{"title":"Measurement of Specific Surface Area of Silica Gel Using a Paper-Based Microscale Laboratory","authors":"Yifei Chen, Manbin Lin and Longfei Cai*, ","doi":"10.1021/acs.jchemed.4c0135510.1021/acs.jchemed.4c01355","DOIUrl":null,"url":null,"abstract":"<p >We describe the measurement of the specific surface area of silica gel via solution adsorption method using paper-based microscale laboratory. The students utilized microfluidic paper-based analytical devices, plotted a calibration graph, and quantified the methylene blue content after adsorption by silica gel. This experiment has the advantages of low cost, fast speed, easy operation, and environmental friendliness compared to using a UV–visible spectrophotometer to determine the specific surface area. A total of 108 students majoring in chemical education participated in this practice in the sixth semester, and all students completed the experiment within 3 h. Of the total number of students participating, 85.2% of participants obtained a specific surface value with a relative error < 30%, and 94.4% of them obtained a calibration curve with a determination coefficient > 0.96. The study demonstrates the feasibility of adopting this modified laboratory experiment in physical chemistry teaching laboratories. The students′ responses to a questionnaire and their experimental reports indicated a high degree of student satisfaction, interest, and skill development after performing this experiment.</p>","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"102 2","pages":"957–961 957–961"},"PeriodicalIF":2.5000,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Education","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.jchemed.4c01355","RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
We describe the measurement of the specific surface area of silica gel via solution adsorption method using paper-based microscale laboratory. The students utilized microfluidic paper-based analytical devices, plotted a calibration graph, and quantified the methylene blue content after adsorption by silica gel. This experiment has the advantages of low cost, fast speed, easy operation, and environmental friendliness compared to using a UV–visible spectrophotometer to determine the specific surface area. A total of 108 students majoring in chemical education participated in this practice in the sixth semester, and all students completed the experiment within 3 h. Of the total number of students participating, 85.2% of participants obtained a specific surface value with a relative error < 30%, and 94.4% of them obtained a calibration curve with a determination coefficient > 0.96. The study demonstrates the feasibility of adopting this modified laboratory experiment in physical chemistry teaching laboratories. The students′ responses to a questionnaire and their experimental reports indicated a high degree of student satisfaction, interest, and skill development after performing this experiment.
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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