Multifunctional and highly active zinc titanate incorporated with copper for adsorptive hot syngas desulfurization and photocatalytic dye degradation


Tuna Ö., Bilgin Simsek E., Sarıoğlan A., Durak Çetin Y.

Journal of the Taiwan Institute of Chemical Engineers, vol.112, pp.388-396, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 112
  • Publication Date: 2020
  • Doi Number: 10.1016/j.jtice.2020.04.008
  • Journal Name: Journal of the Taiwan Institute of Chemical Engineers
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Compendex, Computer & Applied Sciences, INSPEC
  • Page Numbers: pp.388-396
  • Keywords: Zinc titanate, Adsorptive desulfurization, Orange II, Photocatalysis, REACTIVE ADSORPTION, ORANGE-II, CU, SORBENTS, REMOVAL, H2S, ZN, TI, CATALYST, OXIDE
  • Istanbul Technical University Affiliated: Yes

Abstract

Multifunctionality is of a paramount significance in the case of metal oxide-based material. In the present study, Cu-doped zinc titanates in different Cu/Zn weight ratios were prepared with co-precipitation method to utilize as an adsorbent and a photocatalysts for H2S removal and dye degradation, respectively. The structural and morphological analyses were carried out using XRD, XPS, SEM and BET. The experiment results showed that the catalysts had a desulfurization ability with the Cu/Zn weight ratio of 0.06:1, which H2S in the feed was captured with 100% efficiency in N-2 atmosphere at 750 degrees C during 5 h, also the removal decreased to 57% in a reducing atmosphere at the end of 5 h. The appropriate Cu loading content could lead to the high active and low apparent activation energy. In addition, the Cu-based catalyst showed an excellent photocatalytic activity under UV light irradiation, which the degradation of Orange II (OII) was found to be 80% at the end of 3 h. The metal loading reduced the band-gap and increased oxygen vacancies of zinc titanate. The reactive adsorptive desulfurization and excellent photocatalytic activity results demonstrate Cu loaded zinc titanate as a promising material for multifunctional applications. (C) 2020 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.