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Abstract  

A simple method for preparing F-doped anatase TiO2 nanoparticles with high visible light photocatalytic activity was developed using TiCl4 and HF as TiO2 and fluorine precursors in HCl solution by a one-step hydrothermal treatment without any organic species. The presence of HF plays an important role in the formation of the F-doped shuttle-like anatase TiO2 nanostructures. XRD analysis showed that the F could prevent the transformation of anatase to rutile in HCl solution. Compared with ordinary TiO2, the F-doped TiO2 nanoparticles synthesized at 180 °C exhibited better photocatalytic activity for the degradation of rhodamine B under visible light irradiation. Possible formation mechanism of F-doped anatase TiO2 under hydrothermal conditions was discussed.

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Reaction Kinetics, Mechanisms and Catalysis
Authors: A. Martínez-de la Cruz, D. B. Hernández-Uresti, Leticia M. Torres-Martínez and S. W. Lee

, only samples of PbMoO 4 synthesized by solid-state reaction, co-precipitation and solvothermal methods have been tested as photocatalysts [ 8 , 9 , 14 ]. In this work, the hydrothermal reaction was selected as a chemical route to design a new

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temperatures ranging from 500 to 900 °C [ 7 – 9 ]; with this process, it is possible to achieve BET-N 2 surface areas between 7 and 13 m 2 g −1 . Another low-temperature process is based on the formation of high-surface area precursors by hydrothermally

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structures such as EPS are converted into simple soluble organics. Pre-treatment techniques are suggested to facilitate the hydrolysis step in order to achieve faster disintegration and higher degradation efficiency. Specifically, hydrothermal treatment has

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structures such as EPS are converted into simple soluble organics. Pre-treatment techniques are suggested to facilitate the hydrolysis step in order to achieve faster disintegration and higher degradation efficiency. Specifically, hydrothermal treatment has

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learning , New York , Addison-Wesley , 1989 . [6] Gil E. , Bustos J. , Rudnick H. Short-term hydrothermal generation

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T. , Šulek P. Impact of genetic algorithm parameters on optimization of hydrothermal coordination , Pollack Periodica , Vol. 11 , No. 2 , 2016 , pp. 113 – 123 . [4

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annak hidrotermális eredete Földtani Közlöny 106 3 257 275 (Silicification of the Hárshegy Sandstone and its hydrothermal origin

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Journal of Thermal Analysis and Calorimetry
Authors: J. Maul, A. S. Brito, A. L. M. de Oliveira, S. J. G. Lima, M. A. M. A. Maurera, D. Keyson, A. G. Souza and I. M. G. Santos

in applications such as gas sensors, magnetic storage media, solar cells, and dyes [ 2 ]. Several methods of chemical synthesis have gained popularity for oxide preparation, including CuO. Among them, the microwave hydrothermal method has been

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The transformation of gibbsite have been studied under hydrothermal influence. Results of the X-ray diffraction analysis of the samples heated at different temperatures from 170°C to 265°C are also discussed in detail. The percentage of the boehmite phase formed, due to the transformation of the gibbsite, have been determined by comparing the intensity of the most strongest reflection of the boehmite phase with a fully transformed sample. The activation energy value calculated form X-ray diffractograms is almost comparable with the value calculated from main DTA endotherm of gibbsite.

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