ZnO hierarchical 3D-flower like architectures and their gas sensing properties at room temperature

• DOI: 10.1016/j.apsusc.2018.01.199
• Publication Date: 2018-02-08T20:30:01Z
• Authors: R. Sankar Ganesh; Ganesh Kumar Mani; R. Elayaraja; E. Durgadevi; M. Navaneethan; S. Ponnusamy; K. Tsuchiya; C. Muthamizhchelvan; Y. Hayakawa
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract 3D-flower like morphology was successfully synthesized by simple hydrothermal method without using any capping agents and surfactants. FE-SEM and TEM showed flower-like morphology composed of numerous sheets with decorated nanoparticles. Nanosheets assembled petal of the flower with an average thickness of ∼10 nm. Ammonia (NH3) gas sensing analysis revealed that ZnO nanoflower (synthesized with a zinc nitrate and NaOH precursor ratio of 0.1:0.15) showed higher gas response compared with other ZnO nanoflowers synthesized using different precursor ratio. ZnO nanoflower possessed good response (45 s) and recovery time (17 s) at room temperature.