JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 28
·
IF 1.768
Hang Xu,Haicun Yang,Liu Zhang,Qingting Ni,Fanghong Gong
The Core-shell hybrid particles with attapulgite (ATP) as the core and polymethylmethacrylate (PMMA) as the shell (ATP- g -PMMA) were prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization method. The diameter of ATP- g -PMMA was increased to 50–60 nm, and the surface hygroscopicity was decreased observably after surface grafting. Then, ATP- g -PMMA hybrid particles were filled into the polycarbonate (PC) by melt mixing to afford nanocomposites, and the mechanical properties, microstructures, thermal stability, and rheological behavior of nanocomposites were investigated by varying ATP- g -PMMA concentration in the range 1, 3, 5, and 7 wt % in PC. Fourier Transform infrared spectroscopy (FTIR) suggested that there is no esterification reaction between particles and matrix. Slight changes in tensile strength, and noticeable decrease of elongation and impact strength were observed with the increase in ATP- g -PMMA particles loading. The morphology evaluated by field-emission scanning electron microscopy (FESEM) indicated that ATP- g -PMMA was dispersed with a diameter range of 80–100 nm, and phase separation was appeared with increasing ATP- g -PMMA loadings. Thermogravimetric analysis (TGA) results revealed the thermal stability of composites was strengthened. The disentanglement and interface slip induced by preferred orientation and directional arrangement of ATP- g -PMMA resulted in lower complex viscosity (η*) and higher loss factor (tan δ) compared with the pristine PC. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42262.
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CHEMICAL ENGINEERING JOURNAL
·
2011
·
IF 3.074
Jianming Pan,Longcheng Xu,Jiangdong Dai,Xiuxiu Li,Hui Hang,Pengwei Huo,Chunxiang Li,Yongsheng Yan
Via encapsulation of attapulgite/Fe 3 O 4 magnetic particles (ATP/Fe 3 O 4 ), the magnetic molecularly imprinted polymers (MMIPs) were synthesized for the selective recognition of 2,4-dichlorophenol (2,4-DCP). MMIPs were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) analysis, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), nitrogen adsorption–desorption analysis and Raman spectroscopy. MMIPs were demonstrated claviform shape with an imprinted polymer film (thickness of about 16 nm), and exhibited magnetic property ( M s = 5.67 emu g −1 ) and thermal stability. Batch mode adsorption studies were carried out to investigate the specific binding capacity, binding kinetics and recognition specificity. The Langmuir isotherm model was fitted to the equilibrium data better than the other models, and the monolayer adsorption capacity of MMIPs were 145.79 mg g −1 at 298 K. The kinetic properties of MMIPs were well described by the pseudo-second-order equation, initial adsorption rate and half-adsorption time. The selective recognition experiments demonstrated high affinity and selectivity towards 2,4-DCP over structurally related phenolic compounds. In addition, MMIPs could be regenerated, and their adsorption capacity in the fifth use was about 7.53% loss in 2,4-DCP solution. The MMIPs as-prepared were successfully applied to the separation of 2,4-DCP from environmental water samples.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2020
·
IF 6.444
Jundong Zhu,Fuxing Zhao,Renjie Xiong,Tangping Peng,Yinyi Ma,Jiang Hu,Le Xie,Chongwen Jiang
The advanced thermal management material with high mechanical strength and low thermal conductivity have an extremely important position in thermal insulation. Herein, we successfully prepared a green sustainable and low-cost composite aerogel with attapulgite and gelatin as the main components, and then obtained by chemical crosslinking and freeze-drying. Dopamine was used to functionalize attapulgite to increase interface compatibility between inorganic phase and gelatin molecules. The results show that the as-prepared attapulgite/gelatin composite aerogel have lower bulk density (ρ = 0.036–0.062 g cm −3 ), compression modulus up to 3.92 MPa, lower thermal insulation (λ = 34.28–35.29 mW/m K) and an excellent fire resistance (total heat release rate (THR) to 5.4 J kg −1 ), which mainly attributed to the improvement of the physical properties of the composite aerogel and the construction of the micro/nano structure by the attapulgite with high aspect ratio and high specific surface area embedded in the gelatin skeleton.
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JOURNAL OF CONTAMINANT HYDROLOGY
·
2025
·
IF 4.4
Lulu Ding,Ming Wu,Hui Li,Yanru Hao,Qusheng Li,Cehui Mo
Nanoplastics have raised significant concerns due to their potential ecological risks and contamination of soil-groundwater environments. Previous studies have investigated the effects of clay minerals on nanoplastics migration, but focused on single minerals and pure quartz sand media, without involving the unique layer-chain structure of attapulgite (ATP) and the differential impacts of humic acid (HA) and oxalic acid (OA) on migration behavior. This study investigates the migration mechanisms of carboxyl-modified polystyrene nanoplastics (CPSNPs) in saturated porous media containing a representative natural mineral- ATP. A combination of characterization techniques, Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction theory, one-dimensional column transport experiments and numerical transport model was employed. The effects of environmental factors (ATP content, flow velocity, pH, electrolytes, and organic acid) on CPSNPs migration were systematically investigated. Results suggest that ATP, with its rough surface, abundant pores, and high specific surface area, significantly enhances CPSNPs retention through adsorption and “blocking effect”. As ATP content increased from 1 % to 9 %, the mass recovery rate of CPSNPs decreased from 85.39 % to 55.97 %. Fourier-transform infrared spectroscopy (FTIR) indicated that CPSNPs adsorbed onto ATP without significant chemical structural changes, primarily through physical adsorption. Additionally, HA and OA were found to influence CPSNPs migration differently, with HA enhancing and OA inhibiting CPSNPs movement. Divalent cations (Ca 2+ ) strongly hinder CPSNPs migration compared to monovalent cations (Na + ), due to stronger charge neutralization and aggregation effects. The findings can provide essential insights into CPSNPs transport and retention in natural porous media.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 11
·10342-10351
·
IF 2.195
Lan Ye,Chen Dajun
In this work, attapulgite-based anode materials with different polyacrylonitrile contents were fabricated. The effect of polyacrylonitrile contents on electrochemical performances of the anode materials was systematically investigated. The optimal attapulgite/polyacrylonitrile ratio for the anode material was selected via comparing with electrochemical specific capacity at the same current density. It was shown that the specific capacity of the sample with 20 wt% polyacrylonitrile could reach a maximum value of 446.5 mAh g −1 at the same current density. Furthermore, the effect of carbonization temperatures on electrochemical properties of the anode materials with 20 wt% polyacrylonitrile was investigated. The structural features of the carbonized samples were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller, field emission scanning electron microscopy, transmission electron microscopy, energy dispersive spectrometer and X-ray photoelectron spectroscopy. The discharge specific capacity of the anode material carbonized at 800 °C reached the maximum value of 446.5 mAh g −1 at a current density of 0.1 A g −1 at the 50th cycle. The coulombic efficiency of the AT-based anode material carbonized at 800 °C was 99.8% at the current density of 0.5 A g −1 at the 300th cycle. The anode material carbonized at 800 °C with a mass loading of 0.85 mg cm −2 had excellent electrochemical conductivity and rate capability.
研究领域:
材料科学
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电化学
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储能技术
·
纳米材料
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Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Erman Su,Abdukeyum Abdurexit,Ruxangul Jamal,Tursun Abdiryim,Ahmat Ali,Yanqiang Zhou,Lei Wang,Baotong Chen,Zhiwei Li
Brittleness and low fracture toughness severely limit the performance of rigid polyvinyl chloride (PVC) composites in extreme environments. To address this, we developed a modified filler (mATP@PMMA) by first modifying attapulgite (ATP) with a titanate coupling agent (TCA), which then served as a molecular bridge to graft polymethyl methacrylate (PMMA) onto the ATP surface via emulsion polymerization. This design promotes uniform dispersion and strong interfacial adhesion, effectively dissipating energy and thereby enhancing mechanical properties. Experimental results show that adding only 3 phr of mATP@PMMA significantly improves the processability, thermal stability, and dynamic mechanical performance of the PVC composite. At room temperature, tensile strength, flexural strength, and impact strength increase by 26.8%, 32.5%, and 23.1%, respectively. Even at −20 °C, the composite maintained high strength and exhibited considerable resilience, with SEM fractography clearly revealing effective interfacial interactions. While the impact strength of PVC drops by 48.4% at low temperature, the composite with PVC/mATP@PMMA shows only a 14.8% reduction. As a highly efficient performance additive, mATP@PMMA demonstrates considerable potential for manufacturing high performance composites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Zongtang Liu,Haini Yang,Mian Wang,Yufeng Sun,Zhenghao Fei,Shujuan Chen,Rui Luo,Lin Hu,Chenggang Gu
Effective removal of polybrominated diphenyl ethers (PBDEs) from the environment is essential for the ecosystem and human health. Reductive debromination of PBDEs by nanoscale zerovalent iron (nZVI) has become an important technology. However, the agglomeration and low persistence catalytic activity of nZVI particles have become urgent problems to be improved. Herein, we report the first application of a new organo-attapulgite (OA) supported Fe/Pd nanoparticles (OA-Fe/Pd) composite for decabromodiphenyl ether (BDE209) removal. BDE209 was efficiently removed using OA-Fe/Pd with a reaction rate that was 9.97 times greater than that of the nZVI due to the synergetic effect of support material OA and Pd loading. OA could prevent nZVI particles from agglomeration and adsorb BDE209 molecules to its surface. Pd could supply atomic hydrogen and also prevent the oxidation of nZVI particles. The degradation of BDE209 by OA-Fe/Pd was affected by many factors and followed pseudo first-order kinetics. The degradation of BDE209 by OA-Fe/Pd underwent a stepwise debromination manner with the H-transfer dominant mechanism. BDE209 (25 mg∙L -1 ) could be degraded to penta-BDEs to diphenyl ether (DE) by 3.0 g∙L -1 OA-Fe/Pd within 240 min under neutral condition. This study provides some inspiration for improving the removal efficiency of PBDEs with nZVI-based materials.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yingshan Zeng,Qiao Yin,Zhi Liu,Hao Dong
The rational utilization of graphitic carbon nitride (g-C 3 N 4 ) and quantum dots (QDs) semiconductors to highlight their merits as efficient photocatalysts remains attractive and challenging. Targeted integration of g-C 3 N 4 and QDs with expanded interfacial contact and multi-channel electron transfer is an effective means to boost the transfer efficiency of photogenerated electrons and achieve prominent photocatalytic activity. In this article, novel attapulgite (ATP)-interpenetrated Bi 2 WO 6 QDs/g-C 3 N 4 nanocomposites (BWQ/g-C 3 N 4 /ATP, designated as BCAs) are successfully fabricated through a simple and effective in situ hydrothermal growth method. The nanorod-structured ATP acts as numerous bridges to intercalate into the interlayers and expands inner space of g-C 3 N 4 . Theoretical calculation results indicate that an interfacial internal electric field (IEF) is formed where electrons transfer from g-C 3 N 4 to Bi 2 WO 6 . Originating from the intact interfacial contact of the expanded g-C 3 N 4 and highly dispersed BWQ with reinforcing electronic transferability of ATP, the optimal sample of BCA5 with higher specific surface area, more active sites and electron transfer channels, and stronger light harvestability, exhibits a nearly-100% degradation of organic contaminant of 2-Mercaptobenzothiazole in water, 35-, 17- and 3-fold rate constant higher than that the pristine g-C 3 N 4 , BWQ and Bi 2 WO 6 /g-C 3 N 4 counterparts, respectively. Various characterization techniques are employed to put forward the mechanisms in depth on MBT degradation route and IEF-induced photocatalytic Z-scheme over the BCA5 under photoexcitation.
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RENEWABLE ENERGY
·
2020
·
IF 6.274
Ting Zhang,Tuodi Zhang,Jing Zhang,Deyi Zhang,Pengran Guo,Hongxia Li,Chunlei Li,Yi Wang
The large-scale commercial application of phase change materials (PCMs) was seriously limited by the leakage, poor heat storage capacity and slow thermal response behavior. To address these issues, stearic acid/graphene oxide-attapulgite aerogel (SA/HGA-ATP) shape-stabilized PCMs were fabricated via hydrothermal method . The morphology, structural characteristics, thermal properties were determined and the effects of ATP percentage on the thermal properties of confined SA were studied synchronously. The nanofibers of ATP intercalated among GO sheets via grafting modification and formed fiber-bridging 3D-network. Due to the enhanced loading interspaces and suppressed volumetric shrinkage of hybrid matrix, SA/HGA-ATP exhibited excellent thermal energy storage capacity (190.9 J g −1 ) and ultra-high SA contents (approx. 98 wt%) without leakage. The intercalated nanofibers sheltered the oxygen-containing groups of matrices, leading to the promotion of thermal energy storage performance with increase of ATP contents. Besides, the as-prepared PCMs displayed outstanding thermal response behavior because the interconnected and fiber-bridged matrices provided continuous thermal transfer pathway. Due to the protection of matrix, the composite PCMs also exhibited superior structure stability and incomparable thermal energy storage/release reliability. Considering the outstanding thermal-physical properties and low-cost of ATP, the SA/HGA-ATP has the potential to be applied in the fields of thermal energy storage, conversion and utilization.
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Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 13
·6998-7005
·
IF 7.443
Lei Lu,Xing-Yang Li,Xiao-Qin Liu,Zhi-Min Wang,Lin-Bing Sun
Metal–organic frameworks (MOFs) have attracted extensive attention due to their large surface area, diverse structures, and tuneable functionality. However, the poor hydrostability of most reported MOFs hinders their practical applications severely. In this paper, we report a strategy to modulate the properties of a typical MOF, namely MOF-5 [Zn4O(BDC)3; BDC = 1,4-benzenedicarboxylate] by hybridizing it with a natural clay (i.e. attapulgite), for the first time. A new kind of hybrid material resulting from the hybridization of the MOF and attapulgite was thus constructed. Our results showed that the hydrostability of the MOF was apparently improved due to the hybridization with attapulgite. The frameworks of MOF-5 were degraded seriously under the humid atmosphere, while the structure of the hybrid materials could be well preserved. We also demonstrated that the hybrid materials were highly active in the heterogeneous Friedel–Crafts alkylation reaction of benzyl bromide with toluene. The conversion of benzyl bromide reached ∼100% under the reaction conditions investigated. More importantly, the catalytic stability of the hybrid materials was significantly enhanced owing to the introduction of attapulgite. The activity could be well recovered with no detectable loss, and the conversion remained at ∼100% at the sixth run, which was apparently higher than that of MOF-5 (27.7% at the sixth run). The excellent hydrostability, catalytic activity, and reusability make the present materials highly promising for utilization as heterogeneous catalysts in practical applications.
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CHEMOSPHERE
·
2024
·
IF 8.1
Zhenzhong Hu,Xuejing Tang,Xiaojia Ma,Sheng-qi Guo,Mengmeng Zhen,Jingxia Ning,Sheng Xu,Boxiong Shen
Ferromanganese spinel oxides (MnFe 2 O 4 , MFO) have been proven effective in activating persulfate for pollutants removal. However, their inherent high surface energy often leads to agglomeration, diminishing active sites and consequently restricting catalytic performance. In this study, using Al-MCM-41 (MCM) mesoporous molecular sieves derived from natural attapulgite as a support, the MFO/MCM composite was synthesized through dispersing MnFe 2 O 4 nanoparticles on MCM carrier by a simple hydrothermal method, which can effectively activate persulfate (PS) to degrade Tetracycline (TC). The addition of Al-MCM-41 can effectively improve the specific surface area and adsorption performance of MnFe 2 O 4 , but also reduce the leaching amount of metal ions. The MFO/MCM composite exhibited superior catalytic reactivity towards PS and 84.3% removal efficiency and 64.7% mineralization efficiency of TC (20 mg/L) was achieved in 90 min under optimized conditions of 0.05 mg/L catalyst dosage, 5 mM PS concentration, room temperature and no adjustment of initial pH. The effects of various stoichiometric MFO/MCM ratio, catalyst dosage, PS concentration, initial pH value and co-existing ions on the catalytic performance were investigated in detail. Moreover, the possible reaction mechanism in MFO-MCM/PS system was proposed based on the results of quenching tests, electron paramagnetic resonance (EPR) and XPS analyses. Finally, major degradation intermediates of TC were detected by liquid chromatography mass spectrometry technologies (LC-MS) and four possible degradation pathways were proposed. This study enhances the design approach for developing highly efficient, environmentally friendly and low-cost catalysts for the advanced treatment process of antibiotic wastewater.
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Catalysts
·
2025
·Vol. 15
·期 8
·732
·
IF 4
Jian Shi,Yao Xiao,Menghan Yu,Xiazhang Li
Accelerated industrialization and surging energy demands have led to continuously rising atmospheric CO2concentrations. Developing sustainable methods to reduce atmospheric CO2levels is crucial for achieving carbon neutrality. Concurrently, the rapid development of new energy vehicles has driven a significant increase in demand for lithium-ion batteries (LIBs), which are now approaching an end-of-life peak. Efficient recycling of valuable metals from spent LIBs represents a critical challenge. This study employs conventional hydrometallurgical processing to recover valuable metals from spent LIBs. Subsequently, Ni-doped Co3O4(Ni:Co3O4) supported on the natural mineral attapulgite (ATP) was synthesized via a sol–gel method. The incorporation of a small amount of Ni into the Co3O4lattice generates oxygen vacancies, inducing a localized surface plasmon resonance (LSPR) effect, which significantly enhances charge carrier transport and separation efficiency. During the photocatalytic reduction of CO2, the primary product CO generated by the Ni:Co3O4/ATP composite achieved a high production rate of 30.1 μmol·g−1·h−1. Furthermore, the composite maintains robust catalytic activity even after five consecutive reaction cycles.
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