Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6322
Title: Clinoptilolite supported rutile TiO2 composites: Synthesis, characterization, and photocatalytic activity on the degradation of terephthalic acid
Authors: Yener, H. B.
Yılmaz, M.
Deliismail, Özgün
Özkan, Seher Fehime
Helvacı, Şerife Şeref
Keywords: Clinoptilolite
Photodegradation
Reusable catalyst
Terephthalic acid
Titanium tetrachloride
Issue Date: Feb-2017
Publisher: Elsevier Ltd.
Source: Yener, H. B., Yılmaz, M., Deliismail, Ö., Özkan, S. F., Helvacı, Ş. Ş. (2017). Clinoptilolite supported rutile TiO2 composites: Synthesis, characterization, and photocatalytic activity on the degradation of terephthalic acid. Separation and Purification Technology, 173, 1726. doi:10.1016/j.seppur.2016.09.010
Abstract: Clinoptilolite supported rutile TiO2 composites were synthesized for the enhancement of its photocatalytic performance in the degradation of the aqueous terephthalic acid solution under UVC illumination by the increase in its surface area and to simplify its recovery from the treated solution after use. The XRD spectra of the composites revealed the formation of pure rutile TiO2 on the surface of the clinoptilolite. The SEM images showed the formation of the spherical TiO2 clusters were composed of nano fibers on the surface of the clinoptilolite. For all composites synthesized, the dispersion of the TiO2 particles on the clinoptilolite led to a surface area larger than that of the bare TiO2 and clinoptilolite. The materials synthesized in the present study exhibited higher catalytic activity compared with the commercial Degussa P25 and anatase. Among the catalysts synthesized the TiO2/clinoptilolite with a weight ratio of 0.5 was found to be the most photoactive catalyst even though it contains a lesser amount of active TiO2. The kinetic of the reactions for different catalyst was found to be consistent with the pseudo-first order kinetic model. The results of the Langmuir-Hinshelwood model showed the slight contribution of the adsorption on the degradation. The activity of the TiO2/clinoptilolite with a weight ratio of 0.5 decreased after repetitive use due to the accumulation of the TPA molecules on the surface of the catalyst.
URI: http://doi.org/10.1016/j.seppur.2016.09.010
http://hdl.handle.net/11147/6322
ISSN: 1383-5866
1873-3794
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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