https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37222 Wed 02 Sep 2020 15:46:21 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:42999 Thu 25 May 2023 09:29:31 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42627 61 -butyric acid methyl ester (P3HT:PC₆₁BM) photoactive system, that can influence the optoelectronic properties for enhanced performance in BHJ PSCs. The optical, electrical, morphological, surface, structural characteristics of the fabricated BHJ PSCs were systematically examined. The atomic force microscopy and X-ray photoelectron spectra measurements confirmed the structural reorganization, phase separation of polymer and fullerene domains resulting in the formation of well-ordered blend in the additive based devices. BHJ PSCs fabricated with P3HT:PC₆₁BM:2-DHP and P3HT:PC₆₁BM:2,4-DHP yielded a best power conversion efficiency (PCE) of 4.35% and 3.58%, respectively, which in contrast outperformed than the PCE obtained from P3HT:PC₆₁BM device (3.01%). The remarkably improved performance for P3HT:PC₆₁BM:2-DHP can be attributed to the enhanced short-circuit current density induced by the morphology optimization. Additionally, the devices fabricated with the solid additives (2-DHP and 2,4-DHP) exhibited improved air-stability due to the oxygen insensitivity of the functional groups present in the chosen additives. The pyridine and hydroxyl groups in 2-DHP and 2,4-DHP possibly form the intermolecular interactions with the photoactive components (P3HT/PC₆₁BM), contribute to the morphology optimization and subsequent PV performance enhancement in BHJ PSCs. It is believed that our findings can inspire and trigger further advanced research toward the design and development of stable and highly efficient BHJ PSCs by rationally choosing low-cost solid additives.]]> Mon 29 Jan 2024 18:04:59 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44723 Mon 29 Jan 2024 17:47:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47590 Mon 23 Jan 2023 14:49:25 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44724 60BA) photoactive medium. A dramatic increase in the power conversion efficiency (~20%) was witnessed for the BHJ PSCs treated with DHP compared to the pristine devices. A plausible explanation describing the alignment of pyridine moieties of DHP with the indene side groups of IC₆₀BA is presented with a view to improving the performance of the BHJ PSCs via improved crystalline order and hydrophobicity changes.]]> Fri 21 Oct 2022 13:46:48 AEDT ]]>