APPLIED CLAY SCIENCE
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2026
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IF 5.2
Nan Liu,Xu Zhang,Xuemei Sun,Na Meng,Bingnan Du
Traditional wound dressings lack antibacterial properties and may cause wound damage during dressing changes, impairing healing. Therefore, single-function dressings cannot meet the multifaceted requirements of modern wound healing processes. This study successfully prepared a Cu 2 O/PDA-MMT by loading cuprous oxide nanoparticles (Cu 2 O NPs) onto polydopamine (PDA)-modified montmorillonite (MMT), which was then incorporated with chitosan (CS)/polyvinyl alcohol (PVA) via a one-step blending method to fabricate CS/PVA/Cu 2 O/PDA-MMT hydrogels. Characterization techniques including XRD, FTIR, TG, and SEM confirmed the successful preparation of the material, while systematic evaluation demonstrated its physicochemical properties such as gel fraction, porosity, and mechanical performance. Antimicrobial experiments, cell compatibility tests, mouse tail-amputation hemorrhage models, and full-thickness skin wound infection models demonstrated that the 1% CS/PVA/Cu 2 O/PDA-MMT hydrogel not only exhibited over 95% antimicrobial inhibition rates against both test bacterial strains but also possessed excellent biocompatibility. It significantly reduced blood loss in rat tail hemorrhage models. When treating full-thickness skin wounds, this hydrogel effectively controlled infection, accelerated healing, achieved a wound healing rate exceeding 97% by day 12, and promoted tissue regeneration. These outstanding properties position it as a wound dressing material with significant clinical application potential.
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PLANT CELL AND ENVIRONMENT
·
2025
·
IF 6.3
Xin Wen,Chao He,Yuhao Fu,Leilei Xiang,Jean Damascene Harindintwali,Yu Wang,Siqi Wei,Maoyuan Liao,Jiandong Jiang,Xin Jiang,Ravi Naidu,Fang Wang
Shifting from maize monoculture to maize-soybean rotation or intercropping is a key strategy to boost soybean self-sufficiency. However, the residual atrazine in soils, resulting from the extensive use of atrazine in long-term maize monocultures, poses a significant threat to soybean productivity, requiring immediate solutions. This study introduces a novel seed-coating method using atrazine-degrading Paenarthrobacter sp. AT5 to mitigate the adverse effects of atrazine on soybean growth. The efficacy of seed coating in reducing atrazine accumulation in seedlings and promoting seedling growth was found to vary depending on the growth stage and atrazine concentration in the soil. At low atrazine concentrations (close to safe levels for soybeans), the seed coating reduced leaf atrazine concentrations by 30.7%–46.0% at the cotyledon growth stage (VC). At high atrazine concentrations, the shoot atrazine concentrations decreased by 60.9%–88.4% at the emergence growth stage (VE) and seedling biomass was significantly increased in the VC stage. This is associated with the influence of seed coating on rhizosphere metabolites, which activate the plant defence system and recruit atrazine-degrading and plant-beneficial bacteria. This study offers comprehensive insights into the potential of seed coating with strain AT5 as a scalable solution for mitigating atrazine toxicity in soybeans.
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BIOMASS & BIOENERGY
·
2026
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IF 5.8
Meiling Zhang,Hui Wen,Jianhao Shao,Xupin Zhuang,Zhangang Wang
In this study, banana nanocellulose/montmorillonite aerogel acts as support material and by vacuum impregnation paraffin conducts as latent heat storage material to prepare a shape-stabilized phase change composite. The microstructure, functional groups, and crystallinity of the samples were determined by SEM, FTIR, and XRD. The thermal storage and thermal cycling properties of the samples were measured by DSC, and the thermal conductivity was measured by thermal constant analyzer. The ΔH m /ΔH c values of CMP are 93.9–96.3 % and 91.9–97.4 % of paraffin. There is no obvious leakage of the composite after heated at 80 °C for 1 h. The temperature of the composite can reach 83.5 °C under an intensity of 150 mW/cm 2 simulated sunlight and the heat release time without sunlight can reach 8 h. The composites prepared have excellent shape stability, thermal conductivity, and photothermal conversion efficiency, which can achieve efficient thermal energy storage and long-term thermal energy release. At the same time, this work provides reference value for the resource utilization of banana wasted stem.
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RSC Advances
·
2026
·Vol. 16
·期 14
·12927-12933
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IF 6.1
Pengfei Chen,Junfeng Qian,Qun Chen,Xuan Dai,Mingyang He
The phosgene-free synthesis of methylene diphenyl diisocyanate (MDI) from dimethyl carbonate (DMC) involves the acid-catalyzed condensation of methyl N-phenylcarbamate (MPC) with formaldehyde (HCHO) to produce methylene diphenyl carbamate (MDC). This study investigates the catalytic properties of a commercial acidic clay (HM-X), with a focus on its acidity and Brønsted/Lewis (B/L) balance. Characterization by XRD, N2 adsorption, NH3-TPD, and pyridine-IR shows that HM-X has a high density of medium and strong acid sites, with a notable Brønsted component. Under certain reaction conditions in DMC with co-fed water, HM-X achieved an 88.1% MDC yield at 90 °C after 6 hours. However, excessive acidity promoted side reactions, decreasing MDC selectivity. These findings highlight the importance of optimizing Brønsted and Lewis sites to balance activity and selectivity, providing insights for designing efficient, recyclable solid acids for sustainable, phosgene-free MDI production.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tao Wu,Xuewen Gao,Jiaxing Feng,Yuan Jin,Zhengye Feng
Accurate predictions of the distribution coefficient ( K d ) and effective diffusion coefficient ( D e ) of radionuclides in bentonite barriers is critical for the safety evaluation of high-level radioactive waste repositories. Clay properties have a crucial impact on both parameters. However, existing models do not adequately capture the complex physicochemical characteristics of clay minerals, thereby limiting their prediction accuracy. This study developed, a variational autoencoder-multi-task deep learning (VAE-MTDL) framework to improve the predictive accuracy for K d and D e by integrating radionuclide diffusion data with X-ray fluorescence (XRF), X-ray diffraction (XRD), and cation exchange capacity (CEC) data. The model was trained using a dataset comprising 1159 experimental instances and 49 input features. It achieved high predictive accuracy (R 2 = 0.96 for Kd and 0.93 for D e ). Shapley additive explanations (SHAP) analysis identified total porosity as the most influential predictor, while XRF and XRD data significantly contributed to the predictions. Experimental validation using through-diffusion tests for HCrO 4 − (as a surrogate for monovalent anionic radionuclide species) and metal-EDTA complexes (including Eu(III), Sm(III), Ce(III), and Co(II) as a surrogate for di- and trivalent cationic radionuclide species) in compacted bentonite-sand mixtures confirmed robust generalization, with predicted-to-experimental ratios ranging from 1/5 to 5 for K d , and from 1/3 to 3 for D e . The enhanced accuracies in K d and D e predictions have practical relevance in advancing the safety evaluation of repositories.
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ACS Applied Polymer Materials
·
2023
·
IF 5
Muhua Yuan,Haijun Wang,Tong Wang,Haibo Yang,Chunlei Yuan
The high dielectric constant of PVDF is very important for its high-performance energy storage dielectrics, but it is more critical to strike a proper balance between high dielectric constant and low dielectric loss. In this work, deep eutectic solvent (DES) and montmorillonite (MMT) have been used together to prepare γ-phase PVDF composite films with excellent dielectric properties. It is found that DES significantly induces crystallization of γ-phase and increases the dielectric constant of the composite due to the incremental ion motion. Meanwhile, DES greatly promotes the stripping and dispersion of MMT layers, which in turn inhibits the long-range ion migration and therefore suppresses the dielectric loss of the composite to a very low level. The dielectric constant of PVDF/MMT/DES composite films can increase to 32, while the dielectric loss remains as low as 0.06 at 1 kHz. Moreover, the synergistic effect of MMT/DES also contributes to enhancing the toughness and optical transmittance of composite films.
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ACS Omega
·
2023
·
IF 4.1
Guojun Zhi,Rong Xie,Ruigang Yang,Junqi Cui,Xinyu An,Yulong Zhang
This paper proposes a new montmorillonite-type multiple network composite gel for the prevention of coal spontaneous combustion. The first network is formed by the cross-linking of polyvinyl alcohol (PVA) and boric acid under alkaline conditions. The second network is formed as a result of intermolecular hydrogen-bonding interactions between polyacrylamide (PAM) and polyvinyl alcohol. Montmorillonite (MMT) is designed as the backbone material in the preparation of composite gels. The optimal ratios of the reactants of the composite gel were determined through orthogonal experiments. The experimental results showed that PVA had the greatest influence on the gelation time, whereas the PAM concentration had the strongest influence on the gel permeability. The optimal blending ratio was 4% MMT + 2.5% PVA + 1.5% PAM. The chemical performances of the composite colloids, such as inhibition rate, reactive functional groups, and kinetics, were investigated. Results showed that multiple network composite gels could effectively inhibit the coal spontaneous combustion reaction. Based on the principle of coal spontaneous combustion and the cross-linking network structure of the composite gel, the flame-retardant and fire-extinguishing mechanisms were also explored in terms of both physical and chemical inhibition pathways.
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APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Haojie Zhang,Xiongbo Dong,Huaming Yang
Rapid and efficient remediation of heavy metal-contaminated water and soil bodies has been a hot topic in ecological remediation. However, designing and synthesizing green remediation materials with fast kinetics and high adsorption capacity is still challenging. In this study, a novel heavy metal remediation material (Mt@ZrP) has been prepared using montmorillonite to induce the structural rearrangement of zirconium phosphate (ZrP). The results showed that montmorillonite could mediate the external electron distribution of ZrP , thus increasing its O 1 s binding energy. Distinct from the electrostatic adsorption of bare ZrP, Mt .@ZrP with higher orbital binding energy led to an extra adsorption mode with internal spherical coordination. Such characteristics dramatically shortened the adsorption equilibrium time (23 min) and enhanced the adsorption capacity (275.6 mg/g-ZrP) of Mt.@ZrP for Cd removal in comparison to those of bare ZrP (220 min, 196.1 mg/g-ZrP). As for soil remediation , Mt.@ZrP presented a faster Cd removal rate than bare ZrP. The residual fraction increased from 22.03% (control) to 28.47% (Mt@ZrP, 1 wt%) and 37.54% (Mt@ZrP, 3 wt%), which significantly decreased the biological efficacy of Cd in the soil. These findings could provide a novel strategy for the design and synthesis of excellent remediation materials for the rapid and efficient removal of heavy metals in water and soil.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Yuchi Liu,Xiaopeng Zhao,Jianbo Yin
Polyethylene oxide (PEO)-salt complex is an important polymer electrolyte-based anhydrous electrorheological (ER) material. However, it is difficult to get PEO-based ER material in particle form owing to the low glass transition temperature . Cross-linking and copolymerization with other polymers are widely used ways to form polyether-salt complex with desired dimensions and stability. However, these ways are relatively complex, and the ionic conductivity of resulting products is also too high for ER application. In this paper, we report a simple way to form PEO-based nanocomposite ER particles by intercalation chemistry with montmorillonite (PEO-MMT) under the help of ethanol solvent. The structure and composition of samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy , thermogravimetry , and so on. An increase in basal d 001 -spacings demonstrates successful intercalation of PEO in MMT. The electro-responsive ER effect of PEO-MMT suspension under electric fields was studied. It demonstrated that PEO intercalation not only effectively solved the problem of difficult granulation of PEO ER material but also replaced the absorbed water in the interlayer of MMT and greatly limited the ionic conductivity of MMT. Under electric fields, the suspension of PEO-MMT nanocomposite was found to show significant ER effect, weak current density, and wide working temperature range. A significant interfacial polarization process was observed by dielectric spectra measurement, which can explain the significant ER effect of PEO-MMT nanocomposite.
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JOURNAL OF SOILS AND SEDIMENTS
·
2023
·Vol. 23
·期 6
·2473-2481
·
IF 3.6
Li Ke-wei,Lu Hai-long,Nkoh Nkoh Jackson,Xu Ren-kou
Purpose Phyllosilicate minerals are the important components in soils and an important source of activated aluminum (Al) during soil acidification. However, the mechanisms for Al activation in phyllosilicate minerals were not understood well. This study was designed to investigate the role of hydroxyl groups on the surface of montmorillonite in acidification-induced activation of solid aluminum. Materials and methods Montmorillonite was treated at high temperatures to remove the hydroxyl groups from its surface, and then XRD, FTIR, and 27 Al NMR of montmorillonite before and after high-temperature treatment were determined. After that, Al activation during acidification of montmorillonite treated at different temperatures was investigated using the constant pH titration method. Results and discussion The results showed that hydroxyl groups on the surface of montmorillonite can effectively be removed when the temperature was raised to 670 °C. After high-temperature treatment, the crystallinity of the montmorillonite was reduced. The montmorillonite layer space was reduced, the pH and cation exchange capacity (CEC) of the mineral were decreased, and consequently the amount of acid consumed during acidification was significantly reduced. The decrease of CEC and surface hydroxyl groups in the mineral was responsible for the reduction in acid consumption during mineral acidification. After high-temperature treatment, the Al coordination structure of montmorillonite was transformed from six-coordination to four-coordination. The removal of surface hydroxyl groups inhibited the activation of Al during montmorillonite acidification, and the inhibition effect was increased with increasing temperatures below the complete dehydroxylation point. Conclusions The activation of Al during montmorillonite acidification was inhibited, suggesting that the hydroxyl groups at the edge of montmorillonite played an important role in Al activation process.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hao Wang,Wenxin Bao,Muhammad Tariq Sarwar,Luyuan Tian,Aidong Tang,Huaming Yang
Local geometric configurations of metal cations in inorganic enzyme mimics determine their catalytic behaviors, while their optimization remains challenging. Herein, kaolinite, a naturally layered clay mineral, achieves the optimization of cationic geometric configuration in manganese ferrite. We demonstrate that the exfoliated kaolinite induces the formation of defective manganese ferrite and makes more iron cations fill into the octahedral sites, significantly enhancing the multiple enzyme-mimicking activities. The steady-state kinetic assay results show that the catalytic constant of composites toward 3,3′,5,5′-tetramethylbenzidine (TMB) and H2O2 are more than 7.4- and 5.7-fold higher than manganese ferrite, respectively. Furthermore, density functional theory (DFT) calculations reveal that the outstanding enzyme-mimicking activity of composites is attributed to the optimized iron cation geometry configuration, which has a higher affinity and activation ability toward H2O2 and lowers the energy barrier of key intermediate formation. As a proof of concept, the novel structure with multiple enzyme-mimicking activities amplifies the colorimetric signal, realizing the ultrasensitive visual detection of disease marker acid phosphatase (ACP), with a detection limit of 0.25 mU/mL. Our findings provide a novel strategy for the rational design of enzyme mimics and an in-depth investigation of their enzyme-mimicking properties.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Miao Jiang,Kun Wang,Gen Li,Qingliang Zhao,Weiye Wang,Junqiu Jiang,Yipeng Wang,Luzi Yuan
Co-contamination of As, Sb, and Pb in soil has aroused public concern due to their wide application in industries. However, the efficient stabilization materials with simultaneous cations and anions stabilization capacities are still lacking and remain a challenge. Herein, a new type of montmorillonite modified by amorphous ferrihydrite ( [email protected] ) was synthesized and the immobilization performance of [email protected] for As, Sb, and Pb in soil was investigated comprehensively, mainly by TCLP, SBET, and DTPA extraction. The stabilization efficiency assessed by TCLP reached 86.28 % for Sb and 94.60 % for Pb after 56 days, and the As could not be detected in the leachate after 10 days. For As, Sb and Pb, the SBET method achieved a reduction of 87.34 %, 54.59 % and 17.59 % respectively. The DTPA extractable content of the metal(loid)s also declined significantly, especially for As. By applying [email protected] , the soil properties as well as the bacterial richness and diversity in the soil were obviously improved. The [email protected] adsorption data are well fitted to the Langmuir model and the pseudo-second-order model. The principal stabilization mechanisms were ascribed to inner-sphere complexation, surface precipitation and co-precipitation, and structural incorporation into [email protected] This is the first study to exhibit the feasibility of [email protected] as an effective and environmentally friendly stabilizer for remediation of As/Sb/Pb co-contaminated soils.
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