dc.contributor.advisor |
Metson, J |
en |
dc.contributor.advisor |
Jones, M |
en |
dc.contributor.author |
Shimamura, Akihiro |
en |
dc.date.accessioned |
2014-08-28T21:27:31Z |
en |
dc.date.issued |
2014 |
en |
dc.identifier.citation |
2014 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/22813 |
en |
dc.description.abstract |
Layered double hydroxide (LDH) materials have been applied in many applications. Use as an environmental adsorbent is one of the most common applications of LDHs because of their anion exchange function and recyclability. However a lot of these studies have focussed on the adsorption process rather than the equally important desorption process. Desorption is critical to improve the recyclability of the LDH material. This thesis examines a new phosphate recovery system from phosphate intercalated Mg/Al-LDH, based on the use of surfactant anions. The surfactant anion is used to exchange the interlayer phosphate of the Mg/Al-LDH material. This new method is shown to remove interlayer phosphate with a higher desorption ratio than conventional methods using concentrated sodium carbonate solution or mixed solutions of sodium chloride and sodium hydroxide. The mechanism for the improved ratio for phosphate desorption with surfactant anions is demonstrated by several case studies in this thesis. In addition to the new phosphate recovery system, the thesis reports development of a new photo electrode based on decomposition of Zn/Al-LDH. Photocatalysis from films on zinc substrates is observed following calcination of Zn/Al-LDH. The thermal behaviour of powdered Zn/Al-LDH is also examined to understand thermal transformation of the Zn/Al-LDH and the photocatalytic properties of the calcined Zn/Al-LDH. The Zn/Al-LDH is fabricated on a zinc metal substrate by hydrothermal treatment and then converted to an active photocatalyst by thermal treatment. |
en |
dc.publisher |
ResearchSpace@Auckland |
en |
dc.relation.ispartof |
PhD Thesis - University of Auckland |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Layered double hydroxides materials for phosphate recovery and photoelectrode applications |
en |
dc.type |
Thesis |
en |
thesis.degree.grantor |
The University of Auckland |
en |
thesis.degree.level |
Doctoral |
en |
thesis.degree.name |
PhD |
en |
dc.rights.holder |
Copyright: The Author |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
en |
pubs.elements-id |
455331 |
en |
pubs.record-created-at-source-date |
2014-08-29 |
en |
dc.identifier.wikidata |
Q112200905 |
|