Journal of Water Process Engineering
·
2022
·
IF 7.34
Qiushi Jiang,Zhaolian Han,Yinjie Qian,Yafeng Yuan,Yating Ren,Mingyu Wang,Zhiqiang Cheng
A novel strategy for the preparation of heterojunction derivants by regulating the loading of precursors was proposed and applied for the first time to effectively remove dyes and antibiotics. Zeolite imidazole framework-8 (ZIF-8)-derived ZnO/TiO 2 nano-burst-tube (NBT) was prepared by calcination of ZIF-8 as precursor grown in a solvothermal system adjusted by NH 4 OH or NaOH , TiO 2 NBT as solvothermal substrate. Through a reasonable selection of solvothermal system, ZIF-8-derived ZnO/TiO 2 NBT not only provides enhanced specific surface area (1012.3 m 2 /g), but also enhances the visible light response and charge separation of TiO 2 NBT, whose instantaneous photocurrent density is up to 53 mA cm −2 , which is three times that of TiO 2 NBT. Under visible light irradiation, ZnO/TiO 2 NBT achieved rapid degradation of Rhodamine B(RhB), tetracycline hydrochloride (TCH) and chlortetracycline hydrochloride (CTC) with complete removal within 20 min, outperforming ZnO, ZIF-8, TiO 2 NBT and ZIF-8/TiO 2 NBT, with excellent cyclic photocatalytic performance. The results show that the degradation pathways of RhB, TCH and CTC are different. The work provides a promising strategy for multifunctional derivative photocatalytic materials preparation.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·Vol. 416
·期 19
·4417-4426
·
IF 3.8
Zhu Zhentong,Wang Xiaoli,Wang Na,Zeng Chaoqin,Zhang Lei,Fan Jiamin,Yang Xin,Li Peizhe,Yuan Hongxia,Feng Yanjun,Huo Shuhui,Lu Xiaoquan
Artificial enzymes with high stability, adjustable catalytic activity, controllable preparation, and good reproducibility have been widely studied. Noble metal nanozymes, particularly gold nanoparticles (Au NPs), exhibit good catalytic activity, but their stability is poor. In this study, zeolitic imidazolate framework-8 (ZIF-8) was used as a carrier for Au NPs, thus improving the utilization efficiency and conservation stability of the nanozymes. A ZIF-8/Au nanocomposite with peroxidase activity and a raspberry-shaped structure was synthesized. In the assay, ZIF-8/Au catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue product oxidized TMB (oxTMB). Glutathione (GSH) selectively inhibited this reaction, with a detection limit of 0.28 µM and linear range of 0.5–60 µM. Using the photo and chromaticity analysis functions, we developed a portable analysis method using a smartphone equipped with a camera module as a detection terminal for a wide range of rapid screening techniques for GSH. Preparation of raspberry-shaped ZIF-8/Au improved the catalytic activity of Au NPs and good results were demonstrated in serum, which suggests their promising application under physiological conditions. Graphical Abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaochen Zhang,Fengjun Deng,Ze Liu,Yingjian Yu
Si-air batteries have a high energy density, high theoretical voltage, and long lifetime, but they present a low anode utilization rate in a potassium hydroxide electrolyte. In this work, a ZIF-8 protective layer was prepared and modulated by a secondary growth method and then applied to protect the Si flat and Si nanowire (NW) anodes of a Si-air battery. By adjusting the conversion ratio, particle size, and crystallinity of ZIF-8 on the Si surface, the contact mode of the Si anode with water and OH – was controlled, thus achieving long-term corrosion and passivation resistance. Si NWs@ZIF-8 exhibited the highest average discharge voltage of 1.16 V, and the Si flat@ZIF-8 anode achieved the longest discharge time of 420 h. This work confirms that ZIF-8 acts as an anode protective layer to improve the properties of Si-air batteries and also provides valuable insights into the protection of Si anodes by MOFs.
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FUEL PROCESSING TECHNOLOGY
·
2024
·
IF 7.2
Yan Gao,Shuhong Jia,Hongyan Zhou,Ziyun Chen,Miao Yan,Jianshe Zhao
s An efficient and sustainable catalyst is urgently needed for the actual oil refining process. Different amounts of peroxophosphotungstate (PW 4 ) were successfully encapsulated into the pore of ZIF-8 framework material to obtain composites (x%-PW 4 @ZIF-8, x = 10.7, 14.6, 27.5 and 34.8) through a stirring process at room temperature for desulfurization of model diesel. The successful encapsulation of the active component PW 4 in the pore was verified by a variety of characterization methods, and there is weak force between the PW 4 and the ZIF-8. The composite 27.5%-PW 4 @ZIF-8 showed good catalytic activity for various sulfides under moderate conditions. In addition, DBT removal rate catalyzed by 27.5%-PW 4 @ZIF-8 could still reach levels of 95.1% after 10 cycles. The high efficiency of activity and excellent reusability are attributed to the high matching of host and guest sizes. This work provides new inspiration for designing and preparing catalysts with high activity and excellent reusability by a simple and environmentally friendly method.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Hang-bo Zheng,Di Wu,Yuan-li Wang,Xiao-pan Liu,Peng-zhao Gao,Wei Liu,Jin Wen,Evgeny V. Rebrov
A new approach was proposed for the preparation of metal–organic framework/metal oxide composites in one step using only metal salts. Here, crystalline rhombohedral dodecahedron ZIF-8, hollow ZnO microsphere , and ZIF-8/ZnO composites were obtained in different one-pot solvothermal processes where the growth toward individual ZIF-8 and ZnO phases and toward ZIF-8/ZnO composites was controlled by adjusting the ratio of metal salts to 2-methylimidazole. Subsequently, a series of derived (C and/or N)-doped ZnO nanoparticles was obtained by a two-step calcination process. The absorption kinetics and photocatalytic activity in methyl orange degradation under visible light were investigated. ZIF-8-derived ZnO could maintain their original morphology and displayed excellent photocatalytic activity 10 times higher than that of the original ZIF-8.
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Carbon Letters
·
2023
·Vol. 33
·期 7
·2029-2039
·
IF 4.5
Lou Jie,Fu Qiuping,Yu Lei,Yuan Hui,Zhao Jie,Wei Xinde,Wang Tong,Mo Changli
An environmentally friendly and low-cost chitosan-containing polysaccharide (CP) composite ZIF-8/CP was designed and prepared based on the difficulty of separating the traditional adsorbent from the water phase. ZIF-8/CP was synthesized through in-situ growth approach. The physical, chemical and structure properties of ZIF-8/CP were determined through a series of characterization methods, including SEM, FT-IR and PXRD. The effects of touch time, pH, temperature, and co-existing ions on adsorption were assessed. In addition, kinetics, isotherms of adsorption and thermodynamics were examined. The data of isotherms for adsorption indicated that the adsorption of ZIF-8/CP on MG was similar to the Langmuir model, with a maximum adsorption capacity of 1428.57 mg/g. Moreover, the kinetic parameters were consistent with the pseudo-2nd-order equation. Thermodynamic studies (Δ G < 0, Δ H > 0) demonstrated a heat-absorbing and spontaneous adsorption process. Our study reveals that ZIF-8/CP has good adsorption properties and environmental properties.
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Small
·
2020
·Vol. 16
·期 11
·1907141
·
IF 11.459
Chengzhan Yan,Huaping Zhao,Jun Li,Huile Jin,Long Liu,Wanyi Wu,Jichang Wang,Yong Lei,Shun Wang
The high theoretical capacity of red phosphorus (RP) makes it a promising anode material for lithium-ion batteries. However, the large volume change of RP during charging/discharging imposes an adverse effect on the cyclability and the rate performance suffers from its low conductivity. Herein, a facile solution-based strategy is exploited to incorporate phosphorus into the pores of zeolitic imidazole framework (ZIF-8) derived carbon hosts under a mild temperature. With this method, the blocky RP is etched into the form of polyphosphides anions (PP, mainly P 5 − ) so that it can easily diffuse into the pores of porous carbon hosts. Especially, the indelible crystalline surface phosphorus can be effectively avoided, which usually generates in the conventional vapor-condensation encapsulation method. Moreover, highly-conductive ZIF-8 derived carbon hosts with any pore smaller than 3 nm are efficient for loading PP and these pores can alleviate the volume change well. Finally, the composite of phosphorus encapsulated into ZIF-8 derived porous carbon exhibits a significantly improved electrochemical performance as lithium-ion battery anode with a high capacity of 786 mAh g −1 after 100 cycles at 0.1 A g −1 , a good stability within 700 cycles at 1 A g −1 , and an excellent rate performance.
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Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 21
·3213-3224
·
IF 8.683
Wenfang Miao,Feirong Huang,Xiaochen Shen,Shaopeng Li,Xingru Cao,Xuefeng Zhang,Jieyi Yu,Xinglong Dong
The development of high-efficiency, stable, and low-cost Fe–N–C electrocatalysts for the oxygen reduction reaction (ORR) has attracted considerable attention. Herein, a stable atomically dispersed Fe–Nx-based catalyst was synthesized from a hierarchical structure involving carbon nanofiber (CNF)-supported zeolitic-imidazolate-framework-8 (ZIF-8) encapsulated Fe–Phen complex ((Fe,N)-ZIF-8/CNFs). The Fe–Nx–CNFs obtained from the pyrolysis of (Fe,N)-ZIF-8/CNFs showed a good hierarchical multi-layer structure. The natural network structure of the carbon nanofibers serves as a matrix to uniformly distribute the ZIF-8 particles, and the Fe–Nx sites derived from the Fe–Phen complex were uniformly distributed in ZIF-8 particles. It exhibits excellent ORR performance with a high half-wave potential of 0.875 V (vs. RHE), which was 55 mV higher than that of the commercial Pt/C catalyst. In addition, density functional theory (DFT) calculations on the catalyst further revealed the origin of the ORR activity via a 4e− pathway from the precise local coordination of FeN4 sites.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Baowen Fan,Xinyue Lei,Yajian Qin,Zhilin Ren,Wei Gong,Jing Li,Shuang Cai
Residues of tetracycline antibiotics pose a significant threat to the ecological environment and human safety, drawing widespread attention. In this study, a novel multifunctional nanozyme, Fe 3 O 4 QDs@ZIF-8, was synthesized by loading Fe 3 O 4 quantum dots (QDs) onto zeolitic imidazolate framework-8 (ZIF-8) using a straightforward and mild co-precipitation method at room temperature. The nanozyme exhibited favorable peroxidase-like (POD-like) activities, with K m values of 0.24 mM for TMB and 0.53 mM for H 2 O 2 , respectively. The inhibition of the POD-like activity of the nanozyme by tetracycline (TC) facilitated the development of a colorimetric and visual dual-modal detection system for TC, with detection limits of 0.015 mg/L and 0.12 mg/L, respectively. Furthermore, the nanozyme exhibited a porous structure similar to that of ZIF-8, with a specific surface area and pore diameter measured at 927.4 m 2 /g and 5.7 nm, respectively, resulting in an impressive adsorption capacity for TC of 1625.35 mg/g. Additionally, the band gap value of 4.16 eV indicates a strong photocatalytic oxidizing ability, enabling nearly complete degradation of the remaining TC after adsorption. The total removal efficiency of TC through adsorption and photocatalytic degradation reached 97.75 %. In the detection and remediation of TC in tap water and river water samples, Fe 3 O 4 QDs@ZIF-8 demonstrated superior sensitivity compared to high-performance liquid chromatography and exhibited a significantly higher removal efficiency than powdered activated carbon. A diagnostic and therapeutic integration platform for TC based on Fe 3 O 4 QDs@ZIF-8 has been successfully established. This platform integrates adsorption, detection, and photocatalytic degradation, providing a novel dual-mode detection and dual-procedure treatment for tetracycline antibiotic residues in the environment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yipeng Pang,Maofang Zhao,Yuhan Xie,Yanping Wang,Yuxin You,Yongding Ke,Chaoyi Zhang,Xiaohan Chen,Yijia Yang,Chunlei Zhang,Xi Chen,Yi Liu,Xingtang Fang
The development of non-antibiotic strategies for combating bacterial infections, particularly through reactive oxygen species (ROS) accumulation accompanying inflammation, has attracted much attention. Despite Allicin (Ac) emerges as a promising antimicrobial agent with wide and remarkable bioactivity, it still displays quite limited ROS scavenging and anti-inflammation capacity due to uncontrolled and poor bioavailability. Herein, a multifunctional nanoplatform with pH-dependent and ROS-scavenging antibacterial, anti-inflammatory and proangiogenic properties is introduced to promote infected wound healing by integrating Ac into silver nanoparticles (AgNPs)-loaded zeolite imidazole framework (ZIF-8), namely Ac@ZIF-8/AgNPs. Primarily, the nanoplatform is activated and controlled release in the infection microenvironment, with disrupting biofilms, scavenging ROS and antibacterial capacitys, outperforming conventional Ac. Moreover, in the mouse models induced by bacterial infection, Ac@ZIF-8/AgNPs can alleviate the inflammatory condition, scavenge ROS, facilitate the regeneration of collagen fiber and enhance vascular formation, collectively accelerating wound healing. Overall, this biocompatible nanoplatform is provided as a reliable approach to solve the long-standing problem of infected wound healing.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhang Liu,C. Marquina,Wei Han,Joseph K.C. Kwan,M. Ricardo Ibarra,King Lun Yeung
This study presents the synthesis of Fe 3 O 4 @Zeolite Imidazolate Framework-8 (Fe 3 O 4 @ZIF-8), a novel magnetic core–shell adsorbent engineered for enhance adsorption of organic pollutants. The process begins with the formation of spherical magnetite aggregates (i.e., Fe 3 O 4 ) via a solvothermal method, using polyacrylic acid for stabilization and capping. A ZIF-8 shell is then grown through a sol gel process followed by reaction with 2-methylimidazole, resulting in a crystalline shell approximately 60 nm thick. Characterization techniques, including energy dispersive X-ray analysis and X-ray diffraction, confirm the successful preparation of Fe 3 O 4 @ZIF-8. The adsorption capabilities were evaluated using methylene blue (MB) and diclofenac sodium (DCF) as model pollutants. Fe 3 O 4 @ZIF-8 demonstrated rapid removal efficiencies, with 98 % removal of MB (6.01 × 10 -4 mg·g −1 ·min −1 ) and DCF (4.43 × 10 -4 g·mg −1 .min −1 ) within 15 and 30 min, respectively, significantly outperforming conventional activated carbon. Thermodynamic studies indicate that the adsorption processes are spontaneous; enthalpic changes drive MB adsorption, while DCF is influenced by entropic factors. Molecular modeling reveals preferential adsorption behaviors on different ZIF-8 facets, with stronger interactions for MB due to π-π stacking and hydrogen bonding. These findings underscore the potential of Fe 3 O 4 @ZIF-8 as an effective adsorbent for water purification, highlighting its substantial adsorption capacity (73.2 mg·g −1 for MB and 53.8 mg·g −1 for DCF), stability, and reusability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yiqian Lv,Jingmao Zhao,Baomin Fan,Muhammad Mubeen,Mahmood Mubashar,Fangze Zi,Yinxin Liu,Wanling Wang,Muhammad Jawad,Xuan Wang,Shuai Liu
To overcome the inherent limitations of epoxy (EP) coatings in terms of barrier performance, active protection, and weathering resistance, this work presents a multifunctional composite strategy based on hierarchically engineered nanohybrids. Polyaspartic acid (PASP), in coordination with Ca 2+ , was co-functionalized on zeolitic imidazolate framework-8 (ZIF-8) nanoparticles that were in-situ grown on α-ZrP platforms. The resulting PASP-Ca@ZIF-8/ZrP nanohybrids exhibited excellent dispersibility and interfacial compatibility within EP matrix, enabling the fabrication of an advanced PCZZ/EP coating with robust mechanical properties (adhesion strength of 6.7 MPa and tensile strength of 52.3 MPa) and an exceptional barrier performance (| Z | 0.01Hz of 7.1 × 10 10 Ω·cm 2 after 90 days of immersion in 3.5 % NaCl solution). The nanohybrids endowed the coating with pH-responsive release of inhibitory species (PASP, Ca 2+ , Zn 2+ , and 2-MI) imparting a dynamic self-repairing function that effectively mitigated localized corrosion, as validated by salt spray and filiform corrosion tests. During 144 h of accelerated UV exposure, the | Z | 0.01Hz value of PCZZ/EP coating retain over 1 × 10 8 Ω·cm 2 , demonstrating its excellent weathering-resistance. Molecular dynamics simulations further revealed the highest crosslinking density (96 %) and the lowest Cl − diffusion coefficient (0.0159 cm 2 /s) of PCZZ/EP model, indicating a dense internal network that restricted ion transport. This work establishes a scalable and versatile design framework for developing high-performance smart epoxy coatings, offering both mechanistic insight and practical solutions for the long-term protection of steel infrastructures in severe marine and industrial environments.
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