rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Synthesis and characterization of hybrid nanofluids from magnetite and gold nanoparticles
  name:
    name part: Haiza Haroon
    role:
      role term: creator
    role:
      role term: author
  name:
    name part: Iskandar Idris Yaacob
    name part: Prof., Dr
    role:
      role term: degree supervisor
  name:
    name part: Ahmad Zahirani Ahmad Azhar
    name part: Asst., Prof., Dr
    role:
      role term: degree supervisor
  name:
    name part: International Islamic University Malaysia
    name part: Kulliyyah of Engineering
  genre: Theses, IIUM local
  origin info:
    place:
      place term: my
    date issued: 2019
  language:
    language term: eng
  physical description:
    extent: xx, 202 leaves : illustrations ; 30cm.
  abstract: Nanofluids is a good candidate for heat transfer applications due to their anomalous thermal conductivity enhancement. Mixed nanofluids (MNs) also known as hybrid nanofluids based on mixture of magnetite, Fe3O4 and gold, Au nanoparticles were successfully developed in this work. Magnetite, Fe3O4 nanoparticles produced via Massart's procedure (a simple co-precipitation technique) were used to prepare water based magnetite ferrofluids without addition of any stabilizing agent or surfactant. Magnetic properties measured by vibrating sample magnetometer (VSM) at room temperature showed that magnetite nanoparticles are almost superparamagnetic with coercivity (Hc) value of 40.164 G. The saturation magnetization (Ms) of the magnetite nanoparticles was 61.864 emu/g which is lower than the bulk value of 92-100 emu/g. Five water based ferrofluids were prepared using different volume fractions of magnetite suspension 0.1, 0.05, 0.02, 0.01 and 0.005, respectively. Colloidal gold (Au) nanoparticles were synthesized using electro-dissolution-reduction method that consists of a simple two-electrode cells connected to a DC power supply. Throughout the process, bulk gold at the anode was oxidized into gold cations which then reacted with the chloride ions to form aurochloride complex. The complex ions were then reduced by the citrate ion to form colloidal gold nanoparticles. The parameters investigated are effects of terminal voltage and citrate concentration. The effects of these parameters on the particle size, shape and distribution were studied. For the effect of terminal voltage, the mean particle sizes obtained were 28.22 nm, 28.12 nm and 25.04 nm for 32 V, 36 V and 40 V, respectively from transmission electron microscope (TEM) analysis. For the effect of citrate concentration, the mean sizes of gold nanoparticles were 28.12 nm, 28.33 nm, 29.14 nm and 29.68 nm for 0.05 M, 0.10 M, 0.15 M and 0.20 M, respectively from TEM analysis. TEM micrograph showed that the shape of gold n…
  note: by Haiza binti Haroon
  note: Abstracts in English and Arabic.
  note: "A thesis submitted in fulfilment of the requirement for the degree of Doctor of Philosophy (Engineering)." --On title page.
  note: Thesis (Ph.D)--International Islamic University Malaysia, 2019.
  note: Includes bibliographical references (leaves 193-199).
  subject:
    geographic code: a-my---
  subject:
    topic: Nanoparticles
  subject:
    topic: Magnetite
  subject:
    topic: Gold
  classification: TA418.9N35
  identifier: http://studentrepo.iium.edu.my/handle/123456789/9454
  record info:
    record content source: UIAM
    record creation date: 200306
    language of cataloging:
      language term: eng