https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47719 Wed 25 Jan 2023 13:22:33 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36598 Wed 10 Jun 2020 15:12:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36832 Ia3d symmetry and controllable surface properties through a simple polymerization of an environmentally benign and non-toxic guanidine hydrochloride as a C and N precursor using KIT-6 with variable pore sizes as templates for Suzuki coupling reaction. The pore diameters (3.1-4.2 nm), specific surface areas (207-303 m² g^-1), and the specific pore volumes (0.58-0.71 cm³ g^-1) of the MGCN-6 materials are finely controlled by varying the pore size of the templates used. The nano cavities of MGCN-6 with the highest specific surface area and a free amine groups are effectively utilized to chelate with Pd(OAC)₂ and applied the prepared catalysts for Suzuki coupling reaction between aryl halides with phenylboronic acid derivatives under very mild and sustainable reaction conditions. The Pd(OAC)₂/MGCN-6 is found to be very active and stable and exhibits an excellent reactivity and selectivity for all of substrates regardless of aryl halides with electron-withdrawing and electron donating groups at room temperature. The activity of the Pd(OAC)₂/MGCN-6 is much higher than that of non-porous bulk graphitic carbon nitride and 2D mesoporous carbon nitride.]]> Wed 08 Jul 2020 15:26:45 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47353 Tue 30 Apr 2024 15:16:20 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34544 Arundo donax and solid KOH at 600 °C for 2 h. The texture and the specific surface area of the activated microporous carbons can be controlled by adjustment of the ratio of Arundo donax and solid KOH. The prepared microporous carbons display larger surface areas and micropore volumes than those of the activated microporous carbon prepared by a two-step reaction. The porous carbon prepared with the KOH/biomass weight ratio of 2 (KLB2) exhibits the largest surface area of 1122 m² g⁻¹ and the highest micropore volume of 0.50 cm³ g⁻¹. Among the materials studied, KLB2 exhibits the highest CO₂ adsorption capacity at 273 K of up to 6.3 mmol g⁻¹ at 1 bar while the adsorption capacity at 273 K is increased to 15.4 mmol g⁻¹ at 30 bar. Present work demonstrates that highly stable activated microporous carbons can be prepared in a single step for effective CO₂ capture for both post- and pre-combustion. As the highly stable microporous carbons are prepared from waste biomass, it can provide an efficient way for developing cost effective adsorbents for CO₂ capture at low and high pressure.]]> Tue 26 Mar 2019 13:55:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31004 Arundo donax, with zinc chloride. The textural parameters of the AMB can easily be controlled by varying the activation temperature. It is demonstrated that the mesoporosity of AMB can be finely tuned with a simple adjustment of the amount of activating agent. AMB with almost 100% mesoporosity can be achieved using the activating agent and the biomass ratio of 5 and carbonization at 500 °C. Under the optimized conditions, AMB with a BET surface area of 3298 m² g^–1 and a pore volume of 1.9 cm³ g^–1 can be prepared. While being used as an adsorbent for CO₂ capture, AMB registers an impressively high pressure CO₂ adsorption capacity of 30.2 mmol g^–1 at 30 bar which is much higher than that of activated carbon (AC), multiwalled carbon nanotubes (MWCNTs), highly ordered mesoporous carbons, and mesoporous carbon nitrides. AMB also shows high stability with excellent regeneration properties under vacuum and temperatures of up to 250 °C. These impressive textural parameters and high CO₂ adsorption capacity of AMB clearly reveal its potential as a promising adsorbent for high-pressure CO₂ capture and storage application. Also, the simple one-step synthesis strategy outlined in this work would provide a pathway to generate a series of novel mesoporous activated biocarbons from different biomasses.]]> Sat 24 Mar 2018 07:34:50 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36983 Mon 29 Jan 2024 18:02:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47582 Mon 23 Jan 2023 14:21:37 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48279 Mon 13 Mar 2023 19:19:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42818 Mon 05 Sep 2022 11:14:22 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44721 Fri 21 Oct 2022 11:17:27 AEDT ]]>