Tuning the Morphology of ZnO Nanostructures with the Ultrasonic Spray Pyrolysis Process

Metals

Gözde Alkan¹  Darja Jenko¹  Elif Emil²  Rebeka Rudolf²  Bernd Friedrich³  Sebahattin Gurmen⁴ 

[1] Materials Eng., Istanbul Technical University, 34469 Istanbul, Turkey;;Department of Metallurgical &Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia;IME Institute of Process Metallurgy and Metal Recycling, RWTH Aachen University, Intzestrasse 3, 52056 Aachen, Germany;

关键词: ZnO;    ultrasonic spray pyrolysis;    influential parameters;    formation mechanism;    structure;    morphologies;    characterization;    TEM;    HRTEM;   

DOI  :  10.3390/met8080569

来源: DOAJ

【 摘 要 】

Nanostructured zinc oxide (ZnO) particles were synthesized by the one step Ultrasonic Spray Pyrolysis (USP) process from nitrate salt solution (Zn(NO3)2·6H2O). Various influential parameters, from Zn(NO3)2·6H2O concentrations (0.01875–0.0375 M) in the initial solution, carrier gas (N2) flow rates (0.5–0.75 L/min) to reaction temperature (400–800 °C), were tested to investigate their role on the final ZnO particles’ morphology. For this purpose, Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM) and (Selected Area Electron Diffraction) SAED techniques were used to gain insight into how the ZnO morphology is dependent on the USP process. It was revealed that, by certain parameter selection, different ZnO morphology could be achieved, from spherical to sphere-like structures assembled by interwoven nanoplate and nanoplate ZnO particles. Further, a more detailed crystallographic investigation was performed by XRD and Williamson-Hall (W-H) analysis on the ZnO with unique and non-typical planar morphology that was not reported before by USP synthesis. Moreover, for the first time, a flexible USP formation model was proposed, ending up in various ZnO morphologies rather than only ideal spheres, which is highly promising to target a wide application area.

【 授权许可】

Unknown