350 °C. The sensor transient stability after several on/off switching cycles from air to gas revealed the effective reusability of the fabricated devices. A plausible mechanism for the VOC sensing of the porous Pd–ZnO coral-like nanoplate-based sensor is also discussed.

Subject headings and genre

Gas sensor
Pd nanoparticles
Porous ZnO coral-like nanoplates
Sensing mechanism
Teknisk fysik med inriktning mot materialvetenskap
Engineering Science with specialization in Materials Science

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Lai Van, DuyInternational Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 – Dai Co Viet Street, Hanoi, Viet Nam (author)
Dang Thi Thanh, LeInternational Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 – Dai Co Viet Street, Hanoi, Viet Nam (author)
Nguyen, Hugo,1955-Uppsala universitet,Institutionen för materialvetenskap,Mikrosystemteknik (author)
Duy, Nguyen VanInternational Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 – Dai Co Viet Street, Hanoi, Viet Nam,ITIMS (author)
Nguyen Duc, HoaInternational Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 – Dai Co Viet Street, Hanoi, Viet Nam,ITIMS (author)
International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No 1 – Dai Co Viet Street, Hanoi, Viet NamInstitutionen för materialvetenskap (creator_code:org_t)

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In:Journal of Science: Advanced Materials and DevicesHanoi, Vietnam : Elsevier6:3, s. 453-4612468-22842468-2179

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By the author/editor: Chu Manh, Hung; Lai Van, Duy; Dang Thi Thanh, ...; Nguyen, Hugo, 19 ...; Duy, Nguyen Van; Nguyen Duc, Hoa

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