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Self-Supported Monolith Formation of Silica Nanoparticles with Hollow Nickel Core

Li, Zequn (2019) Self-Supported Monolith Formation of Silica Nanoparticles with Hollow Nickel Core. Master's Thesis, University of Pittsburgh. (Unpublished)

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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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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairVeser,
Committee MemberMcKone,
Committee MemberNiepa,
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 2019 15:50


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