Graphene-Modified ZnO Nanostructures for Low-Temperature NO2 Sensing
Qu, Geping; Fan, Guijun; Zhou, Moyan; Rong, Xiaoru; Li, Tao; Zhang, Rui; Sun, Jing; Chen, Deliang
Source PublicationACS OMEGA
AbstractThis paper develops a novel ultrasonic spray-assisted solvothermal (USS) method to synthesize wrapped ZnO/reduced graphene oxide (rGO) nanocomposites with a Schottky junction for gas-sensing applications. The as-obtained ZnO/rGO-x samples with different graphene oxide (GO) contents (x = 0-1.5 wt %) are characterized by various techniques, and their gas-sensing properties for NO2 and other VOC gases are also evaluated. The results show that the USS-derived ZnO/rGO samples exhibit high NO2-sensing property at low operating temperatures (e.g., 70-130 degrees C) because of their high specific surface area and porous structures when compared with the ZnO/rGO sample obtained by the traditional precipitation method. The content of rGO shows an obvious effect on their NO2-sensing properties, and the ZnO/rGO-0.5 sample has a high response of 62 operating at 130 degrees C, three times that of pure ZnO. The detection limit of the ZnO/rGO-0.5 sensor to NO2 is as low as 10 ppb under the present test condition. In addition, the ZnO/rGO-0.5 sensor shows a highly selective response to NO2 gas when compared with organic vapors and other inflammable or toxic gases. The theoretical and experimental analyses indicate that the enhancement in NO2-sensing performance of the ZnO/rGO sensor is attributed to the formation of wrapped ZnO/rGO Schottky junctions.
WOS Research AreaChemistry
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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GB/T 7714
Qu, Geping,Fan, Guijun,Zhou, Moyan,et al. Graphene-Modified ZnO Nanostructures for Low-Temperature NO2 Sensing[J]. ACS OMEGA,2019,4(2):4221.
APA Qu, Geping.,Fan, Guijun.,Zhou, Moyan.,Rong, Xiaoru.,Li, Tao.,...&Chen, Deliang.(2019).Graphene-Modified ZnO Nanostructures for Low-Temperature NO2 Sensing.ACS OMEGA,4(2),4221.
MLA Qu, Geping,et al."Graphene-Modified ZnO Nanostructures for Low-Temperature NO2 Sensing".ACS OMEGA 4.2(2019):4221.
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