Logo Original ISIAME logo GR code


Find more about Weather in Olomouc, CZ


Registered conference abstracts

The page is gradually updated according to the submissions.

Registered contributions

Total number of registered contributions: 2

Registered talks

  1. Water purification and characterization of iron-aluminosilicate glass prepared by Sol-gel method
    Author(s): Irfan Khan, I. Khan et al.
    Institution: Tokyo Metropolitan University, Tokyo
    Abstract: Iron-containing silicate glass can be a good candidate for effective water purification. Hematite (α-Fe2O3) is a suitable material, due to its photocatalytic properties and low band gap energy [1]. In our previous study, precipitated α-Fe2O3 could be detected from the 57Fe-Mössbauer spectra of iron-containing silicate glass prepared by the sol-gel method [2] and melt-quenching method [3]. It showed a high rate constant of 2.87×10-2 h-1 [3] for methylene blue (MB) decomposition under visible light. In this study, we report the water purification ability and electronic conductivity of iron containing aluminosilicate glass with the composition of 40Fe2O3 • yAl2O3 • (60 – y ) SiO2 (in mass%, y = 0, 10, 15 and 20), abbreviated as 40FyAS. The samples prepared by the sol-gel method and subsequent calcination of the obtained dried gels at 1000 oC for 100 min were investigated by means of Low-temperature 57Fe-Mössbauer spectroscopy, TG-DTA, FT-IR, TEM, Impedance spectroscopy, and ultraviolet-visible light absorption spectroscopy (UV-VIS). The 57Fe-Mössbauer spectrum of 40FyAS glass was composed of two different doublets due to fayalite with constant isomer shift (IS) of 1.26 mm s-1 and quadrupole splitting (QS) of 2.97 mm s-1, Fe+3 (Td) with increasing IS from 0.19 to 0.32 mm s-1 and increasing QS from 0.48 to 1.09 mm s-1 as well as three magnetic sextets ascribed to a regular hematite (α-Fe2O3: IS= 0.46, QS= 0.16 mm s-1) and the remaining two belonging to the A and B sites of magnetite. From wastewater degradation test, a decrease in the concentration from 285.6 to 45.2 mg L-1 was observed after 7 days when it was mixed with the 40F20AS under visible-light irradiation and yield the highest first-order rate constant of 23.7×10-2 day-1. DC conductivity results revealed that conductivity increases as alumina content increases. It is concluded that precipitation of α-Fe2O3 and the introduction of Al2O3 in the SiO2 matrix are essential for enhancing the visible light photocatalytic activity and electrical conductivity. [1] H. Zhang et al., J Mater Chem A, 4 (2014) 1421-1426. [2] Y. Takahashi et al., Hyperfine Interact. 226 (2014) 747–753. [3] S. Kubuki et al., J. Radioanal. Nucl. Chem. 301(1) (2014) 1-7.
  2. 57Fe MÖSSBAUER STUDY OF PHOTO-FENTON ACTIVE IRON-SILICATES PREPARED FROM DOMESTIC WASTE SLAG
    Author(s): Shiro Kubuki, Ahmed Salah Ali, et al
    Institution: Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachi-Oji, Tokyo 192-0397, Japan
    Abstract: I send my abstract in the form of PDF file.

Registered posters

Registered exhibitions