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Updated: Jun 4, 2026

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
Utilizing a crosslinked chitosan Schiff base network-functionalized biochar-MoS2 composite for enhanced adsorption of
Xiaoqian Zhang1, Wanying Li1, Weidong He1
1School of Environmental and Chemical Engineering, Wuyi University, Jiangmen, 529020, China.
None:
The valorization of industrial by-products into high-performance adsorbents offers a sustainable strategy for wastewater treatment. Herein, a composite (CS-MoS2/BC) was fabricated by anchoring molybdenum disulfide (MoS2) nanosheets onto brewers' spent grain-derived biochar and subsequently functionalizing it with a crosslinked chitosan Schiff base network. Characterization using SEM, TEM, XRD, FT-IR, XPS, BET, TGA, and EDS confirmed its successful synthesis and tailored structure. Batch adsorption tests showed that the composite efficiently removed methyl orange, with a maximum Langmuir capacity of 404.6 mg g-1 at 298 K. The kinetics followed a pseudo-second-order model (R2 > 0.99), and thermodynamics indicated a spontaneous and endothermic process. The adsorbent exhibited robust performance over a broad pH range (2-10) and maintained high removal efficiency in the presence of competing ions and real water matrices. It also showed excellent reusability, retaining over 81% of its adsorption capacity after six cycles. The main adsorption mechanisms included electrostatic attraction, hydrogen bonding, n-π, and π-π interactions. This study demonstrates a viable route to convert by-products into efficient and recyclable adsorbents for anionic dye removal.
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