MICROPOROUS AND MESOPOROUS MATERIALS
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2016
·
IF 3.349
Wenbo Wang,Guangyan Tian,Li Zong,Qin Wang,Yanmin Zhou,Aiqin Wang
A hierarchical mesoporous hybrid Zn-silicate adsorbent with superior adsorption performance for aureomycin (AMC) and tetracycline (TC) has been successfully synthesized by employing an “all-into-one” strategy and one-pot hydrothermal reaction , using naturally abundant, low-cost red palygorskite clay (RPAL), sodium silicate and zinc salts as raw materials. The morphologies and crystal forms of the Zn-silicates can be tuned by altering the dosage of Zn 2+ ions. Low-crystalline sheet-like Zn-silicates were formed at the Si/Zn ratio of 3:1 and 2:1, and zinc orthosilicates were obtained at the Si/Zn ratio of 1:1 and 1:2. A systematic study on their adsorption abilities for the antibiotics AMC and TC indicates that the sheet-like Zn-silicate has higher adsorption capacity for AMC and TC than zinc orthosilicate, and the Zn-silicate with Si/Zn ratio of 3:1 has the best adsorption capacity of 384 mg/g for AMC and 337 mg/g for TC, which is obviously higher than that of RPAL (154 mg/g for AMC and 140 mg/g for TC). The adsorption properties are dependent on the pore size and surface charges, instead of specific surface area. The average pore sizes of 10.62–11.50 nm and the negative surface charge (−42.54 mV) resulting from the –Si(M)O − groups are beneficial to the adsorption for both AMC and TC. The adsorption process mainly involves with monolayer coverage, and chemo-adsorption plays a key role for the enhanced adsorption capacity. The results suggest that the Zn-silicates derived from natural abundant clay mineral have superior performance, and could be candidates to remove AMC and TC from the wastewater with high amounts of AMC and TC.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2013
·Vol. 38
·期 2
·777-783
·
IF 2.966
Aijuan Xie,Liang Ji,Shiping Luo,Zhiliang Wang,Yiyang Xu,Yong Kong
A nanocomposite of poly(m-phenylenediamine)/palygorskite (PmPD–PG) is facilely synthesized via in situ oxidative polymerization of m-phenylenediamine (mPD) on palygorskite (PG) and its reactive adsorbability to Cr(VI) is examined. PG in the nanocomposite plays important roles in the improvement of adsorptivity of Cr(VI). The pH value of the solution is increased after adsorption, which is quite different from Pb(II) adsorption with aromatic diamine polymers. This unusual removal behavior of Cr(VI) with PmPD–PG is due to the redox reaction between Cr(VI) and amino/imino groups on the PmPD chains.
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APPLIED CLAY SCIENCE
·
2024
·
IF 5.3
Fengya Ran,Meng He,Shiyong Sun,Rui Lv,Sen Lin,Ke Wang,Yevgeny Aleksandrovich Golubev,Olga Borisovna Kotova,Elena Leonidovna Kotova
Zeolite products synthesized from mineral materials are receiving widespread attention, while there are few reports on the introduction of heteroatom metals from minerals into zeolites. Herein, the effects of different silicon sources, hydrothermal reaction time and the amount of template on the crystallisation of Fe-ZSM-5 were investigated. The morphology and structure of ZSM-5 were characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), X-ray electron spectroscopy (XPS) and scanning electron microscopy (SEM). The catalysis of 3,3′,5,5′-tetramethylbenzidine (TMB) by Fe-ZSM-5 was then carried out to evaluate its enzyme-like catalytic performance as a type of nanozyme catalyst. The results showed that Fe-ZSM-5 exhibited peroxidase-like activity, oxidizing TMB into a colored substance in the presence of hydrogen peroxide (H 2 O 2 ). Kinetic analysis implied that, compared with natural horseradish peroxidase (HRP), Fe-ZSM-5 peroxidase mimics exhibit inferior affinity and enzymatic catalytic velocity towards the TMB substrate. However, it exhibited excellent stability under extreme pH, temperature, and ionic strength conditions. This work provides a possible reference for the construction of functional nanozymes using natural mineral resources.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Guofeng Rui,Huilin Fan,Xiangmin Tang,Zian Zhao,Lei Tan,Xiaotong Wu,Yujie Song,Faiza Meharban,Kailong Zhang,Yuanyuan Cui,Chao Lin,Xiaopeng Li
The development of solid-state electrolytes with high ionic conductivity and wide electrochemical window is crucial for the advancement of lithium batteries. In this work, we introduce a polyethylene oxide (PEO)-based electrolyte hybridized with the polyacrylonitrile coated lithiated palygorskite fibers (Li-Pal@PAN) to enhance ionic conductivity and electrochemical stability. First, the Li-Pal@PAN serves as a one-dimensional lithium-ion conduction pathway in the solid-state electrolyte with a low interfacial energy barrier for Li + transfer. Then, it facilitates the formation of a composite solid electrolyte interface (SEI) that contains Li 3 N, effectively mitigating side reactions between the lithium metal anode and the electrolyte. As a result, the Li-Pal@PAN enhances the oxidative stability of the PEO-based electrolyte, increasing its oxidation potential to 4.9 V. Electrochemical characterization further demonstrates that a Li||Li symmetric cell using the PEO/Li-Pal@PAN composite exhibits stable cycling performance over 1000 h at a current density of 0.1 mA cm −2 . Moreover, all-solid-state lithium metal batteries utilizing a high-voltage ternary cathode (LiNi 0.6 Mn 0.2 Co 0.2 O 2 , NCM622) deliver a high-rate capacity of 117 mAh g −1 at 0.3C. These results underscore the significant potential of PEO/Li-Pal@PAN composites in improving the performance, stability, and longevity of all-solid-state Li metal batteries, offering a promising pathway for their application in advanced energy storage system.
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高影响因子
APPLIED CLAY SCIENCE
·
2016
·
IF 2.586
Wenbo Wang,Guangyan Tian,Zhifang Zhang,Aiqin Wang
A new eco-friendly hybrid Mg, Al-silicate adsorbent with superior adsorption properties for Cu(II) was prepared by a one-step hydrothermal process using earth-abundant low-grade palygorskite (PAL) as the starting materials and non-toxic sodium carbonate as the assistant. The structural characterizations by scanning electronic microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), BET adsorption-desorption isotherms and Zeta potential analyses confirm that part of rod-like PAL crystals were in-situ transformed as smectite sheets, and the hybrid silicate adsorbents with rod/sheet transition formulation were formed. Under the action of alkaline, some inert Si O Si(or M) bonds were broken as –Si–O − groups, which not only make the adsorbent having extremely negative surface charge (− 46.4 mV), but also strengthen the chelating and holding capability of the adsorbent to Cu(II). The silicate adsorbent shows high adsorption capacity of 229.9 mg/g for Cu(II), which can capture 98.95% of Cu(II) from 200 mg/L of Cu(II) solution at the dosage of 2.6 g/L (only 64.5% for raw PAL). The intensified electrostatic attraction , ion-exchange, and chemical association of Si-O − surface groups with Cu(II) primarily contribute to the improved capture capability for Cu(II).
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SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Chen-Xiang Wang,Ning Wang,Kai-Yi Jiang,Wen-Ju Ji,Yong-Jiang Liu,Feng Tian,Xue-Fen Zhang
Biomimetic superhydrophobic surfaces have become an increasingly hot topic in the area of aluminum alloy protection. However, it remains a significant challenge to construct superhydrophobic coatings with reliable durability and multifunction through simple and economical strategies. In this study, we designed a novel superhydrophobic coating with a water contact angle of ∼165.0° and a sliding angle of ∼2.4° on Al alloys by spraying hydrophobically modified natural palygorskite (SH-PAL) on the pre-cured epoxy resin (EP). The resulting superhydrophobic coating (EP@SH-PAL) exhibits good mechanical resistance, UV resistance, hot water repellency , chemical stability, thermal stability, and self-healing capabilities against plasma etching . Corrosion tests reveal that the protection efficiency of the EP@SH-PAL sample is up to 99.98 %, which remains at a high value of 90.30 % even after 20 days of immersion in 3.5 wt% NaCl. This improved corrosion resistance is attributed to the synergistic physical shielding from the SH-PAL topcoat and the EP primer. Meanwhile, molecular dynamics simulations of the mechanical durability and corrosion resistance of the EP@SH-PAL coating were performed to support the experimental results at the microscopic level. In addition, the above-prepared superhydrophobic coating also demonstrates excellent self-cleaning and antifouling characteristics. This research will provide a new method for fabricating low-cost, multifunctional, superhydrophobic anticorrosion coatings on aluminum alloys and other metal substrates.
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Minerals
·
2025
·Vol. 15
·期 3
·251
·
IF 2.2
Jiajun Zhang,Guanzheng Zhuang,Jinrong Chen,Wenxiao Fan,Jixing Fan,Zhuhua Kuang,Dong Liu
This study systematically investigates the colloidal stability, rheological properties, and filtration behavior of palygorskite–montmorillonite mixed clays in both freshwater and seawater systems. By varying the mass content and dispersion medium (freshwater/seawater), we analyze the colloidal stability, zeta potential, flow curves, viscosity, shear-thinning behavior, thixotropy, and fluid loss of the dispersions. The results show that palygorskite exhibits good rheological performance in both freshwater and seawater, while montmorillonite performs better in freshwater but suffers a significant decline in seawater. However, palygorskite demonstrates high fluid loss, which is unfavorable for drilling fluid function. Mixed clays can mitigate the limitations of individual clays to some extent, but the specific performance depends on the clay mineral content and dispersion medium. In freshwater, a small amount of montmorillonite improves the viscosity and shear-thinning behavior of the dispersion, with optimal montmorillonite contents of 22% and 38%, respectively. The thixotropy and fluid loss reduction in the mixed clays are positively correlated with montmorillonite content. In seawater, the rheological performance inversely correlates with Mt content due to montmorillonite’s high sensitivity to electrolytes. The addition of Pal enhances the colloidal stability and rheological properties of the mixed clays in seawater. This work provides theoretical insights into the behavior of mixed clays in different media, offering valuable guidance for the design of seawater-based drilling fluids.
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高影响因子
DESALINATION
·
2021
·
IF 9.501
Jiahui Zhang,Nan Li,Dong Wang,Jinmei Li,Yue Chen,Zhining Wang
A novel omniphobic-hydrophilic Janus membrane was developed to tackle the problems of traditional hydrophobic membrane wetting and fouling during membrane distillation (MD). The asymmetric membrane was first fabricated by simply depositing dopamine (DA) on a commercial polytetrafluoroethylene/polyethylene terephthalate (PTFE/PET) membrane. The low-surface-energy omniphobic surface with multilevel re-entrant structures was developed via spraying cylindrical palygorskite (PAL) nanorods , which were modified by polydopamine (PDA) coatings and fluorinated by 1 H , 1 H , 2 H , 2 H -perfluorodecyltriethoxysilane (17FAS). The asymmetric Janus membrane possessed outstanding wettability : the top layer achieved omniphobic (163.9°) while the bottom layer displayed underwater superoleophobicity (157.2°). In direct contact membrane distillation (DCMD) operations, the Janus membrane exhibited a robust desalination performance (salt rejection of ~100%) and excellent stability (over 50 h) while treating different types of surfactant-stabilized mineral oil-in-water emulsions, demonstrating the superior wetting and fouling resistance of the membrane. Overall, the results exemplified an effective strategy for engineering Janus membranes with an omniphobic PAL and a hydrophilic PDA layer. Importantly, the Janus membrane shows broad application prospects in the field of MD processes for water recovery from industrial wastewater containing complex compounds.
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高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2011
·
IF 0.559
Xue Wang,Jianming Pan,Wei Guan,Xiaohua Zou,Wei Hu,Yongsheng Yan,Chunxiang Li
Raw palygorskite was modified by the addition of selected surfactants, viz. hexadecyltrimethylammonium bromide (CTAB), cetylpyridinium bromide (CPB) and octadecyldimethylbenzyl ammonium chloride (ODBAC). These modified clays were used as sorbents for the adsorptive removal of 2,6-dichlorophenol (2,6-DCP) from aqueous solution. Characterization of the sorbents was achieved by Fourier-transform infrared (FT-IR) analysis, nitrogen adsorption/desorption measurements and particle-size analysis. The adsorptive performance of the modified palygorskites towards the removal of 2,6-DCP from aqueous solution was studied by batch methods. In addition, the influence of contact time, pH and temperature on the adsorption process was investigated in detail.The equilibrium data for the three modified sorbents were well fitted by the Langmuir model. It was found that the monolayer adsorption capacity increased with increasing contact time and solution temperature, respectively. Application of the pseudo-first-order and pseudo-second-order kinetic models to the kinetic data showed that the pseudo-second-order kinetic model provided an excellent fit (R2 > 0.99). In addition, the film diffusion, pore diffusion and intra-particle diffusion models were also used to investigate the adsorption mechanism. Intra-particle diffusional analysis indicated that 2,6-DCP molecules diffused rapidly during the initial adsorption stage, followed by a slower stage and finally the establishment of an equilibrium condition.Thermodynamic studies showed that the adsorption of 2,6-DCP onto the three sorbents examined occurred spontaneously and that the process was endothermic in nature. The results indicate that the surfactant-modified palygorskite exhibited a significant potential as a sorbent material for the removal of phenolic compounds from aqueous solution.
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 4
·1009-1020
·
IF 4.569
Min Pan,Ning Wang,Zhenting Weng,Xuehua Zou,Xiaoming Huang
A heterogeneous Fenton-like system comprising palygorskite/MnO2/Fe3O4 (PMM) as a superior, low-cost, and eco-friendly ternary catalyst for the activation of peroxymonosulfate (PMS) was investigated with regard to its ability to degrade Acid Scarlet GR in an aqueous solution. Under the optimum catalytic oxidation conditions of 1 g L−1 PMM, 0.7 g L−1 PMS, and an initial pH value of 5, 200 mg L−1 Acid Scarlet GR was completely degraded within 300 min. PMM exhibited outstanding magnetic recovery ability and reusability after nine cycles with a degradation efficiency of up to 95.4%. The PMM catalyst had a broad working pH range. Singlet oxygen 1O2 was considered to play the principal role in the degradation of Acid Scarlet GR in the PMM/PMS system. The synergistic effect between MnO2, Fe3O4, and PG substantially accelerated the catalytic activity of PMM, and MnO2 was identified to be the primary active site. These findings indicate that PMM is a nanocatalyst that can efficiently activate PMS for the treatment of dye-containing wastewater.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Dongdong Li,Hongyuan Zhao,Guoquan Wang,Jörg Rinklebe,Su Shiung Lam,Runqiang Liu,Lianyang Bai
The excessive diquat (DQ) residue poses a serious hazard to the ecological environment and human health. Herein, a simple, low-cost, and scalable ultrasonication-assisted strategy was proposed to fabricate the composite of Super-P carbon black nanoparticles dispersed palygorskite (Pal) nanofiber , which was employed to construct an electrochemical sensor for DQ determination. The Pal/Super-P/GCE sensor exhibited ultrasensitive determination performance with a low detection limit (0.1514 nM) and high sensitivity (44.141 μA μM −1 ) in the linear DQ concentration range of 0.00050–1.0 μM. The recoveries of the constructed sensor ranged from 95.6 % to 100.3 % when applied to detect DQ in river water, potato, and cucumber. The above enhanced DQ detection performance was primarily due to the synergistic effect of Pal and Super-P. Pal with high adsorption ability and excellent biocompatibility could provide numerous attachment sites for DQ adsorption due to the superior ion-exchange property and plentiful Si-OH on its surface. Super-P with pearl-chain like structure contributed to forming an interconnected conductive network, thus facilitating the homogeneous dispersion of Pal and compensated for the poor conductivity of Pal. This study provides a valuable reference in developing clay-based nanocomposite via ultrasonication-assisted strategy to achieve the application of electrochemical sensor at the ultra-trace levels detection of pesticides.
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高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2022
·
IF 6.51
Zhaolun Zhang,Xi Zhang,Zhengpeng Fu,Lihua Cao,Ziyi Xiong,Ying Tang,Yongjun Feng
This paper presents a facile approach to develop palygorskite (Pal), a fibrous clay mineral, as a delivery system of tea tree oil (TTO) for topical acne therapy. The obtained TTO-Pal composite showed an efficient loading of TTO (27.4%) with a selective accumulation of terpine-4-ol and 1,8-cineole (two major antimicrobial TTO constituents), sustained release of TTO at skin physiological conditions (pH5.4, 32 °C) and superior skin sebum (2.2 g/g) absorbability. In vitro toxicological assessments showed that the Pal incorporation strategy significantly reduced the acute contact toxicity of TTO. The antimicrobial results revealed a preferable bacteriostatic effect for the TTO-Pal system towards opportunistic dermal pathogens ( Escherichia coli , Staphylococcus aureus and Propionibacterium acnes ) over the beneficial bacterium ( Staphylococcus epidermis ). Moreover, TTO-Pal based formulations exhibited pronounced clinical therapeutic efficacy in treating facial acne by rapidly reducing inflamed lesions, modulating skin sebum overproduction and restoring barrier function. This is the first report of using fibrous clay as a biocompatible nanocarrier system for topical delivery of essential oils in efficient management of facial acne with both in vitro and in vivo evidences, which may open perspectives for fibrous clay-drug delivery system in topical application and expand the high added value development of this mineral resource in the advanced healthcare fields.
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高影响因子
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