JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Cuiting Ding,Miaomiao Zhang,Bohui Lyu,Zheyuan Guo,Na Xing,Xiao Pang,Tao Wu,Yurong Jiang,Runnan Zhang,Ayman El-Gendi,Hong Wu,Zhongyi Jiang
Loose nanofiltration membranes (LNF) with efficient sieving and excellent permeance are desirable for dye/salt separation, and engineering the micropore of the LNF membranes is a promising approach to maximize membrane performance . Herein, we present a highly permeable and sieving polyamide LNF membrane with high porosity and suitable pore size that is prepared by interfacial polymerization using twisted aqueous phase monomer and subsequent alkali-treatment. The large-size, rigid and twisted structure of the adamantane-1,3-diamine effectively inhibits the dense-packing of polymer chain segments, resulting in a polyamide membrane with enhanced porosity and enlarged pore size. The alkali treatment hydrolyzes the partial amide linkage to further enlarge the membrane pore size, increasing the flux while maintaining high dye rejection. The optimum membrane exhibits a high salt/dye selective factor of 735 for Na 2 SO 4 /Evans blue and an excellent water permeance of 87.72 L m −2 h −1 bar −1 . This study is expected to provide a valuable guidance for the targeted design and fabrication of LNF membranes.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Wenji Zheng,Ziheng Li,Yan Dai,Xiangcun Li,Xuehua Ruan,Xiaobin Jiang,Xiujuan Zhang,Gaohong He
The regulation on cage size and CO 2 -philic environment of metal–organic frameworks (MOFs) is essential to improve CO 2 capture. In this work, [Bmim][Tf 2 N] was proposed to position into cages of ZIF-8 to achieve the selective permeation of CO 2 by pore screening and CO 2 adsorption. [Bmim][Tf 2 N] was introduced into cages of ZIF-8 by “adsorption-infiltration” strategy. Due to the strong interaction between [Tf 2 N] − and ZIF-8, the cages present a CO 2 -philic environment, which preferentially attracts CO 2 to enter these cages, ensuring the dissolution selectivity of CO 2 . Besides, the proper cage size tuned by [Bmim][Tf 2 N] provides CO 2 with a faster transport channel due to its smaller average kinetic diameter than N 2 , guaranteeing the diffusion selectivity of CO 2 . Consequently, the CO 2 separation in [Bmim][Tf 2 N]@ZIF-8/Pebax MMMs is intensified. With increasing the [Bmim][Tf 2 N] content in cages of ZIF-8, the pore volume by BET results decreases and the CO 2 adsorption from molecular simulation increases. In response, the CO 2 /N 2 selectivity of [Bmim][Tf 2 N]@ZIF-8/Pebax MMMs is enhanced constantly. Meanwhile, the CO 2 permeability is declined due to the narrowed cage size. All of these results demonstrate the significance of pore screening and CO 2 adsorption induced by [Bmim][Tf 2 N]. Specifically, [Bmim][Tf 2 N] 8 @ZIF-8/Pebax MMM at filler loading of 15 wt% exhibits the CO 2 permeability of 108.3 Barrer and the CO 2 /N 2 selectivity of 86.7, exceeding the 2008 Robeson upper bound. Especially the CO 2 /N 2 selectivity locates at a higher level than those of most reported works, indicating that appropriate tuning of the physicochemical properties within the nanocages of MOFs is significative to improve CO 2 capture.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 29
·2310978
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IF 13
Chenyu Ma,Wenting Feng,Debin Kong,Xinru Wei,Xuelei Gong,Jianhang Yang,Junwei Han,Linjie Zhi
Rechargeable sodium chloride (Na-Cl 2 ) batteries have emerged as promising alternatives for next-generation energy storage due to their superior energy density and sodium abundance. However, their practical applications are hindered by the sluggish chlorine cathode kinetics related to the aggregation of NaCl and its difficult transformation into Cl 2 . Herein, the study, for the first time from the perspective of electrode level in Na-Cl 2 batteries, proposes a free-standing carbon cathode host with customized vertical channels to facilitate the SOCl 2 transport and regulate the NaCl deposition. Accordingly, electrode kinetics are significantly enhanced, and the deposited NaCl is distributed evenly across the whole electrode, avoiding the blockage of pores in the carbon host, and facilitating its oxidation to Cl 2. With this low-polarization cathode, the Na-Cl 2 batteries can deliver a practically high areal capacity approaching 4 mAh cm −2 and a long cycle life of over 170 cycles. This work demonstrates the significance of pore engineering in electrodes for mediating chlorine conversion kinetics in rechargeable alkali-metal-Cl 2 batteries.
研究领域:
电化学
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能源材料
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纳米结构材料
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储能技术
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电极工程
✓ 已验证
DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Jialu Li,Zhonghao Xu,Yangdong He,Sheng Shi,Sihan Ye,Liyun Zhang,Lan Ma,Jian Zhen Ou,Hao Yu
Integrating metal-organic-frameworks (MOFs) into graphene oxide (GO) membranes offers a pathway toward stable and highly selective nanofiltration, yet conventional blending or precursor-diffusion-driven in situ growth compromise structural integrity and is prohibitively slow (∼36 h). Here, we report an electric-field-driven strategy that induces electrophoretic migration of Zn 2+ and 2-methylimidazole precursors, enabling ultrafast (<60 s) synthesis of ZIF-8 within the internal pores of ethylenediamine (EDA)-crosslinked GO-based membranes intercalated by arched graphene (WG). Growth is directed preferentially into high-permeability channels, sequentially plugging dominant and subdominant pores at a rate 2160 times faster than diffusion. This selective pore filling suppresses ZIF-8 overgrowth and minimizes structural disruption, while enhancing rejection performance. The resulting membrane exhibits exceptional dye rejection of 87.11 % (MB), 99.45 % (EBT), 97.39 % (CV), 99.21 % (CR), and 99.37 % (TB), surpassing pristine GO (36.90–91.07 %) and slightly outperforming diffusion-grown counterparts. Meanwhile, the intrinsic 0.7 nm pores of ZIF-8 permit nearly complete salt permeation (rejection <2.73 %), yielding practical dye/salt selectivity >8. Amine-functionalized ZIF-8 further promotes crosslinking, imparting remarkable stability: wet/dry interlayer spacing variation <1 Å and strong resistance to acid/base exposure, hydraulic flushing, and ultrasonication. This electric-field-guided, sub-nanopore engineering strategy thus establishes a generalizable platform for precision separation membranes using diverse substrates and porous framework.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Chun Li,Haoyang Xu,Nan Zou,Ruoting Liu,Yimin Zeng,Ying Zheng
Electrochemical synthesis of urea from CO2 and nitrate offers a sustainable pathway to address both carbon emissions and nitrogen pollution. However, achieving high C–N coupling selectivity remains challenging due to competing hydrogen evolution reactions and insufficient CO2 utilization. Herein, we implement a nanopore-structure engineering strategy to precisely tailor pore length and surface chemistry in metal-free porous carbon frameworks. Oxygen-functionalized surfaces augment CO2 binding affinity via dipole–quadrupole interactions, while elongated pores induce directional CO2 enrichment by establishing a H2O-deficient nanoenvironment that prolongs the residence time of CO2 through capillary gating. This dual modulation of gas–liquid–solid interactions enhances urea selectivity and suppresses hydrogen evolution, yielding a 28% increase in Faradaic efficiency and 12% improvement in urea yield. Our findings propose a novel nanopore-level design concept that shall support the rational development of porous carbon supports across gas–liquid–solid electrocatalytic systems.
研究领域:
电化学
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环境科学
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材料科学
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碳捕集与利用
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）