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- W2011736459 abstract "Hierarchical nanostructured ZnO dandelion-like spheres were synthesized via solvothermal reaction at 200 °C for 4 h. The products were pure hexagonal ZnO with large exposure of (0 0 2) polar facet. Side-heating gas sensor based on hierarchical ZnO spheres was prepared to evaluate the acetone gas sensing properties. The detection limit to acetone for the ZnO sensor is 0.25 ppm. The response (Ra/Rg) toward 100 ppm acetone was 33 operated at 230 °C and the response time was as short as 3 s. The sensor exhibited remarkable acetone selectivity with negligible response toward other hazardous gases and water vapor. The high proportion of electron depletion region and oxygen vacancies contributed to high gas response sensitivity. The hollow and porous structure of dandelion-like ZnO spheres facilitated the diffusion of gas molecules, leading to a rapid response speed. The largely exposed (0 0 2) polar facets could adsorb acetone gas molecules easily and efficiently, resulting in a rapid response speed and good selectivity of hierarchical ZnO spheres gas sensor at low operating temperature." @default.
- W2011736459 created "2016-06-24" @default.
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- W2011736459 date "2014-07-01" @default.
- W2011736459 modified "2023-10-04" @default.
- W2011736459 title "Rapid and selective detection of acetone using hierarchical ZnO gas sensor for hazardous odor markers application" @default.
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- W2011736459 doi "https://doi.org/10.1016/j.jhazmat.2014.05.044" @default.
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