Synthesis and characterization of Cr-ZSM-5 composite in fluoride medium and its performance in oxidation reaction of 2-mercaptobenzotiazole

Abstract

Purpose

The purpose of this paper is to synthesize Cr-ZSM-5 using hydrothermal synthesis in acidic fluoride medium and the investigation of its catalytic performance in heterogeneous oxidation of 2-mercaptobenzothiazole in the presence of H₂O₂.

Design/methodology/approach

The framework was characterized by chemical composition, FT-IR, UV-visible spectroscopy, N₂ adsorption (BET), and diffraction x-ray (DRX). FT-IR spectroscopy shows the characteristic band of Si-O-Cr linkage around 960-990 cm⁻¹ and bands around 688-690 and 627 cm⁻¹, indicating the presence of extraframework chromium oxide. UV spectra show a shoulder around 244-257 and bands around 360-380 nm, assigning the tetrahedral coordinated environment in (O²⁻=Cr⁶⁺) − (Cr⁵⁺-O⁻¹), charge transfer transition state (CT) of isolated Cr (VI) inside the structure of Cr-ZSM-5.

Findings

The catalytic degradation of 2-mercaptobenzothiazole by H₂O₂ heterogenous oxidation using catalyst Cr-ZSM-5 showed the formation of bis (benzothiazoyl) disulfide with 95 percent yield.

Originality/value

The application of this process in the environment (catalysis, adsorption, and degradation of organic compounds).

Citation

Imen, B., Fatiha, D., Ayada, D., Affaf, T. and Launay, F. (2017), "Synthesis and characterization of Cr-ZSM-5 composite in fluoride medium and its performance in oxidation reaction of 2-mercaptobenzotiazole", International Journal of Clothing Science and Technology, Vol. 29 No. 4, pp. 483-490. https://doi.org/10.1108/IJCST-08-2016-0095