Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 27, Pages 24757-24763Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b06701
Keywords
gas sensor; ZnO; GO; ultrathin nanosheets; porous; oxygen vacancy; acetylacetone
Funding
- Distinguished Taishan Scholars in Climbing Plan [tspd20161006]
- Shandong Provincial Natural Science Foundation [ZR2019MEM049]
- Natural Science Foundation of China [51772167]
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In this study, porous ZnO ultrathin nanosheets with abundant surface oxygen vacancies were prepared by a hydrothermal technique followed by an annealing method using graphene oxide (GO) as a template. The high specific surface area of GO with ultrathin thickness provided an important template for the ZnO ultrathin nanosheets. The as-prepared porous ZnO ultrathin nanosheets exhibited superior acetylacetone sensing performance. The sensor response of the porous ZnO ultrathin nanosheets was 191.1 for 100 ppm acetylacetone, which was approximately 4 times higher than that of ZnO clusters (prepared without GO template) at 340 degrees C. The porous ZnO ultrathin nanosheets also exhibited excellent selectivity and operational stability. The excellent gas sensing performance of the porous ZnO ultrathin nanosheets was due to their high specific surface area (130.5 m(2)/g) and abundant surface oxygen vacancy.
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