ACS Applied Nano Materials
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2024
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IF 5.3
Mengjie Yao,Hao Yu,Kai Ding,Zhengyang Du,Wenhui Zhang,Yun Xia,Xiaoying Pan,Wensong Wang,Xiang Liu,Shenjie Li,Yanyan Chen
With a high porosity and highly adaptable topology, ZIF-67 is considered the most promising photocatalyst and has received much attention and development. However, the photoactive electron extraction rate of ZIF-67 is still low, which is a major problem limiting its further development. In this paper, based on the type I structure and using quantum dots (QDs) as the active site, we obtain the QDs@ZIF-67/ZIF-8 heterostructure, which ensures high-yield hydrogen efficiency. Quantum dots, as the transmission site of photogenerated electrons, improve the photogenerated carrier utilization rate generated by the strong absorption ability of ZIF-67 in the visible-light region. Through careful characterization, it was found that the optimal photocatalytic rate of 4999.7 μmol·g–1·h–1, a value 30 times higher than that of QDs, provides an innovative band gap-matching design for adjusting the charge transfer characteristics of QDs with a narrow band gap, which realizes the efficient utilization of visible light.
研究领域:
材料科学
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能源科学
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化学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2020
·Vol. 55
·期 34
·16360-16373
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IF 3.553
Hu Chuanzheng,Xu Junhui,Wang Yazhen,Wei Menglian,Lu Zhen,Cao Chunhua
Zeolitic imidazolate frameworks (ZIFs)-based core–shell structured nanomaterials were synthesized. As supercapacitor electrode materials, they exhibit excellent performance due to the advanced intrinsic properties of ZIFs, such as high porosity, good stability and large surface area. The materials were characterized by SEM, TEM, XRD, FT-IR, XPS and BET. When synthesized core–shell structured nanomaterial was tested in a 3-electrode system, it exhibited a high specific capacitance of 1176.8 F g −1 at a current density of 1 A g −1 and a good cycling performance with 98.3% initial capacity retention after 1000 continuous charge–discharge cycles. An asymmetric supercapacitor (ASC) device was assembled by employing ZIF-67@amorphous ZIF and activated carbon as positive and negative electrode materials, respectively. The as-assembled ASC devices exhibited excellent stability that retained almost 100% of the initial capacity after 2000 cycles. To demonstrate the practical application of the ASC, two simple fully charged ASCs can light up the LED for over 2 min, which proved that the core–shell structured ZIF-67@amorphous ZIF material has a suitable potential for supercapacitor applications.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 23
·35204-35216
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IF 5.19
Song Xu,Mo Jingqian,Fang Yuting,Luo Shumin,Xu Jingjing,Wang Xu
We prepared a double-layer magnetic nanocomposite Fe 3 O 4 @ZIF-8@ZIF-67 by layer-by-layer self-assembly. Fe 3 O 4 @ZIF-8@ZIF-67 was used to remove tetracycline from an aqueous solution via a combination of adsorption and Fenton-like oxidation. Depending on the outstanding porous structure of the Fe 3 O 4 @ZIF-8@ZIF-67, a high adsorption capacity for tetracycline was 356.25 mg g −1 , with > 95.47% removal efficiency within 100 min based on Fenton-like oxidation. To better understand the mechanisms involved in integrated adsorption and Fenton-like oxidation, various advanced characterization techniques were used to monitor the changes in morphology and composition of Fe 3 O 4 @ZIF-8@ZIF-67 before and after removal of tetracycline. Scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) all supported adsorption and Fenton oxidation of tetracycline. This study extends the application of Fe 3 O 4 @ZIF-8@ZIF-67 for environmental remediation. Graphical abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CRYSTENGCOMM
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2025
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IF 2.6
Yanjun Wu,Jiaojiao Song,Jiang Wang,Qi Shi
In this work, ZIF-300 and ZIF-301 derivatives with tunable ellipsoidal cage sizes were synthesized by adjusting the ratio between the small-sized mIm and large-sized bbIm/cbIm ligands. During ZIFs synthesis, when the amount of the fixed ligand is equimolar to Zn²⁺, adjusting the content of the other ligand does not yield a continuously tunable structure. In contrast, maintaining an excess of one ligand relative to Zn²⁺ and varying the content of the other ligand enables the formation of ZIF derivatives with continuously tunable chemical compositions and ellipsoidal cage sizes. This tunability is likely due to the increased concentration of the fixed ligand, which enhances its competitive coordination ability within the ZIF framework. Consequently, ZIF-300 and ZIF-301 derivatives with adjustable long-axis cage sizes ranging from 6.5 Å to 9.6 Å were successfully prepared. Notably, the small cage-sized ZIF-300-S1 (6.5 × 6.1 Å2) and ZIF-301-S1 (6.5 × 6.6 Å2) exhibited exceptional molecular length separation of acetone (6.4 × 5.8 Å2) and butanol (8.4 × 5.5 Å2). Liquid-phase adsorption and breakthrough experiments confirmed their separation performance, and GCMC simulations provided further insights into the separation mechanism.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Sihan Ai,Yong Xiang,Xue Chen,Yanlin Zhang,Yufei Zhang,Kangning Lv,Xin Chen,Daoyong Yu,Baosheng Ge,Fang Huang
Carbon dioxide capture, utilization and storage (CCUS) technology is considered an effective solution to achieve carbon neutrality. In CCUS, chemical absorption stands out as an efficient CO 2 capture method suitable for environments with low CO 2 partial pressures. This study aims to enhance the CO 2 capture performance of monoethanolamine (MEA) solution by employing zeolitic imidazolate frameworks ZIF-8 and ZIF-67 as catalysts. The impacts of catalyst concentration and experimental temperature on the quantity, rate of absorption, rate of desorption, and reusability of MEA for CO 2 absorption were investigated. Changes in the volume concentration of CO 2 in the mixed gas were monitored to assess these parameters. The results demonstrated that at a catalyst concentration of 150 mg/mL for ZIF-8 and 125 mg/mL for ZIF-67, MEA achieved CO 2 absorption quantity of 22.22 % and 18.89 %, respectively. This corresponded to substantial increases of 63.39 % and 125.9 % in the CO 2 maximum absorption rate of MEA solution. While the maximum desorption rate of MEA was enhanced by 49.71 % and 83.28 %. In conclusion, the introduction of ZIF-8 and ZIF-67 catalysts effectively catalyzed the CO 2 capture process, significantly enhancing the CO 2 capture quantity of MEA and ensuring energy-efficient regeneration of MEA. This study provides a novel approach for improving the performance of MEA in terms of capturing CO 2 .
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
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2024
·Vol. 29
·期 11
·2426
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IF 4.2
Liming He,Hongda Xu,Yang Cui,Jian Qi,Xiaolong Wang,Quan Jin
Carbon-based magnetic metal composites derived from metal–organic frameworks (MOFs) are promising materials for the preparation of broadband microwave absorbers. In this work, the leaf-like co-doped porous carbon/carbon nanotube heterostructure was obtained using ZIF-L@ZIF-67 as precursor. The number of carbon nanotubes can be controlled by varying the amount of ZIF-67, thus regulating the dielectric constant of the sample. An optimum reflection loss of −42.2 dB is attained when ZIF-67 is added at 2 mmol. An effective absorption bandwidth (EAB) of 4.8 GHz is achieved with a thickness of 2.2 mm and a filler weight of 12%. The excellent microwave absorption (MA) ability is generated from the mesopore structure, uniform heterogeneous interfaces, and high conduction loss. The work offers useful guidelines to devise and prepare such nanostructured materials for MA materials.
研究领域:
材料科学
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电磁学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Shuo Guan,Chuantong Cheng,Yunhao Ning,Bao Zhang,Bingyu Qin,Beiju Huang
Crystal engineering using passivation to reduce perovskite defects is crucial to improving the quality of perovskite crystals and optoelectronic properties. Because of their unique properties, metal–organic framework materials have been used as an emerging and effective passivator for perovskite materials and optoelectronic devices. This paper focuses on the differences in the optoelectronic properties of zeolite imidazolium ester framework materials (ZIF-11 & ZIF-23) doped with different conjugated ring ligands for perovskite photodetectors. This paper proposes a simple and effective method to dope zeolite imidazolium ester framework nanoparticles (ZIF-11 & ZIF-23) into organic–inorganic perovskite MAPbI3 films. The crystalline quality of the perovskite films was improved after doping with ZIF-11 and ZIF-23. Meanwhile, the performance of the planar photoconductive devices was significantly improved. The photoresponsivity of the photodetector doped with ZIF-23 was 0.185A/W, and the detectivity was 4.22 × 1012 Jones. The photoresponsivity of the photodetector doped with ZIF-23 was 0.164 A/W, and the detectivity was 3.27 × 1012 Jones. The devices maintained long-time operational stability, operating without significant degradation for 480 s under the 1.2 V bias voltage operating condition. In addition, we observed a significant suppression of the ion migration process in ZIF-23 for a voltage-controlled ion migration process. The potential application of perovskite and MOF heterojunction materials for image information acquisition and storage is demonstrated.
研究领域:
材料科学
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光电技术
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Ying-Hua Zhou,Xingyun Cao,Jingzhu Ning,Changchun Ji,Yong Cheng,Jing Gu
To exploit the low-cost and efficient catalyst for the hydrolytic dehydrogenation of ammonia borane , trace amount of palladium-doped transition metal (Cu, Ni, Co, Fe and Zn) nanoparticles have been incorporated into the interior of metal-organic frameworks named ZIF-8, ZIF-67, ZIF-67/ZIF-8 and core-shell ZIF-67@ZIF-8 by a double-solvent approach. The optimized catalyst of CuPd 0.01 @ZIF-67@ZIF-8 composite exhibited an excellent activity with a turnover frequency (TOF) value of 30.15 mol H 2 (mol metal ) −1 min −1 at 298 K and a relatively low activation energy of 38.78 kJ mol −1 . It might attributed to both ultrafine size of metal nanoparticles (~3 nm) induced by the confinement of core-shell ZIF-67@ZIF-8 and the synergistic effect between Pd and Cu. Moreover, the detailed kinetic study has manifested that this catalytic reaction is first-order in regards to the catalyst amount while zero-order as for the concentration of ammonia borane. In addition, the durability and recyclability of CuPd 0.01 @ZIF-67@ZIF-8 have been demonstrated to be great.
研究领域:
材料科学
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化学工程
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能源技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Zhonghang Xia,Han Zheng,Huiming Ji,Yiwen Zhang
H 2 gas sensors with facile preparation, high sensitivity and low detection limits are crucial for hydrogen energy safety. Given the high surface area, abundant porosity and high stability, zeolitic imidazolate frameworks (ZIFs) provide a potential development path for hydrogen sensors. In this work, ZIF-67@ZIF-8 modified with palladium nanoparticles (Pd NPs) was synthesized by room-temperature solution synthesis and NaBH 4 reduction method. The xPd@ZIF-67@ZIF-8 (x=10, 20, 30, 40) samples exhibit a rough mesoporous surface due to etching of NaBH 4 and feature a uniform distribution of Pd NPs. The modification of Pd NPs broadens the hole accumulation layer (HAL) of ZIF-67@ZIF-8 and decreases the resistance (from ~500 to 1 MΩ), thereby reducing the operating temperature. It is noteworthy that the operating temperature zone of 20 Pd@ZIF-67@ZIF-8 is 85-115 ℃ with higher hydrogen sensitivity than the other sensors at optimum operating temperature (≥ 100 ℃). Meanwhile, the 20 Pd@ZIF-67@ZIF-8 sensor demonstrates a rapid response speed to low concentration H 2 (response to 50 ppm H 2 within 8 s) on account of the spillover and catalytic effects of Pd NPs. Furthermore, the 20 Pd@ZIF-67@ZIF-8 sensor possesses a relatively low theoretical detection limit (16.5 ppb), and exhibits excellent moisture resistance, cycle and long-term stability. This sensitive material provides a prospective avenue for hydrogen energy safety monitoring.
研究领域:
材料科学
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传感器技术
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纳米技术
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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 4
·e202304908
·
IF 1.9
Jiajia Yang,Yawei Chen,Yiting Cao,Weiming Liu,Tongtong Zhang,Huiyun Zhou
Graphical In this paper, the nanocomposites with dodecahedral structure ZIF-8@ZIF-67 and BBH@ZIF-8@ZIF-67 have been synthesized by one-pot method. Bimetallic MOFs ZIF-8@ZIF-67 exhibited superior antibacterial properties and good biocompatibility. BBH-loaded ZIF-8@ZIF-67 showed enhanced synergistic antibacterial activity. Molecular docking suggests that PBP2a and DHFR may be potential antibacterial targets of BBH. Stimulus-responsive nanocarrier materials have garnered significant attention in biomedical science. Among them, metal-organic frameworks (MOFs) have emerged as promising candidates due to their remarkable antibacterial properties and pH sensitivity. In this study, a pH-responsive bimetallic MOFs carrier, ZIF-8@ZIF-67, was successfully synthesized for the delivery of berberine hydrochloride (BBH). Comprehensive characterization using UV-Vis spectroscopy, FT-IR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) confirmed the successful synthesis and structural integrity of ZIF-8@ZIF-67 and BBH@ZIF-8@ZIF-67. Subsequently, the drug release behavior, antibacterial efficacy, and biocompatibility of the composite material were systematically evaluated. Our findings revealed that BBH@ZIF-8@ZIF-67 exhibited well-controlled drug release properties, excellent antibacterial effects and biocompatibility. Furthermore, molecular docking results revealed that penicillin-binding protein 2a and dihydrofolate reductase in S. aureus may serve as two potential antibacterial targets for BBH. This research provides valuable insights into the use of bimetallic MOFs materials for developing highly efficient stimulus-responsive nanocarrier systems in biomedical applications.
研究领域:
纳米技术
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生物医学科学
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材料科学
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药学
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微生物学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2024
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IF 3.9
Wei Liu,Yu-Qing Zhang,Zhen-Lin Dong,Zi-Xuan Chen,Lei Li,Xin-Yuan Zhao,Yang Wu,Yu-Yang Zhang
Graphical Here, the core-shell structure of ZIF-90@ZIF-67 was applied for the first time to catalyze the tandem reaction in Pickering emulsion system, which exhibited excellent catalytic performance with 99.9 % yield. Furthermore, ZIF-90@ZIF-67 has high stability and maintains good reproducibility after five cycles. This work provides a platform for the design of structurally and functionally diverse MOF-based interfacial catalysis for Pickering emulsions. Exploiting advanced solid particles is crucial to the construction of Pickering emulsions catalysis. Recently, metal-organic frameworks (MOFs) have been used as ideal emulsifiers stabilizing Pickering emulsions for interfacial catalysis. Although Pickering emulsions stabilized by core-shell MOFs have significant importance in practical studies, to date there have been very limited reports on this topic. Herein, ZIF-90@ZIF-67, a core-shell material with simultaneous acid-base bifunctionality, was synthesized by seeded epitaxial growth. It was firstly applied as an emulsifier in Pickering emulsions to catalyze the deacetalization-Knoevenagel tandem reaction, which exhibited excellent catalytic properties and achieved extremely high yields. Additionally, ZIF-90@ZIF-67 showed high stability and remained well repeatable after five cycles. This work provides a platform for the design of structurally and functionally diverse MOF-based Pickering emulsions interfacial catalysis.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70008
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IF 0
Yawen Wu,Xueying Hou,Ao Li,Ruijian Li,Qingqing Yang,Shaohua Jiang,Jing yu Hu,Qingliang You,Rui Guo
As the amount of tetrachlorobisphenol A (TCBPA) that causes potential adverse effects on human health in the environment is continually increasing. It is therefore important to develop new materials for the adsorption or degradation of these compounds using various techniques. In this study, two novel magnetic recyclable composite catalysts Zr–NiFe 2 O 4 @ZIF-67 and Zr–NiFe 2 O 4 @ZIF-8 were synthesized. These catalysts degraded tetrachlorobisphenol A (TCBPA) in water by activating peroxydisulfate (PDS)/peroxymonosulfate (PMS), respectively. The results show that the Zr–NiFe 2 O 4 @ZIF-67-5%/LED/(NH 4 ) 2 S 2 O 8 system can degrade 95% of TCBPA (20 mg/L) within 30 min, whereas the Zr–NiFe 2 O 4 @ZIF-8-10%/LED/KHSO 5 system degrades 90% of TCBPA within 30 min. In instances of metal leaching at low concentrations, nickel and iron ions declined to 0.008 mg·L −1 , TCBPA exhibits highly efficient and sustainable catalytic properties, maintaining over 80% efficacy across six cycles. The online infrared test experiment results showed the major functional groups disappearing within approximately 130 s. The results of electron paramagnetic resonance and free-radical-quenching experiments showed that SO 4 ˙ − , ˙OH, 1 O 2 , and O 2 ˙ − were involved in the degradation of TCBPA. The possible degradation paths are isomerization polymerization, dechlorination, hydroxylation, ring-opening by oxidation, and further transformation into small molecules of acids, aldehydes, alcohols and other compounds. Thus, in this study, a reliable technique for the degradation of halogenated bisphenol compounds is developed. Overall, the photocatalytic degradation of organic pollutants in water utilizing polymetallic composites as catalysts represents an innovative approach to water treatment, demonstrating enhanced catalytic activity and recyclability, with promising prospects for significant advancements in both theoretical research and practical applications.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）