Journal
ADSORPTION SCIENCE & TECHNOLOGY
Volume 2022, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2022/6999213
Keywords
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Funding
- Jiangsu Provincial Postgraduate Scientific Practice and Innovation Project [SJCX21_1722]
- Science and Technology Innovation Project of CHN Energy [GJNY-20-109]
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CaFe2O4 nanomaterials were prepared by rapid combustion method and exhibited good adsorption performance for MB. The adsorption process of MB on CaFe2O4 nanosheets followed pseudo-second-order kinetics and Freundlich isotherm. The adsorption capacity of MB varied with pH value. This study provides a potential application for nanomaterials in dye adsorption.
A rapid combustion process was applied to prepare CaFe2O4 nanomaterials using CaBr2 center dot xH(2)O and Fe(NO3)(3)center dot 9H(2)O as raw materials and CaFe2O4 nanomaterials were characterized by SEM, TEM, VSM, XRD, and FTIR techniques. The results showed that the prepared nanomaterials had a sheet-like structure, and for larger adsorption capacity of dyes, CaFe2O4 nanosheets prepared at 700 degrees C for 2 h with average grain size was 93.3 nm, a thickness of 8.4 nm, and the saturation magnetization of 8.15 emu/g were employed as adsorbate for the removal of methyl blue (MB). The adsorption performance of MB onto CaFe2O4 nanosheets was investigated; CaFe2O4 nanosheets displayed favorable adsorption capacity, and the adsorption conformed to the pseudo-second-order model and the Freundlich model, which demonstrated that the adsorption process of MB on CaFe2O4 nanosheets belonged to multilayer chemisorption process. When the pH value reached 3, the adsorption capacity of MB by CaFe2O4 nanosheets kept maximum value of 478.07 mg/g; and after 5 regenerations, the removal efficiency of MB was reduced to 59.06% of the first time. The electrochemical behavior of MB onto the nanosheets was evaluated through CV in conjunction with EIS. The CaFe2O4 nanosheets revealed a promising prospect for the adsorption of dyes.
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