https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44032 Wed 05 Oct 2022 15:18:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38128 Wed 04 Aug 2021 15:08:22 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40872 Tue 19 Jul 2022 14:24:28 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34742 2-based photocatalysts is continuing and, in particular, evolving a new strategy is an important aspect in this regard. In general, much effort has been devoted to the anatase TiO₂ modifications, despite there being only a few recent studies on rutile TiO₂ (rTiO₂). To the best of our knowledge, studies on the preparation and characterization of the photocatalysts based on the intentional inclusion of graphene (G) into rTiO₂ nanostructures have not been reported yet. Herein, we develop a new type of TiO₂-based photocatalyst comprising of G included pure rTiO₂ nanowire (abbreviated as rTiO₂(G) NW) with enhanced visible light absorption capability. To prepare rTiO₂(G) NW, the G incorporated titanate electrospun fibers were obtained by electrospinning and subsequently heat treated at various temperatures (500 to 800 °C). Electrospinning conditions were optimized for producing good quality rTiO₂(G) NW. The rTiO₂(G) NW and their corresponding samples were characterized by appropriate techniques such as X-ray diffraction (XRD), scanning electron microscopy, high-resolution transmission electron microscopy and UV-vis diffuse reflectance spectroscopy to ascertain their material characteristics. XRD results show that the lattice strain occurs upon inclusion of G. We present here the first observation of an apparent bandgap lowering because of the G inclusion into TiO₂ NW. While anatase TiO2 NW exhibited poor visible light photocatalysis towards NOx removal, the rTiO₂(G) NW photocatalyst witnessed a significantly enhanced (~67%) photocatalytic performance as compared to anatase TiO₂(G) NW. We concluded that the inclusion of G into rTiO₂ nanostructures enhances the visible light photoactivity. A plausible mechanism for photocatalysis is suggested.]]> Tue 03 Sep 2019 18:02:02 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39963 Thu 30 Jun 2022 16:35:31 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40482 Thu 14 Jul 2022 08:46:09 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44455 Thu 13 Oct 2022 15:15:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38568 2O4, CoFe₂O₄ and Fe_3,O₄) coated with PEG for MNF formulation and evaluated the loading/release efficacy of doxorubicin (DOX), an anticancer drug. We have presented in detail the drug loading capacity and the time-dependent cumulative drug release of DOX from PEG-coated MNPs based MNFs. Specifically, we have selected three different MNPs (NiFe₂O₄, CoFe₂O₄ and Fe₃O₄) coated with PEG for the MNFs and compared their variance in the loading/release efficacy of DOX, through experimental results fitting into mathematical models. DOX loading takes the order in the MNFs as CoFe₂O₄ > NiFe₂O₄ > Fe₃O₄. Various drug release models were suggested and evaluated for the individual MNP based NFs. While the non-Fickian diffusion (anomalous) model fits for DOX release from PEG coated CoFe₂O₄, PEG coated NiFe₂O₄ NF follows zero-order kinetics with a slow drug release rate of 1.33% of DOX per minute. On the other hand, PEG coated NiFe₂O₄ follows zero-order DOX release. Besides, several thermophysical properties and magnetic susceptibility of the MNFs of different concentrations have been studied by dispersing the MNPs (NiFe₂O₄, CoFe₂O₄ and Fe₃O₄) in the base fluid at 300 K under ultrasonication. This report on the DOX loading/release capability of MNF will set a new paradigm in view that MNF can resolve problems related to the self-heating of drug carriers during mild laser treatment with its thermal conducting properties.]]> Thu 04 Nov 2021 13:58:14 AEDT ]]>