SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Li Zhao,Ruiying Zhu,Hong Ma,Xiaofang Pan,Xuan Luo,Xiaobo Gong
Efficient electrochemical advanced oxidation processes (EAOPs) based on carbon catalysts are highly promising candidates for green environmental remediation technologies. Wood derived N-doped porous carbon (WNPC) was prepared the balsa wood with in-situ growth of zeolitic imidazolate framework-8 (ZIF-8) was used as precursor. WNPC acted as self-supporting electric Fenton cathode with high yield and selectivity (96 %) of in-situ H 2 O 2 generation, which effectively avoided the use binder for powder material. Owing to abundant N-doping and oxygen functional groups, the H 2 O 2 yield of WNPC was three times that of balsa wood derived carbon (WC) in electro-Fenton system. The graphite-N promoted the electron transfer, while the pyridinic-N could enhance the selectivity of the 2e-ORR for H 2 O 2 generation. Furthermore, the specific surface area of WNPC was 10 times of WC, with improved hydrophilicity and accelerated electron transfer. The removal efficiency of tetracycline hydrochloride (TC) achieved 91 % within 120 min in electro-Fenton system with WNPC and Fe 2+ , which was much higher than that with WC (63 %). Free radical scavenging and electron paramagnetic resonance experiments confirmed that ·OH and O 2 – · were the main active substances for TC degradation in electro-Fenton system. In addition, WNPC has good stability, reusability, and comparable degradation performance of various organic pollutants, and also had efficient degradation performance with actual water. This research proposed a novel strategy to construct efficient electro-Fenton catalyst with wood as precursor, which provides an advancing electrocatalytic methods to achieve efficient and environmentally conscious water purification.
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Xiaoqing Gao,Shanhui Zhu,Mei Dong,Hongyan Zheng,Yanfeng Xue,Xiaojing Cui,Yulan Niu,Weibin Fan
Highly efficient synthesis of valuable γ-valerolactone (GVL) by levulinic acid (LA) hydrogenation is of interest for biomass refinery, but it suffers from great challenge to design highly active Ru-based catalyst at low temperature. ZIF-8 derived ZnO@NC nanocomposite can firmly anchor Ru nanoparticles to create strong Ru-ZnO interfacial structure, as revealed by characterization techniques and DFT calculations. By optimizing Ru content and ZnO particle size, Ru/ZnO@NC achieved excellent reaction activity with a turnover frequency (TOF) of 6032 h −1 at low temperature of 40 °C, which is never reported before. After etching the accessible ZnO, the TOF value was significantly declined to 125 h −1 on Ru/ZnO@NC-HF owing to the lack of effective Ru-ZnO interface. DFT calculation results demonstrate that the Ru-ZnO interfacial structure can facilitate the activation of intermediate CH 3 CHOCH 2 CH 2 COOH* and remarkably decline the activation energy barrier of rate-determining step (CH 3 CHOCH 2 CH 2 COOH + H = HPA) from 1.28 eV to 0.82 eV, thus leading to excellent activity of LA hydrogenation at low temperature.
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 7
·2647-2659
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IF 2.2
Zhou Jianhua,Li Sitong,Niu Zhuanli
Combining phase change materials with textile materials is an important method to give textiles temperature regulation function. Herein, the microcapsulated phase change materials with ZnO@ZIF-8@SiO 2 -doped polymethyl methacrylate (PMMA) as hybrid shell (ZZS/PMMA MPCMs) were prepared through Pickering emulsion polymerization with n-octadecane (C18) as core and ZnO@ZIF-8@SiO 2 grafted with polyacrylic acid (MZZS) particles possessing radiation cooling performance as stabilizers. The effect of MZZS content on the morphology of phase change microcapsule, radiation cooling and temperature regulation properties of coated cotton fabrics was studied. The results indicated that when the MZZS content increased to 3.0 wt%, the prepared phase change microcapsule’s encapsulation efficiency was 50.34%, showing excellent latent heat storage and release properties. Furthermore, compared with the uncoated cotton fabric, the rising and dropping rate of the temperature of ZZS/PMMA MPCMs coated cotton fabric was much slower in different seasons, indicating excellent radiation cooling and temperature regulation performance.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
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IF 4.8
Changfeng Zeng,Jie Li,Jie Gong,Lixiong Zhang,Liang Yu
ZIF-8/PVA microspheres with an even size were synthesized with the assistance of a simple microfluidic device. The ZIF-8/PVA microdroplets were first generated in a simple co-flow microfluidic device using a PVA aqueous solution dispersed with ZIF-8 nanoparticles as the dispersed phase and fatty acid methyl ester (FAME) as the continuous phase. Subsequently, the ZIF-8/PVA microdroplets were further extracted to form ZIF-8/PVA microspheres. The influence of the type of continuous phase on the sphericity of microspheres was investigated and the effect of ZIF-8 content was studied. Further studies showed that decreasing the extraction rate and using additives of NaCl in the dispersed phase could improve the sphericity of the ZIF-8/PVA microspheres. Finally, the synthesized ZIF-8/PVA microspheres were used to study the loading and release of tetracycline. The results showed that the loading of ZIF-8/PVA microspheres was more than 5 times higher than that of pure PVA microspheres. The drug release time of ZIF-8/PVA microspheres was much longer than that of the PVA microspheres and the release rate was significantly affected by the pH of the environment.
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Food Packaging and Shelf Life
·
2025
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IF 10.6
Xin Ding,Yiming Zhao,Xin Chen,Yanyan Huang,Zhihao Lin,Jing Wang,Ge Chen,Guangyang Liu,Xiaomin Xu,Bining Jiao,Xijuan Zhao,Donghui Xu
Chitosan film is frequently used to preserve food. However, the stability of chitosan film is poor, so it is crucial to strengthen the stability, anti-ultraviolet, antibacterial activity, anti-oxidation and continuous fresh-keeping activity of chitosan film. In this work, paeonol@ZIF-8 and Ag 2 CO 3 /Ag 2 O nano-heterojunctions were dispersed into chitosan/kudzu-based solution by matrix mixing and solution casting method, which successfully prepared a biodegradable nanocomposite film and used it for preservation of raspberry. Moreover, ZIF-8 provided a large number of active sites to PAE. The loading rate of PAE@ZIF-8 was 36.33 ± 0.82 % by a simple one-pot process. The paeonol@ZIF-8 had the effect of slow release in different food environments and intelligent response to pH. The Ag 2 CO 3 /Ag 2 O nano-heterojunctions also cooperated to inhibit bacteria by releasing silver ions. Meanwhile, the physical and chemical properties of chitosan film were improved, which could make it more suitable for food packaging. The improved film could block 90.32 % of UV–visible light. Moreover, its antioxidant and antibacterial properties were increased by 1.24 times and 4 times, respectively. It could extend the shelf life of raspberries to 5 days as the hydrophobic film. The nanocomposite film also effectively maintained cucumber slice quality. It also found that the migrating silver ion content of raspberry and cucumber slice complied with EU food safety law regulations. Importantly, the nanocomposite film was degradable and did not affect the germination and growth of the seed. Our work provides a sustainable multifunctional food packaging material that can be used to preserve perishable foods.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Yingli Guo,Zhixiong Zheng,Bingyu Fu,Shengxin Wen,Yu Zhou,Xingping Zhang,Hualin Yang
Ochratoxin A (OTA) as a mycotoxin has strong carcinogenicity and can affect human health. Thus, it is necessary to establish an accurate method to detect OTA. Herein, a ratiometric absorbance and fluorescence dual model immunoassay based on ZIF-8@uranine (ZIF-8@UR) and p -nitrophenol (PNP) was developed. In this new immunoassay, alkaline phosphatase-labeled secondary antibodies (IgG-ALP) were used to associate OTA with signal output. The IgG-ALP can hydrolyze 4-nitrophenyl phosphate salt (PNPP) to generate yellow PNP and phosphate (Pi). Then, the Pi triggered the decomposition of ZIF-8@UR to release UR with a fluorescence signal. The absorbance ratio of PNP and UR was taken as a ratiometric absorbance signal. The ratiometric absorbance and fluorescence modes exhibited linear ranges of 0.781–50.0 ng/mL and 1.563–100.0 ng/mL, with limits of detection (LODs) of 0.112 ng/mL and 0.147 ng/mL, respectively. Meanwhile, the new immunoassay showed high specificity for OTA and satisfactory recovery rate in actual samples.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jialiang Pan,Chenhong Liu,Zhiqiang Wang,Wenbo Shi,Tianhao Zhao,Qingcong Wei,Qing Zhang,Zhengyu Bai
The hyperglycemic microenvironment of diabetic chronic wounds is a major driver of severe bacterial infections, excessive inflammatory responses, and impaired angiogenesis, all of which delay wound healing. To address these challenges, we prepared a glucose oxidase (GOx)–loaded zeolitic imidazolate framework-8 (GOx@ZIF-8). Furthermore, a multifunctional hydrogel (AACZ) was fabricated by incorporating 5-methylfurfural– and L-arginine–grafted alginate and maleimide–grafted chondroitin sulfate with GOx@ZIF-8 through the Diels–Alder reaction. Results showed that immobilized GOx remained active for a longer time than of free GOx. At the wound site, GOx catalyzed the conversion of excess glucose to gluconic acid and hydrogen peroxide (H 2 O 2 ). The reduced pH in the local region induced Zn 2+ release from zeolitic imidazolate framework-8, simultaneously, H 2 O 2 mediated the generation of nitric oxide (NO) from L-arginine. The synergy between Zn 2+ and NO endowed AACZ with excellent antibacterial properties. The biocompatible hydrogel promoted cell proliferation and migration, regulated local blood glucose levels, inhibited bacterial activity, alleviated inflammation and promoted angiogenesis and collagen deposition at the diabetic wound site. These findings suggest that AACZ holds promise as a responsive dressing material in healing for complex wounds.
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ANALYTICAL LETTERS
·
2025
·
IF 1.8
Jintao Yi,Nani Fu,Anqi Li,Ping Yan,Hui Pan,Xiulong Deng,Jun Xue,Xun Li
Flumequine, a quinolone antibacterial drug, has been widely used in aquiculture. However, excess use of flumequine may lead to antibiotic residues in animals and its rapid determination remains a challenge. In this study, a visual lanthanide metal–organic frame probe of Trp@ZIF-8/Tb3+ was used for the determination of flumequine. The probe was stepwise synthetized by tryptophan (Trp), zeolitic imidazolate framework-8 (ZIF-8), and terbium (III). In the presence of flumequine, the fluorescence of Tb3+ in Trp@ZIF-8/Tb3+ was sensitized. The fluorescence method was fast, requiring only 40 s, the detection range was wide from 0.03 to 1.53 μM, and the detection limit was 0.018 μM. Moreover, the Trp@ZIF-8/Tb3+ probe had good specificity and strong anti-interference ability, which was used for flumequine determination in milk, tap water, and serum. Furthermore, the Trp@ZIF-8/Tb3+ probe provided a method for the rapid determination of flumequine on test strips: The color changed from blue to green with increasing concentration. Hence, the developed Trp@ZIF-8/Tb3+ probe offers an efficient and convenient method for flumequine determination.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yue Hu,Lijiu Cao,Yunpeng Gong,Xu Ma,Yufang Chen,Tao Jin
Formaldehyde sensors represent an effective technology for real-time, online monitoring of formaldehyde concentrations. The selectivity of gas-sensitive materials for formaldehyde is a fundamental determinant of sensor performance and is crucial for the development of formaldehyde sensing technology. In this work, Sn-doped Zn-MOFs were employed to fabricate SnO 2 /ZnO micro-nano materials, and their selective response behaviors to formaldehyde were systematically explored. The results demonstrate that 5 % SnO 2 /ZnO, prepared with 5 % Sn doping, exhibits exceptional selectivity for formaldehyde. Under testing conditions of 170 °C and relative humidity below 60 %, the 5 % SnO 2 /ZnO sensor achieved a selectivity coefficient of 0.87 toward 50 ppm formaldehyde, with a response value of 72.8, response and recovery times of 81/30 s, a linear regression coefficient of 0.9997, and a minimum detection limit of 0.047 ppm. Moreover, the 5 % SnO 2 /ZnO sensor demonstrates excellent selectivity, anti-interference capability, and stability for formaldehyde detection. The enhanced formaldehyde selectivity is attributed to the high specific surface area, abundant pore structure, abundant oxygen vacancies, and n–n heterojunctions present in the 5 % SnO 2 /ZnO composite.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Shenglong Chen,Qiang Zhou,Xiaojing Liu,Hongyan Guan,Peng Dong,Hongman Hou,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongshun Hao
In this study, a novel Z-scheme ZnO-AgCl-Ag photocatalyst was prepared by converting the metal-organic framework ZIF-8 to ZnO via a simple pyrolysis method and using a physical wet mixing method. The crystal structure, microstructure, elemental distribution, and photoelectrochemical properties of the catalyst were systematically characterized using various analytical techniques. The characterization results showed that the introduction of AgCl/Ag into ZnO exhibited a higher light absorption capacity as well as a lower transmission resistance. Photocatalytic degradation experiments showed that the ZA-3 sample achieved a 99.97 % degradation rate of 10 mg/L RhB in 24 min, which was 2.3 higher than that of ZIF-8-derived ZnO. In addition, we systematically investigated the effects of initial RhB concentration, solution pH, anion interference, and catalyst recycling cycle on the photocatalytic activity, demonstrating the stability and applicability of the composites under different conditions. In addition, radical trapping experiments were conducted to probe the photocatalytic reaction mechanism, and a Z-scheme charge transfer pathway was confirmed, in which photogenerated electrons were effectively separated and transferred at the Z-scheme heterojunction interface through the conductive channel of Ag nanoparticles as carriers, which significantly improved the photocatalytic activity. In this study, the advantages of MOFS were rationally and effectively utilized to design and prepare Z-scheme photocatalysts with UV–visible response.
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Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Xiping Jiang,Hui Xu,Xinyue Sun,Xuefan Yang,Yuxuan Xia,Wen Xue,Yaohua He
Introduction: The high rate of retear following rotator cuff repair is largely attributed to the absence of a fibrocartilage layer and limited bone regeneration capacity. We aim to evaluate a bioadhesive derived from decellularized porcine annulus fibrosus extracellular matrix, loaded with zeolitic imidazolate framework-8 (ZIF-8), and to promote rotator cuff tendon–bone healing.Methods: Three adhesive formulations were developed: (1) silk fibroin/tannic acid (ST group), (2) ST combined with decellularized porcine annulus fibrosus extracellular matrix (ST/dECM group), and (3) ST/dECM supplemented with ZIF-8 (ST/dECM/ZIF-8 group). Optimal component ratios were determined using lap shear strength testing. The microstructure, Fourier transform infrared (FTIR) spectra, swelling behavior, and degradation properties of the materials were characterized. In vitro studies assessed the adhesives’ effects on cytotoxicity, proliferation, and the chondrogenic and osteogenic differentiation of rat bone marrow-derived mesenchymal stem cells (BMSCs). A rat rotator cuff repair model was used to evaluate in vivo anti-inflammatory effects, fibrocartilage and bone regeneration, and biomechanical performance.Results: All adhesive formulations exhibited comparable tissue adhesion strength and biocompatibility. Both the ST/dECM and ST/dECM/ZIF-8 groups enhanced BMSC chondrogenic differentiation compared to the ST group, with the ST/dECM/ZIF-8 group showing superior osteogenic induction. In vivo, the ST/dECM/ZIF-8 hydrogel effectively reduced interfacial inflammation and promoted fibrocartilage and bone regeneration. Biomechanical testing demonstrated significantly higher ultimate load, tensile stress, and stiffness in all adhesive-treated groups compared to untreated controls.Conclusion: The ST/dECM/ZIF-8 bioadhesive hydrogel promotes fibrocartilage and bone regeneration. These findings highlight its potential as a promising biomaterial-based strategy to enhance tendon-to-bone interface healing following rotator cuff repair.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Bingbing Yuan,Shuang Yuan,Chaozheng Jia,Ping Hu,Siheng Zhao,Xiaozhuan Zhang,Zewen Xu,Lihong Liu,Meng You,Shengchao Zhao,Kuo Chen,Dongxiao Yang,Juhui Jiang,Xiangdong Lou,Jianxun Dong,Tatiana V. Plisko,Q.Jason Niu
To address the growing global challenge of water scarcity, developing high-performance reverse osmosis (RO) membranes for desalination and water purification is essential. However, conventional polyamide (PA) thin-film composite (TFC) membranes are limited by the trade-off between permeability and selectivity, as well as limited rejection of small-molecular contaminants. In this study, we report a novel high-permeability thin-film nanocomposite (TFN) RO membrane by tuning the hydrophilicity of a zeolitic imidazolate framework-8 (ZIF-8) interlayer to achieve synergistic enhancement in both desalination and micropollutant removal. Specifically, a ZIF-8 interlayer was in situ grown on a hyperbranched PA-UIO-66-NH 2 support, followed by partial ligand exchange with 5,6-dimethylbenzimidazole (Hdmbim) to reduce its hydrophilicity. This modification facilitated the diffusion of m-phenylenediamine (MPD) monomers, enabling the formation of a highly cross-linked PA selective layer (h-TFN) with angstrom-scale water transport channels. The optimized h-TFN membrane exhibited a water permeability of 5.40 L·m −2 ·h −1 ·bar −1 , 2.94 times that of the control TFC membrane, while maintaining high NaCl rejection (98.35 %). Moreover, it achieved 96.06 ± 0.18 % rejection for micropollutants such as heptyl paraben (HP). These results surpass the permeability–selectivity limitations of existing membranes and demonstrate a promising strategy for the design of advanced RO membranes capable of efficient desalination and micropollutant removal.
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