Controlled Removal of Organic Dyes from Aqueous Systems Using Porous Cross-Linked Conjugated Polyanilines

Abstract

Porous organic materials, as a broad class of functional materials, offer a promising route for low-cost purification of contaminated wastewaters. We have synthesized a range of highly cross-linked conjugated porous polyanilines and optimized their porosity and water dispersibility by tuning reactant feed ratios, previously unreported in the synthesis of such networks. To demonstrate their ability to adsorb model dyes used in the textile industry, we exposed the networks to a range of cationic aromatic dyes, leading to absorption capacities of >100 mg/g, reported for the first time with respect to polyaniline networks. The versatility of the networks was further demonstrated by the preparation of gel composites, producing active gels for efficient and facile removal and recycling, ideal for real-world applications. Finally, chemical modifications of the networks were undertaken to target the removal of model anionic organic dye pollutants, showing the wide applicability of our approach.

Conjugated Microporous Polymers for Catalytic CO2 Conversion

“…[36][37][38][39][40] CMPs are proving to be a versatile and powerful tool for addressing a wide range of environmental and energy related challenges. As a result, they are used in a variety of practical applications, including as adsorbents, [41][42][43] heterogeneous catalysts, [9,44,45] energy storage, [46,47] luminescent materials [48] and light harvesting. [49] CMPs offer numerous advantages over other porous materials such as zeolites, covalent organic frameworks (COFs), metal-organic frameworks (MOFs), and activated carbons.…”

“…CMPs are proving to be a versatile and powerful tool for addressing a wide range of environmental and energy related challenges. As a result, they are used in a variety of practical applications, including as adsorbents, [ 41 , 42 , 43 ] heterogeneous catalysts, [ 9 , 44 , 45 ] energy storage, [ 46 , 47 ] luminescent materials [ 48 ] and light harvesting. [ 49 ]…”

A sulfonate ligand-defected Zr-based metal–organic framework for the enhanced selective removal of anionic dyes

“…However, the rapid industrialization of many sectors has caused the increased discharge of synthetic organic dyes in wastewater. [1][2][3][4] These dyes have intrinsic toxicity, low biodegradability, and hinder sunlight penetration, leading to numerous detrimental impacts on both aquatic ecosystems and living bodies. 5,6 Hence, the need for effective treatment of wastewater effluent containing dye molecules has drawn considerable attention in science and technology.…”