CHEMICAL ENGINEERING RESEARCH & DESIGN
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2024
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IF 3.7
Ayesha Komal,Amna Kasuri,Muhammad Yasin,Asim Laeeq Khan,Abdul Razzaq,Hamad Alhmohamadi,Faheem Hassan Akhtar,Arsalan Ahmad Raja,R. Nawaz,Emilia Abdulmalek,Mazhar Amjad Gilani
Separating butanol/water mixtures via distillation is notably energy-intensive and costly, highlighting the urgent need for more efficient alternatives. This study introduces a novel approach using mixed matrix membranes (MMMs) infused with Zeolitic Imidazolate Framework-8 (ZIF-8) transformed into its porous liquid (PL) form, aimed at enhancing the separation efficiency of butanol/water mixtures through pervaporation (PV). We selected ZIF-8 for its hydrophobic nature and high surface area, which are critical for improving both flux and selectivity in membrane-based separation processes. The study details the synthesis of ZIF-8-PL, its characterization through techniques such as Fourier Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM), and the fabrication of the MMMs. Our results demonstrate that ZIF-8-PL-based membranes at 55°C with a 30 wt% PL loading significantly enhance biobutanol-selective PV efficiency. Specifically, these membranes show an improvement in flux of approximately 102% and an increase in separation factor by 64% when compared to unmodified polydimethylsiloxane (PDMS) membranes. This significant enhancement highlights the effectiveness of PL-based fillers in advancing MMM performance for biofuel separation, providing a promising route to optimize energy efficiency and cost-effectiveness in industrial scale applications.
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高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 2
·105
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IF 4.3
Jiuyu Chen,Chensheng Gao,Jingwen Chen,Fei Liu,Zhiwen Liu
The development of copper-based materials with a high efficiency and low cost is desirable for use in iodine (I2) remediation. Herein, Cu0-nanoparticles-functionalized, ZIF-8 (Zeolite Imidazole Framework-8)-derived, nitrogen-doped carbon composites (Cu@Zn-NC) were synthesized by ball milling and pyrolysis processes. The as-prepared composites were characterized using SEM, BET, XRD, XPS, and FT-IR analyses. The results showed that the morphology of ZIF-8 changed from a leaf-like structure into an irregular structure after the introduction of a copper salt and carbonization. The copper in the pyrolysis samples was mainly in the form of Cu0particles. The presence of an appropriate amount of Cu0particles could increase the specific surface area of Cu@Zn-NC. The subsequent batch adsorption results demonstrated that the as-fabricated composites showed high I2adsorption amounts (1204.9 mg/g) and relatively fast dynamics in an iodine–cyclohexane solution when the Cu content was 30% and the pyrolysis temperature was 600 °C, outperforming the other Cu-based materials. The isothermal adsorption followed both Langmuir and Dubinin–Radushkevich isotherm models, while the kinetics of I2adsorption followed a pseudo-second-order kinetic model. The activation energy (Eα) of the adsorbent was determined to be 47.2 kJ/mol, according to the Arrhenius equation. According to the experimental and DFT analyses, I2-Zn interactions and I2-Cu0chemisorption jointly promoted the elimination of iodine. In general, this study provided an operative adsorbent for the highly effective capture of iodine in solution, which might be worth applying on a large scale.
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ACS Omega
·
2024
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IF 3.7
Qi Tao,Hang Yao,Feifei Wang,Zehao Gu,Xiaofei Yang,Yuchi Zhao,Huan Pang,Dong-An Wang,Hui Chong
Ulcerative colitis (UC) is a chronic inflammatory bowel disease characterized by the disruption of the intestinal epithelial barrier. This study described the synthesis and characterization of CCM-Co-ZIF-8, a novel composite material with enzyme-like activities similar to catalase, peroxidase, and superoxide dismutase. CCM-Co-ZIF-8 demonstrated the ability to scavenge reactive oxygen species that play a critical role in UC pathogenesis. In vitro studies using lipopolysaccharide-induced RAW264.7 cells showed that CCM-Co-ZIF-8 exhibited anti-inflammatory activity by promoting the transition of macrophages from an M1 to an M2 phenotype. In vivo experiments using a mouse model of UC demonstrated that CCM-Co-ZIF-8 suppressed the expression of proinflammatory cytokines. These findings suggested that CCM-Co-ZIF-8 might hold promise as a therapeutic strategy for the treatment of UC.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Zihao Li,Zuozhu Yin,Wenbo Xiao,Yuhua Chen,Chenggang Yang,Yidan Luo,Zhen Hong,Mingshan Xue
Given the increasing contamination of freshwater supplies, it is essential to effectively treat industrial wastewater. However, treating industrial wastewater using a single method is challenging due to the presence of complex contaminants like petroleum, organic dyes, bacteria, and other complex contaminants. In this study, we present a straightforward and scalable approach to prepare multifunctional nanocellulose-based membranes (NM) that exhibit superhydrophobicity, self-cleaning, oil/water separation, photocatalysis, and anti-bioadhesion properties. To begin with, we created NM by extruding fiber slurry onto a stencil and drying it. Next, we built a polyurethane (PU)/ZIF‐8/1H, 1H, 2H, 2H‐perfluorooctyltriethoxysilane (POTS)-based superhydrophobic layer by spraying it over the NM's surface. By employing the aforementioned processes, we successfully integrated multiple functions into a single superhydrophobic NM. Our results demonstrate that the NM-PU/ZIF-8/POTS membrane exhibits superior hydrophobicity performance, with a high-water contact angle (166.8 ± 0.8°) and a low rolling angle (5 ± 0.3°). Moreover, these samples retain high-water contact angles and low rolling angles even in harsh environments such as acid and alkali solutions, high temperatures, abrasion resistance, UV aging resistance, bending and folding, tape peeling, and self-cleaning. The NM-PU/ZIF-8/POTS membrane also exhibits high and stable oil-water separation performance, with a separation efficiency of 94.6% and a relatively high separation flux (133.2 L·m −2 ·h −1 ). At the same time, the NM-PU/ZIF-8/POTS membrane exhibits water-in-oil emulsion separation ability. The membrane’s stability, effectiveness, and reusability were demonstrated through ten repetitions of degradation experiments using aqueous methylene blue solution, with the NM-PU/ZIF-8/POTS membrane exhibiting an excellent degradation rate (>94%). Finally, the bioadhesion resistance test indicated a reduction of 69.1% in the adhesion rate of the NM-PU/ZIF-8/POTS membrane. Overall, the creation of the NM-PU/ZIF-8/POTS membrane serves as a useful inspiration for the practical application of superhydrophobic NM in multifunctional integration, while also broadening the scope of membrane applications.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Bolong Liang,Xiaoyu Huang,Xi Zhu,Hongbin He,Shu-xuan Liang
Ciprofloxacin accumulates in aqueous environment due to its non-degradability. Photocatalysis, as an economical and efficient treatment technology for organic matter, is mostly used to remove antibiotics from water environment. However, the photocatalytic performance is limited by photocatalysts, which suffer from wide band gap and severe recombination of photogenerated electrons and holes. Therefore, we developed a Z-scheme heterojunction photocatalyst Fe-ZIF-8@AgCl, which was synthesized by combining pre-prepared Fe-ZIF-8 with AgCl. Meanwhile, the X-ray diffractometer, scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller analysis and X-ray photoelectron spectroscopy were employed to characterize the structure of Fe-ZIF-8@AgCl, and a series of photoelectric tests were conducted to demonstrate the photocatalytic properties of Fe-ZIF-8@AgCl. The results revealed that Fe-ZIF-8@AgCl had a remarkable 71.9 % removal efficiency of ciprofloxacin by photodegradation in 120 min. Fe-ZIF-8@AgCl could help reduce band gap energy, inhibit the recombination of photoelectrons and holes, lower the charge transfer resistance, and enhance the photocurrent response. Furthermore, Fe-ZIF-8@AgCl still maintained a high photocatalytic performance after 4 cycles, and ·O 2 - was detected and identified as the main photocatalytic active factor. Subsequently, the charge transfer mechanism of direct Z-scheme heterojunction was proposed, and the photocatalytic degradation pathways of ciprofloxacin were analyzed. In this study, Z-scheme heterojunction photocatalyst was prepared and showed great potential for efficient photodegradation of ciprofloxacin.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xinyue Liang,Xiaolong Yao,Sijie Chen,Wei Wang,Hong Zhu,Qingwei Bu,Zheng Liu
The highly toxic and recalcitrant organic pollutant, 2,4-dichlorophenol (2,4-DCP), is commonly found in wastewater. Therefore, it is critical to investigate novel techniques for the efficient removal of 2,4-DCP from wastewater. The present study employed a one-step synthesis method to fabricate ZIF-8/multi-walled carbon nanotubes (ZIF-8/MWCNTs) nanocomposites with well-defined mesoporous structures, which were subsequently coated onto carbon cloth (CC) to form the anode ZIF-8/MWCNTs/CC. Subsequently, the adsorption performance of ZIF-8/MWCNTs toward 2,4-DCP and the adsorption-electrochemical degradation performance of ZIF-8/MWCNTs/CC toward 2,4-DCP were investigated. ZIF-8/MWCNTs exhibit exceptional adsorption capacity and rate toward the 2,4-DCP. At 303 K, it achieved a saturated adsorption amount as high as 1056.78 mg·g - 1 within only 30 min of reaching equilibrium. Moreover, when coated on CC substrates, the internal pore structure of ZIF-8/MWCNTs is effectively exploited during the adsorption. In addition, the incorporation of MWCNTs enhances the conductivity of the ZIF-8/MWCNTs/CC electrodes, leading to reduced resistance and improved electron transfer rate. Notably, ZIF-8/MWCNTs/CC enabled complete removal of a 25 mg·L -1 solution of 2,4-DCP within only 90 min and a 50 mg·L -1 solution within 120 min. Furthermore, the degradation mechanism of 2,4-DCP was analyzed by means of DFT modeling theoretical calculations and intermediate product determination analysis, while evaluating the toxicity of the generated material was evaluated. This study provides improved solutions and strategies for the treatment of chlorophenolic compound pollution in wastewater.
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Heliyon
·
2024
·
IF 3.4
Linlin Ding,Hao Chen,Guoli Bi,Wenqi Wang,Rui Li
Luteolin, a naturally occurring pharmaceutical compound with significant antitumor properties, faces challenges in clinical applications due to its low solubility in water and limited bioavailability. To address these issues, a one-step synthesis method was employed to encapsulate luteolin within ZIF-8. The successful preparation of luteolin@ ZIF-8 nanoparticles was confirmed through various analytical techniques, including fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), laser size distribution analysis, X-ray diffraction (XRD), and release curve assessment. Results indicate that the formulated luteolin@ ZIF-8 nanoparticles exhibited high drug loading (1360 mg/g) and demonstrated selective drug release in acidic microenvironments. Furthermore, the encapsulation of luteolin increased the size of ZIF-8 from 168.4 ± 0.2 nm to 384.7 ± 1.4 nm, but did not change its crystalline structure significantly. Notably, the results of in vitro anti-cervical and prostate cancers experiments revealed that luteolin@ ZIF-8 had better efficacy in inhibiting the proliferation and migration of HeLa and PC3 cells than free luteolin. The antitumor activity of luteolin@ ZIF-8 was sustained for 72 h, with a particularly pronounced inhibitory effect on HeLa cells as compared to PC3 cells. This study underscores the effective enhancement of luteolin's antitumor activity through encapsulation in ZIF-8, offering substantial implications for improving its clinical applications.
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THERMOCHIMICA ACTA
·
2024
·
IF 3.1
Shuhang Li,Xianglin Liao,Zhinan Zhang,Xue Chen,Luobiao Hong,Cong Liu,Suilian Luo,Qiong Hou,Yuhai Wang,Guang Shi
The thermal stability of zeolitic imidazolate framework-8 (ZIF-8) for poly(vinyl chloride) (PVC) has received attention, but its thermal stabilization mechanism needs further clarification. Herein, the stearic acid-modified ZIF-8 with high specific surface area and large pore volume was effectively synthesized by using zinc stearate as the zinc source for the first time. Modification of stearic acid results in larger adsorption capacity of ZIF-8 for HCl and better thermal stability effect for PVC, especially long-term thermal stability. Moreover, the thermal stability mechanism of ZIF-8 for PVC was demonstrated by experiments and theoretical calculations. In addition to absorbing HCl to eliminate autocatalytic degradation of PVC, ZIF-8 disintegrates and may form 2-methylimidazole-Zn-Cl salt complex instead of free ZnCl2, avoiding the negative zinc burning effect. Furthermore, the Diels-Alder reaction between imidazole ring and degraded PVC prevents the extension of the conjugated double bonds of PVC and delays the deepening of the color of PVC.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xinyuan Yan,Juan Chai,Luohao Yuan,Hongfeng Yin
Glutathione (GSH), as an significant intracellular antioxidant, plays a vital role in preserving the balance of cellular redox homeostasis. The accurate and sensitive detection of GSH is essential for understanding the cellular redox status and for the diagnosis and treatment of many diseases. Herein, a core–shell structure composed of glucose oxidase (GOx), platinum (Pt) nanoparticles and a zeolitic imidazolate framework (ZIF-8) shell was constructed. Pt NPs in the core–shell showed high peroxidase-like catalytic activity. The as-prepared Pt-GOx@H-ZIF-8 can be utilized for colorimetric detection of GSH, exhibiting a broad linear range from 0.5 to 90 μM, and a low limit of detection (LOD) of 0.4 μM. Pt-GOx@H-ZIF-8 showed excellent sensitivity, selectivity and stability towards glutathione detection, making it a promising candidate for intracellular antioxidants.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xu-Wei Luo,Ming-Ran Zhou,Mao-Jin Ran,Dao-Xiang Xun,Jia-Le He,Zhi-Yi Hu,Hemdan S.H. Mohamed,Jing Liu,Li-Hua Chen,Yu Li,Bao-Lian Su
Lithium-selenium (Li-Se) batteries have attracted increasing attention because of excellent carbonate electrolyte compatibility, comparable theoretical volumetric specific capacity and high electrical conductivity. However, there are still unavoidable issues such as large volume expansion, rapid capacity decay and slow electrochemical reaction kinetics for practical applications. In this work, we report 2D ZIF-8 derived N-doped porous carbon nanosheets (NPC-NS) as Se host for high-performance Li-Se batteries. The unique 2D structure of Se@NPC-NS facilitates Li + diffusion and charge transfer, thus the Se@NPC-NS cathode exhibits fast electrochemical reaction kinetics. In addition, the N doping enhances electronic conductivity and porous structure mitigates the volume expansion. As a result, the Se@NPC-NS cathode delivers a high reversible capacity of 585 mAh/g with a capacity retention of 99.1 % at 0.5C (1C = 675 mA g −1 ) after 225 cycles. Especially after 500 cycles at a high current density of 10C, the Se@NPC-NS cathode still displays a reversible specific capacity of 307 mAh/g with only 0.03 % capacity decay per cycle. This work would shed some light on the 2D carbon host as Se-based cathode for high-rate and long-life performance Li-Se batteries.
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Kun Zhao,Hongtao Wang,Yanqun Shao,Zhiguang Yang,Zhe Chen,Kongfa Chen,Yunxiang Chen,Deyuan Lin
Phosphates are a kind of promising electrode materials because they can provide numerous cavities and several reaction sites to be favored for storing anions and cations. However, the widespread application of phosphates are limited by their intrinsically low electronic conductivity. RuO 2 /hydrated RuO 2 exhibits high conductivity and excellent electrochemical properties. Reducing its dosage and increasing its specific surface area are the research concerns. Combining less RuO 2 to Nickel phosphate (NiP) is expected to improve the electrochemical performance. RuO 2 -modified NiP (NiP-RuO 2 ) electrode material is synthesized by a one-step hydrothermal reaction and its structural morphology and capacitive properties are investigated. The results indicate that NiP-RuO 2 electrode consists of hydrated RuO 2 and Ni 11 (HPO 3 ) 8 (OH) 6 , and exhibits excellent battery-type electrochemical supercapacitor performance with a specific capacity of 878.06 C/g at 1 A/g. According to density functional theory (DFT) analysis, Ru-doped Ni 11 (HPO 3 ) 8 (OH) 6 has a narrower forbidden band width and higher conductivity than Ni 11 (HPO 3 ) 8 (OH) 6 . Furthermore, the asymmetric supercapacitor (ASC) assembled by NiP-RuO 2 /NF and activated carbon (AC) electrode achieves a high energy density (43.58 Wh/kg) at a power density of 923.47 W/kg. When two ASC devices are connected in series, ten light-emitting diodes (LEDs) can be illuminated for ten minutes.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Guozhen Li,Shiqi Ling,Yuhui Cui,Shilong Dong,Tianyin Liu,Ting Li,Siyu Pang,Peiyong Qin
Zeolitic imidazolate framework-8 (ZIF-8) is a typical filler used to fabricate mixed matrix membranes (MMMs) on account of its attractive advantage of high selective permeability for gas separation. However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, However, the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers, which will lead to a decrease of selectivity and the performance of gas separation will be strongly influenced. Herein, we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH 2 , Kapton polyamide acid was selected as the polymer matrix. Results showed that the ZIF-8-NH 2 /Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging, even the filler loading up to 45% (mass). The 45% (mass) of ZIF-8-NH 2 /Kapton membrane showed 297 barrer (1 barrer = 10 −10 cm 3 ·cm·cm −2 ·s –1 ·cmHg –1 , 1 cmHg = 1333.22 Pa, standard temperature and pressure) of the permeability of H 2 and 43.9 and 62.2 of selectivities for H 2 /N 2 and for H 2 /CH 4 , respectively, which are beyond the upper limit of Robeson 2008.
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危险品化学品经营许可证（带存储）