Abstract

Metal-Organic Frameworks (MOFs) are an important class of materials that are gaining increasing relevance for many fields including energy storage, CO2 capture, photovoltaics, and catalysis. MOF mediated synthesis (MOFMS) is the decomposition of a MOF to form an amorphous carbon material decorated with metal nanoparticles. MOF thin films are an area where MOFMS has not been thoroughly explored, yet they are likely to be industrially relevant due to their potential application as highly dispersed, sinter resistant supported catalysts. In this work, we have developed a method for the growth of copper- and zinc-based MOF thin films on silicon- and aluminum- based wafers. A series of decomposition processes have allowed us to determine which variables can be used to design the final nanoparticle decorated product. These variables include oxygen/nitrogen ratios, the impact of water in atmospheric decomposition, substrate composition, and reduction under hydrogen. A high degree of control over the final thin film product is achieved, with the ability to make a carbon supported CuO structure with features between 1-5 nm, or CuO nanoparticles ranging from 10-500 nm, as well as finely tuned carbon/Cu ratios. Partially reduced Cu nanoparticles were obtained and used in the dehydrogenation of ethanol and methanol. Finally, alloyed nanoparticles were obtained through the growth and decomposition of Cu/Zn mixed-metal MOFs. Understanding the growth and decomposition variables as applied to supported MOF-thin films will enable development of next generation nanomaterials for use in catalysis.

Degree

PhD

College and Department

Physical and Mathematical Sciences; Chemistry and Biochemistry

Rights

https://lib.byu.edu/about/copyright/

Date Submitted

2022-04-07

Document Type

Dissertation

Handle

http://hdl.lib.byu.edu/1877/etd12705

Keywords

Thin Film, Metal-Organic Framework, Supported Nanocrystals, Spin Coating, Catalysis, Alloyed Nanoparticles

Language

english

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