Li, Zequn
(2019)
Self-Supported Monolith Formation of Silica Nanoparticles with Hollow Nickel Core.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
Along with a specific size (1-100 nm), nanoparticles are characterized by high specific
surface area and surface energy. Due to these advantages, nanoparticles have drawn attention and
shown potential in various fields, such as catalysis, optics and medicine. However, “naked”
nanoparticles suffer from significant shortfall, in particular its limited stability. In addition,
commonly used nanoparticles are in the form of powder and will raise health and environmental
concerns. Core-shell-nanoparticle (CSN) could help to overcome the limited stability of naked
nanoparticles by mitigating particle agglomeration, while assembly of nanoparticles into
macroscopic structures, either via self-assembly or guided assembly, could address the health and
environmental concerns. Our work investigated the guided self-assembly of hollow
Ni@SiO2 CSNs into macroscopic monoliths with dimensions in the centimeter range. By
chemically cross-linking these nanoparticles and carefully controlling the cross-linking reaction,
we were able to synthesize, for the first time, structurally stable, self-supporting monolithic
structures composed solely of CSNs. Critical synthesis parameters, including temperature, pH, and
reactant concentrations were identified and will be discussed in my presentation.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
18 June 2019 |
| Date Type: |
Publication |
| Defense Date: |
26 March 2019 |
| Approval Date: |
18 June 2019 |
| Submission Date: |
4 April 2019 |
| Access Restriction: |
5 year -- Restrict access to University of Pittsburgh for a period of 5 years. |
| Number of Pages: |
84 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Chemical Engineering |
| Degree: |
MSChE - Master of Science in Chemical Engineering |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
nanopartilces, self-assembly |
| Date Deposited: |
18 Jun 2019 15:50 |
| Last Modified: |
18 Jun 2024 05:15 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/36326 |
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