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 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 112
  • Publication Date: 2020
  • Doi Number: 10.1016/j.jtice.2020.04.008
  • Title of Journal : Journal of the Taiwan Institute of Chemical Engineers
  • 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

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.