COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Ming Yang,Qianhui Bai
Water pollution has become a great problem and aroused worldwide concern. As a new class of materials, metal-organic frameworks (MOFs) exhibit significant potential for wastewater treatment due to their high surface area, porosity, stability and tunability. In this work, flower-like hierarchical Ni-Zn MOF microspheres were synthesized via a facile solvothermal method. The mole ratio of Ni to Zn had a great influence on the morphology and microstructure of the final products. With the increase mole ratio of Zn to Ni, the morphology of MOFs gradually changed from spheroidal structure to rod-like structure. Using the Congo red (CR) experiment to evaluate the adsorption performance, Ni-Zn MOF displayed superior adsorption capacity towards CR (460.90 mg g −1 ), compared with Ni MOF (276.70 mg g −1 ) and Zn MOF (132.20 mg g −1 ). Besides the tuned morphology and pore structure, electron transferring from Zn species to Ni species would also favor the physicochemical adsorption of Ni-Zn MOF towards CR.
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Journal of Energy Storage
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2025
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IF 9.8
Fuyu Chen,Zhongjie Wang,Xuhong Yin,Xiangdong Cheng,Qiang He,Hui Chen,Qinfang Zhang
The vanadium flow battery (VFB) has garnered significant attention for its potential to enable cost-effective utilization in large-scale energy storage. Nevertheless, the electrochemical activity of electrodes is limited during vanadium redox reactions, which poses a challenge to achieving high-performance VFBs. To address this, we synthesize a catalyst consisting of amorphous carbon, manganese oxide, and cobalt, to enhance VFB performance. Initially, bimetallic metal-organic frameworks with varying Mn Co ratios are synthesized using a hydrothermal method. Subsequently, the bimetallic metal-organic frameworks are carbonized to form the catalysts. The morphology, composition, electrocatalytic activity, and charging-discharging behavior of the prepared catalysts are then systematically investigated. This paper reveals that: i) the composite with a molar ratio of manganese to cobalt of 1:4, exhibits a uniform and fine particle distribution, an abundance of oxygen-containing functional groups, and exceptional electrochemical activities; ii) it enhances the energy efficiency of VFBs by 9 % compared to those utilizing raw carbon felts and by 5 % over those with mono-MnO@C or mono-Co@C electrodes at 100 mA cm −2 ; iii) it offers significant improvements in terms of operating voltages, cell capacities, high current density characteristics, and lifespan. Consequently, this work introduces a novel electrochemical catalyst for VFBs, enhancing their performance and broadening their potential applications.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Xiaoyan Pei,Wangyue Song,Yunlei Shi,Yang Zhao,Zhiyong Li
Pickering emulsions with a stimulus response have been paid extensive concern due to their long-term stability and demulsification on-command. Metal-organic frameworks (MOFs) are expectable emulsifying agents to build Pickering emulsions based on their excellent properties such as high specific surface area, adjustable porosity and pore size. Herein, a novel kind of CO 2 -triggered Pickering emulsions formed by (3-aminopropyl)triethoxysilane (APTES)-functionalized M-MOF-74 (M-MOF-74-APTES, M = Zn, Cu or Mg) has been developed for the first time. It was found that even at the M-MOF-74-APTES amount of 0.5 wt%, the functionalized MOFs could still stabilize the n-hexane-water mixture to construct Pickering emulsions. The as-generated Pickering emulsions could be efficiently demulsified upon bubbling of CO 2 , resulting in complete separation of oil and water phases, but could be restored by subsequent N 2 bubbling under homogenization. Mechanism study indicated that the acid-base reaction of CO 2 with the amino group of M-MOF-74-APTES resulted in the creation of hydrophilic salts, which led to the lowering of particle wettability and broke the stability of the emulsion, causing demulsification of the Pickering emulsion. After removing CO 2 , the emulsion can be reconstructed by the reversible reaction. As an applied example, the Pickering emulsion has been availed as a micro-reaction system and M-MOF-74-APTES as a carrier of Pd(OAc) 2 catalyst to realize the efficient combination of Suzuki-Miyaura reaction, product isolation and reuse of catalysts via alternate bubbling or removing of CO 2 .
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Qian Wang,Changchao Zhou,Li Shen,Eryue Song,Yu Yang,Haiqian Lian,Rujing Hou,Yichang Pan
The pervaporation (PV) technology is attractive for azeotrope component separation of the MeOH/MTBE mixture due to the reduced energy and cost relative to the traditional ternary distillation process. However, the membrane separation performance is largely affected by its microstructure including pore size and shape as well as its surface properties such as hydrophilicity. Herein, we report a Co-gallate MOF membrane that features preferential adsorption and diffusion of methanol (MeOH) relative to the methyl tert -butyl ether (MTBE) molecules during the PV separation process. The high-quality Co-gallate MOF membrane has been prepared by introducing a regulator of KOH. The MeOH flux of the Co-gallate MOF membrane was 0.565 kg m −2 h −1 and the separation factor was up to 721 at 15 wt% MeOH/MTBE feed composition. It is worth noting that the separation performance exceeds most of the reported membrane materials for MeOH/MTBE separation in the PV process. Furthermore, the separation performance of the Co-gallate MOF membrane for MeOH/MTBE mixtures remained almost unchanged over 70 h, indicating the reliable long-term stability of the membrane. Thus, the Co-gallate MOF membrane demonstrated a potential practical application for MeOH/MTBE separation.
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JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Deyu Qin,Boyang Zhou,Zhifang Li,Changlong Yang
Supercapacitors, as new electrochemical energy storage (EES) devices, with the lower energy density seriously hinder their realization of the requirements for future high energy storage devices. Thus, It is crucial to develop straightforward and efficient approaches to address the aforementioned challenges in future EES devices. In this paper, controllable multi-component composites are designed and ZnO is used as a conductive carrier in preparing layered structured ZnO-Zn/Co-metal-organic framework-polyaniline (ZnO-Zn/Co-MOF-PANI, ZZCMP) electrode materials by solvothermal and electrodeposition methods. The abundant active sites and the high specific surface area of the MOF are used to create the conditions for the loading of PANI, while it can establish an effective ion/electron transport channel with PANI to enhance the material utilisation and the electrochemical performance of the overall material. Add to that, the advantages of flexibility and rigidity of pristine MOF are made use of to provide sufficient space during the process of long-term charging and discharging, thus facilitating resistance to the structural deformation and enhancing the mechanical stability of the material. The optimized integrated electrode ZZCMP-10 exhibits a capacitance of 458.9 F . g − 1 when operated at a current density of 1 A . g − 1 . The asymmetric supercapacitor (ASC) is constructed with ZZCMP-10 as the positive electrode material and active carbon is used as the material for the negative electrode, which shows an energy density of 26 Wh . kg −1 at a current density of 1 A . g − 1 and a retention of 75.3 % capacitance is achieved after 5000 cycles of long-term charging and discharging. This study provides a reasonable exploration for designing high-energy-density electrochemical energy storage devices.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2017
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IF 3.615
Tingting Xu,Xudong Hou,Shengjun Liu,Bo Liu
We demonstrated a facile and efficient method for the preparation of a magnetic and porous Ni@MOF-74(Ni) [Ni 2 (DOBDC), DOBDC = 2, 5-dihydroxyterephthalate] composite by one-step solvothermal reaction of Raney Ni and DOBDC. Ni in the reaction not only acted as the core of the composite, but also provided metal source for the formation of MOF-74(Ni). The Ni@MOF-74(Ni) composite exhibits both magnetic characteristics and high porosity, enabling it an efficient candidate for dye removal and target drug delivery system. The adsorption amount of rhodamine b reached up to 177.8 mg g −1 , and 4.1 mg g −1 for ibuprofen.
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APPLIED ORGANOMETALLIC CHEMISTRY
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2024
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IF 3.7
Jiangyan Song,Yongyi Yu,Ziyi Zhang,Weisen Yang,Wenbin Pan,Shaoju Jian,Shaohua Jiang,Jiapeng Hu
Deposition of excessive phosphate in natural water column caused several issues, like the eutrophication and destruction of aquatic ecosystems. Adsorption has been an effective and convenient method for phosphate elimination. Herein, a novel bimetallic metal–organic framework adsorbent, namely, La-Zr-MOF, was prepared, and the morphology, crystallite, characteristic functional groups, specific surface area, and composite material surfaces were analyzed using XRD, FT-IR, SEM-EDS, and BET. The adsorption performance of the adsorbent was systematically evaluated by batch adsorption experiments, and the adsorption thermodynamic and kinetic properties were analyzed. The results reveal that La-Zr-MOF exhibits a high selectivity and sorption performance for phosphate, and the adsorption of La-Zr-MOF follows the Langmuir and pseudo–second-order models; the phosphate removal procedure is a chemisorption accompanied by an endothermic reaction, and the maximum capacity was 127.7 mg g −1 . Combined with batch adsorption experiments, kinetic and thermodynamic studies and various characterization analyses together revealed the phosphate removal mechanism, mainly ligand exchange and electrostatic interactions.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2024
·Vol. 41
·期 6
·1665-1678
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IF 2.9
Liu Yanyan,Wang Zhiheng,Li Xin,Gao Ruiyao,Sun Jiong,Liu Jiankun,Yao Songdong
To investigate the potential utilization of MOF templates in hydrodesulfurization (HDS) of large sulfur-containing compounds, MOF-derived Ni 2 P was prepared and characterized by XRD, TG, SEM, TEM, XPS and Raman. The findings indicate that MOF-derived Ni 2 P catalyst exhibits significantly enhanced Hydrodesulfurization (HDS) activity compared to conventional unsupported Ni 2 P. A modified pyrolysis and phosphiding condition allowed the stacking of central Ni atoms to be aggregated loosely, and morphology of MOF-derived Ni 2 P can be controllably transmitted from polyhedral to petal-like. A lower pyrolysis temperature tends to reduce density of Ni aggregates and cluster size of Ni 2 P(111), thereby facilitating the phosphiding of Ni aggregates and enhancing the catalytic activity of MOF-derived Ni 2 P in HDS process. Increasing the duration time of pyrolysis at lower temperatures does not accelerate the aggregation of particles, but makes petals on surface of MOF-derived Ni become thinner and eventually disappear, until coral-like nanosphere aggregates with uniform size are formed. The gradually elimination of MOF framework renders nickel aggregates more susceptible to phosphiding. The collapse of pore structure of MOF template can impact HDS activity of MOF-derived Ni 2 P. Prolonging pyrolysis time causes the spacing between Ni 2 P clusters to diminish, thereby significantly decreasing reactivity of Ni 2 P-400-4-275 compared to Ni 2 P-400-2-275 in DBT–HDS.
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Journal of Science-Advanced Materials and Devices
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2024
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IF 6.7
Jiahui Kong,Mengru Cai,Rongyue Zhu,Yongqiang Zhang,Yuji Du,Xiaohong Jing,Yufei Sun,Rongrong Chang,Changhai Qu,Xiaoxu Dong,Jian Ni,Xingbin Yin
ABSTRACT: The annual prevalence of gastric cancer has increased in recent years. Curcumin (CUR) has shown great potential in the treatment of gastric cancer; however, its low bioavailability and poor efficacy hinder its widespread clinical application. Additionally, CUR has been found to be excellent photosensitizer in photodynamic therapy. In this study, the iron-based metal-organic framework Fe Tetrakis (4-carboxyphenyl) porphyrin (Fe-TCPP，FT) was used as a photosensitizer and mononuclear agent. The natural anti-tumor active ingredient CUR was loaded as both a chemotherapeutic agent and photosensitizer to form the nanoparticles CUR@FT (CF). Finally, a cell-penetrating peptide (CPP10) was modified on the surface of the nanoparticles to construct a drug delivery system (named CPP10-PEG@CUR@FT, CCF) that could actively target tumor cells while exerting a synergistic therapeutic effect of chemotherapy and photodynamic therapy. This can improve the efficacy of CUR as a chemotherapeutic drug or photosensitizer, and the high drug load and pH sensitivity of FT nanoparticles provide an excellent carrier for the efficient delivery of CUR. The polyethene glycol (PEG)-conjugated CPP10 (PEG-CPP10) coating allows nanoparticles to specifically target gastric cancer cells, significantly improving the absorption of nanoparticles in vivo and in vitro and improving biosafety. We evaluated the thermal stability, drug loading capacity, and safety of FT as a drug delivery vehicle. We also assessed the in vitro photodynamic performance and toxicity of various nanoparticles and the targeting and biocompatibility of CPP10-PEG@CUR@FT. CPP10-PEG@CUR@FT could specifically target tumor cells, and its effect on killing gastric cancer cells (MKN45) under light was much stronger than that of free CUR. Its toxicity and side effects to other organs and tissues are low, offering good biosafety. The experimental results showed that FT and CUR exerted synergistic effects on photodynamic therapy and chemotherapy. In summary, our novel CUR-loaded targeted nanodrug delivery system offers significant advantages by combining photodynamic therapy and chemotherapy for tumor treatment. This approach introduces a new concept for integrating chemotherapy, photodynamic therapy and targeted drug delivery, potentially providing a new strategy for the clinical treatment of gastric cancer.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
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IF 6.2
Yajun Liu,Yongzhi Xiong,Chenxin Jin,Changzhou Chen,Liangliang Zhang,Jianchun Jiang,Jingcong Xie
Herein, a novel hydrothermal synthesis strategy is proposed for the preparation of novel Cu-Ce MOF heterojunction nano catalysts (CuCeO X /C) for 5-hydroxymethylfurfural (HMF) electrooxidation reaction in this paper. CuCeO X /C exhibits superior catalytic performance, with the current density of CuCeO X /C reaching 100 mA cm −2 at a low potential of 1.408 V vs. RHE, and doubling to 280 mA cm −2 at a lower potential of 1.5 V vs. RHE. Under these conditions, the conversion of HMF reaches 100 %, with a selectivity of over 99.11 % for 2,5-furan dicarboxylic acid (FDCA) and a Faradaic efficiency of 97.76 %. Theoretical calculations and In-situ-EIS have demonstrated that Ce-based Cu-MOF heterojunction nanocatalysts enhance the adsorption energy of the CuCeO X /C catalysts on HMF substrates while also decreasing reaction energy barrier of HMFOR. Based on our work, the employment of CeCu/MOF heterojunction electrocatalysts for efficient electro-oxidation of HMF to FDCA paves a green and sustainable way for advancing sustainable chemical processes and biomass valorization.
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CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Yingyue Wang,Jinyang Huang,Wansheng Tang,Mengying Long,Zongwei Zhang,Hongli Liu,Dongmin An
In this work, an uncomplicated solvothermal method was used to synthesize NiO-SnO 2 gas sensing materials derived from bimetallic MOFs. The influence of MOF derived NiO-SnO 2 with different amount of Ni on the gas sensing performance of triethylamine (TEA) was systematically evaluated. The results showed that the MOF derived 0.5 mol% NiO-SnO 2 based gas sensor exhibited the best gas sensing performance. The response to TEA gas of the sensor reached 124.5 to 50 ppm at 170 °C, which was 1.5 times that of SnO 2 sensor (83). Compared with SnO 2 sensor at 190 °C, its operating temperature was reduced by 20 °C. Moreover, the MOF derived 0.5 mol% NiO-SnO 2 sensor also performed outstanding selectivity towards TEA, with a response that is 3.1–49.8 times higher than other target gases. The MOF derived NiO-SnO 2 nanomaterials were also conducted X-ray photoelectron spectroscopy and UV–visible absorption spectra analysis. The results demonstrated that an increase in specific surface area, abundant oxygen vacancies, a decrease in forbidden bandwidth, and the formation of p-n heterojunctions were significant factors in improving the gas sensing performance of MOF derived NiO-SnO 2 nanomaterials.
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POLYMER
·
2024
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IF 4.1
Ran Liang,Linyu Wang,Youfa Wang,Fan Zhou,Zibo Yang,Yuxiu Sun,Zhenjie Gu,Zhihua Qiao
Methane/nitrogen (CH 4 /N 2 ) separation remains a persistent challenge owing to the similar polarities, kinetic diameters, and boiling points of CH 4 and N 2 . Herein, a novel method is proposed for enhancing the separation performance of CH 4 /N 2 via vacuum resistance calcination, which uses surface-carbonized and hardened ZIF-8 (SCH-Z), MOF-74-Ni (SCH-M), and UiO-66-NH 2 (SCH–U). The nanoparticles treated by vacuum resistance calcination remain the microporous characteristics of MOF, while introducing additional mesoporous structure and unsaturated metal sites. Such multistage pore structure and rich metal sites display a significant improvement in the CH 4 adsorption over N 2 . In addition, the separation performance of multiple metal–organic frameworks (MOFs) mixed matrix membranes (MMMs) fabricated by homogeneously mixing the alkaline polymer polyvinylamine (PVAm) with SCH-M/SCH-Z and SCH-M/SCH–U was investigated, respectively. When the measured pressure was 0.1 MPa and the binary filler loading was 48 %, the PVAm/(SCH-M) 0.7 (SCH-Z) 0.3 /MPSf MMM exhibited outstanding CH 4 /N 2 separation performance (CH 4 permeance of 2888.48 GPU and selectivity of 4.38). Furthermore, when the loading of the binary filler was 45 %, the ideal CH 4 /N 2 selectivity and CH 4 permeance of PVAm/(SCH-M) 0.67 (SCH–U) 0.33 /MPSf MMM are 5.57 and 2263.94 GPU, respectively. This study provides a novel idea that introducing multi-MOF nanoparticles into MMMs for optimizing gas separation performance.
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