https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45087 OS[Cu], was synthesized and fully characterized by means of spectroscopical, electrochemical, and photophysical methods. The copper metallopolymer was found to be highly active for the electrocatalytic hydrogen generation (HER) in an aqueous solution at pH 7.4 and overpotentials at 300 mV vs. reversible hydrogen electrode (RHE). Compared to the platinum electrode, the obtained overpotential is only 100 mV higher. The photoelectrochemical tests revealed that the complexation of the conjugated polymer P_OS turned its intrinsically electron-accepting (p-type) properties into an electron-donor (n-type) with photocurrent responses ten times higher than the organic photoelectrode.]]> Wed 26 Oct 2022 12:09:43 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49017 Wed 03 May 2023 12:31:31 AEST ]]> https://nova.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 ]]>