Gas Science and Engineering
·
2023
·
IF 0
Guanhua Zhang,Shaocong Mo,Hongtao Xu,Xiaoyu Yan,Binlin Dou,Guomin Cui,Qiguo Yang,Wei Lu
Metal-organic frameworks (MOFs) are popular crystalline materials owing to their high porosity, tunable pore structure, and large surface area. By introducing a carboxylic acid to compete with 2,5-dihydroxyterephthalic acid for magnesium ions in solution, a crystal defect method was used to prepare multi-level pore Mg-MOF-74 with an unregular framework structure of Mg-MOF-74 in this paper. In the prepared samples, the adsorption amounts varied in descending order with various carboxylic acid species: Mg-MOF-74-Propionic acid (37.95 cm 3 /g STP) > Mg-MOF-74 (15.46 cm 3 /g STP) > Mg-MOF-74-Acetic acid (9.19 cm 3 /g STP) > Mg-MOF-74-Formic acid (7.81 cm 3 /g STP). At 1.5 kPa, the CO 2 adsorption of 2,5-dihydroxyterephthalic acid and propionic acid with a ratio of 2:1 can reach 2.78 cm 3 /g STP (standard temperature and pressure) with the comparison to 0.47 cm 3 /g STP of pristine Mg-MOF-74. Under atmospheric pressure, the adsorption capacity of modified Mg-MOF-74 can reach 37.95 cm 3 /g STP, equivalent to 2.45 times of the original Mg-MOF-74.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chunni Zhang,Hao Zhao,Ting Zhou,Baishan Guo,Shinan Huang,Jingyu Cai,Linxi Hou
The development of dual-functional composite materials that integrate efficient electromagnetic wave (EMW) absorption and thermal conductivity is a crucial advancement in addressing the issues of electromagnetic pollution and heat accumulation in electronic devices. In this work, Ni x Co y -C/PAM hydrogels derived from mixed metal MOF-74 were successfully fabricated by in situ radical polymerization with the assistance of an external magnetic field. The properties of Ni x Co y -C/PAM were optimized by varying the ratios of cobalt and nickel metals as well as their oxides, thereby providing opportunities for the creation of advanced electromagnetic wave absorbers. When the Ni/Co ratio was increased to 1:1, Ni 1 Co 1 -C/PAM demonstrated superior EMW absorption performance at a filler ratio of 3 wt%. This configuration exhibited a minimum reflection loss of −57.8 dB at 8.64 GHz with a thickness of 3.6 mm, alongside an effective absorption bandwidth extending up to 5.81 GHz with a thickness of 2.3 mm. Furthermore, magnetic orientation within the filler facilitated enhanced heat transfer by establishing high-efficiency thermal conductive pathways. This study offers valuable insights into designing polymer composites characterized by improved thermal conductivity and robust EMW absorption capabilities.
研究领域:
材料科学
·
电磁学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Hongai Zheng,Yao Zhou,Derui Wang,Meilin Zhu,Xin Sun,Shuangyan Jiang,Yankun Fan,Daquan Zhang,Lizhi Zhang
Catalytic membrane reactors (CMR) based on the sulfate-based advanced oxidation processes (SR-AOPs) have exhibited fantastic applications prospects in water treatment. We synthesized Cu-MOF-74 by an environmentally friendly and facile method, then used it as PVDF (polyvinylidene fluoride) membrane surface modification layer. The results presented that Cu-MOF-74 can significantly improve anti-fouling ability of PVDF membrane (60.9% and 64.1% anti-adsorption of dye and protein). The modified membranes exhibited relatively low flux loss. Simultaneously the modified membrane catalyzed peroxymonosulfate (PMS) to achieve 97.1% degradation efficiency of Rhodamine B (RhB) within 60 min and 90.2% dye penetration recovery within 30 min. Cu-MOF-74 exhibited greater catalytic activity than homogeneous Cu (II) and showed a wide range of pH adaptation. Finally, XPS and ESR proved that it was the redox of Cu (II)/Cu (I) in the Cu-MOF-74 structure making PMS mainly produce SO 4 - • and •OH to oxidize pollutant molecules. The modus proposed in this study may provide a more promising strategy for the preparation of high-efficiency catalytic membranes and their practical applications in wastewater treatment processes .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Chunling Xin,Yang Ren,Zhaofei Zhang,Lili Liu,Xia Wang,Jinmei Yang
Hierarchical porous composite Mg-MOF-74/MCFs were successfully synthesized using a simple and facile method under in situ solvothermal conditions. Textural structures and morphologies of the composites were characterized by X-ray diffraction (XRD), N2 adsorption–desorption isotherms, and scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The results demonstrate that a large amount of nanosized Mg-MOF-74 particles is incorporated into the pores of mesocellular siliceous foams (MCFs) without remarkable aggregation and the composites possess microporous and mesoporous characteristics of both components. In addition, CO2 adsorption properties of the composites were tested in a fixed bed with/without hydrothermal treatment. The total CO2 adsorption capacities were calculated by breakthrough curves. The CO2 adsorption capacity of the composites reaches 1.68 mmol/g, which is smaller than that of pristine Mg-MOF-74. However, the total CO2 adsorption capacity of the composites after hydrothermal treatment reaches 2.66 mmol/g, which is larger than that of Mg-MOF-74 (2.39 mmol/g) under the same condition. XRD patterns and SEM images of the composites demonstrate that the hydrothermal stability and CO2 adsorption performance of the composites were improved compared with those of pristine Mg-MOF-74 after hydrothermal treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Advances
·
2020
·Vol. 1
·期 5
·1212-1219
·
IF 0
Jing-Bo Tan,Jing-Qi Wu,Jia-Wei Zhao,Ling-Jie Xie,Gao-Ren Li
Here, we report the successful fabrication of highly dispersed ultrafine Ni nanoparticles (NPs) embraced into the partially carbonized Ni-MOF-74 (Ni NPs/C@Ni-MOF-74) microrod arrays by the heat treatment of the rod-like Ni-MOF-74 arrays grown on Ni foam. The partial carbonization is an effective strategy to realize the homogeneous dispersion of ultrafine Ni NPs and carbon in the skeleton of rod-like Ni-MOF-74. This can prevent the encapsulated Ni NPs and carbon from aggregation and oxidation, allowing them to serve as highly efficient electrocatalysts. The fabricated Ni NPs/C@Ni-MOF-74 not only provide high specific surface area and high conductivity, but also provide good hydrophilicity and synergetic effects among Ni NPs, carbon and Ni-MOF-74 for the adsorption and activation of H2O molecules. The HER electrocatalytic performance of Ni NPs/C@Ni-MOF-74 arrays can be optimized by the control of the carbonization time and temperature. The optimized Ni NPs/C@Ni-MOF-74/NF shows outstanding HER catalytic performance, with a low overpotential of 131 mV at 10 mA cm−2 and excellent durability, and it is superior to most of the recently reported MOF-based HER electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Chen Hou,Linhui Fu,Yang Wang,Wenqiang Chen,Fang Chen,Sufeng Zhang,Jianzhi Wang
Smart nanomaterials that can simultaneously detect and eliminate contaminants in water environment are significant for health protection. To achieve such goal, Co-MOF-74 was in-situ assembled on regenerated cellulose membranes followed by calcination process, thus achieving dual-functional Co 3 O 4 /cellulose derivative membrane (Co 3 O 4 /CDM) catalyst. The Co 3 O 4 morphology was readily controlled by further recrystallization of the deposited MOF precursor. Combining the high enrichment ability of cellulose membrane and outstanding peroxidase-active of Co 3 O 4 , the fast color reaction for phenol was accomplished within 10 min by Co 3 O 4 /CDM with the assistance of H 2 O 2 and 4-aminoantipyrine (4-AAP). Moreover, the Co 3 O 4 /CDM also portrayed an excellent degradation property for phenol elimination via sulfate radical-advanced oxidation processes (SR-AOPs). The degradation efficiency of phenol reached 93% in 20 min, and the possible mineralization mechanism was proposed based on the XPS and LC-MS analysis. Thus, Co-MOF-74 derived Co 3 O 4 /CDM shows excellent properties in aiding the colorimetric detection and degradation of phenol in aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2018
·
IF 3.12
Jianqiang Sun,Xiaobing Zhang,Anping Zhang,Chunyang Liao
To obtain a cost-effective adsorbent for the removal of arsenic in water, a novel nanostructured Fe–Co based metal organic framework (MOF-74) adsorbent was successfully prepared via a simple solvothermal method. The adsorption experiments showed that the optimal molar ratio of Fe/Co in the adsorbent was 2:1. The Fe 2 Co 1 MOF-74 was characterized by various techniques and the results showed that the nanoparticle diameter ranged from 60 to 80 nm and the specific surface area was 147.82 m 2 /g. The isotherm and kinetic parameters of arsenic removal on Fe 2 Co 1 MOF-74 were well-fitted by the Langmuir and pseudo-second-order models. The maximum adsorption capacities toward As(III) and As(V) were 266.52 and 292.29 mg/g, respectively. The presence of sulfate, carbonate and humic acid had no obvious effect on arsenic adsorption. However, coexisting phosphate significantly hindered the removal of arsenic, especially at high concentrations (10 mmol/L). Electrostatic interaction and hydroxyl and metal–oxygen groups played important roles in the adsorption of arsenic. Furthermore, the prepared adsorbent had stable adsorption ability after regeneration and when used in a real-water matrix. The excellent adsorption performance of Fe 2 Co 1 MOF-74 material makes it a potentially promising adsorbent for the removal of arsenic.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS COMMUNICATIONS
·
2018
·
IF 3.463
Xilei Lu,Lixin Wang,Xiuyang Lu
Metal organic frameworks (MOFs) are promising heterogeneous catalysts for biomass conversion to useful chemicals. In this work, four M-MOF-74s (Co, Ni, Mg, Zn) were synthesized at room temperature. Among these, Mg-MOF-74 exhibited the best catalytic activity for conversion of sugars to methyl lactate. A final product yield of methyl lactate from glucose of 35% was achieved with complete conversion of glucose at optimal reaction conditions. Catalytic performance of conversion of five sugars to methyl lactate over Mg-MOF-74 was studied, a product yield of 47% were obtained from sucrose. Mg-MOF-74 catalyst has shown to be reusable for at least three cycles.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
Plasma Processes and Polymers
·
2024
·
IF 2.9
Qinlong Song,Xianyi Yin,Haibao Zhang
Designing efficient noble metal-free catalysts for plasma-catalytic ammonia synthesis is significant and challenging. Carbon-based metal catalysts were prepared at different pyrolysis temperatures using the Ni-MOF-74 precursor. The effects of Ni-MOF-74 and its derived carbon-based metal catalysts on pulsed dielectric barrier discharge (DBD) plasma ammonia synthesis were investigated. The results showed that Ni-MOF-74-300 with both the MOF structure and nickel metal particles exhibited the best catalytic performance for ammonia synthesis. The ammonia synthesis rate reached 41.38 mmol g −1 h −1 , whereas the nitrogen conversion rate was as high as 1.54% with an energy yield of 3.04 g kWh −1 . Compared to the situation of plasma only, the ammonia synthesis rate, nitrogen conversion rate, and energy yield were increased by 28.46 times, 5.7 times, and 5.5 times, respectively.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2017
·
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.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2020
·
IF 3.57
Sittipranee Ploychompoo,Qianwei Liang,Xin Zhou,Chen Wei,Hanjin Luo
Contamination of drinking water with heavy metals, particularly arsenic (As), is a persistent problem with serious public health implications worldwide. In this study, we present a zinc based metal-organic framework (Zn-MOF-74) and polyacrylamide polymer (PAM) coated on reduced graphene oxide (rGO) as an effective adsorbent for the removal of arsenite (As(III)) from water. Zn-MOF-74 nanoparticles were prepared by room-temperature precipitation and these were immobilized on rGO surface grafted PAM by a free-radical polymerization method, (Zn-MOF-74/rGO/PAM nanocomposites). The experimental data correlates well with the pseudo-second-order kinetic model and Langmuir isotherm, and the maximum adsorption capacity ( q max ) was 282.4 mg g −1 at pH 10, 298 K. The removal efficiency was rapid, removing more than 99.8% of As(III) from a 0.2 mg L −1 solution and achieving drinkable levels in 15 min. Thermodynamic data revealed that the process was spontaneous and endothermic. Furthermore, the adsorbent revealed high stability in pH range 4–10 and could be reused at least four times. Adsorption mechanism involved a synergistic combination of chemisorption and physisorption. FTIR and XPS analyzes revealed that the amide group (–NH 2 ) and hydroxyl group (–OH) on Zn-MOF-74/rGO/PAM dominate in their adsorption.
研究领域:
环境科学
·
材料科学
·
水处理
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Liang Ye,Ya Zhang,Siyang Jin,Chaohui Zhou,Junbao Pang,Yunjie Luo,Yuhang Yu,Wei Xu
Compared with monometallic metal–organic frameworks (MOFs), the synergistic effect of multiple metals significantly enhances the catalytic performance of the CO2 cycloesterification reaction, leading to improved CO2 adsorption and catalytic conversion capabilities. To investigate this concept, a high-entropy MOF-74 (HE-MOF-74) with a uniform distribution of five distinct metal ions (Zn2+, Mg2+, Ni2+, Co2+, and Cu2+) was successfully synthesized using a straightforward mechanical ball milling technique and comprehensively characterized (including structural, morphological, and physicochemical properties). The results reveal that HE-MOF-74 exhibits significantly increased specific surface area and CO2 adsorption capacity compared with those of monometallic MOF-74. The presence of multiple unsaturated metal centers as Lewis acid sites, oxygen atoms linking the metals, and ligand-based hydroxyl groups serving as base sites enable efficient immobilization of CO2 into cyclic carbonate. This study introduces a novel synthetic approach for the green and efficient production of HE-MOF-74 and proposes a new application for CO2 utilization.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）