CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lianzhong Shen,Lin Wang,Yu Ye,Zhouwei Li,Qizhou Dai
The fabrication of various defects on the surface of metal single-atom catalysts can improve their electrochemical CO 2 reduction reaction (CO 2 RR) ability, and the current mainstream research focuses on the defect modification of heteroatom doping, while there are fewer studies on intrinsic defects on carbon substrates. Herein, a series of catalysts with both Fe-N 4 sites and intrinsic defects were synthesized on the ZIF-8 surface by pyrolytic etching at a suitable temperature under ammonia atmosphere. Electrochemical tests in an H-cell showed that the catalyst achieved CO Faradaic efficiency (FE CO ) of 96.9 % and CO partial current density (J CO ) of 9.088 mA cm −2 at −0.6 V. Through further studies, we introduced a “585” ring structure to describe these intrinsic defects and found that these intrinsic defects on the carbon-based surface can act as active sites to promote CO 2 RR along with the Fe-N 4 sites. This work provides a reference for the study of intrinsic defect-modified single atomic materials.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Lan Zhang,Tingting Zhang,Shiying Wu,Lujie Li,Wei Li,Lingling Wang,Weihua Li,Xianhuai Huang,Jiansheng Li,Rui Lu
Although surface-enhanced Raman scattering (SERS) is a powerful spectral analysis technique, its practical application is restricted due to the poor chemical stability of some noble metal nanoparticles. In this work, Ag@ZIF-8 nanocomposites with different ZIF-8 core-shell thicknesses were prepared by coating AgNP surfaces with polyvinylpyrrolidone and adjusting the dosage of zinc nitrate and 2-methylimidazole. Several characterizations have confirmed that the Ag@ZIF-8 nanocomposites was successfully prepared. Based on transmission electron microscopy images and SERS spectral intensity, it was determined that Ag@ZIF-8 nanocomposites with a ZIF-8 shell thickness of 30 nm exhibited optimal SERS performance. As a result of evaluating the uniformity and stability of the composite with 4-ATP as the probe molecule, it showed a relative standard deviation of 6.91 % and a decrease in SERS intensity of 4.5 % after 28 days. Based on the results obtained with Ag@ZIF-8 nanocomposites as the SERS substrate, the detection limits of 4-mercaptopyridine and thiram were as low as 5.87×10 −9 M and 6.61×10 −8 M, respectively. Furthermore, the finite-difference time-domain simulation reveals an enhancement factor of 2.6×10 6 , which is in good agreement with the experimental value of 1.8×10 6 , confirming its effectiveness as a SERS substrate.
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高影响因子
TALANTA
·
2024
·
IF 5.6
Wenyan Zeng,Qingyuan Jiang,Chaofan Ruan,Wang Ni,Changchang Zhu,Xueling Zeng,Xuan Shi,Rongke You,Ning Ma,Fang-Chang Tsai
The emergence of stimuli-responsive fluorescence anti-counterfeiting technology has garnered increasing attention in the era of intelligent internet. Smart fluorescent hydrogels combine the characteristics of luminous materials with the unique structure of hydrogels, offering the potential for dynamic reversible erasing and multi-tiered data encryption. In this work, a fluorescent hydrogel was constructed by zeolitic imidazolate framework-8 loaded with fluorescein and then mixed with polyvinyl alcohol hydrogel, sodium carboxymethyl cellulose and borax, which could be used for image hiding in visible light. The reversible bonds cross-linked fluorescent hydrogel was stretchable and self-healing with a three-dimensional network structure. The hydrogel presented bright green fluorescence under 365 nm UV light, which was quenched by adding copper ions. Meanwhile, the imprint of the hydrogel could be cleared by L-Cysteine and repeatedly recorded information many times. The alkali-induced shape memory capability was further utilized to achieve multi-tiered data encryption by deforming it to a 3D-specific shape through folding. The rewritable and multi-dimensional encrypted hydrogel is expected to improve data security and reduce resource consumption.
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PubMed
高影响因子
Small
·
2025
·
IF 12.1
Hao Li,Zhihao Zhang,Dingding Zhu,Huiyuan Zheng,Zhongze Zhu,Nana Shen,Zhu Guo,Xiaolin Wu,Xiaoying Qi,Qiang Li,Qingming Ma,Hongfei Xiang
Low back pain (LBP) resulting from sciatic nerve compression presents major challenges in pain management, as traditional therapies provide only short-term relief and pose risks of systemic toxicity. In this study, an innovative Fe 3 O 4 @ZIF-8-RVC (FZR) dual-responsive nanoplatform is introduced that integrates magnetic targeting with pH-sensitive, sustained drug release to overcome these limitations. The FZR nanoplatform encapsulates ropivacaine (RVC) within the ZIF-8-coated Fe 3 O 4 core, enabling precise and prolonged analgesia at the injury site through magnetic guidance and acid-triggered release. In vitro and in vivo assessments indicate that FZR achieves high drug loading, sustained release in acidic environments, and excellent biocompatibility, significantly extending analgesic effects in chronic nerve injury models while minimizing systemic exposure. Behavioral tests and molecular analyses in LBP rat models confirm that FZR effectively suppresses pain-related neuronal activity and central sensitization markers. This dual-responsive nanoplatform FZR offers a safe, long-lasting, and targeted therapeutic approach, holding strong potential for advancing pain relief in LBP and related neuropathic pain conditions.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yi Shao,Hao Suo,Shuting Wang,Yaou Peng,Xiaoying Chu,Ziyue Long,Kanghui Du,Lili Su,Xinyue Sun,Xinyi Wang,Qingying Wang,Renlong Li,Bailiang Wang
Eye trauma, ophthalmic surgery and contact lens (CL) wearing cause corneal infection and bacterial biofilms formation, which further lead to corneal ulcer and perforation. In view of the low bioavailability of antibiotic eye drops and the clinical problems that cause bacterial resistance, we used pH sensitive zeolitic imidazolate framework-8 metal–organic frameworks (ZIF-8 MOFs) to load broad-spectrum antibacterial drugs levofloxacin (LEVO). After the surface modification by hyaluronic acid (HA), the nanomaterial surface was negatively charged. A simple amination treatment was used to endow CL surface with amino groups to combine the negatively charged nano drug loading system through electrostatic forces. The bacteriostatic ring of ZIF-8@LEVO@HA-PEI modified CL (ZLHP-CL) was 34 mm, which could be owing to the high drug loading capacity of ZIF-8 (0.65 mg/cm 2 ). The bactericidal function was further confirmed by shake flask method and live/dead bacterial staining assay against S. aureus , S. epidermidis and E. coli . It is worth mentioning that ZLHP-CL showed significant pH sensitivity to the bacterial infection, which released drug rapidly at pH 5.5 and hardly released drug at pH 7.4. In the bacterial biofilm’s formation experiment, it was found that ZLHP-CL obviously inhibited bacterial adhesion and biofilms formation. Furthermore, it was proved in infectious keratitis animal that ZLHP-CL could kill the bacteria and reduce the inflammation reaction, which showed advantages in corneal tissue repair and light transmittance maintenance. In this work, based on nanotechnology, a facile CL drug loading technology is developed, which can be used to sustained release of various drugs for ophthalmic diseases treatment.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
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IF 12.2
Xiaoqing Wang,Shangkun Liu,Shaolei Chen,Xubin He,Wenjing Duan,Siyuan Wang,Junzi Zhao,Liangquan Zhang,Qing Chen,Chunhua Xiong
Given the necessity and urgency in removing organic pollutants such as malachite green (MG) from the environment, it is vital to screen high-capacity adsorbents using artificial neural network (ANN) methods quickly and accurately. In this study, a series of ZIF-67 were synthesized, which adsorption properties for organic pollutants, especially MG, were systematically evaluated and determined as 241.720 mg g −1 (25 ℃, 2 h). The adsorption process was more consistent with pseudo-second-order kinetics and Langmuir adsorption isotherm , which correlation coefficients were 0.995 and 0.997, respectively. The chemisorption mechanism was considered to be π-π stacking interaction between imidazole and aromatic ring. Then, a Python-based neural network model using the Limited-memory BFGS algorithm was constructed by collecting the crucial structural parameters of ZIF-67 and the experimental data of batch adsorption. The model, optimized extensively, outperformed similar Matlab-based ANN with a coefficient of determination of 0.9882 and mean square error of 0.0009 in predicting ZIF-67 adsorption of MG. Furthermore, the model demonstrated a good generalization ability in the predictive training of other organic pollutants. In brief, ANN was successfully separated from the Matlab platform, providing a robust framework for high-precision prediction of organic pollutants and guiding the synthesis of adsorbents.
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PubMed
高影响因子
Applied Sciences-Basel
·
2024
·Vol. 14
·期 5
·2118
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IF 2.5
Mengping Huang,Shuai Ma,Jinrong He,Wei Xue,Xueyan Hou,Yuqi Zhang,Xiaofeng Liu,Heping Bai,Ran Li
Amino acids found in minor coarse cereals are essential for human growth and development and play a crucial role in efficient and rapid quantitative detection. Surface-enhanced Raman spectroscopy (SERS) enables nondestructive, efficient, and rapid sample detection. Traditional SERS detection efficiency is constrained by the use of a single target. In this study, three different amino acids (cysteine, valine, and tryptophan) were detected simultaneously using a ZIF-8@AuNPs composite substrate. The linear range of detection was 10−3to 10−1M, with limits of detection (LODs) of 2.40 × 10−4M, 2.24 × 10−4M, and 1.55 × 10−4M, respectively. Same linear ranges and LODs were achieved with a one-dimensional convolutional neural network method. Furthermore, this substrate enabled the effective detection of amino acids in millet and efficient detection of cysteine in health products. This study presents a novel method for simultaneous detection of multiple analytes.
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高影响因子
ENERGY
·
2024
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IF 9
Yuechi Che,Xiaopeng Jia,Yongjie Hu,Jian Li,Zhi Wang,Beibei Yan,Guanyi Chen
Tar catalytic removal is a key issue in biomass gasification , which is suffering from catalyst coking and sintering. Microwave technology is attractive due to the high activity on polar molecules and ability to lower activation energy . In this study, the Co/C derived from metal-organic frameworks (ZIF-67) was developed as a bifunctional microwave catalyst that can strengthen the interaction between microwave and tar catalytic reforming , and enhance the anti-coking and sintering ability. The effects of the temperature, heating method, tar concentration, and catalyst support on model tar conversion rate were investigated. The operating conditions at 700 °C and tar concentration lower than 20 g/m 3 can reach a promising conversion rate over 90.15 % under microwave irradiation . On the one hand, microwave heating groups performed better in conversion rate and coking compared to conventional heating, due to the active species generated from the microwave plasma . On the other hand, Co/C showed better performance in catalytic activity and sintering stability, due to the highly dispersion of cobalt nanoparticles and the confinement effect of carbon nanotubes on the catalyst surface . These findings proposed a novel approach for efficient biomass tar removal under microwave irradiation, and offered a potential tool to further reveal the mechanism in microwave driven tar steam reforming system.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Lei Zhang,Zhen Zhao,Hongming Zhang,Wanli Jiao
To detect trace hydrogen sulfide (H 2 S) safely, more sensitively and less expensively, a new synthesized ZIF-8-derived ZnO-supported Ag nanoparticle assemblies have been investigated. In the successful formation, ZIF-8 was synthesized in room temperature aqueous solution, followed by ultrasonication to produce Ag + /ZIF-8 compounds, and yielded Ag/ZnO assemblies after sintering. Various characterizations have been done to confirm the morphology, surface chemical state and electron distribution by XRD, SEM, XPS, BET and DRIFT. The sensing test results indicate that at an exciting operating temperature of 100 °C, the A-2 labeled sensor exhibits excellent H 2 S detection capabilities, including a response value of 104 for 2.5 ppm H 2 S, the minimum detection limit of 1.1 ppb, satisfied selectivity, significant resilience against humidity and long time stability. More significantly, a valuable test of 140 h real time detection of the H 2 S emission from fresh fish meat has been performed successfully, providing effective data for protein spoilage assessment. Rhombic dodecahedron structure, catalysis of Ag nanoparticles and overflow effect of H 2 S result in the distinct sensing mechanism, providing novel insights and theoretical foundations for developing highly efficient trace H 2 S gas sensors.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yuanyuan Wang,Suyue Zhong,Shumin Li,Yangyang Dai,Wenjun Su,Jian Li
Rapid industrialization poses a serious threat to the balance of ecosystems and environmental sustainability, and the application of membrane technology is an effective way to alleviate this situation. Two-dimensional (2D) MXene nanosheets are superior materials for constructing high-performance separation membranes, but their biggest drawback is that they are prone to agglomeration. After alkalizing them, the obtained alkaline MXene (TCOH) nanosheets have hydroxyl-rich surfaces, stabilized structure and great affinity for CO 2 . Based on this, a self-supported TA-ZIF-8/TCOH@Pebax mixed matrix membranes (MMMs) with block polymer Pebax-1657 as matrix and TA-ZIF-8/TCOH as composite filler were prepared in this work. ZIF-8 was modified with tannic acid (TA) to enrich the surface with hydroxyl groups, yielding TA-ZIF-8 that is both pro-CO 2 and well interfacially compatible. The using of TA-ZIF-8 not only improves the selectivity of the separation membrane, but also its mutually repulsive electrostatic force with TCOH can expand the layer spacing of TCOH nanosheets as much as possible, which leads to a rich gas transportation channel of the membrane. Experiments have shown that the prepared TA-ZIF-8/TCOH@Pebax MMM had outstanding separation performance beyond the 2019 Robinson upper bound when the content of TA-ZIF-8 was appropriate. Also, the TA-ZIF-8/TCOH@Pebax MMM showed superior thermal stability, durability and mechanical properties. In summary, the strategy of combining nanoparticles and nanosheets as composite fillers in this study provides an effective way to regulate the low permeance of MMMs. In the meantime, the application of TCOH provides a novel idea for further research on gas separation membranes.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Rui Guo,Xinyu Liu,Tianyi Dong,Jinsong Li,Zuju Shu,Zhongbo Li,Lijun Zhang
Rhodamine B (RhB) is a synthetic organic xanthene dye that is harmful to human health. RhB can easily be illegally added to food as a colorant due to its cheap and abundant. This work presents a molecularly imprinted (MIP) electrochemical sensor for the determination of RhB by modifying ZIF-67-derived N-doped carbon composite interconnected by MWCNTs (NC@MWCNT) and MIP on the surface of glassy carbon electrode. The sensor exhibited excellent performance for RhB detection due to the outstanding conductivity of NC@MWCNT and the specific adsorption of MIP. Under optimized conditions, the sensor had a wide linear response range (0.001–1000 nM) and a low detection limit of 1 pM. The sensor exhibits remarkable selectivity and can distinguish RhB molecules from dye molecules with similar structures and common metal ions. This work introduces a simple, economical, sensitive, and selective electrochemical detection method for RhB trace detection.
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高影响因子
POLYMER
·
2024
·
IF 4.1
Hongnan Zhang,Taoyuan Liu,Ke Li,Xiaohong Qin
Nowadays, modern industries are rapidly developing, which is caused by a significant amount of high-temperature exhaust gases in the atmosphere, and it contains complex pollutants, formaldehyde, solid particles, and harmful gases that are discharged. For this scenario, the conventional filtering materials are challenged for prevention of high-temperature exhaust gas formaldehyde volatilization because they are composed of metal and inorganic materials caused by oxidation-prone and resilient wear. A recently introduced technique to fabricate composite nanofiber membranes with high strength, modulus, efficiency, low resistance for high-temperature exhaust gas filtering, and its capability to adsorb formaldehyde was discussed in this study. Initially, Polyamide acid (PAA) solution and silicon dioxide (SiO 2 ) nanomicrospheres are used as raw materials for producing electrostatic and thermal imidization Polyimide (PI/SiO 2 ) nanofiber membranes (NFMs) in co-spinning processes. Furthermore, zeoliticimidazolate framework-8 (ZIF-8) was transferred into PI/SiO 2 NFMs and produced the PI/SiO2@ZIF-8 NFM. These findings show that adding SiO 2 nanomicrospheres reduced the fiber packing density as well as air filtration resistance, and PI/SiO2@ZIF-8 NFMs achieve up to 99.703% filtration efficiency and maintain a pressure drop of 178.7 Pa. The weight loss rate is only 4% at temperatures above 300 °C, and the heat resistance is outstanding. Moreover, the PI/SiO2@ZIF-8 NFMs demonstrate a good formaldehyde adsorption performance with a saturation adsorption capacity for formaldehyde within 4 hours of 41.58 mg/g, which is more than 12 times that of the PI/SiO2 NFMs without ZIF-8.
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高影响因子
危险品化学品经营许可证（带存储）