SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Zhenhua Niu,Wenjia Luo,Peng Mu,Jian Li
Membrane separation technology has received widespread attention in the field of gas separation because of small footprint, convenient operation and low energy consumption. However, membranes separation are subject to a trade-off between permeance (or permeability) and selectivity. Herein, a novel kind of supported oinic liquid membrane (SILM) was constructed by nanoconfined 1-ethyl-3-methylimidazole acetate ([EMIm][AcO], IL) in the two-dimentional (2D) channels of the g-C 3 N 4 laminated membrane for CO 2 /N 2 and CO 2 /CH 4 separation. Due to the nanoconfinement of ILs in 2D g-C 3 N 4 laminated membrane and the appropriate nanofluidic channels constructed by the g-C 3 N 4 nanosheets, the as-prepared g-C 3 N 4 SILM possesses outstanding permeance and selectivity for CO 2 in separation of CO 2 /N 2 and CO 2 /CH 4 . The experimental result shows that g-C 3 N 4 SILM possesses maximum CO 2 permeance of 992.97 GPU in separation of CO 2 /N 2 and 1160.52 GPU in separation of CO 2 /CH 4 under 1 bar, 25℃. Meanwhile the resultant g-C 3 N 4 SILM shows excellent selectivity for CO 2 /N 2 (52.49) and CO 2 /CH 4 (48.41) respectively. Moreover, the resulted g-C 3 N 4 SILM displays excellent thermal stability and durability. After 60 h test, its separation performance has no obvious change. The findings of our study demonstrate that nanoconfined the IL into the 2D g-C 3 N 4 is a novel strategy for the preparation of high-performance supported liquid membrane for the separation of CO 2 /N 2 and CO 2 /CH 4 .
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Changrong Zhao,Bin Liu,Tingting Zhu,Xuewu Zhu,Xiaoxiang Cheng
Advanced oxidation is an effective method for removing hard-to-degrade organic pollutants from water. In this paper, a novel structure of a single atom Fe anchored g-C 3 N 4 (FeCN) membrane was proposed to remove pollutants from water by coupling membrane technology with photocatalytic and peroxyacetic acid oxidation. The presence of zero-dimensional Fe atoms in FeCN membranes allows for the removal of acetaminophen (APAP) in mobile membrane filtration systems without compromising permeation performance by simultaneously possessing visible photocatalytic capability and peroxyacetic acid (PAA) activation. Existence of inter-membrane domain-limiting conditions led to 100 % degradation of APAP within 10.5 ms, which is 5 orders of magnitude faster than conventional catalytic systems. Notably, photo-generated electrons/holes generated by light and HClO generated by Cl - promote the conversion of Fe(V) and the removal of pollutants during the catalytic process. The spatial separation ability of the membrane catalytic layer surface mitigates the catalyst's passivation by macromolecular organics. Furthermore, surface photocatalysis of the membrane and interlayer catalysis generated by PAA mitigate the surface and interlayer pollutants of the membrane, respectively. This study explores a novel approach for the development of highly efficient atom-catalyzed membrane systems with multiple purposes.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Menglu Zhang,Yueping Bao,Li-an Hou,Xiaoqiang An,Yiran Chai,Chuyang Y. Tang,Yiqun Fan,Yu Yang
This study presents a novel Co 3 O 4 /g-C 3 N 4 functionalized ceramic membrane (Co-CN-M) for emerging contaminants removal by integrating visible-light photocatalysis and peroxymonosulfate oxidation. The membrane was fabricated via in-situ growth of ZIF-67 on g-C 3 N 4 -modified substrates followed by calcination. The Co-CN-M overcomes the conventional trade-off between reactivity and permeability, simultaneously achieving outstanding degradation efficiency ( k = 0.24 min −1 for bisphenol A) and ultrahigh water flux (724 L·m −2 ·h −1 ·bar −1 ). This exceptional performance stems from: (1) the p-n heterojunction at g-C 3 N 4 /Co 3 O 4 interface that enhances charge transfer and Co 2+ /Co 3+ cycling, promoting h + /O 2 ·− -dominated degradation; and (2) a unique honeycomb morphology that facilitates mass transfer via enhanced surface properties and internal nanochannels. Application viability was also demonstrated by excellent antifouling and self-cleaning properties (>70 % flux recovery) and stable long-term (96 h) operation in surface water with minimal cobalt leaching (<0.007 mg·L −1 ). This work offers valuable insights into metal-organic framework (MOF)-based functional membrane fabrication for effective water purification.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Ze Li,Youbin Zheng,Yuze Wang,Zhenjie Hao,Yuhui Huang,Rui Zhu,Dinghao Zheng,Ruixia Zhong,Liang Dong,Jianbing Zang,Pengfei Li,Zheng-Jun Wang
To address the kinetic limitations of CO2 desorption in the urea oxidation reaction (UOR), we develop a urotropine-induced strategy to engineer NiS–Ni3S2@g-C3N4 electrocatalysts. Urotropine, serving as both a structure-directing agent and g-C3N4 precursor, forms a dandelion-like architecture with narrowed columnar fluffs to maximize the surface area. The electronegativity difference between g-C3N4 and NiS–Ni3S2 induces local electron interactions, converting inactive sites to electron-enriched active sites and reducing adsorption energy barriers for CO2 desorption, the rate-limiting step. This catalyst exhibits outstanding UOR performance with a 1.24 V onset potential, 1.34 V to reach 100 mA cm−2, and 90% activity retention over 40 hours, while also demonstrating superior trifunctional activity rivaling IrO2 (OER: η10 = 90.9 mV) and Pt/C (HER: η10 = 13 mV). The urea electrolyzer requires only 1.26 V for 10 mA cm−2 with 48-hour stability. This work provides a breakthrough in designing efficient electrocatalysts through synergistic structural and electronic regulation.
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Yang Zhang,Shanshan Wang,Shitong You,Jun Wang,Jie Wang,Lixia Jia,Hongwei Zhang,Meng Zhang
Given the high demand of photocatalytic membrane filtration processes on both mass transport and light-utilization, this work introduces a novel transparent and highly porous cellulose film (P-RCF) that can serve as a light management layer to enhance the photon utilization of photocatalytic membrane processes. The built-in micron-sized pores act not only as channels for mass transport (filtration resistance ∼5 × 10 10 /m) but also as forward scatterers to endow the film with a high transmission haze (∼77%) without impairing its transmittance (∼90%). A g-C 3 N 4 membrane with attached P-RCF (P-RCF@C 3 N 4 ) exhibited enhanced photocatalytic activity for both tetracycline (TC) oxidation and Cr(VI) reduction. Moreover, by adjusting the incident light angle from 0° to 50°, the observed TC degradation kinetics on P-RCF@C 3 N 4 became more stable than those on the bare g-C 3 N 4 membrane, exhibiting incident-angle-independent properties. This enhanced photocatalytic performance can be attributed to the synergistic effect of refractive-index matching and light scattering within our transparent film, which reduces light reflection and traps the light inside at the photoactive layer, resulting in extended light propagation and utilization. This study provides a novel and versatile strategy for developing light management techniques for advanced photocatalytic membrane systems.
研究领域:
环境科学
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材料科学
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化学工程
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光催化
✓ 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）