SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Wenyu Li,Hui Yu,Ming Yang,Xiangting Dong,Ying Yang,Tianqi Wang
Photosensitized metal oxide gas sensors have been a research hotspot in the field of gas sensors in recent years, the vast majority of related studies use the ultraviolet light as the excitation light source, there are relatively few related studies on the ceramic gas sensors using a single LED as the excitation light sources, and even fewer studies on using natural sunlight as the light excitation source. In this study, porous ZnO precursor particles were introduced into the channels of ZIF-8 to ensure the integrity of its skeleton after calcination, and ZnO/ZIF-8 derivative was prepared and used to construct gas sensors to detect NO x under the different excitation light source (the natural sunlight, 365 nm LED and xenon lamp). Compared with the test under darkness conditions, the operating temperature was reduced 70℃ under light excitation conditions, the gas-sensitive response of the gas sensor to 20 ppm NO x under the natural sunlight excitation was 7.48 times of the darkness conditions, and the measured detection limit was as low as 50 ppb. Under the excitation of natural sunlight, 365 nm LED or xenon lamp, the room temperature gas sensitive response to NO x gas could be achieved. The prepared gas sensor was used for the actual detection of NO x concentration in vehicle exhaust, which showed the attractive practicality and excellent detection sensitivity.
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DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Onyeagoro Robinson Uzochukwu,Chen Lin,Ruichao Zhu,Jin Wu,Yixuan Zhou,Zhu Liang
Hydrophobic membranes, such as polytetrafluoroethylene (PTFE), are prone to pore wetting during membrane distillation when treating wastewater containing amphiphilic contaminants. In this study, a Janus membrane composed of zeolitic imidazolate framework-8 (ZIF-8) and polyvinyl alcohol (PVA) was fabricated via vacuum filtration and employed in air-bubbling-assisted direct contact membrane distillation (DCMD). The optimal membrane, with a 0.815 mg/cm 2 ZIF-8 loading, achieved a desalination rate of 99 %, a stable vapor flux of 20.53 L/(m 2 ·h), and a permeate conductivity of less than 1.44 μS/cm during 25 h of operation. However, the increasing concentration of SDS in the feed solution over time led to an increase in conductivity, which pointed to a reduction in the membrane's anti-wetting performance, suggesting the limitations of ZIF-8 alone in mitigating wetting. To overcome this, continuous air bubbling was introduced, which significantly enhanced wetting resistance and extended the membrane's operational lifespan to 48 h. Higher airflow rates (5.93 L/min) yielded optimal performance. Furthermore, a Random Forest machine learning model was employed to predict permeate flux and conductivity based on key operational parameters, achieving a coefficient of determination (R 2 ) greater than 0.73. Collectively, this study demonstrates the synergistic potential of the ZIF-8/PVA@PTFE Janus membrane combined with air-bubbling assistance to effectively suppress wetting and enhance the efficiency and durability of membrane distillation for challenging wastewater.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Qiuli Zhang,Jiahui Liu,Saifei Hu,Chengxian Yin,Naixin Lv,Rong Wei
Metal-organic framework (MOF) materials have significant advantages in corrosion protection due to their remarkable specific surface area and exceptional porosity. This work combined cerium dioxide (CeO 2 ) nanoparticles and zeolitic imidazolate framework-7 (ZIF-7) with the long-chain hydrophobic agent hexadecyltrimethoxysilane (HDTMS) to create a composite nanostructure (CeO 2 @ZIF-7@HDTMS) with a multistage barrier function. The structure takes CeO 2 nanoparticles as the core to achieve chemical corrosion inhibition by using its oxygen-deficient property; ZIF-7 is induced to form an ordered microporous adsorption layer at its periphery by surface carboxylic acid molecules; and ultimately, the outer repulsive barrier is constructed with the help of hydrophobic modification of HDTMS, thus forming a synergistic anticorrosion mechanism in three dimensions, namely physical barrier, chemical passivation, and hydrophobic protection, and constructing a ‘Physical barrier + double synergistic corrosion inhibition’ three-level protection system. The successful preparation of CeO 2 @ZIF-7@HDTMS nanoparticles was confirmed by a number of characterization tools, such as field emission scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). Subsequently, they were well characterized by electrodynamic polarization curves, electrochemical impedance spectroscopy (EIS), and salt spray test aspects, which indicated that CeO 2 @ZIF-7@HDTMS epoxy composite coatings have good corrosion protection and hydrophobic properties. After 60 days of immersion, EIS analysis showed that the impedance of the 1.0 % EP/CeO 2 @ZIF-7@HDTMS coating was still as high as 4.636 × 10 8 Ω·cm 2 and its low-frequency impedance was about two orders of magnitude higher than that of the pure epoxy coating, which further indicated that the composite coating could provide excellent corrosion resistance and durability. In conclusion, CeO 2 @ZIF-7@HDTMS nanoparticles as fillers offer an innovative idea for the development of multifunctional and long-life anticorrosive coatings, broaden the application of metal oxide@MOF composites, and open up a new direction for the design and preparation of nanostructured materials.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Xiaokai Feng,Jing Zhao,Mingzhu Xie,Yangyang Guo,Haojin Xu,Yinglu Li,Fei Liang,Kaijin Hu
ZIF-8 NMOFs have been widely utilized in the field of nano-drug delivery system, due to the highly ordered porous structure, large specific surface area, and pH responsiveness. In this study, ZIF-8 NMOF was synthesized using 2-methylimidazole (H-MIM) as the ligand and zinc nitrate hexahydrate as the metal salt. Utilizing 5-fluorouracil (5-FU) as a drug model, mussel biomimetic chitosan (Cat-CS) modified NMOFs was constructed as a drug carrier through surface modification. The particle size, structure and morphology were characterized using DLS, SEM, XRD, FT-IR and TG, and the pH-responsive property of the NMOFs was investigated. The results showed that the average particle size of the NMOFs was 186.75 nm, and the drug loading capacity and encapsulation efficiency were 9.02 % and 64.79 %, respectively. In vitro controlled release studies showed that the sustained and controlled drug release can be achieved after surface modification, with maximum cumulative release rates of 63.80 %, 43.81 %, and 34.88 % at pH 1.4, 4.0 and 7.4, significantly increasing drug release under acidic conditions and demonstrating excellent pH responsiveness. In all, the prepared NMOFs exhibit excellent stability, pH-responsiveness and biocompatibility, further prolonging drug release time and improving bioavailability, which can be used as an ideal drug carrier to enhance the efficient drug delivery.
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高影响因子
International Journal of Electrochemical Science
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2024
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IF 1.3
Jiang Pei,Wang Haibo,Fan Chenli,Zhang Xiaomi,Huo Tiantian,Xu Yiwei
A novel electrochemical sensor modified by aspartic acid polymer and carbonized-ZIF-67 was prepared for arbutin detection. ZIF-67 was synthesized and carbonized, and then used as the substrate supporting of electrochemical sensor. Carbonized-ZIF-67 had a large specific surface and good electrical conductivity, which provided large electroactive area and promoted the electron transfer at the sensing interface. Aspartic acid polymer was prepared by cyclic voltammetry. Aspartic acid polymer could effectively absorb arbutin, resulting in the preconcentration of arbutin on sensor surface. Benefiting from the synergistic effect between carbonized-ZIF-67 and aspartic acid polymer, the prepared electrochemical sensor exhibited sensitive electrochemical response for arbutin. Under the optimum conditions, the electrochemical sensor achieved a wide linear range in the range from 5 to 110 μmol/L and a low detection limit of 0.41 μmol/L for arbutin. In practical application, the electrochemical sensor was employed to detect arbutin in green tea and whitening cream samples, exhibiting satisfactory recovery rates. With the outstanding features of easy operation, rapid response and high sensitivity, the prepared electrochemical sensor provided a convenient and effective tool for arbutin detection.
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高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Chenhao Li,Yi Niu,Linlin Yi,Yaoqiang Li,Jia Fu,Fang Tang,Kaiyuan Li,Yanyan Zou
This paper explores the application of zeolitic imidazolate framework-8 (ZIF-8) in pyrolytic disposal of poly(vinyl chloride) (PVC), with the goal of assessing the in situ catalytic removal and capture effect of ZIF-8 on Cl, elucidating the migration pattern of Cl, revealing the mechanism of in situ Cl capture by ZIF-8. The results demonstrate that excellent catalytic and Cl trapping properties are exhibited by ZIF-8, and an additional 311.1 mg/g of organic Cl from PVC is facilitated to be removed at 250 ºC. The catalytic effect enhances Cl trapping at low temperatures. The solid-solid reaction between PVC and ZIF-8 during in situ pyrolysis significantly improves Cl capture compared to ex situ pyrolysis. During in situ pyrolysis, ZIF-8 shows excellent Cl capture between 250 and 350 ºC, where Cl is primarily captured in the solid phase as inorganic Cl. ZIF-8 achieves optimal Cl capture at 300 ºC, reaching a peak HCl removal rate of 89.5 %. At this temperature, the content of solid-phase inorganic Cl reaches a maximum of 442.0 mg/g, accounting for 78.7 wt% of the total Cl content. The key to Cl capture lies in the chemical adsorption sites of Zn²⁺ and organic ligands in the ZIF-8 structure, which can react with Cl in both solid-solid and gas-solid reactions. Additionally, crystals formed during pyrolysis create an adsorption barrier, ultimately enabling efficient Cl capture.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Haimin Liu,Mengmeng Jin,Da Zhan,Jinming Wang,Xiaoyi Cai,Yongting Qiu,Linfei Lai
Structure modulation of transition metal phosphides at the atomic scale can significantly modify their catalytic properties. Herein, stacking faults abundant Ni 2 P/Co 2 P electrocatalysts with outstanding bifunctional oxygen evolution and hydrogen evolution property have been prepared. The stacking faults are formed by slow dissolution of Ni substrate by Mo 6+ and further redeposition of Ni 2+ during the growth of Co(OH)F crystals. Unprecedentedly, the distinct mechanistic etching-redeposition pathway dictated by the stacking faults, heterostructures and crystal lattice deformation leads to lattice expansion of Co 2 P and enables preferred reactants adsorption. Electrolysis cell employing Ni 2 P/Co 2 P electrocatalysts as a bifunctional catalyst for both the cathode and the anode delivers a current density of 10 mA cm −2 at a cell voltage of 1.57 V, which is comparable to the integrated Pt/C and IrO 2 counterparts. The exceptional electrocatalytic performance of Co 2 P/Ni 2 P-x%Mo indicates the redeposition mechanism a new methodology to modulate the structure and surface reactivity of electrocatalysts.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Jianxin Liu,Rui Li,Xiang Zu,Xiaochao Zhang,Yunfang Wang,Yawen Wang,Caimei Fan
Photocatalysis can produce NH 3 using N 2 and H 2 O at room temperature and atmospheric pressure, which has been considering as a safe, clean, and sustainable NH 3 synthesis. However, the poor solubility and slow diffusion rate of N 2 in water severely limited the nitrogen activation efficiency. Herein, we solve this problem by developing a hydrophilic-hydrophobic structure photocatalyst with gas-liquid-solid triphase reaction interface, where hydrophilic Bi 4 O 5 Br 2 is deposited on the surface of hydrophobic ZIF-8 to form a novel Bi 4 O 5 Br 2 /ZIF-8 composite photocatalyst. Such triphase interface architecture allows the direct delivery of N 2 from gas phase to the photocatalytic reaction interface replaced the diffusion of N 2 through the liquid phase. This rapid supply of N 2 can efficiently capture photoinduced electrons, thereby promoting the utilization efficiency of photo-induced electrons and the nitrogen fixation activation. This novel Bi 4 O 5 Br 2 /ZIF-8(30%) composite photocatalyst with good triphase contact performance shows obviously improved photocatalytic nitrogen fixation activity 327.338 μmol·L −1 ·h −1 ·g −1 (3.6 times than that of Bi 4 O 5 Br 2 ). Furthermore, efficient molecular nitrogen activation by Bi 4 O 5 Br 2 /ZIF-8 further brings out an attractive potential to improve other gas-consumption reactions, such as CO 2 reduction, according to this concept of triphase direct contact.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Song Duan,Baojie Dou,Xiuzhou Lin,Shixiong Zhao,Wilfred Emori,Jilin Pan,Hao Hu,Hang Xiao
In this study, uniform sized ZIF-8 was synthesized by microemulsion method, and a series of ZIF-8 modified epoxy coatings with different mass fractions were successfully prepared. EIS analysis revealed the improved anti-corrosion performance of the modified epoxy coating with increasing mass fraction of ZIF-8 fillers, and this was confirmed by the results of the salt spray and adhesion tests . In addition, the tensile strength and friction properties of the epoxy coating have also been greatly improved. These phenomena were explained by the chemical cross-linking between ZIF-8 fillers and epoxy. The chemical cross-linking increased both the cross-linking density and the barrier performance of the epoxy coating, consequently improving its anti-corrosion and mechanical properties.
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DOI
高影响因子
LANGMUIR
·
2023
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IF 3.9
Qiufen Liu,Xuelei Chen,Jiahao Wu,Liming Zhang,Guanjie He,Shouqin Tian,Xiujian Zhao
Metal–organic frameworks (MOFs) constructed by metal ions/clusters and organic linkers are used to encapsulate fluorescent guest species with aggregation-caused quenching (ACQ) effects to enhance fluorescence properties due to their porous structures and high specific surface areas. However, there would be a problem of matching between MOF pores and guest molecules’ sizes. In this paper, amorphous ZIF-8 was modified by carboxyl functional groups (H3BTC-ZIF-8) via introducing the 1,2,4-benzenetricarbonic acid (H3BTC) ligand into the ZIF-8 sol system. Moreover, H3BTC-ZIF-8 was used for the loading of organic fluorescent dyes rhodamine 6G (R6G) and coumarin 151 (C151) to prepare R6G/C151/H3BTC-ZIF-8 composite films. A white-light-emitting composite film (R6G/C151/H3BTC-ZIF-8) with CIE coordinates of (0.323, 0.347) was successfully prepared by compounding fluorescent dyes (R6G and C151) with H3BTC-modified ZIF-8, whose photoluminescence quantum yield (PLQY) can reach 64.0%. It was higher than the PLQY of the composite films prepared by crystalline ZIF-8 (40.2%) or amorphous ZIF-8 without H3BTC (48.0%) compounded with the same concentrations of dyes. The fluorescence enhancement was probably attributed to an increased amount of active sites of H3BTC-modified ZIF-8 interacting with dyes C151 and R6G. This can form hydrogen bonds between H3BTC-ZIF-8 and C151, and weak electron donor–acceptor (D–A) interactions between H3BTC-ZIF-8 and R6G molecules, respectively, thus enhancing the interactions between dyes and ZIF-8 and reducing the ACQ effect existing between dye molecules. Therefore, this strategy could provide an important guidance to develop white-light-emissive materials.
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高影响因子
MATERIALS & DESIGN
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2019
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IF 5.77
Lulu Xu,Ye Xiong,Baokang Dang,Zhangning Ye,Chunde Jin,Qingfeng Sun,Xiaohong Yu
Lightweight aerogels with superior cavities have attracted great interest in the field of electromagnetic wave absorbing materials. In this work, a hierarchical porous wood aerogel modified with Fe 3 O 4 /ZIF-67 (Fe 3 O 4 /ZIF-67@WA) with high compressibility and low-density was fabricated by in-situ anchoring of magnetic Fe 3 O 4 /ZIF-67 rhombohedral dodecahedron in naturally delignified wood aerogel. Combining the advantages of both aerogels and magnetic Fe 3 O 4 /ZIF-67 particles, Fe 3 O 4 /ZIF-67@WA reveals excellent compression-resilience and efficient microwave absorption performance. It possesses a maximum reflection loss (RL) of about −23.4 dB at a low thickness of 1.5 mm and a specific electromagnetic shielding effectiveness of up to ~156.3 dB cm 3 g −1 . Moreover, the composites exhibit a broad absorption bandwidth under an ultrahigh frequency of 13.5–18.0 GHz. In view of those excellent absorbing effects, the prepared green magnetic Fe 3 O 4 /ZIF-67@WA is likely to be used as a lightweight shielding material against electromagnetic radiation, especially for smart building and miniaturized device applications.
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高影响因子
Journal of Water Process Engineering
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2022
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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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高影响因子
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