ERIC Number: EJ1442059
Record Type: Journal
Publication Date: 2022-Jun
Pages: 7
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: EISSN-1938-1328
Available Date: N/A
Synthesis, Characterization, and Evaluation of Metal-Organic Frameworks for Water Decontamination: An Integrated Experiment
Celia Todd; Carlos Melchor Ceballos; Monica C. So
Journal of Chemical Education, v99 n6 p2392-2398 2022
An integrated laboratory experience using metal--organic frameworks (MOFs), a nanoporous and crystalline extended solid material composed of metal cations and organic linkers, was developed and adopted for upper-division, major-level chemistry and biochemistry students. In this laboratory, students were guided through the facile solvothermal synthesis of four MOFs: UiO-66, UiO-66-NH[subscript 2], ZIF-8, and ZIF-67. Characterization, specifically powder X-ray diffraction (PXRD), and energy-dispersive X-ray spectroscopy (EDXS) were used to evaluate the crystallinity, morphology, and composition of the MOFs, respectively. Students then investigated the effects of measurement conditions (MOF dosage, MOF surface charge, and charge density of dye counterions) on the removal of dyes from aqueous solutions using the synthesized MOFs. Through the utilization of Fourier-transform infrared spectroscopy (FT-IR) and UV-vis spectroscopy, students confirmed the binding of dyes and quantified the amounts of dye removed from solution. Students found that all four porous and crystalline MOFs removed acid orange 7 and malachite green from water, but ZIF-67 exhibited the highest adsorption capacity of 30 mg of acid orange 7 per gram of ZIF-67 at a dosage of 5 mg. This laboratory experience allows students to apply and connect concepts found in general, organic, inorganic, and physical chemistry while simultaneously getting introduced to various instrumentation and lab techniques within a growing field in materials chemistry. Exposure to this field can help stimulate student interest, expose them to sustainability problems and potential solutions, and implement strategies to help solve these challenges.
Descriptors: Water Pollution, Integrated Activities, Metallurgy, Laboratory Experiments, Chemistry, Science Education, Biochemistry, College Science, Scientific Concepts, Measurement Techniques, Spectroscopy
Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: N/A