APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Wenxuan Fang,Chang Sun,Zhengying Chang,Yandi Wang,Xiangxue Wang,Shujun Yu
The highly efficient extraction of uranium from aquatic environments through adsorption method has emerged as a pivotal research focus, particularly within the domains of environmental protection and sustainable development. In this investigation, magnetically recyclable mesoporous ZnFe 2 O 4 @g-C 3 N 4 (ZFOCN) is synthesized by grafting ZnFe 2 O 4 (ZFO) nanospheres onto g-C 3 N 4 (CN) nanosheets through straightforward solution mixing followed by simple calcination, which addresses the challenge associated with the recovery of adsorbents. Characterization analyses and batch experiments reveal that the ZFOCN surface exhibits more negative zeta potential (∼−14.00 mV when pH = 5) alongside reduced contact angle with water (∼43.1° on average). Consequently, ZFOCN demonstrates superior adsorption capacity ( q max = 36.3 mg·g − 1 ), accelerated reaction kinetics (reach equilibrium within approximately 8 h) and heightened selectivity compared with CN and ZFO at pH = 5, which is better fitted by Freundlich isotherm model and pseudo-second-order kinetic model. Notably, the cycle experiment results indicate that it retains high efficiency even after five cycles (∼80 %), showing remarkable recyclability. During the adsorption process, the underlying reaction mechanisms are identified as electrostatic interaction coupled with inner-sphere surface complexation predominantly attributed to Zn–O and Fe–O bonds. Thus, this study not only introduces an effective strategy for fabricating novel magnetic adsorbent but also offers fresh insights into eliminating U(VI), contributing significantly to environmental preservation and sustainable advancement.
研究领域:
环境科学
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材料科学
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纳米技术
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化学工程
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可持续发展
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56261
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IF 2.7
Jiayu Lin,Yongbo Hou,Lailong Ding,Yifan Wang,Jinhu Hu,Xishun Qiu,Chao Wu,Mingliang Ma,Wei Gao
Metal–organic frameworks (MOFs) have garnered significant attention in recent years due to their potential application in flame-retardant polymeric materials. In this work, Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 flame retardants were synthesized via solvothermal and calcination techniques, and their elemental composition and morphologies were thoroughly characterized. The flame retardancy of polyurea (PUA) composites incorporating varying dosages of these flame retardants was evaluated using cone calorimetry tests (CCT). The findings demonstrate that the incorporation of Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 significantly enhanced the flame retardant properties of PUA composites. With the addition of 3 wt% of the flame retardant, the peak heat release rate (PHRR), total heat release (THR), total smoke production (TSP), and total CO yield (TCO) of the PUA composites decreased to 890.82 kW/m 2 , 131.34 MJ/m 2 , 12.30 m 2 , and 2.39 g, respectively, reflecting reductions of 33.59%, 18.59%, 29.40%, and 47.93% compared with pure PUA. The flame-retardant mechanism was systematically analyzed in both the condensed and gas phases. This study provides a robust experimental foundation and novel insights that contribute to the development of advanced flame-retardant coating materials.
研究领域:
材料科学
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阻燃技术
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聚合物工程
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2026
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IF 2.8
Xie Jinsong,Zhang Haojie,Li Yanxin,Liu Tianqi,Du Yaxin
In this work, zinc ferrite nanoparticle-modified tubular graphitic carbon nitride (ZnFe 2 O 4 /g-C 3 N 4 , ZFO/CN) was fabricated via an ultrasound-assisted self-assembly approach. The resulting ZFO/TCN composite features an optimized mesoporous structure, characterized by a specific surface area of 71.35 m 2 /g and average pore size of 10.32 nm, with both values intermediate to those of the individual constituents. The composite exhibited significantly enhanced photocatalytic performance, degrading 93.5% of tetracycline (TC) within 1 h and 98.7% of rhodamine B (RhB) within 20 min. Moreover, the catalyst maintained high photocatalytic activity after four consecutive recycling experiments, demonstrating excellent reproducibility and stability. Free radical trapping experiments indicated that superoxide radicals (·O 2 − ) play a major role in the photocatalytic process. The energy band structure and charge transfer pathways of the catalyst were probed by solid-state ultraviolet diffuse reflectance spectroscopy (UV-Vis DRS) and Mott–Schottky measurements. The separation and transport efficiency of photogenerated charge carriers were systematically evaluated through transient photocurrent response and electrochemical impedance spectroscopy. Accordingly, a Z-scheme heterojunction structure was proposed for the ZFO/CN composite, along with a corresponding photocatalytic mechanism. This study offers new insights for the purification and treatment of wastewater.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Dashi Lei,Juanqin Xue,Xiangyu Peng,Shuhao Li,Qiang Bi,Changbin Tang,Liang Zhang
In this work, direct Z-Scheme photocatalyst (ZnFe 2 O 4 /g-C 3 N 4 ) was employed to purify Cr(VI) and As(III) in wastewater. Results showed that Cr(VI) and As(III) was completely removed in a wide pH range of 3–7 under visible light irradiation. During photo reaction, oxalate enhanced the generation of Fe(II) and CO 2 − , which were beneficial for formation of OH and O 2 − . In photocatalytic system, Fe(II), photogenerated electron, as well as CO 2 − contributed to Cr(VI) reduction, OH and O 2 − were responsible for treatment of As(III). Moreover, ZnFe 2 O 4 /g-C 3 N 4 was easily recycled by magnetic separation, and presented an excellent reuse ability in treatment of Cr(VI) and As(III).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）