Sustainable Phosphate Remediation via Hierarchical Mg-Fe Layered Double Hydroxides on Magnetic Biochar from Agricultural Waste DOI Creative Commons
Xiuling Li, Lei Xin,

Yuhan Peng

et al.

Magnetochemistry, Journal Year: 2025, Volume and Issue: 11(4), P. 27 - 27

Published: April 1, 2025

Addressing aquatic phosphate pollution requires advanced materials that combine high selectivity with recyclability. Here, we present a hierarchically structured composite integrating Mg-Fe layered double hydroxides (LDHs) magnetic biochar derived from mulberry branches—an abundant agricultural byproduct. Through hydrothermal synthesis, the achieves unique architecture combining Fe3O4-enabled recovery (2.63 emu·g−1 saturation) LDHs’ anion exchange capacity and biochar’s porous network. Systematic characterization reveals capture mechanisms dominated by hydrogen bonding through deprotonated carboxyl groups, inner-sphere complexation metal oxides, interlayer exchange, enabling 99.22% removal at optimal conditions (pH 6, 25 °C). Crucially, material demonstrates exceptional over competing Cl− NO3− ions while maintaining 87.83% efficiency after three regeneration cycles via alkaline treatment. Kinetic thermodynamic analyses confirm chemisorption-driven uptake aligned pseudo-second-order kinetics (R2 > 0.9998) Langmuir monolayer adsorption (7.72 mg·g−1 capacity). This waste-derived establishes sustainable paradigm for eutrophication control, merging selective sequestration energy-efficient circular water treatment applications.

Language: Английский

Superhydrophilic Bimetallic Sulfide Nanosheets for Hydrogen Production Using Urea-Assisted Electrocatalytic Water Splitting DOI
Yuqian Bao, Ying Yang,

Jiayao Jiang

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Electrolysis of industrial and human urea-containing wastewater is beneficial to the environment, using urea oxidation reaction (UOR) instead oxygen evolution (OER) saves energy effectively improves performance electrocatalytic hydrolysis for hydrogen production. The Co9S8/Ni3S2 nanosheet structures on nickel foam (NF) are an active hydrophilic catalyst UOR (HER). This electrocatalyst needs a low overpotential 136 mV attain 10 mA·cm–2 HER, it can reach current density 100 at working potential 1.36 V vs RHE. introduction Co element regulates both morphology electronic structure. former results in Co9S8/Ni3S2/NF offering more sites with larger specific surface area morphology, while latter drives S move direction binding energy. examination cobalt sulfides as bifunctional energy-efficient electrolytic H2 production purification urea-rich harmless has significantly advanced due this work.

Language: Английский

Citations

0
Sustainable Phosphate Remediation via Hierarchical Mg-Fe Layered Double Hydroxides on Magnetic Biochar from Agricultural Waste DOI Creative Commons
Xiuling Li, Lei Xin,

Yuhan Peng

et al.

Magnetochemistry, Journal Year: 2025, Volume and Issue: 11(4), P. 27 - 27

Published: April 1, 2025

Addressing aquatic phosphate pollution requires advanced materials that combine high selectivity with recyclability. Here, we present a hierarchically structured composite integrating Mg-Fe layered double hydroxides (LDHs) magnetic biochar derived from mulberry branches—an abundant agricultural byproduct. Through hydrothermal synthesis, the achieves unique architecture combining Fe3O4-enabled recovery (2.63 emu·g−1 saturation) LDHs’ anion exchange capacity and biochar’s porous network. Systematic characterization reveals capture mechanisms dominated by hydrogen bonding through deprotonated carboxyl groups, inner-sphere complexation metal oxides, interlayer exchange, enabling 99.22% removal at optimal conditions (pH 6, 25 °C). Crucially, material demonstrates exceptional over competing Cl− NO3− ions while maintaining 87.83% efficiency after three regeneration cycles via alkaline treatment. Kinetic thermodynamic analyses confirm chemisorption-driven uptake aligned pseudo-second-order kinetics (R2 > 0.9998) Langmuir monolayer adsorption (7.72 mg·g−1 capacity). This waste-derived establishes sustainable paradigm for eutrophication control, merging selective sequestration energy-efficient circular water treatment applications.

Language: Английский

Citations

0