https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Tuning the ATP-triggered pro-oxidant activity of iron oxide-based nanozyme towards an efficient antibacterial strategy https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41140 3O4 nanoparticles (NP) received great attention due to their effective peroxidase like activity. The pH dependent peroxidase activity of Fe3O4 NP results in generation of radical ·OH radical via the unique Fenton chemistry of iron. However, their pH dependent activity is restricted to acidic environment and dramatic loss in antibacterial activity is observed at near neutral pH. Here we describe a novel strategy to overcome the pH lacunae of citrate coated Fe3O4 NP by utilizing adenosine triphosphate disodium salt (ATP) as a synergistic agent to accelerate the radical ·OH radical production and restore its antibacterial activity over a wide range of pH. This synergistic combination (30 µg/mL Fe3O4 NP and 2.5 mM ATP) shows a high bactericidal activity against both gram positive (B. subtilis) and gram negative (E. coli) bacterial strains, in presence of H2O2, at neutral pH. The synergistic effect (Fe3O4 NP + ATP) is determined from the viability assessment and membrane damage studies and is further confirmed by comparing the concentration of generated radical ·OH radicals. Over all, this study illustrates ATP assisted and radical dotOH-mediated bactericidal activity of Fe3O4 nanozyme at near neutral pH.]]> Wed 27 Jul 2022 14:33:27 AEST ]]> Effect of halides on the solvation of poly(ethylene oxide) in the ionic liquid propylammonium nitrate https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35476  Br− addition > Cl− addition. Our experimental observations are consistent with the recently reported solvation structure of PEO in these solutions (Stefanovic et al., 2018). The increased charge density from NO3− to Br− to Cl− results in greater net ionic interaction between the ionic charge centres. As PEO interacts with PAN primarily through the ammonium hydrogens of the cation, this increased ionic interaction effectively displaces the PEO, resulting in poorer solvation.]]> Wed 24 May 2023 15:03:35 AEST ]]> Comparing polymer-surfactant complexes to polyelectrolytes https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55190 Wed 24 Apr 2024 12:59:00 AEST ]]> Hofmeister effects influence bulk nanostructure in a protic ionic liquid https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50877 Wed 16 Aug 2023 10:51:36 AEST ]]> Effect of cation alkyl chain length on surface forces and physical properties in deep eutectic solvents https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30813 Wed 11 Apr 2018 12:49:41 AEST ]]> Facile synthesis of cerium oxide nanoparticles decorated flower-like bismuth molybdate for enhanced photocatalytic activity toward organic pollutant degradation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35936 in-situ precipitation of CeO₂ nanoparticles (size: ~26 nm) on the surface of flower-like Bi₂MoO₆ superstructures (diameter: 2.1-3.5 µm) by a simple method. The as-prepared photocatalysts were systematically characterized by a range of techniques. The photocatalytic degradation of rhodamine B (RhB) dye, methyl orange (MO) dye and tetracycline (TC) antibiotic by this novel photocatalyst was investigated under visible-light irradiation. The CeO₂/Bi₂MoO₆ heterojunction with a CeO₂/Bi₂MoO₆ weight ratio of 0.05 (0.05Ce-Bi) exhibited the highest photocatalytic activity with the RhB degradation efficiency of 100% in 75 min, which was considerably higher than those of pristine CeO₂ (26.8%) and Bi₂MoO₆ (80.3%) as well as their physical mixtures (74.8%). The more efficient separation of electron-hole pairs was identified as the primary reason of the enhanced photocatalytic activity. Moreover, the synthesized material maintained satisfactory activity even after 6 recycling runs, indicating its high photocatalytic stability. Therefore, our finding offers a new avenue for development of stable and efficient heterojunction photocatalysts for environmental purification.]]> Wed 01 Jul 2020 10:18:43 AEST ]]> Shear dependent viscosity of poly(ethylene oxide) in two protic ionic liquids https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:14207 Tue 25 Jul 2023 12:18:21 AEST ]]> Specific ion effects on thermoresponsive polymer brushes: comparison to other architectures https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32551 Tue 23 Jun 2020 15:10:43 AEST ]]> Small angle neutron scattering study of the conformation of poly (ethylene oxide) dissolved in deep eutectic solvents https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32669 Tue 10 Jul 2018 15:31:13 AEST ]]> Z-scheme g-C₃N₄/Bi₂O₂[BO₂(OH)] heterojunction for enhanced photocatalytic CO₂ reduction https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38073 -1 h-1, which is 2.78 times higher that of pristine g-C₃N₄. The largely strengthened photocatalytic CO2 reduction activity mainly originates from the formation of Z-scheme band structures between g-C₃N₄ and Bi₂O₂[BO₂(OH)] benefiting for the efficient charge separation, which was confirmed by the photoeletrochemical, photoluminescence and ESR spectra. This study provides a new reference for fabrication of high-performance Z-scheme photocatalysts for CO₂ reduction.]]> Tue 03 Aug 2021 13:27:42 AEST ]]> A new low-cost hydroxyapatite for efficient immobilization of lead https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35489 Thu 28 Oct 2021 13:04:42 AEDT ]]> From Hofmeister to Hydrotrope: Effect of Anion Hydrocarbon Chain Length On a Polymer Brush https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50504 Thu 27 Jul 2023 12:56:38 AEST ]]> Fractal-like R5 assembly promote the condensation of silicic acid into silica particles https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39194 Thu 26 May 2022 15:47:31 AEST ]]> Remarks on the shear viscosity of surfaces stabilised with soluble surfactants (letter) https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:582 Thu 25 Jul 2013 09:10:29 AEST ]]> Ion specificity in the measured concentration depth profile of ions at the Vapor-Glycerol interface https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:51171 Thu 24 Aug 2023 14:33:44 AEST ]]> Competitive specific ion effects in mixed salt solutions on a thermoresponsive polymer brush https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41045 Thu 21 Jul 2022 14:42:22 AEST ]]> Facile one pot preparation of magnetic chitosan-palygorskite nanocomposite for efficient removal of lead from water https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49463 Thu 18 May 2023 13:01:04 AEST ]]> Unusual phosphatidylcholine lipid phase behavior in the ionic liquid ethylammonium nitrate https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50900 Thu 10 Aug 2023 13:18:03 AEST ]]> Facile synthesis of flower-like Ag₃VO₄/Bi₂WO₆ heterojunction with enhanced visible-light photocatalytic activity https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34102 in-situ anchoring Ag₃VO₄ nanoparticles (size: ~21 nm) on the surface of Bi₂WO₆ microflowers (diameter: 2.5-4.5 µm) by a facile deposition route. The photocatalytic activity of these heterojunctions were studied by decomposing cationic dye rhodamine B (RhB), anionic dye methyl orange (MO) and neutral para-chlorophenol (4-CP) under visible light irradiation (λ > 400 nm). Among all the tested catalysts, the heterojunction with a Ag₃VO₄/Bi₂WO₆ molar ratio of 0.15/1 displays the maximum activity with the RhB degradation rate constant of up to 0.0392 min-1, a 6.7 or 1.7 times more enhancement compared with the pure Bi₂WO₆ or Ag₃VO₄. It is found that the introduction of Ag₃VO₄ is in favor of suppressing the electron-hole pair recombination of Bi₂WO₆, leading to an enhanced photocatalytic activity with good stability. The photogenerated holes (h⁺) and superoxide radicals (O·₂¯) play critical roles during the photocatalytic process. Ag₃VO₄/Bi₂WO₆ will have great potential in applications for environmental remediation due to the facile preparation method and superior photocatalytic activity.]]> Thu 07 Feb 2019 14:26:20 AEDT ]]> The detachment of particles from coalescing bubble pairs https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8044 Sat 24 Mar 2018 08:35:03 AEDT ]]> Influence of polymer charge on the shear yield stress of silica aggregated with adsorbed cationic polymers https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:7624 Sat 24 Mar 2018 08:34:45 AEDT ]]> Measurement of bubble size distribution in a gas-liquid foam using pulsed-field gradient nuclear magnetic resonance https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:10852 Sat 24 Mar 2018 08:12:43 AEDT ]]> An investigation of bubble coalescence and post-rupture oscillation in non-ionic surfactant solutions using high-speed cinematography https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:18055 Sat 24 Mar 2018 08:06:16 AEDT ]]> Novel low voltage and solution processable organic thin film transistors based on water dispersed polymer semiconductor nanoparticulates https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19827 Sat 24 Mar 2018 07:56:57 AEDT ]]> Surface characterisation of chemically reduced electrolytic manganese dioxide https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5570 Sat 24 Mar 2018 07:49:28 AEDT ]]> Adsorption characteristics of zwitterionic diblock copolymers at the silica/aqueous solution interface https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5017 Sat 24 Mar 2018 07:44:09 AEDT ]]> Surface characterization of heat-treated electrolytic manganese dioxide https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:362 Sat 24 Mar 2018 07:42:37 AEDT ]]> Effect of sodium dodecylbenzene sulfonate on the motion of three-phase contact lines on the Wilhelmy plate surface https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:347 Sat 24 Mar 2018 07:42:29 AEDT ]]> Bias-dependent effects in planar perovskite solar cells based on CH₃NH₃PbI₃₋ₓClₓ films https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27227 Sat 24 Mar 2018 07:32:25 AEDT ]]> Computer simulations of particle-bubble interactions and particle sliding using Discrete Element Method https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28503 Sat 24 Mar 2018 07:29:17 AEDT ]]> Liquid transport in a multi-layer froth https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3505 Sat 24 Mar 2018 07:22:48 AEDT ]]> Empirical equations for meniscus depression by particle attachment https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3340 Sat 24 Mar 2018 07:22:35 AEDT ]]> The liquid flow force on a particle in the bubble-particle interaction in flotation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3292 Sat 24 Mar 2018 07:22:24 AEDT ]]> Exact and global rational approximate expressions for resistance coefficients for a colloidal solid sphere moving in a quiescent liquid parallel to a slip gas-liquid interface https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3296 Sat 24 Mar 2018 07:22:23 AEDT ]]> Influence of electrical double-layer interaction on coal flotation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3291 Sat 24 Mar 2018 07:22:23 AEDT ]]> A novel technique for improving interferometric determination of emulsion film thickness by digital filtration https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3493 Sat 24 Mar 2018 07:20:35 AEDT ]]> Effect of molecular weight of non-adsorbing polymer on the structure of depletion-induced flocs https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3367 Sat 24 Mar 2018 07:19:01 AEDT ]]> Drop penetration into porous powder beds https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3374 Sat 24 Mar 2018 07:18:58 AEDT ]]> The dynamic nature of contact angles as measured by atomic force microscopy https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3384 Sat 24 Mar 2018 07:18:56 AEDT ]]> Liquid drainage in single plateau borders of foam https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3351 Sat 24 Mar 2018 07:18:33 AEDT ]]> The effect of molecular weight of nonadsorbing polymer on the structure of depletion-induced flocs https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3349 Sat 24 Mar 2018 07:18:32 AEDT ]]> Viscosity effect on the structural compactness of latex flocs formed under weak depletion attractions https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3350 Sat 24 Mar 2018 07:18:32 AEDT ]]> Zeta potentials and yield stresses of silica suspensions in concentrated monovalent electrolytes: isoelectric point shift and additional attraction https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3352 Sat 24 Mar 2018 07:18:32 AEDT ]]> pH-responsive behavior of selectively quaternized diblock copolymers adsorbed at the silica/aqueous solution interface https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3142 Sat 24 Mar 2018 07:18:17 AEDT ]]> Dispersion stability of a ceramic glaze achieved through ionic surfactant adsorption https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3145 Sat 24 Mar 2018 07:18:17 AEDT ]]> The effects of pore structure on the behavior of water in lignite coal and activated carbon https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24952 Sat 24 Mar 2018 07:14:17 AEDT ]]> Layer-by-layer nanohybrids of Ni-Cr-LDH intercalated with 0D polyoxotungstate for highly efficient hybrid supercapacitor https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48203 Sat 11 Mar 2023 12:29:58 AEDT ]]> Corrosion Resistance and Mechanisms of Nd(NO<inf>3</inf>)<inf>3</inf> and Polyvinyl Alcohol Organic-Inorganic Hybrid Material Incorporated MAO Coatings on AZ31 Mg Alloy https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50599 Mon 31 Jul 2023 11:05:45 AEST ]]> Electrostatic formation of polymer particle stabilised liquid marbles and metastable droplets - effect of latex shell conductivity https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34971 Mon 27 May 2019 16:58:55 AEST ]]> Enzymatic hydrolysis of monoacylglycerols and their cyclopropanated derivatives: molecular structure and nanostructure determine the rate of digestion https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37941 Mon 05 Jul 2021 15:55:55 AEST ]]> Effect of ionic strength and salt identity on poly(N-isopropylacrylamide) brush modified colloidal silica particles https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33529 CH₃CO₂¯ > Cl¯ > NO̅₃ ~Br¯> I¯ > SCN¯ for the potassium series and Na⁺ > K⁺ > Cs⁺ > Li⁺ ~ NH⁺₄ for the chloride salts. The electrophoretic mobility of the modified particles in the presence of 100 mM potassium salts increased in magnitude as the brush layer collapsed and also with the chaotropic nature of the anion.]]> Fri 31 Jan 2020 16:50:10 AEDT ]]> Enhanced specific ion effects in ethylene glycol-based thermoresponsive polymer brushes https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33531 Fri 28 Jun 2019 11:32:06 AEST ]]> Impact of surface free energy on electrostatic extraction of particles from a bed https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47365 Fri 13 Jan 2023 14:57:40 AEDT ]]> Chemical instability of graphene oxide following exposure to highly reactive radicals in advanced oxidation processes https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32187 Fri 11 May 2018 13:24:24 AEST ]]> Effect of surfactants on the thermoresponse of PNIPAM investigated in the brush geometry https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50202 Fri 07 Jul 2023 09:49:26 AEST ]]>