研究目的
To compare the behavior of Chitosan-Gelatin based hydrogels with their nanocomposite ion exchangers synthesized under microwave conditions for the adsorption and photodegradation of cationic dyes.
研究成果
The CH-GEL/ZSPNC (MW) ion exchanger showed a significant increase in ion exchange capacity and photocatalytic degradation efficiency for methylene blue dye. The non-linear forms of kinetic and isotherm models provided better fitting to the experimental data. The nanocomposite can be reused efficiently up to four cycles.
研究不足
The study is limited to the photocatalytic degradation of methylene blue dye under specific conditions. The reusability of the nanocomposite ion exchanger decreases after successive cycles.
1：Experimental Design and Method Selection:
The study involved the synthesis of Chitosan-Gelatin based hydrogels and their modification to nanocomposite ion exchangers by incorporating zirconium (IV) selenophosphate under microwave conditions. The photocatalytic degradation of methylene blue (MB) dye was investigated under solar light.
2：Sample Selection and Data Sources:
The samples included Chitosan-Gelatin hydrogels and their nanocomposite ion exchangers. The data was collected through various characterization techniques and photocatalytic degradation experiments.
3：List of Experimental Equipment and Materials:
Materials included chitosan, gelatin, zirconium oxychloride, sodium selenite, orthophosphoric acid, methylene blue, and glutaraldehyde. Equipment included a microwave oven, FTIR spectrophotometer, XRD, FE-SEM, HRTEM, AFM, BET analyzer, and UV-VIS spectrophotometer.
4：Experimental Procedures and Operational Workflow:
The synthesis involved dissolving chitosan and gelatin, mixing with cross-linking agent, and microwave irradiation. The nanocomposite was characterized and tested for photocatalytic activity under solar light.
5：Data Analysis Methods:
The data was analyzed using non-linear and linear forms of Langmuir and Freundlich isotherms, and pseudo-first-order kinetic models.
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HRTEM
The Tecnai G2 20 (FEI) S-Twin
FEI
Used to envisage the morphology of the nanocomposite ion exchanger.
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AFM
Multimode Bruker Atomic Force Microscope
Bruker
Used to explore the topology and geometry of the nanocomposite ion exchanger.
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FTIR spectrophotometer
Perkin Elmer spectrophotometer
Perkin Elmer
Used to investigate the structural information of the synthesized materials.
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XRD
panalytical X’Pert Pro multipurpose diffraction (MPD)
panalytical
Used to study the crystalline nature of the synthesized materials.
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FE-SEM
Nova Nano FE-SEM 450 FEI
FEI
Used to study the morphological features of the ion exchanger with elemental analysis.
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microwave oven
Used for the synthesis of hydrogels and nanocomposite ion exchangers under microwave conditions.
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TGA/DTA thermal analyzer
SII-EXSTAR 6000
SII
Used to conduct thermal studies of the synthesized materials.
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UV-VIS spectrophotometer
Systronics Double Beam UV-VIS Spectrophotometer (2201)
Systronics
Used for UV-VIS analysis of adsorption studies.
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BET analyzer
Used for calculation of surface area (N2 physisorption) of the synthesized samples.
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