In Situ Synthesis of a Stable Fe3O4@Cellulose Nanocomposite for Efficient Catalytic Degradation of Methylene Blue

Abstract

To rapidly obtain a stable Fe3O4@cellulose heterogeneous Fenton catalyst, a novel in situ chemical co-precipitation method was developed. Compared with mechanical activation (MA)-pretreated cellulose (MAC), MA + FeCl3 (MAFC)-pretreated cellulose (MAFCC) was more easily dissolved and uniformly distributed in NaOH/urea solvent. MAFCC and MAC solutions were used as precipitators to prepare Fe3O4@MAFCC and Fe3O4@MAC nanocomposites, respectively. MAFCC showed stronger interaction and more uniform combination with Fe3O4 nanoparticles than MAC, implying that MAFC pretreatment enhanced the accessibility, reactivity, and dissolving capacity of cellulose thus, provided reactive sites for the in situ growth of Fe3O4 nanoparticles on the regenerated cellulose. Additionally, the catalytic performance of Fe3O4@MAFCC nanocomposite was evaluated by using for catalytic degradation of methylene blue (MB), and Fe3O4@MAC nanocomposite and Fe3O4 nanoparticles were used for comparative studies. Fe3O4@MAFCC nanocomposite exhibited superior catalytic activity for the degradation and mineralization of MB in practical applications. After ten cycles, the structure of Fe3O4@MAFCC nanocomposite was not significantly changed owing to the strong interaction between MAFCC and Fe3O4 nanoparticles. This study provides a green pathway to the fabrication of a stable nanocomposite catalyst with high catalytic performance and reusability for the degradation of organic pollutants.

Preparation of a Stable Nanoscale Manganese Residue-Derived FeS@Starch-Derived Carbon Composite for the Adsorption of Safranine T

“…The inset picture in Figure 6 shows that MR–FeS@SC nanocomposite was quickly separated from the aqueous solution by a magnet (external magnetic field) after becoming adsorption-saturated in the ST solution. The magnetic responsivity would be beneficial to the reuse of the adsorbents for applying in wastewater treatment [35].…”

Cellulose derived Pd nano-catalyst for efficient catalysis

“…3e, the binding energy peaks of C 1s in blank cellulose were mostly concentrated at 284.80 eV, 286.50 eV and 287.94 eV corresponding to the sp 2 -C/sp 3 -C, C-O and C]O bonds, respectively. 39 Aer loading of Pd NPs, the binding energy peaks in C-Pd was basically unchanged, indicating that there was no interaction between C and Pd. While in the O 1s spectrum (Fig.…”

Untitled

“…Regarding all adsorbents, the most generally applicable model for describing the MB dye adsorption process is the pseudo-second-order [42]. In order to find out the adsorption process followed pseudo first order kinetics or pseudo-second-order, the following generalized first pseudo order kinetic equation ( 4) and pseudo-second-order equation ( 5) was employed [43].…”