Trimetallic gold silver copper nanorods for carbon dioxide reduction

Shiau, Amos

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https://hdl.handle.net/2142/124455 Copy

Description

Title

Trimetallic gold silver copper nanorods for carbon dioxide reduction

Author(s)

Shiau, Amos

Issue Date

2024-05-02

Director of Research (if dissertation) or Advisor (if thesis)

Murphy, Catherine J

Department of Study

Chemistry

Discipline

Chemistry

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Gold
• Silver
• Copper
• Nanorods
• Synthesis

Abstract

AuAgCu trimetallic nanorods of varying sizes and elemental ratios were synthesized using a seed-mediated growth procedure. These three metals were of interest due to their respective metal nanorods’ tunable plasmonic and catalytic properties especially in photocatalysis. The synthesis was adapted from a popular gold nanorods synthesis procedure where the modification would be replacing gold salts with copper salts. The formation of the rodlike shape was assisted by the presence of Ag ions with greater amounts of Ag forming higher aspect ratio nanorods, and their longitudinal localized surface plasmon resonance peaks (LSPR) were measured with a UV-Vis spectrometer. A standard size of trimetallic rods of widths between 10-14 nm were formed. A miniature size of these rods of widths between 4-8 nm were also created by increasing the volume of seeds added to the growth solution. Transmission electron microscopy (TEM) was used to measure the dimensions of the nanorods. LSPR extinction peaks ranged from 630 to 770 nm depending on the size and aspect ratio. Energy-dispersive X-ray spectroscopy (EDS) and inductively coupled plasma mass spectrometry (ICP-MS) were used to determine the elemental composition of the trimetallic nanorods. EDS was also used for elemental mapping of the nanorods to determine that all three metals form a disordered alloy throughout the entire nanorod.

Graduation Semester

2024-05

Type of Resource

Thesis

Copyright and License Information

Copyright 2024 Amos Shiau

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