Efficient removal of organic pollutants by material hybrid based on TiO2 and activated carbon from coffee husks
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https://doi.org/10.15625/2525-2518/22026Keywords:
adsoprtion, coffee husk, hybrid material, organic pollutants, photocatalysisAbstract
In this study, hybrid materials composed of TiO2 and activated carbon derived from coffee husks (TiO2-AC) demonstrated high efficiency in removing organic pollutants, including methylene blue (MB), ciprofloxacin (CIP), and trimethoprim (TRI). The activated carbon was produced from coffee production by-products after extracting phenolic compounds and was activated using ZnCl2. The TiO2-AC hybrid materials were synthesized through the solvothermal method. These materials were characterized using various techniques: Brunauer-Emmett-Teller (BET) analysis to determine specific surface area, X-ray diffraction (XRD) to analyze crystal structure, infrared spectroscopy (IR) to identify surface functional groups, transmission electron microscopy (TEM) to examine surface morphology, and zeta potential measurements to assess surface charge. The BET specific surface area of the synthesized materials was 475 m2/g for activated carbon, 88 m2/g for TiO2-AC(1:3), and 48 m2/g for pure TiO2. The adsorption and photocatalytic kinetics of MB, CIP, and TRI degradation were evaluated using the synthesized hybrid materials. The results showed that pH significantly influenced degradation efficiency: the optimal photocatalytic activity for TRI and CIP was observed at pH 7, while MB degradation was most effective at pH 9.
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Kurita Water and Environment Foundation
Grant numbers 23Pvn038 -
Vietnam Academy of Science and Technology
Grant numbers VAST07.01/24-25
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