Hydrothermal synthesis of ternary α-Fe2O3–ZnO–Au nanocomposites with high gas-sensing performance

Detection of hazardous volatile organic compounds (VOCs) by metal oxide nanostructures-based gas sensors: A review

“…Kaneti et al [135] reported a series α-Fe 2 O 3 based materials as an n-butanol sensors. The ternary α-Fe 2 O 3 -ZnO-Au nanocomposites were found to show higher responses (R a /R g ) of 113 towards 100 ppm n-butanol compared to single α- Huang et al [115] reported large-scale flowerlike ZnO nanostructure using a very simple solution method at near room temperature.…”

A high response butanol gas sensor based on ZnO hollow spheres

“…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.…”

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

“…The differences between the results listed in Table 3 can be due to the different factors such as the growth or preparation method and conditions, substrate, thickness, and electrode which in turn affect the crystallinity, porosity, surface morphology, as well as sensing mechanism. In addition to pure ZnO, there are many reports on acetone vapor sensitivity of other metal oxide semiconductors such as WO 3 [22], a-Fe 2 O 3 [23], In 2 O 3 [24], SnO 2 [25], and Fe 2 O 4 [26] as well as doped-ZnO [18,27,28], and a summary of their results is listed in Table 4. From the results given in this work and Tables 3 and 4, it may be also deduced that ZnO is suitable to detect acetone vapor compared to the other metal oxide semiconductors.…”