Pradhan, Padmapani and Dey, Shaon and Manna, K and Panda, A B and Pal, Sagar (2025) In situ synthesis of a photocatalyst using TiO2 QDs-immobilized functionalized galactomannan for degradation of organic pollutant. Journal of Water Process Engineering, 69 .
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Abstract
TiO2 based photocatalysts are highly efficient systems in degrading organic contaminants. In the present work, an in-situ approach has been adopted to synthesize TiO2 quantum dots (QDs) with simultaneous grafting of methacrylic acid (MAc) on guar gum (GG), to develop a hybrid composite (GG-g-PMAc-@-TiO2 QDs) for photocatalytic degradation of toxic organic contaminant. The in-situ synthesis and proper dispersion of TiO2 QDs over polymer surface is aided by the stabilization through electrostatic interaction and hydrogen bonding between the acid functionality of the grafted PMAc chains and TiO2 QDs. The structural and morphological properties of GG-g-PMAc-@-TiO2 QDs have been thoroughly investigated by various characterization techniques. The HR-TEM analysis reveals the average particle size of TiO2 QDs is similar to 3.9 nm. The optical properties of the composite have been studied by UV, PL and TCSPC analyses. Moreover, the developed nanohybrid GG-g-PMAc-@-TiO2 QDs photocatalytically degrades ciprofloxacin (CIP) efficiently (similar to 94 % degraded within 3 h). The HR-MS analysis predicts the various degraded CIP fragments that have further been used to establish probable degradation mechanism.
Item Type: | Article |
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Official URL/DOI: | http://10.1016/j.jwpe.2024.106617 |
Uncontrolled Keywords: | Photocatalyst, polymeric nanohybrid, quantum dot, wastewater, guar-gum, quantum dots, ciprofloxacin degradation, methylene-blue, nanoparticles, adsorption, anatase |
Divisions: | Material Science and Technology |
ID Code: | 9683 |
Deposited By: | HOD KRIT |
Deposited On: | 24 Dec 2024 16:55 |
Last Modified: | 24 Dec 2024 16:55 |
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