Prof. Min Song | Publications & Academic Profile | SinoGreenTech

Research Publications & English Decoded Briefs

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Chinese Journal of Environmental Engineering•2026•DOI: 10.12030/j.cjee.202510089

Removal Mechanisms of Fe3O4@MIL-100(Fe) for Microplastics in Water

Microplastics (MPs) are frequently detected in various water bodies, posing increasing environmental risks. This study synthesized magnetic Fe3O4@MIL-100(Fe) microspheres via an in-situ one-step hydrothermal method and investigated their adsorption removal mechanisms for polystyrene (PS) and polylactic acid (PLA) microplastics. The composite exhibited a core-shell structure with a high specific surface area of 848.6 m2·g−1. Adsorption kinetics showed that PLA followed a pseudo-second-order model, while PS fitted both pseudo-first-order and pseudo-second-order models. Equilibrium data for both MPs were well described by the Freundlich isotherm. Removal efficiencies for PLA and PS increased from 58.18% and 49.66% to 98.90% and 98.58%, respectively, as pH decreased, and from 64.24% and 21.58% to 97.05% and 94.63% with increasing ionic strength. The removal mechanism involved synergistic physical-chemical interactions: hydrogen bonding dominated for PLA, with some complexation, while π–π interactions and hydrogen bonding were primary for PS. The material demonstrated excellent reusability over multiple cycles. These findings highlight the potential of Fe3O4@MIL-100(Fe) for efficient removal of MPs from water, offering a novel approach for controlling emerging contaminants.

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SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3606-6

P-doping optimized electronic metal-support interaction in Os/WC boosts H* transfer for enhanced alkaline hydrogen evolution

Transition-metal carbides (TMCs) have emerged as promising alternatives to platinum-based catalysts in the electrocatalytic hydrogen evolution reaction (HER), showcasing substantial potential for sustainable energy applications. Herein, a rapid microwave-plasma-assisted synthesis strategy (60 s) is employed to fabricate phosphorus-doped tungsten carbide (WC) uniformly loaded with osmium (Os) nanoclusters (Os/P-WC). The resulting Os/P-WC catalyst exhibits exceptional HER performance, achieving a benchmark current density of 10 mA cm−2 with low overpotentials of 20, 51, and 11 mV in alkaline, acidic, and alkaline seawater electrolytes, respectively. Furthermore, it maintains stable operation for 100 h at both 10 and 500 mA cm−2 in alkaline electrolyte. In-situ Raman spectroscopy, in-situ electrochemical impedance spectroscopy (EIS), and hydrogen binding energy (HBE) experiments confirm that the electronic metal-support interaction (EMSI) generates electron-enriched Os active sites. These sites facilitate the adsorption and dissociation of water, optimize the adsorption and desorption of hydrogen intermediates (H*), and thereby significantly accelerate reaction kinetics. This work presents a novel design and synthesis strategy for developing highly active electrocatalysts with low precious metal loading for H2 evolution applications.

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