Preferential growth of long ZnO nanowires and its application in gas sensor

A high response butanol gas sensor based on ZnO hollow spheres

“…The present results imply the potentialities of using ZnO hollow spheres for detecting n-butanol gas. ZnO nanoflakes [11] 500 330 87 --ZnO nanowires [7] Au/ZnO nanowires [7] 100 320 9.1 18.2 ----ZnO microflowers [20] 100 320 24.1 --ZnO/-Fe2O3 nanorods [10] 100 225 54.4 55 26…”

“…As a practical gas sensor, the ratio is usually more than or equal to 3. For now, there are many monitoring methods in the detections of VOCs, in which the semiconducting metal oxides such as SnO2 [6], ZnO [7], WO3 [8], NiO [9], and ZnO/-Fe2O3 nanorods [10] based gas sensors are thought to be the most reliable and standard method for detecting n-butanol due to their advanced properties and low cost.…”

“…Meanwhile, the varied morphology and impurity-doping are seen as two effective ways to significantly increase the gas sensing properties of ZnO [19]. So far, a variety of ZnO nanostructures with different dominant surfaces and ZnO based composite have been used as gas sensing material to detect n-butanol, including ZnO nanoflowers [20,21], ZnO nanowires [7], porous ZnO nanoflakes [11], Fe-doped ZnO [19], -Fe2O3-ZnO-Au nanocomposites [22], etc. Despite some efforts, the properties of them including gas response, selectivity and stability are still not ideal.…”

Flower-like hierarchical structures consisting of porous single-crystalline ZnO nanosheets and their gas sensing properties to volatile organic compounds (VOCs)

“…As one of the most popular metal oxide sensing materials, ZnO has been widely investigated in past decades because of its excellent electronic and photonic properties [10][11][12]. Various ZnO nanostructures such as nanowires [13][14][15], nanorods [16][17][18], nanosheets [19] and nanospheres [20] have been developed to improve the gas sensing performance. In particular, porous single-crystalline ZnO nanosheets (PSCZNs) have been synthesized which not only exhibited highly sensitive performance but also possessed significantly long term stability [21].…”

Catalysis-Based Cataluminescent and Conductometric Gas Sensors: Sensing Nanomaterials, Mechanism, Applications and Perspectives

“…As one of the most popular sensing metal oxides, ZnO has been investigated in the past decades because of its excellent electronic and optical properties [74,75]. Various ZnO nanostructures such as nanowires [76][77][78], nanorods [79,80], nanosheets [81] and nanospheres [82] have been developed. In particular, porous single-crystalline ZnO nanosheets have been synthesized, which not only exhibit highly sensitive performance but also possess significantly long-term stability.…”