MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Yongshuang Hu,Guqing Xiao,Yi Sun,Qiudong Meng
Glyphosate, the most widespread organophosphorus herbicide, enters lakes, rivers and groundwater through rainwater and surface runoff. It is very important to remove glyphosate from neutral water bodies. A new strategy for the development of glyphosate adsorbent was implemented through in situ nanoconfinement of hydrated ferric oxide (Fe 2 O 3 ·nH 2 O) in an anion exchange resin D201 (D201/Fe 2 O 3 ·nH 2 O). Fe 2 O 3 ·nH 2 O was confined within the 12–140 nm pores of D201/Fe 2 O 3 ·nH 2 O, exhibiting uniform distribution, nanoscale and amorphous state. Benefiting from the cross-linked polystyrene network, D201/Fe 2 O 3 ·nH 2 O featured excellent chemical stability in weakly acidic (pH > 3), alkaline and salt solutions. Compared with its host D201, D201/Fe 2 O 3 ·nH 2 O exhibited larger rate constant k 1 , larger glyphosate capacity and superior selectivity at pH = 7.0 ± 0.05. Corresponding its bifunctional groups of -N + (CH 3 ) 3 and Fe 2 O 3 ·nH 2 O, D201/Fe 2 O 3 ·nH 2 O could adsorb glyphosate through the two mechanisms of the ligand exchange between glyphosate anion and hydroxyl group, as well as the anion exchange between Cl − and glyphosate anion. D201/Fe 2 O 3 ·nH 2 O showed the commendable reusability and maintained constant glyphosate adsorption capacities at 161.5–164.5 mg/g in five consecutive adsorption-regeneration cycles. At the injection glyphosate concentration of 1.1 mg/mL, the effective processing volumes of D201/Fe 2 O 3 ·nH 2 O were 3.81 and 3.21 times that of D201 at two breakthrough points.
研究领域:
环境科学
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材料科学
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化学工程
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水资源保护
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污染物处理
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Ting Li,Siyuan Liu,Jianyong Yu,Leiming Guo,Faxue Li
Advanced 2D MXene membranes endowed with size-adjustable transport pathways are greatly desired for tailored separation scenarios. How to construct such membranes in a facile way remains challenging. Herein, we develop an innovative strategy to prepare the MXene-based membranes with stable and highly tunable transport pathways for multiple separation scenarios through sub-nm-confined synthesis. By simply soaking the pristine MXene membranes in the mixed solution of tannic acid (TA) and 3-aminopropyltriethoxysilane (APTES), the chemical reaction of TA and APTES occurred in the sub-nm-scaled interlayer channels of the MXene membranes, inducing the generation of TA-APTES nanoaggregates. The interlayer spacings of the membranes can be continuously regulated in the range of 13.9–17.1 Å, while the water permeances are designated as between 10.5 and 317 L/(m 2 h bar). Moreover, the membranes are capable of effectively rejecting 89.9 % of NaCl or 98.2 % of MgSO 4 or 100 % of dyes on demand. The developed strategy of sub-nm-confined synthesis makes the constructed membranes much more stable than previously reported ones and suitable to the high-efficient separation of dye/salt mixtures. The intercalated membranes outperform most of other nanofiltration membranes in separating either NaCl or MgSO 4 or dye/salt mixtures. This work paves a new and facile way to construct advanced 2D membranes with desired transport pathways for multiple separation scenarios.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2014
·
IF 4.835
Li Ping Wang,Qi Feng Li,Chao Wang,Xiao Zheng Lan
Solid–liquid phase behaviors of the hexadecane–octadecane (n-C16H34–C18H38, C16–C18) system in the bulk, and confined in controlled porous glass (CPG) are investigated using differential scanning calorimetry and temperature-dependent powder X-ray diffraction. Bulk C16–C18 mixtures show the special rotator phase RI, and two intermediate phases with monoclinic (Mdcp) and orthorhombic (Op) structures. Inside CPG (8.1 and 300 nm), the RI and Op phases could be found in wider compositions of the solid mixtures than the bulk, however the Mdcp form was not observed. Unexpectedly, under the confinement of CPG (8.1 nm) not only the rotator RI appeared in the two pure components, C16 and C18, but a rotator phase RII occurred in the pure C18 and most of the mixtures upon heating. These new phase behaviors of the confined alkanes could be attributed to the size effect and the interface interactions. According to XRD analysis, in the small pores of CPG (8.1 nm) the alkane molecules effectively take the 2D arrangements. While in the large pores of CPG (300 nm), they take ordered packing to some extent both in the lamellar and lateral directions.
研究领域:
物理化学
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
·
IF 9.5
Yan Zhai,Mengxiao Lv,Fei Shan,Tao Qi,Siwen Cui,Hao Lan,Jun-Peng Wang
Polymers exhibiting photoinduced solid-to-liquid phase transitions have garnered significant attention due to their potential applications in smart materials. However, the simultaneous achievement of high strength and extensibility remains a significant challenge. In this work, we present an innovative approach to overcome this limitation by incorporating coordination bonds into the polymer backbone. Specifically, we have developed a photothermal solid-to-liquid transition polymer (PSLTP) based on PTMG oligomers end-capped with ligand motifs that coordinate with lanthanide (La3+) ions. Upon exposure to 365 nm light, the polymer efficiently absorbs photons and converts them into thermal energy, inducing the dissociation of coordination bonds and triggering a reversible solid-to-liquid phase transition. The resulting nanoconfinement phases, due to coordination bond-induced structures, significantly enhance the polymer's mechanical properties, including a tensile strength of 22 MPa and a break elongation of 1240%. These unique properties render the polymer particularly promising for applications requiring reversible bonding and self-healing capabilities for large-scale damages. This study underscores the potential of coordination bond-based systems in the design of photothermal polymers, offering insights into their underlying mechanisms and practical applications in responsive materials.
研究领域:
材料科学
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高分子化学
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智能材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Uddin Sk Raihan,Jingqi Zhang,Jingbo Chao,Qing Hu,Frederic Coulon,Xiao Jin Yang
Chlorinated phenols are highly toxic to human and ecosystem and their biological degradation is difficult. In this work, a novel MgAlNi alloy catalyst was developed for rapid chemical degradation of p-chlorophenol (4-CP) in water under mild conditions via in situ hydrodechlorination ( i HDC) without external hydrogen gas supply. A complete conversion of 0.195 mM 4-CP to phenol was achieved within 15 min with a reaction rate constant of 7.65 h −1 , 19.4 times higher than that of the traditional Raney Nickel (AlNi alloy) catalyst. The excellent performance of MgAlNi alloy catalyst is attributed to enhanced H 2 generation by Mg etching, surface self-reconstruction by growth of in situ layered double hydroxide ( i LDH) nanosheets of 0.08–1 nm, exposed active sites of AlNi intermetallic compounds Al 3 Ni 2 and Al 3 Ni. The findings of this study provide new insights into broader applications of nanoconfinement catalysis to environmental remediation and open a new domain of in situ nanoconfinement catalysis ( i NCC).
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Qianyu Wang,Changchang Ma,Dandan Liu,Shushan Song,Ziheng Song,Weijie Zhang,Huarui Han,Jiasheng Zhu,Kai Wei,Sheng Feng
Confining nano zero-valent iron (nZVI) into porous materials could prevent its aggregation and passivation. In this study, we confined nZVI into the cavity of zeolitic imidazolate framework-8 (ZIF-8) via sequential pre-adsorption ferric ion (Fe(III)) and NaBH 4 reduction processes. The optimized Cr(VI) removal rate of ZIF-8 confined nZVI (nZVI@ZIF-8) reached 1.2 × 10 −1 min −1 , 9.2- and 37.5-fold that of nZVI and ZIF-8, respectively. Interestingly, the removal rate constants of nZVI@ZIF-8 toward Cr(VI) still reached 9.6 × 10 −2 min −1 and 6.7 × 10 −2 min −1 with initial pH of 7.0 and 9.0, respectively, 13.0 (7.4 ×10 −4 min −1 ) and 23.9 times that of nZVI. More importantly, channels confinement significantly improved the reactive lifetime of nZVI for Cr(VI) removal. The electro-donating -NH 2 provided positive charge sites for CrO 4 2- or HCrO 4 - adsorption. Subsequently, the difference of Fermi level between nZVI and ZIF-8 drove electrons transfer from nZVI to ZIF-8 for surface Cr(VI) reduction. This study provides an avenue to enhance the performance of nZVI toward heavy metal ions removal by coupling surface adsorption and nano confinement.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Min Tang,Wu Liu,Zhiyong Wang,Zhaoduan Hu,Jinquan Wan,Rui Peng
Advanced oxidation processes (AOPs) are highly effective for removing emerging contaminants from water. However, their efficiency is often limited by sluggish catalytic oxidation, excessive input of chemicals and energy for organic mineralization, and undesirable carbon emission. Current improvements mainly focus on enhancing catalyst activation, often neglecting the elimination step of contaminants. This study presents a confined energy-drive strategy to shift the removal pathway of 2,4,6-trichlorophenol (TCP) from degradation mineralization to oxidative coupling polymerization. Nanosphere catalysts (Fe-NC-x, where x = 1, 2, 3, 4) with varying channel diameters were developed by loading iron into nanochannels of different sizes. The confined Fe-NC-1 catalytic system achieved a remarkable 99 % TCP removal within 40 min, in contrast to the 69 % removal observed with the non-confined Fe-NC-0 catalytic system. As the channel confinement decreased, the TCP removal efficiency increased. This enhanced performance is attributed to the in-situ confined energy generated by Fe-NC-1 nanochannels (< 5 nm), which promotes peroxydisulfate pre-adsorption and accelerates electron transfer between peroxydisulfate and the catalyst. Furthermore, the confined energy stabilizes the oxidation transition state of TCP, favoring the low-energy barrier coupling polymerization pathway. This study provides a green and sustainable strategy for AOPs through confined energy-driven, low-carbon methods for water purification and organic carbon recovery.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 7
·1487
·
IF 4.6
Senliang Xi,Dawei Xu,Renzeng Chen,Wenhao Yao,Wenying Wu,Teng Zhang,Liang Yu
Ammonia borane (AB) has attracted much attention in the field of solid-state hydrogen storage due to its high hydrogen storage capacity. Nanoconfinement in UiO-66 can reduce the hydrogen release temperature. In particular, terephthalic acid was used as a linker to further improve the dehydrogenation properties through the modification of -NH2, -OH, -NO2, -Br, and -F groups. The hydrogen release content of 0.5AB/UiO-66 was 1.98 wt.%, whereas the hydrogen release content of UiO-66-2OH modified by -OH groups increased to 3.85 wt.%. The non-covalent interaction results show that -NH2and -OH preferred adsorption with -BH3, and the H in -NH2and -OH were able to interact directly with the H in AB to modify the dehydrogenation process of AB, whereas -NO2, -Br, and -F indirectly affected the charge density of hydrogen atoms in AB to alter the dehydrogenation property of AB. The modification of functional groups provides a theoretical basis for the design of high-performance MOF nanoconfinement AB composite hydrogen storage materials.
研究领域:
材料科学
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氢能存储
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chen Wang,Mingjie Huang,Wentao Hu,Wei Xiang,Tao Zhou,Juan Mao,Feixiang Zan,Xiaohui Wu
The carcinogenic and hard-to-dispose Cr(VI) in high-salinity industrial wastewater has caused severe environmental problems. Herein, a novel hollow spherical CuFe 2 O 4 spinel oxide with concentrated confined oxygen vacancies (HS/CuFe 2 O 4 -OVs) was developed for Cr(VI) decontamination. Such a fancy material delivers a remarkable removal rate of 0.041 min −1 , approximately-one order of magnitude higher than the commonly reported iron-based materials. The OVs in the confined space could exert dual effects on Cr(VI) removal from the aspects of enhanced stabilization via local electronic structure regulation and strengthened immobilization via electron conductivity modulation. Importantly, due to the highly sensitive response of Cr(VI) to the changed confined OVs content, the HS/CuFe 2 O 4 -OVs showed higher selectivity for Cr(VI) removal in the interference of high concentration salts than its nonhollow-structured counterpart and can successfully treat Cr(VI)-contaminated industrial wastewater with high salinity. This work opens up a new concept for rational design of robust spatial confined architectures for Cr(VI) treatment.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Xuening Wang,Zhao Jiang,Jieshu Qian,Wanyi Fu,Bingcai Pan
In the development of nanoenabled technologies for large-scale water treatment, immobilizing nanosized functional materials into the confined space of suitable substrates is one of the most effective strategies. However, the intrinsic effects of nanoconfinement on the decontamination performance of nanomaterials, particularly in terms of structural modulation, are rarely unveiled. Herein, we investigate the structure evolution and decontamination performance of iron (hydr)oxide nanoparticles, a widely used material for water treatment, when confined in track-etched (TE) membranes with channel sizes varying from 200 to 20 nm. Nanoconfinement drives phase transformation from ferrihydrite to goethite, rather than to hematite occurring in bulk systems, and the increase in the nanoconfinement degree from 200 to 20 nm leads to a significant drop in the fraction of the goethite phase within the aged products (from 41% to 0%). The nanoconfinement configuration is believed to greatly slow down the phase transformation kinetics, thereby preserving the specific adsorption of ferrihydrite toward As(V) even after 20-day aging at 343 K. This study unravels the structure evolution of confined iron hydroxide nanoparticles and provides new insights into the temporospatial effects of nanoconfinement on improving the water decontamination performance.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Fang Zhenyuan,Li Xiang,Bai Yajie,Zhang Yuhui,He Guandi,Pang Shuai,Xia Fan,Peng Daoling,Zhang Xiqi,Jiang Lei
Ideal laminar membrane reactors (LMR) necessitate the rational construction of 2D nanoconfined channels and regulation of microenvironment. The intrinsic structure-activity relationship of laminar membrane reactors essentially remains unclear. Herein, amorphous/crystalline HTiNbO 5-X nanosheets (NS) with abundant oxygen vacancy (V O ) are successfully prepared and stacked as 2D sub-nanoconfined membrane flow reactors with different interlayer spacings. When the interlayer spacing is decreased to 11.0 Å, the representative HTiNbO 5-X membrane exhibits impressive conversion of ≈ 100% within 26.6 s and turnover number of up to 306.42 for the esterification of benzyl alcohol at 23 °C. The combination of structural characterizations and theoretical calculations reveals that the synergistic effect of V O and sub-nanoscale confinement greatly promotes the adsorption and orbital symmetry matching of reactants, and reduces the overall energy barrier. Furthermore, the HTiNbO 5-X LMR is accessible for other alcohol derivatives, indicating the efficient and green synthesis of acetate ester flavours under mild conditions. This work demonstrates the promising potential of the metal oxide nanosheets to create inorganic laminar membrane reactors for continuous organic synthesis.
研究领域:
膜反应器技术
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纳米材料
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催化化学
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有机合成
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绿色化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Hanqing Lin,Ke Gong,Petr Hykys,Danke Chen,Wen Ying,Zdenek Sofer,Youguo Yan,Zhen Li,Xinsheng Peng
CO 2 separation and recovery technology is a significant part of resolving the global greenhouse issue. In order to develop a cost-effective and high-performance method to realize CO 2 separation, a new kind of supported liquid membrane was configured by incorporating deep eutectic solvent into the nanoslits of titanium carbide (Ti 3 C 2 T x ) membrane. The deep eutectic solvent is a novel ionic liquid analogous with equal physical and chemical advantages but more economical and environmental benign. And the Ti 3 C 2 T x , as a neoteric two-dimension material, can serve as a valid platform for supporting the deep eutectic absorbent. By combining the two kinds of material, the resultant Ti 3 C 2 T x supported deep eutectic liquid membrane shows good CO 2 preference against other light gases as well as high thermal stability and long-term durability. The permeance of CO 2 is about 26.35 GPU with selectivity over N 2 , CH 4 and H 2 are 319.15, 249.01 and 12.38, respectively. The molecule dynamic simulation is also applied to uncover the separation mechanism of CO 2 and the ingredient redistribution and interionic refactor phenomenon of deep eutectic solvent trapped in the Ti 3 C 2 T x nanoslits.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）