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ERIC Number: EJ824966
Record Type: Journal
Publication Date: 2008-Feb
Pages: 3
Abstractor: As Provided
Reference Count: 12
ISBN: N/A
ISSN: ISSN-0021-9584
ATR-FTIR Spectroscopy in the Undergraduate Chemistry Laboratory: Part II--A Physical Chemistry Laboratory Experiment on Surface Adsorption
Schuttlefield, Jennifer D.; Larsen, Sarah C.; Grassian, Vicki H.
Journal of Chemical Education, v85 n2 p282-284 Feb 2008
Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy is a useful technique for measuring the infrared spectra of solids and liquids as well as probing adsorption on particle surfaces. The use of FTIR-ATR spectroscopy in organic and inorganic chemistry laboratory courses as well as in undergraduate research was presented in Part I as well as background information and the fundamentals of the ATR-FTIR technique. In Part II, the use of ATR-FTIR spectroscopy in the upper-level physical chemistry laboratories is discussed. A new experiment involving the adsorption of ions from solution onto oxide particle surfaces is introduced. In this laboratory experiment, students use ATR-FTIR spectroscopy to determine the Langmuir adsorption constant, K[subscript ads], for sulfate ion adsorbed on 2 particles at pH = 3. A thin film of oxide particles deposited onto the ZnSe ATR element is exposed to solutions of different sulfate concentrations. The infrared spectrum of adsorbed sulfate can be measured in this way. This experiment, which can be easily implemented into an upper-level chemistry curriculum, introduces students to several concepts including surface adsorption, oxide surface chemistry, and environmental interfacial processes. [For Part I, see EJ824965.] (Contains 2 figures.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail: jchemed@egpp.com; Web site: http://www.jce.divched.org
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: Students; Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A