In situ thermo‐TOF‐SIMS study of thermal decomposition of zinc acetate dihydrate
2004; Wiley; Volume: 39; Issue: 10 Linguagem: Inglês
10.1002/jms.721
ISSN1096-9888
AutoresAnil V. Ghule, Kalyani Ghule, Chin‐Yuan Chen, Wen‐Yin Chen, Shin‐Hwa Tzing, Hua Chang, Yong‐Chien Ling,
Tópico(s)Mercury impact and mitigation studies
ResumoAbstract Time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS) was used for an in situ thermal decomposition study of Zn(CH 3 COO) 2 ·2H 2 O forming ZnO nanoparticles. TOF‐SIMS spectra were recorded at regular temperature intervals of 25 °C in positive and negative detection modes in a dynamic thermal process. Controlled heating (5 °C min −1 ) of Zn(CH 3 COO) 2 ·2H 2 O was also carried out using thermogravimetric analysis (TGA) in an oxygen atmosphere (20 ml min −1 ). Nearly spherical ZnO nanoparticles with no agglomeration and a narrow size distribution (diameter ∼50 nm) were observed, which were characterized using scanning electron microscopy, transmission electron microscopy and x‐ray diffraction. In situ thermo‐TOF‐SIMS was used to monitor the 64 Zn + and 66 Zn + ion abundances as a function of temperature, which showed a similar profile to that observed for weight loss in TGA during decomposition. Based on the experimental results, a possible decomposition mechanism for the formation of ZnO is proposed. Copyright © 2004 John Wiley & Sons, Ltd.
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