Carbon Letters
·
2023
·Vol. 33
·期 2
·573-585
·
IF 4.5
Zhu Wenjun,Zuo Xiaohua,Deng Xiangyi,Zhang Xinhao,Yao Chuang,Wang Xiaobo
Core–shell ZIFs wrapped CuO hybrid materials (CuO@ZIF-67(Co)) were designed, synthesized, characterized, and employed as peroxymonosulfate (PMS) activators to degrade methylene blue (MB). It demonstrated outstanding catalytic activity on account of the unique structure and the synergistic effect between CuO cores and ZIF-67(Co) shells, resulting in complete degradation of MB (10 mg/L) in 1 min. Reactive oxygen species (ROSs) research showed that both SO 4 − and OH were responsible for the removal of MB. The synergistic activation mechanisms in the CuO@ZIF-67(Co)/PMS system were investigated, which mainly involved the effective electron transfer of CuO and ZIF-67(Co) for accelerating the cycle of Cu II /Cu I and Co III /Co II . This study broadens the application of MOF-derived materials for wastewater treatment.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 31
·10662-10671
·
IF 4
Dan Wen,Yan Ma,Guomei Mu,Qiuping Huang,Xuefeng Luo,Dunmin Lin,Chenggang Xu,Fengyu Xie,Guangzhao Wang,Wenhan Guo
Improving the efficiency of the anodic oxygen evolution reaction (OER) is important to solve the global energy crisis and greenhouse gas emission problems. In this paper, a preparation method for a MIL-53(Fe)@ZIF-67(Co) composite electrode is proposed. The hierarchical structure formed by the combination of MIL-53(Fe) and ZIF-67(Co) provides a rich channel for the transport of electrons and mass in the OER process. XPS analysis and DFT calculations revealed that Fe electrons in MIL-53(Fe) were transferred to Co in ZIF-67(Co) through O, which confirmed the rapid charge transfer effect of this transport channel. The MIL-53(Fe)@ZIF-67(Co) electrode has significant OER performance. When the current density reaches 10 mA cm−2, the overpotential is only 193 mV. This study inaugurates a new way for the rational design of a multiphase interface and the construction of new MOF channel structures.
研究领域:
材料科学
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电化学
·
能源材料
·
催化
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Shuang Liu,Chao Liu,Hejiao Zhang,Weizhen Zhang,Wei Ding,Huaili Zheng,Hong Li
The sulfite (S(IV))-based advanced oxidation process (AOP) has emerged as an appealing alternative to the traditional persulfate-based AOP for the elimination of organic contaminants from diverse water matrices. In this work, a silica reinforced ZIF-67(Co) catalyst (CZS) is fabricated, characterized and tested in the activation of S(IV) for the sulfamethoxazole (SMX) degradation. The prepared CZS demonstrates superior stability and catalytic ability for the degradation of SMX compared to ZIF-67(Co) across a broad pH range. Unlike the conventional radical-dominated oxidation systems, the CZS/S(IV) system for SMX degradation operates through a non-radical mechanism, featuring high-valent Co(IV) and singlet oxygen ( 1 O 2 ) as the predominated reactive species. The hydroxylated Co species exposed on the CZS surface is identified as the pivotal active site, realizing the S(IV) activation through a complexation-electron transfer process, resulting in the production of various reactive intermediates. Co(II) undergoes the conversion to Co(IV) by generated HSO 5 − , and 1 O 2 predominantly originates from the intermediate SO 4 •− . Profiting from the highly selective oxidation capacities of Co(IV) and 1 O 2 , the established oxidative system demonstrates a remarkable interference resistance and exhibits an exceptional decontamination performance under real-world water conditions. In short, this work provides a sustainable S(IV)-based oxidation strategy for environmental remediation via non-radical mechanism.
研究领域:
环境科学
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催化化学
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水处理技术
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DOI
PubMed
高影响因子
ACS Applied Engineering Materials
·
2025
·
IF 3.5
Yihan Zhang,Yiliyasi Baikeli,Zehong Gao,Longyi Chen
Development of polysaccharide biomass for efficient electrocatalytic sensing applications is important for its natural resource utilization and detection application. Elaeagnus angustifolia L. gum is chosen as an electron-rich macromolecule of polysaccharide as the encapsulating agent to surround etched parted ZIF-67(Co) particles. The three electron-rich molecules trithiocyanuric acid, urea, and sodium hypophosphite are selected as the weak acid etching agents, which could etch ZIF-67(Co) microcubes. This fragmentation of ZIF-67(Co) is attributed to the electron-rich molecules disrupting the internal coordination bonds of ZIF-67(Co), thus producing fragmented particles with increased exposed active electrocatalytic spots. Further carbonization of the mixture is processed to obtain the electrocatalyst ZIF-67(Co)-NPS-doped biomass carbon (ZNBC). The ZNBC/GCE sensor shows a significant improvement in electrochemical performance with a linear range of 0.5 to 100 μM, a sensitivity of 10.04 μA μM–1 cm–2, a limit of detection of 0.052 μM, and good selectivity. The ZNBC/GCE sensor was also used in rapid and accurate electrochemical sensing of APAP in urine, lake water, and pharmaceutical capsule preparation samples with good recoveries. This electron-rich macromolecule/molecule as an encapsulating/etching combo strategy provides insight into the usage of Elaeagnus angustifolia L. gum and top-down design of metal–organic frameworks (MOFs) for potential applications in electrocatalyst design.
研究领域:
电化学
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材料科学
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分析化学
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纳米技术
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环境监测
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药物分析
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产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Zhuo Chen,Ze Zhang,Rongxin Xia,Junhu Zhou,Jun Cheng
To improve the conversion rate of carbon dioxide (CO2) to methane (CH4) in a microbial electrochemical system (MES), the zeolitic imidazolate framework ZIF-67(Co) with electron storage properties was first grown in situ on MIL-100(Fe) with excellent CO2 adsorption properties by a hydrothermal method. The obtained binary core–shell MIL@ZIF material was then adsorbed by carbon felt on a cathode to grow biofilms composed of electroactive microorganisms for characterization and testing in an MES. This system exhibited a CH4 production rate of 0.42 mmol LR–1 d–1, along with an impressive faradaic efficiency of 96.4%. Three-dimensional excitation–emission matrix spectra of extracellular polymeric substances indicated that those containing higher contents of humic acid shifted electron pairs and converted redox states to facilitate electron transfer. MIL@ZIF enriched hydrogenotrophic methanogens and electrogenic bacteria in microbial communities with enhanced gene expression of electrically conductive pili and cytochrome C to strengthen interspecies electron transfer. MIL@ZIF enhanced CO2 adsorption and electron storage, reinforcing electron transfer chains and boosting CH4 yield by a factor of 10.7.
研究领域:
环境科学
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微生物学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jie Jiang,Wei Song,Meng Zhang,Yu Feng,Hecheng Bai,Hong Zhang,Kai Yu,Guangfeng Kan,Boyan Liu,Yanxiao Jiang
In this work, magnetic nitrogen-doped carbon composites decorated with carbon nanotubes (CNT/Co@N–C) were successfully prepared by carbonizing ZIF-67(Co) and melamine with a ZIF-67(Co)/melamine material synthesized in situ at 525 °C under an inert atmosphere. To improve the malachite green removal performance of the adsorbent, calcination temperatures and mass ratios of the ZIF-67(Co)/melamine-derived CNT/Co@N–C materials were optimized. The malachite green removal performance was evaluated based on various experimental parameters including adsorbent dosage, pH, contact time, and salinity. The results showed that pH and salinity had a small effect on the adsorption process of CNT/Co@N–C materials, thus providing a possibility for practical application in water purification. The adsorption of malachite green onto the CNT/Co@N–C material was consistent with the Langmuir isothermal model and the pseudo-second-order model, and the maximum malachite green adsorption of the material was 3881.30 mg/g. The results also suggested that the adsorption was a monolayer chemisorption process that occurred through electrostatic and π–π stacking interactions. Finally, the recyclability, magnetic properties, high adsorption performance, and high stability of CNT/Co@N–C materials suggest that the materials are a promising adsorbent that can be employed in the removal of malachite green. The present work provides an idea for the synthesis of magnetic carbon nanotubes modified with nitrogen-doped carbon materials derived from metal–organic frameworks (MOFs).
研究领域:
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
Separations
·
2022
·Vol. 9
·期 11
·340
·
IF 3.344
Zhimin Cai,Yutao Luo,Lu Gan
Herein, we loaded cobalt-based zeolite imidazolate frameworks, ZIF-67 (Co), onto commercial filter paper to prepare catalytic filter paper (ZFP) for the in situ degradation of bisphenol A (BPA) in water by activating peroxymonosulfate. The results showed that ZIF-67 (Co) was densely and uniformly distributed on the surface of the filter paper. The prepared ZFP could effectively degrade BPA in situ through a gravity-driven filtration process. Specifically, when the flow rate of the BPA solution passing through ZFP was lower than 10 mL/min, 0.02 mM of BPA could be completely degraded by ZFP. Furthermore, ZFP showed promising water matrix adaptability, which could provide promising BPA degradation efficiency in a wide pH range or in the existence of multiple anions. The scavenging tests demonstrated that both sulfate radical and hydroxyl radical were generated for BPA degradation, in which hydroxyl radical was the dominant active species. The ZFP also exhibited promising long-time use stability with a high mineralization rate. This study provides a novel method to prepare high-efficient catalyst paper for the in situ organic pollutant removal in water media via a prompt filtration process.Keywords:peroxymonosulfate;degradation;catalytic filter paper;zeolite imidazolate frameworks
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
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 42
·425601
·
IF 3.953
Wenwu Jiang,Yi Han,Yanhuai Ding
Electrospun PAN/PVdF-HFP membranes have the potential to be used as separators for Li-ion batteries owing to their good mechanical properties and high chemical stability. However, the application of PAN/PVdF-HFP separators has been hampered by their poor electrochemical performances. In this study, semi-aligned PAN/PVdF-HFP nanofiber separators have been fabricated by an electrospinning technology. Sepiolite and ZIF-67 co-modification was employed to enhance the physical properties of the PAN/PVdF-HFP separators. The test cells with the as-prepared composite separator showed better electrochemical performance than the commercial and raw PAN/PVdF-HFP separators.
研究领域:
材料科学
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能源存储
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纳米技术
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电化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xue Bai,Li-Ping Liu,Yi-Fei Xu,Yu Sun,Wan-Hong Sun,Zhe-Peng Deng,Yin-Xia Sun,Li Xu
Photocatalytic nitrogen reduction reaction (PNRR) provides a sustainable pathway for green ammonia synthesis, but still faces challenges such as high photogenerated carrier complexation rate and difficulty in N 2 activation. In this study, ZIF-67@Co-TCTB (ZC-250) MOF-on-MOF composites were prepared by liquid-phase synthesis, aiming at dual active site synergy and interfacial charge behavior modulation to enhance visible light nitrogen fixation performance. Structural and compositional analyses (FT-IR, XRD and XPS) indicate that the composite possesses both Co–N and Co–O coordination environments, and introduces N–Co and C O active sites on the surface, which effectively enhances the N 2 adsorption and activation capacity. Diffuse reflectance spectroscopy (DRS), Mott–Schottky (M–S) and steady-state photoluminescence (PL) characterization revealed that the photogenerated electrons migrated from ZIF-67 to Co-TCTB, which facilitated the interfacial charge separation, and then efficiently reduced the surface adsorbed N 2 to NH 4 + . Under the condition of no sacrificial agent, the NH 4 + yield of ZC-250 was as high as 199.73 μmol g −1 h −1 , which was an 8-fold enhancement over that of pure ZIF-67, and showed good stability after four cycles. This study provides a new material design strategy for the construction of MOF-based nitrogen fixation photocatalysts with synergistic active centers and regulated interfacial electronic behavior.
研究领域:
光催化
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材料科学
·
固氮
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金属有机框架材料（MOFs）
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可持续能源
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 20
·4860
·
IF 4.2
Fuyan Zhang,Miaomiao Ma,Shuang Li,Yuting Zhou,Jian Zeng,Meiqi Huang,Qi Sun,Tao Le
In the critical domain of wastewater treatment, the development of cost-effective, durable, and recyclable adsorbents with high adsorption capacities remains a significant challenge. This study introduces a novel magnetic bimetallic Metal–Organic Framework (MOF) adsorbent, MZIF-67-Co/Cu, doped with copper ions. The MZIF-67-Co/Cu adsorbent was successfully synthesized and structurally characterized, demonstrating remarkable selectivity for removing methyl orange (MO) from water. This high selectivity is attributed to the adsorbent’s high porosity and Lewis base properties at the coordinating metal ion center. The incorporation of Cu ions significantly enhances the porous architecture and increases the number of metal adsorption sites, leading to an impressive maximum MO adsorption capacity of 39.02 mg/g under optimized conditions (0.5 g/L adsorbent concentration, pH 3.0, 250 rpm agitation speed, adsorption time > 10 min). The adsorption kinetics closely follow the pseudo-second-order model, and the isotherm data fit well with the Langmuir model. The primary adsorption mechanisms involve electrostatic attraction and mesoporous interaction. This study highlights MZIF-67-Co/Cu as a highly efficient adsorbent with magnetic recovery capabilities, positioning it as a promising candidate for addressing critical issues in wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhao-Xing Yan,Ling-Xi Zhao,Ning Liu,Na Li,Ru-Song Zhao
Non-steroidal anti-inflammatory drugs (NSAIDs) have gained significant attention as emerging pollutants and are increasingly detected in aquatic environments. Therefore, it is imperative to investigate the efficient removal of NSAIDs from water systems. In this study, a magnetic LDH with three-dimensional hollow structure (Fe 3 O 4 @ZIF-67@Co-Ni LDH) was synthesized using ZIF-67 as a template for the removal of carprofen (CPF) and flurbiprofen (FLU) from water environments. The adsorption process of CPF and FLU on Fe 3 O 4 @ZIF-67@Co-Ni LDH and the competitive adsorption between these two NSAIDs were investigated. The adsorption mechanism was explored by experimental analysis and theoretical calculation. Results demonstrated that the pseudo-second-order kinetic model and Liu isotherm model can better fit the kinetic and isotherm data, and according to the thermodynamic data analysis, the adsorption process was exothermic, spontaneous and stable. The adsorption capacity of CPF and FLU on Fe 3 O 4 @ZIF-67@Co-Ni LDH can reach 856.2 mg/g and 797.5 mg/g. Fe 3 O 4 @ZIF-67@Co-Ni LDH exhibited high adsorption capacity for CPF and FLU in actual environment water, with stronger affinity towards CPF when both NSAIDs coexisted simultaneously. The three-dimensional hollow structure enhanced the adsorption capacity of Fe 3 O 4 @ZIF-67@Co-Ni LDH, making it a promising adsorbent for NSAIDs.
研究领域:
环境科学
·
水处理
·
材料科学
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产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 31
·13463-13472
·
IF 7.79
Ya-Nan Zhou,Ruo-Yao Fan,Yu-Ning Cao,Hui-Ying Wang,Bin Dong,Hui-Ying Zhao,Fu-Li Wang,Jian-Feng Yu,Yong-Ming Chai
The oriented distribution and strong bonding of Fe active sites in multiple metal hydroxides are crucial to modulate activity and stability for efficient oxygen evolution reaction (OER). However, the dispersion and inevitable dissolution of Fe species still need to be addressed through deliberate design. Here, trace amounts of Fe chelated with tannic acid (TA) are precisely anchored to ultrathin Co hydroxides (TF@Co(OH)2-t) through a new anodic interfacial coordination assembly strategy: firstly, the ZIF-67@Co(OH)2 precursor with ultrathin Co(OH)2 nanosheets vertically grown on the shell, provides abundant active sites and sufficient anchoring regions for subsequent TA–Fe coating; secondly, the TA–Fe ligand network quickly and robustly coats the surface of the Co(OH)2via positive potential-driven chronopotentiometry, yielding TF@Co(OH)2-t with good dispersion and controllable Fe species. The TA–Fe network efficiently activates Co species and prevents the dissolution of Fe ions. Physical characterization and DFT simulations reveal that the optimized OER activity with 317 mV at 10 mA cm−2 for TF@Co(OH)2-500 can be attributed to the accelerated electron transfer, increased active sites, and the moderate fall in d-band center levels due to Fe integration. Moreover, prolonged stability is realized benefiting from the robust TA–Fe coating protecting the actives sites.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）