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Mesocrystalline anatase nanoparticles synthesized by a simple hydrothermal approach with enhanced light harvesting for gas-phase reaction

Abstract

Mesocrystalline TiO2 nanoparticles are synthesized by a hydrothermal approach. A simple two-step procedure at low temperature (< 140 ºC) let the nucleation of primary particles sized 2-4 nm and their subsequent assembly as almost spherical aggregates sized = 20 nm. X-ray powder diffraction (XRD), Raman and X-ray photoelectron (XPS) spectroscopies, and HRTEM studies confirm the anatase as unique TiO2 crystalline phase. The mesocrystalline structure of the anatase aggregates is clearly evidenced by HRTEM and SAED. The mesocrystalline nanopowders exhibit a mesopore structure with surface area and pore volume of 63.5 m2•g-1 and 0.22 cm3•g-1, respectively. Apart from ultraviolet (UV), visible light (Vis) absorption ability was recorded. The combined high effectiveness and selectivity on the NOx abatement of the new mesocrystalline photocatalyst is reported. It is to remark that the reached maximized selectivity through the NOx process is reported by the first time and could be associated with the mesopore nature of the anatase photocatalyst.

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Publication details

The article was received on 23 Feb 2018, accepted on 13 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8DT00721G
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Mesocrystalline anatase nanoparticles synthesized by a simple hydrothermal approach with enhanced light harvesting for gas-phase reaction

    J. Balbuena, J. M. Calatayud, M. Cruz, P. Pardo, F. Martín, J. Alarcón and L. Sanchez, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT00721G

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