COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Yuedong Li,Hongdan Wu,Zhihui Zhou,Xianyuan Fan,Wenming Fu,Guoyuan Lei,Qiuyang Huang,Junlin Peng
To address the structural defects and performance limitations caused by nanoparticle aggregation and insufficient interfacial compatibility in conventional thin-film nanocomposite polyamide (PA) nanofiltration membranes, an interfacial engineering strategy was developed to construct organic solvent nanofiltration membranes via the in situ growth of amino-functionalized ZIF-8 (ZIF-8-NH 2 ) nanoparticles. A continuous and well-anchored ZIF-8-NH 2 interlayer was introduced between the polyimide support and the PA selective layer, which effectively mitigated nanoparticle aggregation and enhanced interfacial integrity, thereby promoting the formation of a dense and uniform PA layer. Performance evaluation demonstrated that, at an optimized ZIF-8-NH 2 growth cycle of three, the resulting membrane exhibited a pure-water permeance of 41.3 L·m −2 ·h −1 ·bar −1 and a methanol permeance of 16.9 L·m −2 ·h −1 ·bar −1 , while achieving rejection values of 65.1 % for NaCl and 99.9 % for Na 2 SO 4 . In ethanol, the membrane exhibited a low molecular weight cutoff of 456 g·mol −1 and maintained Congo red rejection above 99 % during continuous operation for 5 days, confirming its structural stability and operational durability.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.5
Jian He,Menghan Lu,Xinggang Wu,Haobo Gou,Ning Zhang,Zhiqiang Xu
The steel industry faces the dual pressures of carbon reduction and ultra-low emissions throughout production, making integrated CO2 capture and deep desulfurization of blast furnace gas essential. Conventional alcohol amine-based scrubbing agents have limitations such as low absorption capacity, regeneration difficulties, and high corrosivity. To address these issues, a CO2, COS (carbon oxysulfide), and H2S integrated high-efficiency removal biphasic absorbent was developed. The novel biphasic absorbent composed of sulfolane (SF), diethanolamine (DEA), 2-amino-2-methyl-1-propanol (AMP), piperazine (PZ), and H2O, achieved a removal rate of over 90% for CO2, COS, and H2S, under the tested conditions, while exhibiting low rich-phase viscosity and acceptable anti-corrosion performance. Optimal regeneration was attained at 110–120 °C, with regeneration efficiencies exceeding 85% and an estimated energy consumption of approximately 2.51 GJ per ton CO2 (about 33.9% lower than 30 wt% MEA), while exhibiting stable cyclic regeneration. Spectroscopic analyses (FTIR, 1H/13C NMR) indicate that H2S undergoes proton transfer to amine sites to form bisulfide containing quaternary ammonium salts, whereas CO2 and COS react with amine functionalities to yield carbamate and thiocarbamate species that preferentially partition into the aqueous-rich phase; sulfolane remains in the organic phase, enabling liquid–liquid separation. This research provides a promising basis for simultaneous pollution control and CO2 mitigation in the steel sector, aligning ultra-low emission targets with decarbonization efforts and offering potential environmental and economic benefits.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Zhengjun Su,Jing Ma,Haiwei Yang,Yunpan Ying,Dahuan Liu,Qingyuan Yang
The development of polyamide nanofiltration membrane is hindered by its low permeability. Rationally designing thin film nanocomposite (TFN) membranes through adding filler to polyamide layer is a promising method for improved nanofiltration performance. However, regulating the morphology and polymerization process of polyamide layer through the design of filler morphology is challenging. In this work, we designed a ZIF-8 nanowire regulated TFN membrane. Different from the reported nanomaterials, the irregular surface of ZIF-8 nanowire is conducive to forming crumpled membrane surface by controlling the interfacial polymerization process. Meanwhile, ZIF-8 nanowire can construct net-like channels in polyamide matrix for improved water permeability. The influence of ZIF-8 nanowire on morphology, chemical property, and desalination performance of TFN membrane were studied. As a result, the optimized TFN-Z2 membrane with ZIF-8 nanowire loading of 0.10 w/v% shows a flux of 6.42 LMH bar −1 , which increased by 189 % than that of the polyamide membrane. Meanwhile, the TFN-Z2 membrane maintained excellent rejection performance for salts (93.60 %, 91.20 %, 91.20 %, and 78.60 % for Na 2 SO 4 , MgSO 4 , MgCl 4 , and NaCl, respectively). The results can provide a foundation for the preparation of more advanced membranes.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 4.3
Han Jiang,Shugang Xu,Zeyuan Liu,Qian Liu,Danhui Wang,Xiuchen Li,Shouhai Zhang,Xigao Jian
Organic solvent nanofiltration (OSN) technology, which can achieve efficient separation of small molecules without phase change and greatly reduce energy consumption, is of great significance in contributing to the goal of ‘carbon neutrality’. The separation performance of OSN membranes directly affects the efficiency of the OSN process. Thin film composite (TFC) membranes prepared by interfacial polymerization (IP) have high ion selectivity and permeability. In this study, TFC membranes were prepared using poly(m-phenylene isophthalamide) (PMIA) as the substrate with excellent thermal and chemical stability, and piperazine (PIP) and trimesoyl chloride (TMC) as the reactive monomers. The effects of different IP conditions on the properties of TFC membranes were systematically studied. The experimental results showed that the optimized TFC membranes exhibited good water flux (57.6 L·m −2 ·h −1 ) and Na 2 SO 4 rejection (99.6 %) with a selectivity of up to 200 for monovalent and divalent salts (NaCl/ Na 2 SO 4 ) at 0.5 MPa. Notably, the membrane demonstrated stable ethanol permeance over a 60-hour continuous test. At the same time, the PMIA-PA TFC NF membrane can remain stable in alcohols, alkanes, ketones, benzenes, as well as acid and alkali solvents after one week, with strong solvent resistance
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DESALINATION
·
2023
·
IF 9.9
Qingyi Wang,Yongping Dong,Junmei Ma,Huimin Wang,Xuping Xue,Chaojie Bai,Mingjie Lin,Lingping Luo,Congjie Gao,Lixin Xue
Polyamide/polyethylene thin film composite (PA/PE-TFC) NF membranes were prepared from reverse-phase interface polymerization (RIP) for improved Mg(II)/Li(I) separation. RIP processes between 1,3,5-benzenetricarbonyl chloride (TMC) in bottom organic phase and piperazine (PIP) in upper aqueous phase were developed to form continuous and intact surface PA separation layers on PE porous substrates thinner than traditional polysulfone (PSF) based substrates. After activation with isopropyl alcohol (IPA), PA/PE-TFC-IPA NF membranes were formed, whose NF performance could be tuned by adjusting the preparation conditions. When TMC concentration was kept at 0.15 % w/v, RIP with low PIP concentration (0.025 wt%) yield PA/PE-TFC-IPA NF membranes with negatively charged surfaces , high Na 2 SO 4 rejection rate (95 % ± 3 %) and water permeance (13–19 L·m −2 ·h −1 ·bar −1 ). RIP with high PIP concentration (0.3 wt%) formed PA/PE-TFC-IPA NF membranes with less negative surfaces, high MgCl 2 rejection rate (94.3 ± 0.7 %), low water permeance (4.8 ± 0.3 L·m −2 ·h −1 ·bar −1 ), and high Mg(II)/Li(I) separation coefficient S Li/Mg (18 ± 1) for 1000 ppm LiCl and MgCl 2 mixed solution. PA/PE-TFC-IPA NF membranes also showed good long-term stability and improved anti-fouling performance for positively charged pollutants, bearing high potential for applications in the lithium extraction processes.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 5
·2221-2229
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IF 3.3
Xin-Jian Jin,Long Tan,Zhi-Qing Zhao,Meng-Chao Li,Qun-Yi Zhou,Jing-Jian Zhang,Tong-Bao Lv,Qiang Deng,Jun Wang,Zheling Zeng,Shuguang Deng,Gui-Ping Dai
Graphene quantum dots (GQDs) are promising for bioimaging applications due to their unique optical properties and good biocompatibility. However, the facile synthesis of GQDs with long-wavelength emission and high quantum yield (QY) under long-wavelength excitation is still a challenge. Herein, dual-emissive GQDs were synthesized via a facile one-pot solvothermal method using 2,7-dihydroxynaphthalene (2,7-DHN) and piperazine anhydrous (PA) as the raw materials. The obtained GQDs exhibited a green-emission band (core state emission) and a red-emission band (surface state emission), which originated from the inner π-conjugated structure and various surface functional groups, respectively. The π-conjugated structure mainly comes from the aromatic rings in 2,7-DHN, and the N–H of PA acts as the main nitrogen source, which is beneficial for the QY. The obtained GQDs showed obvious concentration-dependent optical properties. Importantly, they are able to generate red emission with a high absolute QY of 54.9% in ethanol and 24.9% in water, among the best values of reported GQDs. In addition, the prepared GQDs have good water-solubility, low cytotoxicity, and superior stability against photobleaching. Based on the above advantages, the as-prepared GQDs were successfully applied for labeling HeLa cells in vitro. Therefore, our prepared GQDs demonstrated that they can be an efficient biomarker for fluorescent bioimaging.
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高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Jiaxuan Wang,Zhengxuan Ji,Peiru Fan,Jiaqi Duan,Jiaqing Xiong,Zhe Liu,Yushi Hou,Na Wang
Perfluorobutane sulfonic acid (PFBS) is a kind of anthropogenic recalcitrant contaminant that has posed a threat to drinking water safety and brought widespread public health concerns. Nanofiltration (NF) is an effective way to remove PFBS from drinking water, while the removal is influenced by coexisting ions. To investigate the effects and intrinsic mechanisms of coexisting ions on the rejection of PFBS, poly(piperazineamide) NF membrane was utilized in this work. Results showed that most cations and anions in the feedwater could effectively improve PFBS rejection and simultaneously reduce NF membrane permeability. In most cases, the decrease in NF membrane permeability corresponded to an increase in the valence of cations or anions. When cations (Na + , K + , Ca 2+ , and Mg 2+ ) were present, the rejection of PFBS was effectively improved from 79% to more than 91.07%. Under these conditions, electrostatic exclusion was the dominant NF rejection mechanism. This was also the leading mechanism for 0.1 mmol/L Fe 3+ coexisted condition. As the concentration of Fe 3+ increased to 0.5–1 mmol/L, intensified hydrolyzation would accelerate the formation of the cake layers. The differences in the cake layer characteristics led to the different rejection trends of PFBS. For anions (SO 4 2− and PO 4 3− ), both sieving effects and electrostatic exclusion were enhanced. As anionic concentration raised, the NF rejection of PFBS increased to above 90.15%. By contrast, the effect of Cl − on PFBS rejection was also affected by coexisting cations in the solution. The dominant NF rejection mechanism was electrostatic exclusion. Accordingly, it is suggested that the usage of negatively charged NF membranes could facilitate the efficient separation of PFBS under ionic coexisting conditions, thereby ensuring the safety of drinking water.
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PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Li Jingjing,Cui Yihan,Lu Yi-Lin,Zhang Yunfei,Zhang Kaihuang,Gu Chaonan,Wang Kaifang,Liang Yujia,Liu Chun-Sen
The dynamic regulation of supramolecular chirality in non-equilibrium systems can provide valuable insights into molecular self-assembly in living systems. Herein, we demonstrate the use of chemical fuels for regulating self-assembly pathway, which thereby controls the supramolecular chirality of assembly in non-equilibrium systems. Depending on the nature of different fuel acids, the system shows pathway-dependent non-equilibrium self-assembly, resulting in either dynamic self-assembly with transient supramolecular chirality or kinetically trapped self-assembly with inverse supramolecular chirality. More importantly, successive conducting of chemical-fueled process and thermal annealing process allows for the sequential programmability of the supramolecular chirality between four different chiral hydrogels, affording a new example of a multistate supramolecular chiroptical switch that can be recycled multiple times. The current finding sheds new light on the design of future supramolecular chiral materials, offering access to alternative self-assembly pathways and kinetically controlled non-equilibrium states.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Ying-Peng Zhang,Wei-Ya Niu,Yun-Shang Yang,Zu-Feng Zhang,Yi-Zhen Yuan,Hui-Chen Guo,Hong-Rui Zhang
A smart low-molecular-mass organic gelator based on naphthalene-pyrazoline has been designed and synthesized. The gelator G can form a thermo reversible stable gel in tert -butanol, cyclohexane, cyclohexanol, and DMSO through self-assembly, it emits blue and yellow-green fluorescence under ultraviolet radiation. Notably, it has multiple stimulus responses of light, heat, shock and ion. In addition, it could act as an efficient fluorescent probe for the selective sensing of Cu 2+ in the solution containing water. The detection limit of Cu 2+ in THF deionized aqueous solution (V:V = 9:1) is 5.65 × 10 −8 M. The complex ratio of G to Cu 2+ is 1:1. In addition, the G has good biocompatibility in living cells.
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高影响因子
AICHE JOURNAL
·
2023
·
IF 3.7
Lulu Liu,Yuxuan Liu,Yinhua Wan,Weijie Song,Hongwei Lu,Jianquan Luo
Surface grafting has been widely used to tune hydrophilicity and chargeability of nanofiltration membranes for reducing membrane fouling potential. However, surface grafting typically leads to a significant pore narrowing and resultant permeability loss, and monocharged surface still struggles to resist mixed foulants with different charges. Herein, ionic liquid (IL)-ethanol (EtOH) solution containing polyethyleneimine (PEI) is used to rearrange the nascent polyamide layer. The high affinity of IL to the PA layer and the low diffusion steric hindrance of EtOH contribute to the polyamide swelling and PEI deep grafting, during which the “self-regulation” effect (larger pores would be filled with more PEI molecules) narrows the pore size distribution and enhances hydrophilicity. The nearly charge-neutral and smooth separation layer shows impressive antifouling capacity to hydrophobic macromolecules and mixed charged molecules, along with long-term operating stability for real wastewater treatment. This study emphasizes the importance of solvent properties on the membrane grafting behavior.
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高影响因子
DESALINATION
·
2022
·
IF 11.211
Xiaowen Huo,Zhaojing Jing,Haitao Wang,Na Chang
Nanofiltration membranes based on polyamide (PA) are widely used in fields such as brackish water desalination and drinking water purification due to their excellent retention of multivalent salts. However, uncontrolled and extremely fast polymerization easily produces thicker PA layers, which reduces permeability. Moreover, smooth support layer usually leads to PA layers with low roughness, which is not benefit for improving of flux. Based on these aspects, an innovative method of co -regulating interfacial polymerization based on anionic surfactant sodium dodecyl sulfate (SDS) and carbonized-UIO-66 (C-UIO-66) nanoparticles has been reported. The adsorption of anionic surfactant on the surface of C-UIO-66 slows down the diffusion rate of aqueous monomer and helps to form thin PA layer (<33 nm) which is thinner than the original thin film composite (TFC) membrane (144.29 ± 17.62 nm). Besides, C-UIO-66 nanoparticles with different sizes are deposited on the surface of the support layer, providing rougher surface for interfacial polymerization. Due to the irregular surface of SDS/C-UIO-66 intermediate layer, the prepared PA layer has folded structure. Compared with original TFC membrane, the preferred thin film nanocomposite (TFN) nanofiltration membrane possesses permeation flux of 58.59 L·m −2 ·h −1 , which increased by 114.3 % together with the maintaining the rejection rate of Na 2 SO 4 above 96 %.
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Membranes
·
2021
·Vol. 12
·期 1
·57
·
IF 4.106
Huan Liu,Quan Li,Benqiao He,Zhengguang Sun,Feng Yan,Zhenyu Cui,Jianxin Li
The efficient separation of Sr2+/Mg2+through nanofiltration (NF) technology is a great challenge because Sr2+and Mg2+ions are congeners with the same valence and chemical properties. In this work, an NF membrane under an electric field (EF) was successfully employed to separate Mg2+and Sr2+ions for the first time. The effects of current densities, Mg2+/Sr2+mass ratios, pH of the feed, and coexisting cations on separation performance were investigated. Dehydration of Sr2+or Mg2+ions under EF was proved by molecular dynamics simulation. The results showed that a high-efficient separation of Mg2+/Sr2+was achieved: Mg2+removal of above 99% and increase in Sr2+permeation with increasing EF. A separation factor reached 928 under optimal conditions, far higher than that without EF. The efficient separation of Mg2+/Sr2+ions was mainly due to rejection of most Mg2+ions by NF membrane and in situ precipitation of partly permeated Mg2+ions by OH−generated on the cathode under EF. Meanwhile, preferential dehydration of Sr2+ions under EF due to lower hydration energy of Sr2+compared with Mg2+resulted in an increase of permeation of Sr2+ions. This work provided a new idea for separation of congener ions with similar valence and chemical properties.Keywords:ENF process;congener ions;dehydration;efficient separation
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高影响因子
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