Nanomaterials
·
2025
·Vol. 15
·期 4
·283
·
IF 4.3
Zhiyuan Song,Sidra Chaudhary,Zainab Bibi,Yong Wu,Qinxiang Jia,Xiaoyong Li,Yang Sun
Two hydrophilic copolymers containing functional groups such as carboxyl, amido, and sulfonic acid are synthesized using ammonium persulfate-catalyzed free radical polymerization in water. Aluminum sulfate is then introduced, resulting in two polymer complexes that exhibit reduced cement setting times (initial, 1.16–2.44 min; final, 2.02–3.14 min) and improved compressive (24 h, 5.81–7.25 MPa) and flexural (24 h, 2.80–2.99 MPa) strengths compared to pure aluminum sulfate-facilitated cementing (initial, 19.11 min; final, 37.05 min; compressive, 24 h, 5.51 MPa; flexural, 24 h, 2.56 MPa). Following this, ball-milled illite powder is added, and the resulting admixtures further display slightly prolonged setting times (initial, 2.35–2.99 vs. 1.16–2.44 min; final, 3.98–4.35 vs. 2.02–3.14 min), along with comparable compressive strengths (5.85–7.11 vs. 5.81–7.25 MPa) and enhanced flexural strengths (3.92–5.83 vs. 2.80–2.99 MPa). Notably, a unique adhesive pozzolanic clinker, Ca54MgAl2Si16O90(54CaO·MgO·Al2O3·16SiO2), emerges in the presence of illite-based admixtures, contributing to the mechanical strength development of the hydrated mortars. Although illite itself is hydrophobic, the coating of ball-milled illite powder with aluminum sulfate and copolymers facilitates its dispersion into the gaps and pores of the cement matrix during setting, thereby increasing the flexural strength. This work presents an interesting approach to utilizing illite materials in cement applications, which is significant for reducing CO2emissions during cement production and use.
研究领域:
材料科学
·
土木工程
·
化学工程
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产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Xinyu Li,Shunyu Han,Dongdong Guan,Nanzhe Jiang,Jingzhe Xu,Sang-Eon Park
The direct synthesis of H-ZSM-5 catalysts from natural aluminosilicate clays is important for the conversion of raw clay resources to high-value-added products. Herein, the solid-like-state conversion was used to directly prepare nano-H-ZSM-5 with uniform morphology and particle size (~300 nm) from leached illite (ISR) as both Si and Al source. Crystallization kinetics indicated that the reactivity of ISR is similar to that of commercially fabricated products and ISR could be rapidly (within 5 h) converted into nano-H-ZSM-5, the crystallinity , morphology, and crystal size of which were strongly affected by the amount of tetrapropylammonium hydroxide (TPAOH). Additionally, the residual Al of ISR uniformly intruded the H-ZSM-5 framework to provide active sites for the methanol-to-aromatics reaction. The catalytic performance stability and BTX selectivity of nano-H-ZSM-5 for this reaction surpassed those of a commercial ZSM-5 catalyst because of the synergistic effect among the specific surface area and volume of micropores , uniform morphology and particle size, and homogeneously distributed acidic sites. This rapid, efficient, and cleaner synthesis reported herein was shown to have no necessity of ion exchange with ammonium salts, to be H-form of ZSM-5 as well as improve the productivity of HZSM-5 catalysts. And consequently, it is expected to reduce the cost of synthesis and provide an opportunity for the comprehensive development and utilization of illite clay resources.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2024
·
IF 5.3
Yaniv Freiberg,Benayah Bar-Yosef,Pinchas Fine,Mikhail Borisover,Irit Levkovitch,Shahar Baram
Humic substances (HS) are frequently incorporated into soils to improve soil health and nutrient availability. However, existing literature presents discrepancies regarding the soil-HS interactions and their impact on orthophosphate (inorganic phosphorus (IP)) adsorption, specifically, concerning the influence of soil clay mineralogy on these interactions. This study aims to investigate whether the impact of soluble humic acid (HA) on IP adsorption in semi-arid Mediterranean soils is contingent upon their clay mineralogy . This was tested by constructing IP- adsorption isotherms in the presence and absence of HA of four illite/smectite (I/S) or kaolinitic dominated soils. The results revealed that the addition of HA increased IP adsorption to I/S soils by up to 80%, yet IP did not affect HA adsorption to these soils. This suggests that while HA and IP are adsorbed onto different sites on the I/S clay, HA adsorption probably increases the number of adsorption sites accessible for IP. In contrast, IP and HA adsorption onto the kaolinitic soil was fully competitive: IP reduced HA adsorption and vice versa. It is suggested that new adsorption sites for IP resulted from the HA interactions with the I/S clay planar surfaces. In addition, HA moieties containing cationic (ionized) nitrogen, could possibly interact with clays to increase the number of platelets per tactoid. Unlike I/S clays, kaolinite that possesses low degree of isomorphic substitution, low net negative charge, and high degree of platelets stacking, does not tend to such interactions with HA. Instead, HA will be adsorbed mostly onto the clay edges, competing with IP on adsorption sites.
研究领域:
土壤学
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环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Jiahao Zhang,Xuanyu Ren,Dongni Li,Zhiqiang Dong,Jiaqi Wang,Li Ren,Bing Xue,Fangfei Li
With deeper understanding of the harm of ultraviolet (UV) ray radiation , more and more attentions have been paid on developing UV shielding agents with better price-quality ratio. In this article, TiO₂ nanorods with three types of crystalline structures (anatase, brookite, and rutile) and their composites with natural illites were prepared by hydrothermal method under appropriate glycolic acid and pH environment. The resultant samples were analyzed by XRD , SEM , XPS , TEM, UV–vis spectrum and UV aging testing. The results confirm that both the aspect ratio and the crystalline structures of TiO₂ nanorods greatly affect the UV shielding performances of TiO₂ films. Compared with anatase and brookite, rutile TiO₂ nanorods with the best aspect ratio (around 3.5) display the best UV shielding performance. Furthermore, after loaded by natural illite micro-sheets, the illite-TiO 2 composites display better UV shielding performance than pure TiO₂ nanorods , due to the physical reflection effect and interfacial coupling effect of illite micro-sheets. When the loading amount ratio reaches to 1:1, the illite-TiO 2 composite loaded with rutile TiO₂ nanorods display the best UV shielding performance. And such coating is confirmed to be greatly helpful in protecting cotton fabrics from fractures caused by UV aging. The best illite-TiO 2 composite can significantly increases the retention tensile strength of cotton fabrics by 47 % against UV radiation . The resultant novel illite-TiO 2 composite provides a promising method to product better UV shielding agents for practical applications, which displays lower cost, nearly non-toxic, better aqueous dispersion, controlled UV–vis spectral characteristics , and higher UV shielding performances.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
WATER RESOURCES RESEARCH
·
2020
·Vol. 56
·期 11
·e2019WR027037
·
IF 4.309
Tao Wu,Yuankai Yang,Zhifen Wang,Qiang Shen,Yanhua Tong,Moran Wang
Accurate understanding of diffusion of anionic radionuclides in different clays is significant to predict long-term performance of high-level radioactive waste (HLW) repositories. The importance of electrical double layer (EDL) on anionic tracer diffusion in different clays has been studied by both through-diffusion experiments and pore-scale simulations in this work. The through-diffusion experiments measured the effective diffusion coefficient and the accessible porosity of Re (VII) in compacted montmorillonite, Na-bentonite, and illite/smectite mixed layer (I/S) at different salinities. The results showed that the accessible porosity and the effective diffusion coefficient of Re (VII) in montmorillonite and Na-bentonite were similar but lower than those in I/S under the same conditions. For mechanism analysis and predictions, a pore-scale modeling was implemented to simulate the diffusion of anions in compacted clays. In the simulations, the characteristics (porosity, density, and total surface area) of microstructures of montmorillonite and I/S were used to regenerate three-dimensional pore structures numerically by a Quartet Structure Generation Set method. The Re (VII) diffusion was then simulated by directly solving coupled Poisson-Nernst-Planck equations via the lattice Boltzmann method. The diminished effect of EDL was therefore calculated and compared with Donnan and multiporosity models. As EDLs overlap in compacted clays, the Donnan model overestimates the influence of EDL on Re (VII) diffusion, while the multiporosity model underestimates it. The pore-scale modeling, which captures the structure of overlapping EDLs automatically, can simulate the diffusion of anionic radionuclides in compacted clays without any fitting parameters. Key Points A method to link through-diffusion experiments and a pore-scale modeling Prediction of Re (VII) diffusion in montmorillonite, Na-bentonite, and illite/smectite mixed layer Effect of the electrical double layer on Re (VII) diffusion in illite/smectite mixed layer decreases compared with that in montmorillonite
研究领域:
地质学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2016
·Vol. 311
·期 1
·655-661
·
IF 0.983
Wang Zhifen,Zhang Jianying,Chen Jiang,Zhang Zhiqiang,Zheng Qing,Li Jinying,Wu Tao
A through-diffusion method was used to investigate the Re(VII) (as a surrogate to 99 Tc(VII)) diffusion in compacted illite-, hematite- and limonite-montmorillonite mixtures. The effective diffusion coefficient D
e values were in the range of (4.29–6.71) × 10 −11 m 2 /s at pH 3.0 and (3.44–5.72) × 10 −11 m 2 /s at pH 9.0, respectively. Compared to montmorillonite, both D
e and α values enhanced at least three-folds in montmorillonite mixtures, indicating that the impurities changed the diffusion path. Interestingly, the K
d values of (0.63–3.94) × 10 −4 kg/m 3 were found in montmorillonite mixtures. However, the change of D
a value was less than two-folds, indicating that the illitization and iron corrosion of a back-fill material had no obvious influence on Re(VII) diffusion velocity.
研究领域:
环境科学
·
放射性废物管理
✓ 已验证
产品关联
DOI
高影响因子
Pharmaceuticals
·
2025
·Vol. 19
·期 1
·11
·
IF 4.8
Zhiqing Liu,Wenhua Huang,Shanhua Xu,Meilan Nan,Xian Cui,Yue Wang,Zhehu Jin,Wan Meng,Jingbi Meng,Longquan Pi
Background:Topical minoxidil remains the only FDA-approved treatment for hair loss, yet its clinical efficacy is compromised by organic-solvent-induced scalp irritation and poor patient adherence. This study aimed to evaluate natural illite as a carrier for minoxidil and to explore its potential hair-growth-promoting mechanisms.Methods:Thermal–acid-modified illite was engineered as a spray-dried, hydroalcohol-free minoxidil carrier for topical application. Hair regrowth efficacy was assessed in C57BL/6 mice via a 14-day depilation model. Mechanisms were elucidated via RNA-seq, Ki67/TUNEL immunofluorescence, and p-STAT3 immunohistochemistry.Results:Modified illite resulted in a 4.2-fold surface area increase and successful minoxidil loading. The minoxidil/illite formulation demonstrated efficacy equivalent to that of free minoxidil while also eliminating solvent toxicity. Mechanistic analysis revealed that illite functions as an active carrier: both the illite-alone and minoxidil/illite-treated groups exhibited increased Ki67+proliferation and reduced TUNEL+apoptosis. Transcriptomic profiling demonstrated dual mechanisms—enrichment of Myc proliferation pathways and suppression of IL-6 inflammatory signaling (p< 0.001)—with reduced p-STAT3 expression confirmed by immunohistochemistry.Conclusions:These findings suggest that an illite-based carrier can enable topical delivery of minoxidil with preserved efficacy and that illite itself exhibits intrinsic hair-growth-promoting activity via anti-inflammatory and pro-proliferative mechanisms, which may help alleviate adherence barriers associated with conventional topical alopecia therapy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Reports
·
2023
·
IF 5.2
Xingxing Ding,Qing You,Jianfa Wu,Jian Zhang,Jiawei Liu,Caili Dai,Ning Sun,Linan Wei,Yongpeng Sun
With high clay content in shale gas reservoir, the hydration is easy during hydraulic fracturing, which will affect the fracture conductivity and productivity of gas wells. The illite content of the Longmaxi formation shale in Yongchuan District is high (more than 80% of clay mineral content), and gas wells have a high productivity after fracturing and shut-in. However, the hydration effect mechanism of fracturing fluid on illite rich shale is not clear. Therefore, in this paper, core hydration experiments are performed for the illite rich shale reservoir. The water imbibition characteristic of near-fracture shale is obtained, and the micro-morphology and microfracture development characteristics of hydration are studied. Moreover, the hydration mechanism of near-fracture shale is then explored from the aspects of ion diffusion and mineral interlayer spacing variation. It is deduced that the fracturing fluid is spontaneously imbibed into small pores preferentially during well shut-in after fracturing. After the near-fracture shale is touched by water, some clay minerals peel and fall off from the fracture surface after hydration, accompanied by the development of microfractures. The interlayer spacing of clay minerals expands (smectite expands by 8.8% and illite 1.5%) after water immersion, and the ion diffusion occurs. The first 15 h is the rapid diffusion stage (surface effect), while the second 15 h is the stable rising stage (internal effect). This study systematically analyzes the hydration characteristics of near-fracture illite rich shale and reveals its hydration mechanism, which are crucial for the optimization of well shut-in time and exploitation system of shale gas reservoir after fracturing.
研究领域:
石油工程
·
地质学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Shuang Zhai,Qing Zheng,Mingqiao Ge
A catalyst was prepared using illite coated with Co 3 O 4 to activate peroxymonosulfate (PMS) for polyvinyl alcohol (PVA) degradation. The variance of valence of specific elements, functional groups, surface morphology, and pore structure of fresh illite, fresh Co 3 O 4 @illite and used Co 3 O 4 @illite were also investigated, reflecting the excellent stability of the Co 3 O 4 @illite catalyst. Degradation experiments confirmed that OH ∙ , 1 O 2 , and SO 4 ∙ - produced by oxygen cavitation reaction acted a significant part in PVA degradation. Moreover, when initial pH = 7, catalyst dosage = 2.0 g/L, PMS concentration = 40 g/L, T = 298 K, the best PVA removal efficiency was got. Also, the adding of H 2 PO 4 − and Cl − concentration could inhibit the degradation of PVA at first and then promoted, while the addition of other ions (i.e., HCO 3 − and CO 3 2− ) always inhibited degradation reaction. The transformation products on the possible degradation pathway of PVA were then proposed. The strategy of this study gave a new perspective for the coming design of the natural-mineral-based catalysts to effectively treat waste through the Fenton like processes.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
·
2024
·
IF 1.9
Xiaoyu Yin,Yufan Zhao,Peng Guo,Peng Wu,Chao Chen,Aiming Zhang,Jiali Liao,Yuanyou Yang,Ning Liu,Tu Lan
The presence of carbonates or humic substances (HS) will significantly affect the species and chemical behavior of U(VI) in solution, but lacking systematic exploration of the coupling effect of carbonates and HS under near real environmental conditions at present. Herein, the sorption behavior of U(VI) on illite was systematically studied in the co-existence of carbonates and HS including both humic acid (HA) and fulvic acid (FA) by batch technique. The distribution coefficients ( K d ) increased as function of time and temperature but decreased with increasing concentrations of initial U(VI), Ca 2+ , and Mg 2+ , as well as ion strength . At pH 2.0–10.5, the K d values first increased rapidly and then decreased visibly, with its maximum value appearing at pH 5.0, owning to the changes in the interaction between illite and the dominant species of U(VI) from electrostatic attraction to electrostatic repulsion. The sorption was a heterogeneous, spontaneous, and endothermic chemical process, which could be well described by pseudo-second-order kinetic and Flory-Huggins isotherm models. When carbonates and HA/FA coexisted, the K d values always increased first and then decreased as a function of pH, with the only difference for HA and FA being the key pH (pH key ) at which the promoting and inhibiting effects on the sorption of U(VI) onto illite undergo a transition. The carbonates and HS have a synergistic inhibitory effect on the U(VI) sorption onto illite at pH 7.8. FTIR and XPS spectra demonstrated that the hydroxyl groups on the illite surface and in the HS were involved in U(VI) sorption on illite in the presence of carbonates. These results provide valuable data for a deeper understanding of U(VI) migration in geological media.
研究领域:
环境科学
·
地球化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jing Yang,Li Li,Jie Wang,Meng Li,Hongxi Zhang,Liang Wei,Xiande Yang
Hybridized zinc silicate adsorbent (Zn–Si/(I/S)) with excellent adsorption property was synthesized by hydrothermal-roasting process based on Illite/Smectite (I/S) clay. The morphological structures and elemental compositions of adsorbents were analyzed by various characterization techniques, and the Zn–Si/(I/S) adsorbent had a 2-D film-like structure. In addition, the average pore size was obviously increased. The Zn–Si/(I/S) adsorbent had a good adsorption performance for cationic dyes and antibiotics, and the adsorption process was influenced by the structure, pore size, type and surface groups of the pollutants. The results of adsorption isotherm, kinetic and thermodynamic model fitting showed that: i) the adsorption performance depended on the pore size and surface charge rather than the specific surface area, ii) the proposed second-order kinetic model and Freundlich isotherm model fitted the adsorption process of RhB better, iii) the thermodynamic analysis proved that the adsorption process proceeded spontaneously by heat absorption. In summary, the adsorption mechanism was controlled by electrostatic attraction, chemical conjugation, ion exchange, hydrogen bonding interactions and pore adsorption.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 11
·9260-9268
·
IF 3.201
Hao Ju,Yinshan Jiang,Bing Xue,Yuanjun Xu,Honggang Guo,Mingyuan Huo,Fangfei Li
Illite/TiO2 nanocomposites have been successfully synthesized by the hydrothermal method. Phase and microstructural analysis confirmed that TiO2 nanocrystals were loaded on the surface of illite with a strong chemical bond. The as-prepared illite/TiO2 samples presented high UV shielding performance with increasing TiO2 content. The PIT-50% sample exhibited the best UV shielding performance, blocking almost 100% of UVC, over 98% of UVB and nearly 60% of UVA while having poor photocatalytic activity. Furthermore, the illite/TiO2 powders were dispersed more homogeneously on the matrix when compared to TiO2, and their photocatalytic activity could be adjusted to a suitable range to achieve better UV shielding performance. Therefore, unlike the traditional rutile UV blocker, this novel illite/anatase blocker can display desirable UV shielding properties, especially at longer irradiation times, and the fabric maintained 71.35% tensile strength after the UV aging test with half the amount of TiO2. All these results indicate that illite/anatase nanocomposites are promising UV shielding materials for textiles and polymers, with regard to both cost and performance.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）