Nanomaterials
·
2024
·Vol. 14
·期 17
·1445
·
IF 4.4
Jingchao Zhang,Yingping Bu,Zhuoyan Li,Ting Yang,Naihui Zhao,Guanghui Wu,Fujing Zhao,Renchun Zhang,Daojun Zhang
Oxygen evolution reaction (OER) is a critical half-reaction in electrochemical overall water splitting and metal–air battery fields; however, the exploitation of the high activity of non-noble metal electrocatalysts to promote the intrinsic slow kinetics of OER is a vital and urgent research topic. Herein, Fe-doped Ni3S2arrays were derived from MOF precursors and directly grown on nickel foam via the traditional solvothermal way. The arrays integrated into nickel foam can be used as self-supported electrodes directly without any adhesive. Due to the synergistic effect of Fe and Ni elements in the Ni3S2structure, the optimized Fe2.3%-Ni3S2/NF electrode delivers excellent OER activity in an alkaline medium. The optimized electrode only requires a small overpotential of 233 mV to reach the current density of 10 mA cm−2, and the catalytic activity of the electrode can surpass several related electrodes reported in the literature. In addition, the long-term stability of the Fe2.3%-Ni3S2/NF electrode showed no significant attenuation after 12 h of testing at a current density of 50 mA cm−2. The introduction of Fe ions could modulate the electrical conductivity and morphology of the Ni3S2structure and thus provide a high electrochemically active area, fast reaction sites, and charge transfer rate for OER activity.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Lu Yan,Liu Qingcui,Pang Xinxin,Tang Chenyang,Yan Zihan,Peng Banghua,Yu Feng
Ultrathin two-dimensional (2D) metal–organic framework (MOF) materials have become a research hotspot due to their ultra-large specific surface area and efficient charge transport, but their controllable preparation is still challenging. In this study, using molybdate anion, a small molecular modulation strategy is offered to precisely modulate the structure of cobalt-imidazolium MOF by liquid-phase reaction to successfully obtain ultrathin 2D MoCo-MOF shreds. High-valence molybdenum modulates the electronic structure and oxidation state of cobalt in MOFs, which in turn influences the growth of crystalline and morphology, leading to ultrathin MoCo-MOF structure. Synergism for molybdenum and cobalt in MoCo-MOF significantly enhanced the electrocatalytic activity of oxygen evolution reaction (OER) in 1M KOH. Meanwhile, the material also exhibited excellent uric acid (UA) detection performance with high sensitivity and wide detection range (4–800 μM). Our study verifies the effectiveness of oxometallate anion for structural modulation, provides a new way for material morphology modulation, and develops the potential of ultrathin 2D MoCo-MOF shreds for water electrolysis and UA detection.
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Food Chemistry-X
·
2024
·
IF 6.5
Yi Xia,Juan He,Long Tang,Miao Hu,Jie Zhou,Yao-Yu Xiao,Zhi-Chao Jiang,Xue Jiang
The assessment of total antioxidant capacity (TAC) is crucial for evaluating overall antioxidant potential, predicting the risk of chronic diseases, guiding dietary and nutritional interventions, and studying the effectiveness of antioxidants. However, achieving rapid TAC assessment with high sensitivity and stability remains a challenge. In this study, Ce/Fe-MOF with abundant oxygen vacancies was synthesized using microplasma for TAC determination. The microplasma synthesis method was rapid (30 min) and cost-effective. The presence of oxygen vacancies and the collaboration between iron and cerium in Ce/Fe-MOF not only enhanced the catalyst's efficiency but also conferred multiple enzyme-like properties: peroxidase-like, oxidase-like, and superoxide dismutase mimetic activities. Consequently, a simple colorimetric assay was established for TAC determination in vegetables and fruits, featuring a short analysis time of 15 min, a good linear range of 5–60 μM, a low detection limit of 1.3 μM and a good recovery of 91 %-107 %. This method holds promise for rapid TAC assessment in agricultural products.
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Materials Today Chemistry
·
2025
·
IF 6.7
Jiaxu Zhao,Weilong Du,Dan Su,Xiaoyan He,Xiuqin Bai
Biofilms attached to various surfaces can lead to significant adverse effects in multiple areas. Cerium metal-organic framework (Ce-MOF) can function as haloperoxidase; however, their initial activity is relatively low. This study proposes a post-treatment method to enhance their enzymatic activity through the oxidation of the initial Ce-MOF. The research elucidates the haloperoxidase activity and anti-biofilm properties of Ce-MOFs. The synthesized Ce-MOFs exhibit a nanorod structure. The oxidized Ce-MOFs demonstrate substantial haloperoxidase activity, even in an alkaline environment. Both the initial and oxidized Ce-MOFs demonstrate exceptional antibacterial properties, with a concentration of 50 mg/L effectively eliminating bacteria within 30 min. The oxidized Ce-MOFs benefit from improved haloperoxidase activity, resulting in a significantly enhanced ability to inhibit biofilm formation and, consequently, improved anti-biofilm performance. This research offers methods for regulating the haloperoxidase activity of Ce-MOFs for marine antifouling applications.
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DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Tianyu Shen,Yuanxinyi Zhou,Dong Wu,Hongyu He,Aijuan Xie,Shiping Luo
In this study, a rapid and sensitive electrochemical sensor (ZnCo 2 O 4 @NC) based on metal-organic frame (MOF)-derived metal oxide material (ZnCo 2 O 4 ) and chitosan derived nitrogen-doped carbon material (NC) was successfully constructed for the simultaneous determination of acetaminophen (APAP) and p-aminophenol (PAP). A series of electrochemical experiments proved that the MOF derived ZnCo 2 O 4 @NC composite has excellent electrochemical response to APAP and PAP in the phosphate buffer saline (PBS) (pH 7.0). The current response varies linearly with the increase of APAP concentration in the range of 8.0 μmol L −1 to 520 μmol L −1 and PAP concentration in the range of 6.0 μmol L −1 to 420 μmol L −1 . The sensitivity and limit of detection (LOD) of ZnCo 2 O 4 @NC for APAP and PAP detection are 0.1024 and 0.2749 μA μmol L −1 cm −2 , 0.0608 and 0.2489 μmol L −1 , respectively. The ZnCo 2 O 4 @NC composite modified electrode exhibits good selectivity, reproducibility and stability. Additionally, in the detection for acetaminophen sustained-release tablets, the recovery rates of APAP are in the range of 90.00 % –100.00 %. The theoretical content is consistent with our detection results, showing that this method has good accuracy in actual sample analysis. This study provides an innovative idea to improve electrochemical performance of simultaneous detection of acetaminophen and p-aminophenol through the comprehensive strategy of structural design, heteroatom doping.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-19
·
IF 12.6
Chen Lihua,Yang Jiaying,Jia Lingyu,Wei Xiaolu,Wang Huijun,Liu Zhuo,Jiang Shan,Li Pengyue,Zhou Yanyan,Wang Hongjie,Si Nan,Bian Baolin,Zhao Qinghe,Zhao Haiyu
Bioenergetic therapy based on tumor glucose metabolism is emerging as a promising therapeutic modality. To overcome the poor bioavailability and toxicity of arenobufagin (ArBu), a MOF-derived intelligent nanosystem, ZIAMH, was designed to facilitate energy deprivation by simultaneous interventions of glycolysis, OXPHOS and TCA cycle. Herein, zeolitic imidazolate framework-8 was loaded with ArBu and indocyanine green, encapsulated within metal–phenolic networks for chemodynamic therapy and hyaluronic acid modification for tumor targeting. ZIAMH nanoparticles can release ArBu in the tumor microenvironment for chemtherapy, and ICG enables photothermal therapy under near-infrared laser irradiation. In vitro and in vivo mechanism studies revealed that the ZIAMH nanoplatform downregulated glucose metabolism related genes, resulting in the reduction of energy substances and metabolites in tumors. Additionally, it significantly promoted cell apoptosis by upregulating pro-apoptotic proteins such as Bax, Bax/Bcl-2, cytochrome C. Animal studies have shown that the tumor inhibition efficiency of ZIAMH nanomedicines was three fold higher than that of free drugs. Therefore, this study provides a new strategy for glucose metabolism-mediated bioenergetic therapy and PTT/CDT/CT combined therapy for tumors.Graphical
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DESALINATION
·
2024
·
IF 8.3
Jiapeng Wang,Hua-Bin Yuan,Yongxuan Xiang,Lili Xing,Xinpeng Chen,Yifeng Wang,Jiazhuang Chen,Guoqiang Chen,Tieling Xing
Oxygen evolution reaction (OER), as a half-reaction of water decomposition, has a high theoretical overpotential. Therefore, the development of electrocatalysts with high OER performance is favorable for electrolytic hydrogen production. In situ growth of nanomaterials on conductive substrates is an effective strategy for the preparation of electrocatalysts. In this work, we grew Ni/Co bimetallic metal-organic framework (MOF) on carbon cloth substrates and successfully constructed a robust NiCo 2 S 4 /FeS@CC electrocatalyst through a MOF derivatization strategy. This electrocatalyst can be used for efficient and robust OER performance. MOF-derived NiCo 2 S 4 /FeS has the advantage of a porous heterostructure and multicomponent with many active sites and faster charge transfer rate, while sulfur doping greatly improves the OER performance. The current density of this self-supported heterogeneous material in alkaline freshwater reaches up to 10 mA cm −2 with an overpotential of only 238 mV. NiCo 2 S 4 /FeS@CC exhibited good OER performance in alkaline brine with an overpotential of only 241 mV at 10 mA cm −2 . We speculate that this is due to the generation of a negatively charged SO 4 2− anionic layer on the catalyst surface during the electrooxidation process, which effectively avoids Cl − corrosion. And both conditions demonstrate excellent long time stability. Additionally, we succeeded in further reducing the onset potential and energy consumption by adding ethanol or methanol to the electrolyte. This work provides an effective method to improve the OER performance of MOF-derived transition metal electrocatalysts for hydrogen production from electrolytic water.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yuting Hu,Minghu Zhao,Bo Du,Ting Cheng,Zhaozhong Jiang,Kai Qin,Chengzhu Zhu
A series of M-MnCeO X catalysts using MOF (Metal-organic Framework) were prepared to apply for NH 3 -SCR (Selective Catalytic Reduction) of NO X . The effects of Mn/Ce molar ratio, calcination temperature and its activity including catalytic activity, H 2 O/SO 2 resistance and stability were systematically investigated. The results showed that under the Mn/Ce molar ratio of 1 and calcination temperature of 400 ℃, the catalyst exhibited excellent catalytic activity, H 2 O/SO 2 resistance, and stability. When the concentration of NO was 500 ppm, the gas spatiotemporal velocity (GHSV) was 36,000 h −1 , and the reaction temperature was 100 ℃, the NO conversion efficiency of M-MnCeO X exceeded 90.0 %. Added 200 ppm SO 2 and 3 vol% H 2 O simultaneously, the NO conversion efficiency was close to 80.0 %. By analyzing the physicochemical properties of the catalyst, M-MnCeO X had a large specific surface area, numerous acidic sites, and excellent redox properties. According to density functional theory (DFT), the NH 3 /NO adsorption energy of M-MnCeO X were −2.35 and −2.40 eV, exhibiting lower than a single MOF-derivative, promoting the adsorption of NH 3 or NO. The reaction mechanism on the M-MnCeO X catalyst followed the E-R and L-H mechanisms by In situ DRIFTS.
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Food Chemistry-X
·
2025
·
IF 8.2
Xiang-Yi He,Ya Wang,Qin Xue,Wan-Fen Qian,Guang-Li Li,Qing Li
Reliable and accurate determination of chloramphenicol (CAP) is urgently needed due to its significant implications for food safety and human health concerns. In this study, we successfully synthesized MIL-101(Fe)-NH 2 @MIP, which exhibits peroxidase activity and a specific recognition function for CAP, through in situ polymerization of dopamine on the surface of MIL-101(Fe)-NH 2 , utilizing molecular imprinting technology. Our bifunctional MIL-101(Fe)-NH 2 @MIP probe offers a ratiometric fluorescent and colorimetric dual-mode sensing strategy for sensitive and selective detection of chloramphenicol. The detection limits for CAP can reach down to 36.45 nM and 93.38 nM, respectively. Furthermore, we developed a smartphone-based visual sensing platform that employs MIL-101(Fe)-NH 2 @MIP nanozymes for rapid, portable, low-cost on-site detection of CAP. Successful spike recovery experiments conducted in fresh milk samples further validate the potential practical application of our proposed dual-mode strategy. Thus, this approach expands the applications of MOFs-based nanozymes and holds promise for antibiotic determination.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yongwei Chen,Houxiao Wu,Zewei Liu,Xuejiao Sun,Qibin Xia,Zhong Li
Mechanochemical synthesis, driven the chemical transformation by mechanical force, has been a rapid and efficient strategy to prepare metal–organic frameworks (MOFs). In this work, a liquid-assisted mechanochemical method has been successfully applied to the synthesis of copper based MOF-505. The crystallinity and porosity of MOF-505 were investigated by adjusting the synthesis parameters, such as added solvent (type and amount) and grinding time. Results showed that the type and amount of added solvent were crucial parameters for the mechanochemical synthesis of MOF-505. Furthermore, the optimizations of MOF-505 synthesis were carried out: grinding Cu(OAc)2·H2O and H4bptc as starting materials for 80 min with 0.4 mL of DMF assisted, giving MOF-505-K with Brunauer–Emmett–Teller (BET) surface area of 977 m2/g. Meanwhile, MOF-505-K had moderate CO2 adsorption capacity of 2.01 mmol/g at 298 K and 100 kPa. The adsorptive selectivity determined from ideal adsorbed solution theory (IAST) indicated that MOF-505-K had high CO2/N2 and CO2/CH4 selectivities (26.6 and 5.5) at 298 K. Highly efficient mechanochemical synthesis of MOF-505 provides the promise to facilitate the industrial application of CO2 capture.
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Catalysts
·
2025
·Vol. 15
·期 1
·69
·
IF 4
Yuning Liang,Baohui Wang,Tao Cheng,Mingchun Bi,Weimeng Chi,Yuxi Liu,Wenjing Zhang,Yuxuan Liu
A novel dual Z-scheme heterojunction photocatalyst was constructed by introducing the narrow-bandgap semiconductor CuInS2(CIS) into the dual metal-organic framework (MOF) system of UiO-66(Zr) and NH2-MIL-101(Fe). This structure effectively overcomes the limitations of conventional photocatalysts in terms of light absorption range and the separation efficiency of photogenerated charge carriers. The prepared ternary catalyst, (UiO-66(Zr))-(NH2-MIL-101(Fe))/CuInS2, exhibited excellent photocatalytic performance under visible light irradiation, achieving a hydrogen production rate of 888 μmol g−1h−1and a methylene blue (MB) degradation efficiency of up to 95.03%. The significant enhancement in performance is attributed to the material’s porous structure, extended light absorption range, and optimized electron transfer pathways. Additionally, the construction of the dual Z-scheme heterojunction further promotes the separation and migration of photogenerated charge carriers, suppressing electron–hole recombination. This study demonstrates the great potential of dual Z-scheme heterojunctions in improving photocatalytic efficiency and provides an important theoretical foundation and design strategy for the development of efficient photocatalysts.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Shumin Lin,Xiaoyu Zhang,Xiliang Li,Shu-xuan Liang
Residues of fluoroquinolones (FQs) have been identified as a threat to food safety, highlighting the need for effective detection methods in food samples. This study utilized a hydrothermal synthesis method to create Al-based metal-organic framework (Al-MOF) for pipette-tip solid-phase extraction of FQs in food matrices. Coupled with HPLC-FLD, a novel sample pretreatment method for simultaneous detection of three FQs was developed, demonstrating good linearity (1−500 ng/g) with R 2 values ranging from 0.9990 to 0.9998. Limits of detection and quantification were found to be 0.15−0.25 ng/g and 1.0−2.0 ng/g, respectively, with the relative standard deviations below 9.3 %. The extraction method showed promising results in animal liver and kidney samples, with a recovery rate of 75.2−103.6 %. Overall, this simple, rapid, and efficient method offers a valuable approach for analyzing trace levels of FQs in complex matrices.
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