Sol-Gel Synthesis of 30%SrTiO3/ηHZSM-5 Composite and Photocatalytic Degradation of RBR-X3B

Title:Sol-Gel Synthesis of 30%SrTiO3/ηHZSM-5 Composite and Photocatalytic Degradation of RBR-X3B

Volume: 13 Issue: 1

Author(s): Yufeng Sun, Zheng Ma and Wenjie Zhang

Affiliation:

Keywords: HZSM-5, photocatalysis, Sol-Gel, SrTiO₃.

Abstract: Background: The recent progress in photocatalytic oxidation technique is concentrated on developing new photocatalytic materials. Photocatalytic activity of strontium titanates depends on the phase composition and structure of these materials. Recently, the authors also reported the enhanced photocatalytic activity of SrTiO₃ after loading on a HZSM-5 zeolite.

Methods: The raw NaZSM-5 powders were treated in hydrochloric acid solution to prepare HZSM-5 through Na⁺-H⁺ ion exchange. The ηHZSM-5 supported strontium titanate was synthesized through a sol-gel route followed by thermal treatment. The composites were measured by X-ray diffraction, scanning electron microscopy, infrared spectrum and N₂ desorption analyses.

Results: SrTiO₃ is mainly supported on the surface of microporous HZSM-5 without apparently blocking the inner pores of the zeolite. HZSM-5 is responsible for the porous structure in the composites. Surface areas of the composites are much larger than that of pure SrTiO₃. Photocatalytic activity of SrTiO₃ is apparently improved after supporting on HZSM-5. The activity of 30%SrTiO₃/ηHZSM-5 can be affected by the variation of hydrochloric acid concentration with the optimal value of 0.3 mol/L. The absorption of RBR-X3B solution in visible region and most ultraviolet region are not found after 90 min of degradation on 30%SrTiO₃/0.3HZSM-5.

Conclusion: SrTiO₃ disperses on the surface of HZSM-5. Photocatalytic activity of 30%SrTiO₃/ ηHZSM-5 can be greatly affected by hydrochloric acid concentration with the optimal value of 0.3 mol/L. Not only RBR-X3B molecules can be decolorized during photocatalytic process, but also the dye can be almost fully degraded on the supported SrTiO₃ after a certain time.

Cite this article as:

Sun Yufeng, Ma Zheng and Zhang Wenjie, Sol-Gel Synthesis of 30%SrTiO3/ηHZSM-5 Composite and Photocatalytic Degradation of RBR-X3B, Current Nanoscience 2017; 13 (1) . https://dx.doi.org/10.2174/1573413712666160824151450

DOI https://dx.doi.org/10.2174/1573413712666160824151450	Print ISSN 1573-4137
Publisher Name Bentham Science Publisher	Online ISSN 1875-6786