INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Jiayu Ouyang,Xuefeng Zhang,Xinmiao Qi,Caichao Wang,Yao Yuan,Xiangjing Xie,Jianzheng Qiao,Xin Guo,Yiqiang Wu
To address the issue of bisphenol A (BPA) contamination in wastewater, a novel hydrogel, sodium alginate/cellulose nanofibrils/ZIF-8 composite hydrogel (SCZC), was synthesized for efficient BPA removal. The SCZC exhibited an exceptional adsorption capacity of 1696 mg/g, aligning well with both Langmuir and pseudo-second-order models. Furthermore, it exhibited remarkable regeneration properties, maintaining 89.1 % of its adsorption capacity even after undergoing five adsorption-desorption cycles. The synthesized SCZC also acted as a fluorescent sensor for detecting BPA, employing dynamic quenching and offering linear detection ranges of 10–100 mg/L and 0.2–1.0 μg/L, with a low detection limit of 0.06 μg/L. Analysis of adsorption and detection mechanisms revealed that SCZC's exceptional performance could be attributed to the three-dimensional (3D) porous structure formed by sodium alginate and cellulose nanofibrils. Economic analysis indicated that SCZC, in comparison to commercially activated carbon, was relatively inexpensive. This study introduces a novel approach for designing and preparing a sodium alginate-based hydrogel incorporating metal-organic frameworks, offering simultaneous BPA detection and removal capabilities.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yang Feng,Mengyi Yuan,Lan Zhang,Tingting Zhang,Shiying Wu,Lujie Li,Lingling Wang,Weihua Li,Rui Lu
This study reports the development of an electrostatic self-assembly surface-enhanced Raman scattering (SERS) substrate based on zeolitic imidazolate framework-8 (ZIF-8) decorated with silver nanoparticles (AgNPs). A seed-mediated growth method was employed to synthesize AgNPs with an average diameter of 30 nm, and a mild synthesis process was used to prepare ZIF-8 nanoparticles with an average diameter of 350 nm. The ZIF-8/Ag nanocomposites have been optimized and characterized using a variety of techniques. As a probe molecule, 4-aminothiophenol was used to evaluate the SERS performance of the ZIF-8/Ag nanocomposites, demonstrating low limit of detection to 8.32 × 10 −8 M, respectively. ZIF-8/Ag nanocomposites also demonstrated good signal reproducibility with a relative standard deviation of 12.5 % for 10 −6 M 4-aminothiophenol. Furthermore, the ZIF-8/Ag nanocomposites have successfully been used to detect 4-mercaptopyridine and the pesticide thiram in laboratory tap water with recoveries ranging from 87 % to 113 %. The ZIF-8/Ag nanocomposites were further investigated for their potential use as SERS substrates for the detection of thiram residues on the surface of apples. A finite difference time-domain simulation was also conducted to investigate the SERS enhancement mechanism of the ZIF-8/Ag nanocomposites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shaodong Bai,Jianjiang Mao,Fengshou Yu,Fei Cheng
Solid-state electrolytes (SSEs) can replace the diaphragm and electrolyte in the traditional battery to solve safety perils such as electrolyte leakage and combustion, while their practical application is greatly hindered by their low ionic conductivity and poor ability to inhibit lithium dendrites. Herein, a laponite (LAP)/zeolitic imidazolate framework-8 (ZIF-8) hybrid material modified polyvinylidene fluoride (PVDF)-based composite polymer electrolytes (CPE) is reported. The in-situ modification of ZIF-8 induced by electrostatic interactions between LAP layers not only improves the dispersion of LAP, but also acts as an external bridge through hydrogen bonding with PVDF to construct a stable conductive network. The extended and compatible polymer-nanofiller hybrid interface enables continuous ion migration paths and effectively reduce the crystallinity of PVDF. Moreover, the Lewis acid site and high porosity of ZIF-8 can not only promote the dissociation of lithium bis (trifluoromethanesulphonyl) imide (LiTFSI), but also limit the movement of TFSI − , further improving the ionic conductivity. Benefiting from the synergistic enhancement effect of hybrid interface, the obtained CPE demonstrated an excellent ionic conductivity of 6.77 × 10 −4 S cm −1 at room temperature and a satisfactory ion transference number of 0.60 together with superior electrochemical window of 5.3 V and good mechanical strength. The assembled Li metal battery shows a high capacity retention rate is 95 % after 150 cycles at 1C, indicating a significant inhibitory effect on lithium dendrites.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Hongfei Jia,Yangchen Wang,Lizi Yang,Ran Fang
Lithium metal, a pivotal element in modern electric vehicles and electronics, necessitates secure and sustainable supply chains. Extracting lithium from brines presents significant challenges, particularly when dealing with high magnesium-to-lithium ratios, due to the nearly identical ionic radii of lithium and magnesium ions. Herein, we propose an innovative strategy for the selective separation of Li + /Mg 2+ by integrating ZIF-8-NH 2 into polyamide membranes through the interfacial polymerization (IP) of polyethyleneimine (PEI) and trimesoyl chloride (TMC). The synthesized PEI@ZIF-8-NH 2 + TMC membranes exhibit an impressive permeation rate for Li + of 0.863 mol m -2 h -1 , alongside a Li + /Mg 2+ selectivity ratio of 33.06. The unique pore structure of ZIF-8-NH 2 and surface chemistry facilitate efficient Li + /Mg 2+ separation, driven by synergistic interactions such as elevated positive surface charges, subnanometer channels, and strong π-π stacking with polyamide layers. These developments are anticipated to augment both the selectivity and durability of MOF-based membranes, providing new directions for research and practical implementations in ion separation technology.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Shuqian Meng,Xiaoqian Ju,Jingwen Wang,Baolu Cui,Yuxi Liu,Haosheng Ma,Dechao Wang,Zhiyuan Yang
Carbon capture, utilization, and storage (CCUS) is a crucial technology for achieving carbon reduction targets. The key to CCUS technology lies in developing and designing efficient and low-cost CO 2 capture materials. Metal-organic frameworks (MOFs) have emerged as promising CO 2 adsorbents in the field of carbon capture. However, high agglomeration of nanoparticles and high cost have severely hindered the application of MOF-based solid adsorbents. This study employs an in-situ growth method to prepare a novel “corncob-shaped” PHNT@ZIF-8 composite material. During the reaction process, surface modification of halloysite nanotubes (HNT) enhances the interaction between HNT and ZIF-8. The resulting PHNT@ZIF-8 exhibits an enhanced CO 2 adsorption capacity of 1.48 mmol/g. Notably, the functionalized PHNT@ZIF-8 as CO 2 adsorbents demonstrated significant adsorption properties: a high specific surface area of 409.74 m 2 /g, good selectivity in simulated flue gas composition of 15%/85% (CO 2 /N 2 ) (39.1), excellent thermal stability, and superior regenerability. Moreover, PHNT@ZIF-8 adsorbs CO 2 primarily through van der Waals forces, which involve low energy and are easily reversible. After eight adsorption–desorption cycles, CO 2 capacity retention rate remains as high as 93% (1.37 mmol/g). This work enriches the repertoire of solid CO 2 composite adsorbents, providing a novel pathway for enhancing CO 2 adsorption performance.
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Journal of Materials Chemistry A
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2024
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IF 10.7
Jie Yin,Sizhe Li,Hao Zhang,Yao Lu,Yan Zhao,Kai A. I. Zhang
Conjugated polymers (CPs) have garnered attention for their tailorable structure properties, particularly in the context of efficient photosynthetic hydrogen peroxide (H2O2) production. However, the challenge lies in the precise molecular engineering of CPs to facilitate differing reaction pathways, thereby enhancing H2O2 photogeneration efficiency. In this study, we developed dual-chain CPs (DC-CPs) with a distinctive architecture, employing the supramolecular host cucurbit[8]uril as a "molecular lock" to conjoin two polymer chains. The dual-chain configuration is designed to harbour a central reaction centre conducive to oxygen reduction, providing dual conduction pathways for reactant molecules. The existence of this central reaction center was confirmed through the in-situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy measurements and density functional theory (DFT) calculations. In addition, femtosecond transient absorption (fs-TAS), variable temperature fluorescence spectroscopy and time-resolved photoluminescence (TRPL) measurements reveal double-stranded structures favourable for carrier transport and reactive site activation between dual polymer chains. Ultimately, DC-CPs demonstrate up to a threefold increase in H₂O₂ production compared to their respective single-chain CPs (SC-CPs). This work adds significantly to the application of CPs for efficient H2O2 photogeneration through molecular engineering strategy.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Xinyu Li,Shijie Li,Yunpeng Ren,Yifei Yang,Yisong Yu,Jin Zhang,Jianguo Zhao
Metal-organic frameworks (MOFs) derived porous carbons have been demonstrated to have dramatic performance in CO 2 adsorption. Herein, ZIF-8 was initially synthesized in the pores of Chinese white poplar to prepare composites, and then the composites were carbonized into ZIF-8@Poplar porous carbon for CO 2 uptake. The structure and physical-chemical properties of the prepared material were investigated. The results showed that when the molar ratio of metal clusters to organic ligands was 1:4, the synthesized ZIF-8 had small particle size around 150–200 nm and was resistant to 973 K, this confirmed the feasibility for composite of ZIF-8@wood. ZIF-8 was successfully synthesized in situ inside of wood, it suspected combining with wood through hydrogen bonding and electrostatic interactions, and its content in wood was 12.76 %. The prepared ZIF-8@Poplar porous carbon was an amorphous carbon with BET surface area of 233.772 m 2 /g, pore volume of 0.177 cm 3 /g and the average pore size of 3.024 nm. It had CO 2 capacity of 1.33 mmol/g at 298 K at 1 bar with lower N content (based on XPS patterns), the CO 2 adsorption was conducted from its abundant micropores, which is corroborated by the heat of CO 2 adsorption (34.53 kJ/mol) calculated based on Clausius-Clapeyron equation. Based on Ideal Adsorbed Solution Theory (IAST), it has a good adsorption selectivity of CO 2 over N 2 on a gas mixture containing 10 % CO 2 and 90 % N 2 . In summary, in situ synthesis and co-carbonization provide a strategy for the synthesis of MOFs@wood-derived hard porous carbon for superior CO 2 uptake in industrial applications.
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Heliyon
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2024
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IF 3.4
Haoruo Jia,Ziyuan Zheng,Jining Qu,Hongtao Yu,Zhoujun Zhu,Qingda Lu,Fei Su,Yating Yang,Tongtong Feng,Qiang Jie
Although Zeolitic Imidazolate Framework-8 (ZIF-8) shows significant promise in chemodynamic therapy of bacterial infections due to its large specific surface area and enzyme-like activity, it still faces a considerable gap compared to natural enzymes. The dependency on low pH and high concentrations of hydrogen peroxide ((H 2 O 2 ) is a major factor limiting the clinical progress of nanozymes. Single-atom nanozymes (SA-zyme), which exhibit superior catalytic performance, are expected to overcome this limitation. In this study, we used ZIF-8 as a template to prepare structurally regular molybdenum-based single-atom nanozymes (Mo-zyme) by coordinating molybdenum atoms with nitrogen atoms within the zeolitic imidazolate framework and evaporating the zinc element at high temperatures. The cascade catalytic performance of the nanodrugs was enhanced by loading glucose oxidase (GOx) and encapsulating it with a hyaluronic acid (HA) layer to form a composite (Mo/GOx@HA). Upon contact with hyaluronidase from bacteria in infected tissues, the cascade reaction is triggered, resulting in the degradation of the HA shell, and releasing the encapsulated GOx. Once exposed, GOx catalyzes the oxidation of glucose into gluconic acid, resulting in a localized decrease in pH and continuous production of H 2 O 2 . The combination of lowered pH and increased H 2 O 2 concentration significantly amplifies the catalytic activity of the Mo-zyme. This enhanced activity facilitates the in situ generation of hydroxyl radicals (•OH) on the bacterial surface, leading to effective and efficient bacterial eradication. Wound infection treatment has demonstrated that the as-prepared Mo/GOx@HA exhibits excellent antibacterial and anti-inflammatory activity. This work provided a promising enzymatic cascade reaction nanoplatform for the treatment of bacteria infected wounds.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Wenfan Yu,Zhenxuan Liang,Shaoyu Luo,Qian Yan,Yi Sun,Yisheng Zhu,Shifeng Zhang
Metal-organic frameworks (MOFs) are highly advantageous due to their tunable pore size, exceptional thermal and chemical stability, and high specific surface area, making them ideal for applications in formaldehyde adsorption. However, the practical use of powdered MOFs is significantly hindered by their recycling challenges. In this research, wood-based composite aerogels (WAZN-X) were successfully prepared through loading Zeolitic Imidazolate Framework-8-NH 2 (ZIF-8-NH 2 ) inside wood aerogels. Ascribing to the elimination of lignin and hemicellulose, the enlarged pore structures of wood aerogels and the potential interactions (e.g., hydrogen bonding and electrostatic attractions) between components promoted the uniformly depositing of ZIF-8-NH 2 nanocrystals. The WAZN-X aerogels displayed excellent mechanical strength (e.g., the longitudinal Young’s modulus of 68.57 MPa) and promising formaldehyde adsorption performance (e.g., a stable formaldehyde removal rate of 98.11 %), and kept commendable reusability (95.98 % after 5 cycles). This research provides a new insight for developing high-value functional composite adsorbents for efficient formaldehyde purification.
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CARBON
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2025
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IF 11.6
Jiaxi Shu,Yechen si,Xiaolong Ma,Wenli Lei,Yuanmeng Zhao,Changsheng Shan
Multi-component alloys have been considered as alternative anode materials for lithium-ion batteries (LIBs) due to their much higher capacity than graphite. However, the alloys still suffer from large volume expansion, leading to fast capacity decay. Here, high entropy metal sulfide/carbon nanocomposites ((FeCoNiCuZn)S x /C) were fabricated by the calcination of FeCoNiCuZn high-entropy alloy/ZIF-8 nanocomposites. As an anode for LIBs, the (FeCoNiCuZn)S x /C exhibited superior reversible capacity of 809.5 mAh g -1 with high coulombic efficiency of 99.6% at high current density of 500 mA g -1 after 200 cycles and high rate capacity (up to 1150.2 mAh g -1 and 604.4 mAh g -1 at 0.2 A g -1 and 3 A g -1 , respectively), showing much better performance than (FeCoNiCuZn)S x without ZIF-8 derived carbon. The experimental results show that the excellent electrochemical performance of (FeCoNiCuZn)S x /C is mainly attributed to the presence of ZIF-8 derived conductive carbon skeleton, which enhanced greatly structural stability and electron transfer ability of (FeCoNiCuZn)S x .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Peiwen Wang,Congjin Chen,Yingjie Li,Jinrou Wei,Zuqiang Huang
Lignin, as a by-product produced in the biological refining and papermaking processes, is often discarded or burned, resulting in environmental pollution and resource waste. Herein, a novel environmental-friendly ternary hybrid foams adsorbent (SLS/PEI/ZIF-8) was designed for effectively removal TC from aqueous solution. The adsorption properties of the adsorbent were systematically studied. The results show that the adsorption process for TC were fitted well by the pseudo-second-order kinetics model and the Langmuir isotherm model, respectively. The maximum Langmuir monolayer adsorption capacity of SLS/PEI/ZIF-8 for TC was calculated as 1098 mg/g at 30 °C, which was superior to most reported adsorbents. Thermodynamic analysis indicated the adsorption process for TC was spontaneous and endothermic. Moreover, the electrostatic interactions, hydrogen bonding interactions and π–π interactions were proposed as the possible adsorption mechanism. The adsorbent still maintained superior adsorption capacity for TC in ions solution, HA solution and actual water samples, and had good reusability. Therefore, it is a promising adsorbent for the removal of TC from wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Shilin Chen,Zhikang Li,Dongjie Yang,Xueqing Qiu,Dafeng Zheng,Weifeng Liu
The alarming overuse of antibiotics poses a serious threat to the environmental security. Herein, a hybrid aerogel adsorbent, sodium lignosulfonate functionalized polyethyleneimine/carboxymethyl chitosan@ZIF-8 (CCSL@ZIF-8), was fabricated by introducing sodium lignosulfonate into polyethyleneimine/carboxymethyl chitosan (CSSL) and then in situ uniformly anchoring of ZIF-8 on CSSL aerogel. The incorporation of sodium lignosulfonate not only enhanced the mechanical properties of CCSL , but also provided a large number of chelating sites for Zn 2+ and promoted the formation of ZIF-8. The sorption behavior and mechanism were studied by batch adsorption experiments and characterization analysis. The experimental results demonstrated that the maximum adsorption capacity of CCSL-1.0@ZIF-8 was 231.36 mg/g with a tetracycline (TC) concentration of 200 mg/L at 303 K, which was 7 times higher than that of CCSL-1.0 (30.73 mg/g). The absorption process followed the pseudo-second-order kinetic model and Freundlich isothermal model, and the process of adsorbing TC was dominated by multilayer chemisorption. The adsorption mechanism included pore filling, coordination bonds, hydrogen bonding, electrostatic interactions and π-π interactions. Moreover, the removal efficiency of TC by CCSL-1.0@ZIF-8 was maintained above 78 % after 6 cycles. Overall, this work presents a potential bio-based adsorbent for the effective removal of tetracycline from wastewater and provides a novel, facile, and green chemical technique for high-value utilization of lignin. Furthermore, the prepared biomass-based hybrid adsorbent has outstanding reusability and water stability, which has broad practical application prospects in antibiotic wastewater treatment.
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