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<p>In this study, a novel and environmentally friendly catalyst composed of cellulose nanocrystals (CNCs), zeolite and CoFe<sub>2</sub>O<sub>4</sub> was synthesized and characterized using various analyses. The catalyst, named as 05mCCZF was utilized for decolorization of cationic dyes, methylene blue, malachite green and methyl violet 2B by Fenton-like oxidation. Hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) was used as an oxidant. The decolorization efficiency under various operating conditions such as 05mCCZF amount, H<sub>2</sub>O<sub>2</sub> concentration, pH, initial dye concentration, reaction time, presence of NaCl was assessed. The decolorization efficiencies of methylene blue, malachite green and methyl violet 2B were 90.8%, 90% and 79.5%, respectively, under optimal conditions, which included a 05mCCZF dosage of 1&#xa0;g/L, an initial dye concentration of 20&#xa0;mg/L, a pH of 6, H<sub>2</sub>O<sub>2</sub> concentration of 0.0236&#xa0;M, a temperature of 27&#xa0;°C and a reaction time of 45&#xa0;min. The decolorization kinetics of the dyes followed pseudo-first order kinetics and were explained using the Langmuir–Hinshelwood kinetic model. Additionally, the decolorization of dyes in binary solutions was also investigated.</p>

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A novel CNC/CoFe2O4/zeolite composite as a heterogeneous fenton-like catalyst for the decolorization of cationic dyes

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  • 发表日期：

    2026年1月26日

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摘要

In this study, a novel and environmentally friendly catalyst composed of cellulose nanocrystals (CNCs), zeolite and CoFe2O4 was synthesized and characterized using various analyses. The catalyst, named as 05mCCZF was utilized for decolorization of cationic dyes, methylene blue, malachite green and methyl violet 2B by Fenton-like oxidation. Hydrogen peroxide (H2O2) was used as an oxidant. The decolorization efficiency under various operating conditions such as 05mCCZF amount, H2O2 concentration, pH, initial dye concentration, reaction time, presence of NaCl was assessed. The decolorization efficiencies of methylene blue, malachite green and methyl violet 2B were 90.8%, 90% and 79.5%, respectively, under optimal conditions, which included a 05mCCZF dosage of 1 g/L, an initial dye concentration of 20 mg/L, a pH of 6, H2O2 concentration of 0.0236 M, a temperature of 27 °C and a reaction time of 45 min. The decolorization kinetics of the dyes followed pseudo-first order kinetics and were explained using the Langmuir–Hinshelwood kinetic model. Additionally, the decolorization of dyes in binary solutions was also investigated.