Yiping Wang, Jun Cao*, Jiaxin Zhang, Xilian Cao, Hong Yao and Ronghui Que*,
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引用次数: 0
Abstract
This lab activity explored the overlooked process of the silver mirror reaction by conducting experiments at both macro and nano scale. At the macro scale, laser irradiation on a reaction container revealed a gradually noticeable Tyndall effect. At the nano scale, silver nanoparticles (AgNPs) were collected at different periods during the reaction and characterized using UV–vis spectrometer and transmission electron microscopy (TEM). The UV–vis spectra exhibited a red-shift trend between characteristic wavelengths of AgNPs, and an increase in the absorption peak as time progressed. Additionally, TEM images and particle sizes revealed a gradual increase in the average diameter of AgNPs. These experimental facts verify the colloidal process in the silver mirror reaction. This lab activity was carried out by a group of students majoring in chemistry at Anhui Normal University. Satisfactory teaching effects have been achieved.
期刊介绍：
The Journal of Chemical Education is the official journal of the Division of Chemical Education of the American Chemical Society, co-published with the American Chemical Society Publications Division. Launched in 1924, the Journal of Chemical Education is the world’s premier chemical education journal. The Journal publishes peer-reviewed articles and related information as a resource to those in the field of chemical education and to those institutions that serve them. JCE typically addresses chemical content, activities, laboratory experiments, instructional methods, and pedagogies. The Journal serves as a means of communication among people across the world who are interested in the teaching and learning of chemistry. This includes instructors of chemistry from middle school through graduate school, professional staff who support these teaching activities, as well as some scientists in commerce, industry, and government.
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