https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52447 Wed 11 Oct 2023 14:53:52 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43978 Wed 05 Oct 2022 14:29:44 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48541 Tue 21 Mar 2023 15:16:52 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47138 Tue 14 Nov 2023 11:38:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36793 2 g⁻¹) and an appreciable amount of heteroatoms, nitrogen (4.4%) and oxygen (4.7%). PHC4 exhibits a high CO₂ adsorption capacity at 0 °C/1 bar (3.5 mmol g⁻¹) and 0 °C/30 bar (15.8 mmol  g⁻¹). Additionally, the presence of heteroatoms on the surface results in enhancement of interactions between CO₂ and the adsorbents which are evident from a high value of isosteric heat of adsorption (∼35 kJ mol⁻¹) calculated using Clausius Clapeyron's equation. The reported activation synthesis strategy could be explored further to devise advanced functional nanomaterials for specific adsorption applications.]]> Thu 22 Jun 2023 10:25:37 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27865 Sat 24 Mar 2018 07:41:11 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52777 Mon 29 Jan 2024 18:24:35 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:48269 Mon 13 Mar 2023 18:23:39 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:47769 Fri 27 Jan 2023 14:08:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40443 2) due to their low cost and abundant availability in many regions around the world. However, the performance of these materials is quite limited because of their small pore size and restricted specific surface area. In this work, we report on the physicochemical modification (calcination and dealumination) of natural Indonesian calcite-rich mordenite-clinoptilolite zeolites by acid and high temperature calcination treatment to enhance their CO₂ adsorption capacity. We demonstrated that the specific surface area of the original material can be finely tuned via simple adjustment of the concentration of HCl. Amongst different preparations, the zeolites treated with the 12 M HCl and calcination at 400 °C registered the highest specific surface area of 179.44 m²/g. This modification resulted in the highest CO₂ adsorption capacity of 5.2 mmol/g at 0 °C and 30 bar, corresponding to specific surface area normalized CO₂ adsorption capacity of 2.91 x 10^-2 mmol/m². This promising result revealed that careful modification of low-cost natural zeolite via a simple phisicochemical treatment not only enhanced the specific surface area and the pore size but also led to excellent CO₂ adsorption affinity when compared with the more costly synthetic materials. This finding demonstrates the potential of low cost natural product to be developed and utilized as a cost-effective adsorbent for CO₂.]]> Fri 22 Jul 2022 14:37:22 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53207 Fri 17 Nov 2023 11:48:02 AEDT ]]>