Manipulation of planar oxygen defect arrangements in multifunctional magnèli titanium oxide hybrid systems: from energy conversion to water treatment

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dc.contributor.authorLiu, YCen_AU
dc.contributor.authorYang, Jen_AU
dc.contributor.authorLiu, Yen_AU
dc.contributor.authorZheng, Jen_AU
dc.contributor.authorLee, Wen_AU
dc.contributor.authorShi, JJen_AU
dc.contributor.authorHorlyck, Jen_AU
dc.contributor.authorXie, JZen_AU
dc.contributor.authorTay, YYen_AU
dc.contributor.authorTan, TTen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorZhang, CYen_AU
dc.contributor.authorToe, CYen_AU
dc.contributor.authorWaite, TDen_AU
dc.contributor.authorScott, Jen_AU
dc.contributor.authorWang, Yen_AU
dc.contributor.authorWu, Ten_AU
dc.contributor.authorHan, SHen_AU
dc.contributor.authorLi, Sen_AU
dc.date.accessioned2021-12-17T00:41:27Zen_AU
dc.date.available2021-12-17T00:41:27Zen_AU
dc.date.issued2020-10-28en_AU
dc.date.statistics2021-11-29en_AU
dc.description.abstractAn extremely close relationship exists between energy usage and water supply with a tremendous amount of energy being consumed to process water for drinking and other purposes. The current energy crisis and inefficient water management place enormous stress on the sustainability of our society and environment. As such, the development of high-efficiency, cost-effective, and environmentally friendly materials which possess co-existing functionalities for applications ranging from energy capture to water treatment in one material, provides an opportunity to achieve sustainable development. As multifunctional materials, the layer-structured Magnèli titanium oxides with stoichiometry of TinO2n−1 (n ≥ 2) have been extensively studied in view of their potential for photocatalytic, thermoelectric and photothermal applications over the past few years. This group of materials occurs naturally as layered structures with planar oxygen defects, however, understanding of the correlation between the planar arrangements of the oxygen defects and various energy-related properties remains limited. Here, we demonstrate how the formation of layer structured TinO2n−1 with various planar oxygen defect arrangements correlates with the changes of their physical and chemical properties. The experimental results from inelastic neutron scattering analysis and electrical characterizations provide evidence that the planar oxygen defects are responsible for phonon scattering and exert a strong influence on their electrical conductivities. Manipulating these planar defects allows interconversion between different phases, which changes the interplay between electronic and phononic sub-systems. These manipulations potentially enable optimization of the corresponding physical properties of these materials such that they are rendered suitable for applications that require co-operative multifunctionality. More specifically, the experimental results demonstrate that the valence band positions and the onset potentials in the materials are raised, further enhancing their ability for catalysis of electrochemical reactions. This work also demonstrates the combinational effects of the thermoelectric and photothermal properties of these materials on their photocatalytic and electrochemical performance thereby providing a novel means of controlling the multi-response functionality of these materials for a variety of applications in different environments. © The Royal Society of Chemistry 2020en_AU
dc.identifier.citationLiu, Y., Yang, J., Liu, Y., Zheng, J., Lee, W., Shi, J., Horlyck, J., Xie, J., Tay, Y. Y., Tan, T. T., Yu, D., Mole, R., McIntyre, G., Zhang, C., Toe, C. Y., Waite, T. D., Scott, J., Wang, Y., Wu, T., Hang, S., & Li, S. (2020). Manipulation of planar oxygen defect arrangements in multifunctional magnèli titanium oxide hybrid systems: from energy conversion to water treatment. Energy & Environmental Science, 13, 5080-5096. doi:10.1039/D0EE02550Jen_AU
dc.identifier.issn1754-5706en_AU
dc.identifier.journaltitleEnergy & Environmental Scienceen_AU
dc.identifier.pagination5080-5096en_AU
dc.identifier.urihttps://doi.org/10.1039/D0EE02550Jen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12526en_AU
dc.identifier.volume13en_AU
dc.language.isoenen_AU
dc.publisherRoyal Society of Chemistryen_AU
dc.subjectWater supplyen_AU
dc.subjectSustainabilityen_AU
dc.subjectWater treatmenten_AU
dc.subjectTitanium oxidesen_AU
dc.subjectStoichiometryen_AU
dc.subjectThermoelectric propertiesen_AU
dc.titleManipulation of planar oxygen defect arrangements in multifunctional magnèli titanium oxide hybrid systems: from energy conversion to water treatmenten_AU
dc.typeJournal Articleen_AU
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