DESALINATION
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2026
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IF 9.9
Wande Ding,Wenzhe Chen,Qianwen Zhang,Zhaoquan Gan,Changchuan Guo,Libo Xu,Shan Wang
Acid-activated palygorskite with tunable electronegativity regulates IP kinetics. • MD simulations reveal synergistic steric hindrance and electrostatic MPD inhibition. • Stopped-flow analysis uncovers “initial inhibition, subsequent promotion” mechanism. • The TFN-ACP 8,0.02 membrane achieves 75.27 L/m 2 ·h water flux with 99.39% rejection. • Simple acid treatment of Pal offers a scalable route to high-performance TFN-RO. Nanoparticle-mediated interfacial polymerization (IP) offers a promising route to high-performance reverse osmosis membranes, and optimizing the intrinsic properties of nanomaterials to better regulate the IP layer structure has become a critical research direction. In the present study, palygorskite (Pal) was modified via acid activation to tailor its particle size and surface charge, systematically decoupling the roles of steric hindrance, electrostatic interaction, and adsorption capacity during the IP process. By tuning the acid treatment duration (4–10 h), the particle size, specific surface area, and zeta potential of Pal were effectively modulated across wide ranges (219–311 nm, 130–200 m 2 /g, −17.6 to −26.0 mV). Combining molecular dynamics simulations, UV–vis diffusion monitoring, and stopped-flow kinetic analysis, a quantitative structure-property relationship between nanofiller electronegativity and MPD diffusion inhibition was established. The optimized acid activation (8 h) endowed the TFN membrane with a 2.52-fold enhancement in water flux (75.27 L/m 2 ·h) while maintaining a high NaCl rejection of 99.39%. This work provides mechanistic insights and a practical material strategy for designing next-generation TFN membranes through simple surface regulation of naturally abundant clay minerals.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Guanzheng Zhuang,Zhengxi Liang,Jiajun Zhang,Bin Xiao,Jixing Fan,Wenxiao Fan,Meiqing Chen,Weirui Chen,Maguy Jaber,Peng Yuan
Gel stability is decoupled from surface charge modulation by electrolytes. • Physical entanglement of fibers dominates over electrostatic interactions. • Salt induces a transition from fine networks to massive fiber bundles. • Bundling triggers a shift from anti-thixotropic to thixotropic behavior. • High surface area keeps water dynamics constant despite network coarsening. Palygorskite exhibits unusual colloidal stability and favorable rheological properties in saline environments, yet the mechanisms governing its response to electrolytes over a wide concentration range remain unclear. We investigate the effects of mono- (Na + , K + ) and divalent (Ca 2+ , Mg 2+ ) cations across 10 −4 to 1 mol/L. The results show that the macroscopic gel stability of 5 wt% palygorskite dispersions remain unchanged across all salt conditions, despite pronounced electrolyte-dependent changes in surface charge, including charge reversal in divalent systems. Cryo-scanning electron microscopic results reveal a progressive transition from fine fiber networks to coarse bundle-based structures, with bundling occurring at lower concentrations for divalent salts. These structural changes influence rheological behavior, leading to enhanced viscosity at low-to-moderate salt concentrations and a shift from weak anti-thixotropic behavior to weak thixotropic behavior at high salinity. In contrast, low-field nuclear magnetic resonance shows that the water confinement remains under pervasive surface control despite large microstructural rearrangements. These findings support a decoupling between nanoscale surface-charge modulation and macroscopic gel stability, and indicate that physical entanglement and topological connectivity, rather than electrostatic interactions alone, govern the salt resistance of concentrated palygorskite dispersions. This work provides a mechanistic framework for the design of salt-resistant fibrous clay colloids for applications in complex saline environments. Download: Download high-res image (226KB) Download: Download full-size image
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PACKAGING TECHNOLOGY AND SCIENCE
·
2026
·
IF 4.7
Wenting Gao,Bin Mu,Fangfang Yang,Yalong Li,Yu Tang,Zhihe Luo,Aiqin Wang
The potential of chitosan (CS) films for the preservation has been explored, and it is recognized as one of the promising approaches to enhancing the comprehensive capability of CS films for food control after incorporation of functional nanofillers. Herein, Rhodiola rosea extract/ZnO/palygorskite (RRE/ZnO/Pal) nanocomposites were facilely prepared and incorporated into CS matrix to obtain RRE/ZnO/Pal/CS (RZPC) composite films, in which ZnO/Pal nanocomposites were synthesized by a green phyto-mediated method followed by loading of R. rosea extract via a semi-dry grinding process to form organic/inorganic bioactive nanocomposites. The composite films exhibited significantly enhanced antioxidant, antibacterial, mechanical and UV-shielding properties compared with the pure CS film, as well as the maximum scavenging activities on hydroxyl radicals and 2,2-diphenyl-1-picrylhydrazine radicals of composite films were 92.85% ± 1.59% and 56.89% ± 0.56%, respectively. The antibacterial ratios of composite films containing 6.25% of RRE/ZnO/Pal nanocomposites were 94.92% ± 2.67% and 95.48% ± 2.08% for E. coli and S. aureus , respectively. In addition, the RZPC films effectively delayed browning and deterioration of bananas. This study provides a green method for construction of bioactive nanocomposites and new strategy to design multifunctional CS films for food preservation based on the synergistic effect of organic and inorganic components.
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高影响因子
APPLIED CLAY SCIENCE
·
2022
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IF 5.907
Qiushi Jiang,Zhaolian Han,Nan Qu,Lianzhi Sun,Yafeng Yuan,Yating Ren,Zhiqiang Cheng
A low-cost palygorskite (Pal)/MIL-101(Fe) was prepared by solvothermal method and calcined under nitrogen protection to form the magnetic derivant Pal/MIL-101(Fe)-400, the successful combination of which was confirmed. The band gap (1.47 eV) of Pal/MIL-101(Fe)-400 was lower than 2.25 eV of Pal/MIL-101(Fe), indicating a significant improvement in light absorption performance. In addition, Pal/MIL-101(Fe)-400 exhibits stronger photocurrent response and lower impedance due to the formation of Fe 3 O 4 clusters with high electrical conductivity and new active centers by calcination. The prepared Pal/MIL-101(Fe)-400 can achieve 90 mg/g RhB removal completely, which is better than 77.0% adsorption of MIL-101(Fe) and 67.2% adsorption-photocatalytic of Pal/MIL-101(Fe), which also shows superparamagnetism properties and excellent cyclic stability. In addition, Pal/MIL-101(Fe)-400 mainly relies on the action of peroxy radical to oxidize organic pollutants, which is different from Pal/MIL-101(Fe). This work provides a new perspective for the construction of magnetic MOF multifunctional materials for the efficient treatment of pollutants in water.
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高影响因子
CLAYS AND CLAY MINERALS
·
2022
·Vol. 70
·期 3
·450-459
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IF 2.207
Wang Yan,Zhuang Yu,Wang Sheng,Liu Yin,Kong Lingbing,Li Jianjun,Chen Huayong
In order to develop high-performance adsorbents to remove toxic methylene blue (MB) from wastewater, palygorskite (Plg) was utilized as a template to prepare palygorskite/carbon (Plg/C) composites by using a hydrothermal reaction in the presence of glucose. The porous Plg/C composites were then activated with ZnCl 2 . The effects of the dose of the activator and the activation temperature on the crystal structure, micro-morphology, specific surface area, and adsorption performance of the porous Plg/C composites were studied systematically here. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicated that the crystal structure of Plg was destroyed during the activation process and irregular porous carbon was closely attached to the residual aluminosilicate skeleton. The activation was optimized at 400°C with a ZnCl 2 :Plg/C impregnation ratio of 2:1. The sample had a specific surface area of 1497.88 m 2 /g, together with a total pore volume and micropore volume of 1.0355 and 0.5464 cm 3 /g, respectively. The MB adsorption capacity was 381.04 mg/g. Such inexpensive, high-performance, porous Plg/C composites could find potential applications in wastewater treatment.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 3
·4461-4473
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IF 4.223
Shao Jiang,Zhang Yi,Liu Zongtang,Fei Zhenghao,Sun Yufeng,Chen Ziyan,Wen Xiaoju,Shi Weizhong,Wang Dandan,Gu Chenggang
Organic palygorskite (OP)–supported Pd/Fe nanoparticles composite (OP-Pd/Fe) was prepared by stepwise reduction method. The removal capacity of 4,4′-dibrominated diphenyl ether (BDE15) by OP-Pd/Fe was compared with other various materials. For better understanding the possible mechanism, the synthesized and reacted OP-Pd/Fe materials were characterized by TEM, SEM, XRD, and XPS, respectively. The effects of major influencing parameters on the degradation of BDE15 were also studied. Benefit from the synergistic effect of the carrier and bimetallic nanoparticles, BDE15 could be completely debrominated into diphenyl ether (DE) under suitable conditions. A two-stage adsorption/debromination removal mechanism was proposed. The degradation of BDE15 with OP-Pd/Fe was mainly stepwise debromination reaction, and hydrogen transfer mode was assumed as the dominated debromination mechanism. The removal process fitted well to the pseudo first-order kinetic equation. The observed rate constants increased with increasing Pd loading and OP-Pd/Fe dosage while decreased with increasing initial BDE15 concentration, the tetrahydrofuran/water ratio, and the initial pH of the solution. The work provides a new approach for the treatment of PBDEs pollution.
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PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Sheng Wang,Yan Wang,Yin Liu,Tianshu Zhang,Ling Bing Kong
It is an effective strategy to use clay minerals (palygorskite) to prevent the aggregation of molybdenum disulfide (MoS 2 ) nanosheets prepared with hydrothermal process. The palygorskite/molybdenum disulfide (Pal/MoS 2 ) nanocomposites presented notable microwave absorption performances, which can be optimized by adjusting the content of Pal. The sample with optimized composition has a minimum reflection loss (RL) of -59.91 dB at 9.92 GHz at a thin thickness of 2.28 mm, owing to the enhanced interface polarization and improved impedance matching . It is believed that the 2D hierarchically structured Pal/MoS 2 nanocomposites can serve as a potential microwave absorber for practical applications.
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高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Ping Chen,Hui Zhong,Xiao-rong Li,Meisheng Li,Shouyong Zhou
Nanomaterials with intrinsic enzyme-like activities have attracted extensive research interest as promising alternatives to natural biological enzymes due to their advantages of low cost and high stability. Many artificial enzyme mimics have been successfully applied in the fields of sensing, environmental treatment, and oncotherapy. Herein, novel [email protected] 3 O 4 nanocomposites ( [email protected] 3 O 4 NCs) were fabricated by modifying Pal with Co 3 O 4 nanoparticles through a facile hydrothermal method . The obtained [email protected] 3 O 4 nanocomposites as nanozymes displayed enhanced peroxidase-like activity, which can catalyze the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) to obtain colored products. Kinetic assay indicated that the [email protected] 3 O 4 peroxidase mimics showed a higher affinity towards TMB than that of natural horseradish peroxidase (HRP). Moreover, a sensitive and selective sensor for colorimetric determination of H 2 O 2 and ascorbic acid (AA) was successfully constructed by using [email protected] 3 O 4 nanocomposites as peroxidase mimics. Furthermore, the proposed assay for sensing of AA in model samples was evaluated with satisfactory results, demonstrating the potential applications in complex biological systems.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 5
·2765-2774
·
IF 3.591
Sheng Wang,Wei Lian,Hengdong Ren,Jialin Ma,Yin Liu,Tianshu Zhang,Ling Bing Kong
It is a bold and highly novel attempt to disperse a conductive polymer with clay to enhance its microwave absorption performance. In this paper, we demonstrate that the introduction of palygorskite can effectively prevent polyaniline from aggregation and guide polyaniline on the nanorods of palygorskite. Interestingly, the obtained palygorskite/polyaniline (PAL/PANI) composites exhibit a cross-linked shell structure and the thickness of the polymer shell can be adjusted by controlling the content of palygorskite, which has a positive effect on the microwave absorption performance of the materials, due to improved impedance matching and increased attenuation constant. The optimized sample shows a reflection loss (RL) value of −57.40 dB at 11.04 GHz, at a thickness of 2.41 mm. Meanwhile, the effective absorption bandwidth reaches 5.20 GHz in the range of 11.84–17.04 GHz. It is believed that this achievement can be used as a reference for the design of composite materials as low-cost high-performance microwave absorbers.
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高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Yong Hong Wang,Weike Zhao,Qiuhua Zhang,Junwu Liu,Panyan Zhu,Lei Yao,Gan Chen,Pingli Liu
Polyethylene (PE) - base nanocomposites composed of high density polyethylene (HDPE) as matrix and coating-modified palygorskite clay (MAT) as functional filler and fire resistance was prepared by melt blending method. The MAT powder was prepared by solution heterogeneous precipitation method combined with spray drying processes. The microstructure observation shows that the particle size of the obtained MAT powder was concentrated and even. Both mechanical properties and thermal behaviors of the nanocomposites containing MAT were compared to those with commercial ceramic fillers (naming as S type flame retardants) at the same addition mass ratios level. The added MAT mass fractions in the composite were defined as 5 wt%, 10 wt%, 15 wt%, and 20 wt%, respectively. When the addition amount of MAT is 15 wt%, the impact toughness of MAT/HDPE composites approaches 13.41 kJ/m 2 , which is better than that with commercial fillers. The added fractions of MAT increases to 19.1 wt%, and the elongation at break of nanocomposite reaches 495%, which is much higher than that with S type flame retardants . The differential scanning calorimeter (DSC) test results show that MAT can enhance the melting point range of HDPE and improve the thermal stability of the composite. The LOI (limiting oxygen index) results confirm that MAT can effectively improve the flame retardancy of HDPE composites, and the LOI value increases with the MAT addition. The enhancement of mechanical and thermal properties of the PE-base composite is essentially originated from the uniform dispersion of MAT in polymer matrix and the strong interactions with inorganic – organic interface compatibility.
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CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Chen-Xiang Wang,Ning Wang,Xue-Fen Zhang
The present work investigates the wettability of dodecyltrimethoxysilane (DTMS) functionalized palygorskite (PAL) using both experimental and molecular dynamics approaches. The best superhydrophobicity was achieved at a PAL/DTMS ratio of 0.60 g/mL. Changes in wettability were simulated by varying the DTMS grafting ratio from perspectives of contact angle, interaction energy, the water molecule’s distribution characteristics, and hydrogen bonds. The results show that DTMS grafting promotes hydrophobicity, whereas excess grafting ratio declines hydrophobicity due to roughness decrease. The hot water resistance was analyzed from interaction energy, diffusion behavior, and cohesion energy, and the findings are consistent with the experimental results.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Mingyi Lu,Kang Qin,Fengyuan Zhang,Fan Qin,Quan Feng,Rongbo Guo
Improving the composting efficiency of lignocellulose wastes has been the focus in the field of aerobic fermentation. In this study, FeS 2 was modified on the surface of palygorskite to regulate the straw composting. Material characterizations showed that FeS 2 /Pal composite exhibited glutathione oxidase and catalase activities, attributing to the fact that nano FeS 2 filled the aggregation space of the original palygorskite, exposing more active sulfur vacancy defects. During the composting process, the addition of FeS 2 /Pal could adjust pH value and increase electrical conductivity, which was conducive to improving the efficiency of biological redox process. The total degradation ratio of cellulose was 52.54% with FeS 2 /Pal added. The repolymerization of small molecule intermediates was strengthened, and the final polymerization degree and maturity of composting products was improved. Since the sequence abundance of aromatic amino acids biosynthesis and carbon fixation pathways was higher revealed by PICRUSt . High-throughput sequencing results showed that bacterial community was more dominant than fungi, with community richness index increased by 2.3–3.7 times. The pathogenic bacteria such as Atopostipes and Corynebacterium were disappeared, and heat-resistant bacteria were dominant. The key bacteria and fungi in the group added with FeS 2 /Pal were Limnochordaceae and Melanocarpus genus, which were related to the cellulose enzymatic hydrolysis and humification degree.
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