Enhanced photodegradation of hazardous tartrazine by composite of nanomolecularly imprinted polymer-nanophotocatalyst with high efficiency

Abstract

In this research, a nanocomposite of molecularly imprinted polymer (MIP)-nanophotocatalyst for enhanced photodegradation of tartrazine with high efficiency and nanocomposite of non-imprinted polymer (NIP)-nanophotocatalyst were synthesized by precipitation polymerization and it was carried out in an aqueous medium to employ a green method. Acrylamide as functional monomer, N,N´-methylene-bis-acrylamide as cross-linking agent, tartrazine as a template, and TiO 2 as a nanophotocatalyst were used. The synthesized nanocomposites (MIP-TiO 2 and NIP-TiO 2 ) were characterized by using thermal gravimetric analysis, scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. The MIP nanocomposite as an effective sorbent was used to extract and photodegrade tartrazine from water media. The effects of pH, time, and concentration of tartrazine solution and kinetics of photodegradation of tartrazine were investigated. The best pH and the optimum time for tartrazine photodegradation in a 10 ml solution containing tartrazine (3 × 10 −5 M) and nanocomposite (1 mg) were obtained to be 2 and 5 h, respectively. The results showed that the MIP nanocomposite has improved the photodegradation of tartrazine by 100% compared to NIP nanocomposite and pure nanophotocatalyst which yielded at 63 and 56%, respectively, under the same condition.

Construction of a TiO2–Fe3O4‐decorated molecularly imprinted polymer nanocomposite for tartrazine degradation: Response surface methodology modeling and optimization

“…The synthesis procedure was according to our earlier reports with a slight modification by introducing the magnetic nanoparticles into the composites. In detail (Figure ), the MIP of TZ was prepared by a noncovalent approach.…”

“…In the next step, we synthesized a nanocomposite of this nano‐MIP with TiO 2 using the same precipitation polymerization method with TiO 2 introduced at the beginning of the polymerization process. The nanocomposite has shown a promising result for photodegradation of TZ. Hence, we herein aim at the enhancement of the previous nanocomposite functionality by endowing it with a magnetic recovery property through the addition of Fe 3 O 4 nanoparticles into the composite.…”

Fabrication and Characterization of Nano Titania-Magnetic Reduced Graphene Oxide with Highly Photocatalytic Degradation of Tartrazine Dye

“…The suitable dose per person is 0-7.5mg/kg body weight [10]. Tartrazine is considered as a dangeriouse azo dye because it catalyze ADHD syndrome, asthma, migraine and thyroid cancer , and other reactions can include blurred vision, itching, purpura, eczema, mutogenetics, and carcinogenetic [11].…”

Partially decomposed PVP as a surface modification of ZnO, CdO, ZnS and CdS nanostructures for enhanced stability and catalytic activity towards sulphamethoxazole degradation

“…In this regard, advanced oxidation procedures (AOPs) have been devised as effective methods, which involve the generation of highly reactive species such as hydroxyl (OH • ) and superoxide (O −• 2 ) radicals for the oxidation and destruction of organic pollutants [6]. Among these, nanosized heterogeneous semiconductors have gained an increasing attention and are now considered as a convenient candidate to substitute conventional methods for wastewater treatment.…”