Tri‑s‑triazine-Based Porous Organic Polymer for Adsorptive Desulfurization of Model Fuel with Turn-Off Fluorescence Application

• Published in: ACS applied engineering materials Vol. 3; no. 7; pp. 2007 - 2019
• Main Authors: Nilavu, M Christina, Aggarwal, Himanshu, Rajesh, N
• Format: Journal Article
• Language: English
• Published: American Chemical Society 25.07.2025
• Subjects: tri-s-triazine; porous organic polymer; desulfurization; adsorption; fluorescence
• ISSN: 2771-9545; 2771-9545
• DOI: 10.1021/acsaenm.5c00203

Diverse functionalization with high surface area and availability of hetero atoms of porous organic polymers (POPs) makes them a promising material for environmental remediation. A tri-s-triazine-based porous organic polymer was synthesized with a high specific surface area of 258.95 m2 g–1 and investigated for adsorptive desulfurization of model fuel (dibenzothiophene in n-hexane). The triazine-based POP showed a maximum adsorption capacity of 147.22 mg g–1 for DBT at room temperature for isotherm studies of concentrations from 50 to 1500 mg L–1 DBT with a 20 mL volume and 0.1 g of POP adsorbent without oxidation or external functionalization. The POP was thoroughly characterized using techniques such as FTIR, XRD, XPS, 13C NMR, TGA, BET-N2 and FESEM-EDS analyses. The mechanistic features of the adsorptive desulfurization process were corroborated by isotherm, kinetic, and thermodynamic models that affirmed that the reaction is exothermic and spontaneous following pseudo-second-order kinetics fitting with the Langmuir isotherm. The material was reusable for up to five cycles of adsorption and desorption. Along with removal, the POP material exhibited an excellent fluorescent property that was turned off by the addition of the DBT compound. Therefore, the as-synthesized POP could be a promising adsorbent for desulfurization along with sensing application.