Efficient removal of rhodamine B and methylene blue from water using polyurethane based porous material

Abstract

Here the thermally catalyzed azide‐alkyne click reaction was invoked for synthesis of functional triazole. The formed triazole was invoked to engineer polyurethane as water immiscible material. The synthesized functional triazole and polyurethane were well characterized using spectroscopic techniques—nuclear magnetic resonance (NMR), electrospray ionization mass spectrum (ESI MS), and attenuated total reflectance Fourier transform infrared (ATR‐FTIR) accordingly. The N2 adsorption–desorption isotherms confirmed the material to be mesoporous in nature with a surface area of 12.89 m2/g, pore volume of 0.085 cc/g, and pore radius of 7.14 nm. The characterized triazole material can be crucial with properties related to antifungal responses and UV absorption. The polyurethane material showed adsorption of amphiphilic dye—rhodamine (RH B) and methylene blue (MB). It was selective to release of rhodamine B (RH B) quite efficiently. The recycling of polyurethane reported up to cycle four revealed efficient adsorption‐release.

Soaking pretreatment of hydrogel adsorbent in distilled water to enhance efficiency of adsorption onto low concentration dye

“…The high regeneration rate and reusability of an adsorbent are considered to be an important indices for its commercial utilization feasibility. [31,32] Accordingly, adsorption characteristics of adsorbents under different conditions are observed by comparing the adsorption capacity or removal rates. A reusability study was also performed in the final experiment.…”