https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50560 Wed 28 Feb 2024 15:26:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49628 Wed 24 May 2023 13:32:39 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44620 Tue 18 Oct 2022 10:29:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38169 2O/(Si + Al), and their detailed porous structures were confirmed by TEM, N2 adsorption-desorption and X-ray diffraction measurements. The as-prepared geopolymers were then used as templates to replicate porous carbons with various structures and porosities for CO₂ adsorption. To understand the correlation between the CO₂ adsorptivity and porous structures, we tuned the porosity of the geopolymer-templated carbons by modifying the structures of the geopolymers. The porous carbons obtained from the hexagonal-type porous geopolymers were found to be composed of the aggregates of carbon nanowires exhibiting large particles, while those obtained from the wormhole-like porous geopolymers were determined to be wormhole type as well, as evidenced by TEM and X-ray diffraction studies. According to the CO₂ adsorption isotherms of the porous carbons, the aggregates of carbon nanowires exhibited the highest CO₂ adsorptivity due to their highest microporosity and largest specific surface area.]]> Thu 05 Aug 2021 15:57:46 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51383 Mon 04 Sep 2023 10:37:52 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45447 Fri 28 Oct 2022 14:08:10 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35922 1–x(ZnO)_x] is one of the promising visible light harvesting photocatalysts for overall water splitting. A series of (GaN)_1–x(ZnO)_x (0.11 ≤ x ≤ 0.33) compounds are synthesized by calcining the carbonate-type Zn/Ga-LDH precursor with and without sodium carbonate flux at 850 °C for 8–14 h under a NH₃ gas flow. The solid solutions without flux are determined to be low in crystallinity, but platelike morphology with preferred orientation could be observed. On the other hand, those with flux turn out to be better in crystallinity, and eventually exhibit significantly higher photocatalytic activity for overall water splitting under visible light irradiation than those without flux. In addition, the band gap energies can also be engineered from 2.57 to 2.72 eV by changing a synthetic parameter such as nitridation time. It is, therefore, suggested that the present new approach can offer new opportunities for designing the next generation of photocatalytic systems.]]> Fri 17 Jan 2020 09:43:08 AEDT ]]>