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. 2019 Jan 3;186(1):44.
doi: 10.1007/s00604-018-3108-8.

Manganese-doped zinc oxide hollow balls for chemiresistive sensing of acetone vapors

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Manganese-doped zinc oxide hollow balls for chemiresistive sensing of acetone vapors

Dongting Wang et al. Mikrochim Acta. .

Abstract

Both pure and Mn(II)-doped ZnO hollow structures were synthesized by a solvothermal reaction, and their phase structures, morphologies and elemental composition were characterized. SEM and TEM observations show the pure ZnO and the Mn(II)-doped ZnO balls to possess similar hollow structure with a particle size of about 1.5 μm. Their sensing properties were investigated, and the composite containing 1 atom% of Mn(II) (1% Mn-ZnO) is found be display the highest selectivity for acetone. The detection limit is 100 ppm acetone at 234 °C which is 4.6 times lower than that of the pure ZnO. In addition, the response time is shorter. Graphical abstract ZnO and Mn-doped ZnO hollow balls were prepared by a hydrothermal method, and their gas-sensing properties were investigated. Zinc(II) oxide doped with 1 atom% Mn(II) demonstrated an outstanding sensing behavior towards acetone vapors.

Keywords: Acetone vapors; Gas sensor; Hollow balls; Mn-doped ZnO; ZnO.

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