Highly Efficient Organic Dyes Capture Using Thiol-Functionalized Porous Organic Polymer.

Area of Science:

• Materials Science
• Environmental Chemistry
• Polymer Chemistry

Background:

• Developing efficient adsorbents for cationic dyes like methylene blue (MB) and malachite green (MG) is crucial for water treatment.
• Existing materials often face limitations in adsorption capacity, kinetics, or reusability.

Purpose of the Study:

• To synthesize and characterize a novel triptycene-based porous organic polymer functionalized with thiol groups (TPP-SH).
• To evaluate the efficiency of TPP-SH in capturing MB and MG from aqueous solutions.
• To assess the adsorption capacity, kinetics, and recyclability of the developed material.

Main Methods:

• Postmodification of a triptycene-based porous organic polymer (TPP) to introduce abundant thiol groups, creating TPP-SH.
• Characterization of TPP-SH for surface area, porosity, and thermal stability.
• Adsorption experiments to determine the capacity and kinetics for MB and MG removal using the Langmuir model.

Main Results:

• TPP-SH demonstrated high surface area, good porosity, and thermal stability.
• Maximum adsorption capacities for MB and MG were 1146.3 and 689.6 mg g^-1, respectively, exceeding many reported materials.
• Fast adsorption kinetics were observed, with significant MB and MG uptake.
• TPP-SH exhibited good recyclability over at least five adsorption-desorption cycles.

Conclusions:

• The synthesized TPP-SH is a highly effective adsorbent for cationic dyes MB and MG.
• The material offers superior adsorption capacity, rapid kinetics, and excellent recyclability.
• TPP-SH presents a promising new avenue for developing high-performance green adsorbents for water decontamination.