Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
3 results
Search Results
Item Fabrication of TiO2@ZIF-67 metal organic framework composite incorporated PVDF membranes for the removal of hazardous reactive black 5 and Congo red dyes from contaminated water(Elsevier B.V., 2024) Prabhakar, N.; Isloor, A.M.; Padaki, M.; Fauzi Ismail, A.Novel application of TiO2@ZIF-67 composite incorporated poly (vinylidene fluoride) (PVDF) mixed matrix flat-sheet membranes for treating the water contaminated with hazardous reactive black 5 and congored dyes was the crux of this work. The composite was characterized by FTIR, BET, XRD, zeta potential and particle size, and TGA. The as-synthesized composite was embedded in the PVDF polymeric matrix and flat-sheet-membranes were fabricated adopting the NIPS method followed by the different characterizations like scanning electron microscopy, EDS, elemental mapping, contact angle, atomic force microscopy, surface energy, and XPS. Results of the performance studies showed an enhanced pure water permeability from 150.99 Lm-2h?1 for neat membrane to 261.39 Lm-2h?1 for TZM-2. The reactive black 5 dye was rejected in 97.4 %, 92.2 %, and 84.84 % in acidic, basic and neutral conditions respectively by TZM-2 membrane. Whereas, the PVDF membranes without the composite showed rejections of 83.19 %, 82.5 %, and 72.1 % respectively in acidic, basic, and neutral conditions. The Congo Red dye was rejected in 89.4 %, 95.68 %, and 92.4 % in acidic, neutral and basic conditions respectively by TZM-2 membranes. Whereas, the PVDF membranes without the composite showed rejections of 82.8 %, 91.9 %, and 85.4 % respectively in acidic, neutral and basic conditions. © 2024Item Effective removal of hazardous atrazine and chlorpyrifos by waste PET bottles-derived linker having novel MIL-53(Al)/PMMA-nanofiber incorporated poly(vinylidene) fluoride membranes(Elsevier Ltd, 2025) Prabhakar, N.; Isloor, A.M.; Farnood, R.Synthesis of novel MIL-53(Al)/PMMA nanofiber and its incorporation into PVDF thin-film composite flat-sheet membranes for the rejection of hazardous herbicides and pesticides from water is the crux of this work. Initially, poly (methyl methacrylate) polymer dope solution with MIL-53(Al) dispersed in the matrix was subjected to electrospinning to get a novel nanofiber. The linker terephthalic acid, here was derived from waste PET bottles. Both the MOF and nanofibers were characterized using BET, FTIR, zeta potential, and XRD. The optimized nanofibers were used as additives in the TFC in different weight percentages using synthesized porous PVDF as support. TFC Membranes were analyzed by pure water flux, chlorpyrifos, and atrazine rejection. MPM-2 with 0.05 wt% nanofiber gave a pure water flux of 18.6824 Lm?2h?1. The rejection of chlorpyrifos (a hazardous pesticide) was 86.8 % for MPM-2 membranes and atrazine (a herbicide) gave rejection of 60.48 %. Further, membranes gave excellent antifouling property with FRR of 95.45 %. © 2025 Elsevier LtdItem Efficient removal of hazardous dyes/heavy-metal ions by in-house fabricated poly (vinylidene fluoride) thin-film nanocomposite membranes with functionalized Zr-based metal-organic framework(Elsevier Ltd, 2025) Prabhakar, N.; Isloor, A.M.; Farnood, R.; A.F., A.F.The need for effective solutions to address removal of dyes and heavy metal ions from water has driven significant interest in membrane science and separation technology. This work explores the potential of EDTA-modified MOF-808 as a novel additive to enhance the performance of PVDF supported TFC membranes. The innovation lies in aiming the unique properties of MOF and the chelating properties of EDTA in rejecting the target pollutants. The thin film nanocomposite membranes fabricated in this study with optimized MOF-EDTA loading demonstrated remarkable improvement in hydrophilicity, surface smoothness, porosity, and morphology as confirmed by water contact angle, atomic force microcopy, water uptake, and scanning electron microscopy. The optimized membrane with 0.1wt% MOF-808-EDTA exhibited a water flux of 37.36 Lm-2h-1, a 2.7-fold increment compared to the unmodified one. This was complemented by 98.6%, 91.48%, 88.7%, and 88.96% rejections in hazardous heavy metal ions namely lead, arsenite, cadmium and mercury respectively along with more than 95% rejections for 50ppm of sunset yellow and reactive black 5 dyes. The study also highlights the significant enhancement in antifouling properties with a reduction in irreversible fouling from 41.5% to 5.68% along with a flux rejection ratio of 94.3%. These findings underscore the potential of EDTA-modified MOF as an additive in enhancing the performance and durability of TFC membranes paving the way for efficient and sustainable water treatment. The current study explores an innovative approach for mitigating heavy metal ion and dye pollution in water via fabrication of. © 2025 Published by Elsevier Ltd.