JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Han Bo-Ming,Zhang Hao-Rui,Gao Wen-Jie,He Xi-Wen,Li Wen-You,Zhang Yu-Kui
In this work, a dual-emission material based on lanthanide metals was synthesized and used as a ratio fluorescence sensor to respond to Hg 2+ and H 2 O 2 , respectively. Tb-BDC-NH 2 as a bimetal MOFs had double ligands and exhibited double fluorescence emission peaks at 550 nm and 450 nm. The two emission peaks of Tb-BDC-NH 2 can be quenched by Hg 2+ and H 2 O 2 respectively, forming a built-in calibration signal for ratio fluorescence detection. Based on the different detection conditions of the Hg 2+ and H 2 O 2 , the simultaneous detection of the two detection substances can be achieved with simple operation. This detection system had good stability and anti-interference ability. Under optimal conditions, the detection limit for Hg 2+ detection was 0.2 µM. Meanwhile, for the detection of H 2 O 2 , the detection limit was 11 µM and large linear ranges were obtained. Through actual sample testing, it had been proven that the ratio fluorescence sensor based on Tb-BDC-NH 2 had good application prospects. And the work also provided a new idea for double substances detection.
研究领域:
分析化学
·
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 Chemical Engineering
·
2022
·
IF 7.968
Caiyun Han,Jing Xie,Xize Min
Due to the non-degradable of heavy metal, adsorption has been extensively applied to abatement it. Most studies were focused on uptake metal ions via electrostatic attraction and ion exchange, and load molecule H 3 AsO 4 from strongly acidic wastewater was still challenging. To solve the problem, bimetallic La–Zr MOFs was facilely fabricated in this work, and the fcu topology structure of La-Zr MOFs was remained well under the investigate crystallization time and crystallization temperature. However, the crystallinity of the obtained La-Zr MOFs was influenced by the synthesized factors. The obtained La–Zr MOFs was employed as adsorbent to removal Cr(VI) and As(V), and the performance was evaluated by the batch experiment. The result indicated that the adsorption performance of Cr(VI) and As(V) was positively correlated with the crystallinity , and the optimal sample was 1LaUN 12 . From the XPS characterization, it was found that H 3 AsO 4 was successfully uptake over 1LaUN 12 surface, and the maximum monolayer adsorption capacity was 83.40 mgH 3 AsO 4 /g via ligand exchange and coordination reactions with La−OH and Zr−OH. In addition, the sample 1LaUN 12 also exhibited the excellent Cr(VI) load performance, and the maximum monolayer adsorption capacity of Cr(VI) was 222.5 mg/g. Above 40% Cr(VI) was reduced to Cr(III) by amino groups, and immobilized over the surface of 1LaUN 12 . Eventually, 1LaUN 12 displayed a good structural stability in the acidic medium, which was in favor of removing Cr(VI) and As(V) efficiently from strongly acidic solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ying Fang,Baoyu Qian,Ying Yang,Yang Song,Zhaoguang Yang,Haipu Li
Purification of high-arsenic (>10 µg/L) groundwater is of significance for drinking water safety all around the world. Considering the dominant presence of arsenite (As(III)) in groundwater and ineffective adsorption of As(III) by traditional adsorbents, the magnetic Zn/Co bimetallic MOFs (Zn/Co MOFs) which contain both catalytic and adsorption sites were prepared, and coupled with peroxymonosulfate (PMS) to realize the efficient simultaneous oxidation of As(III) and adsorption of evolved As(V). Considering the vital roles of oxidation and adsorption, the molar ratio of Zn and Co precursors was tuned ranging from 1: 1 to 9: 1 during Zn/Co MOFs synthesis to balance the catalysis and adsorption processes in the heterogeneous PMS system for As(III) immobilization. It was found that Zn/Co MOFs with Zn and Co molar ratio of 5: 1 possessing moderate catalytic performance and best adsorption capacity outperformed removal performance for As(III). The presence of PMS significantly promoted the elimination of both As(III) (the initial adsorption rate increased from 31.19 to 358.96 µg/g/min) and As(V) (the initial adsorption rate increased from 354.12 to 497.85 µg/g/min), which not only oxidized As(III) into As(V) by reactive species generated from PMS activation but also provided additional adsorption sites through enlarging pore size and changing chemical environment. Furthermore, Zn/Co MOFs coupled with the PMS system exhibited outstanding reusability and effectiveness for remediation of real high-arsenic groundwater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 55
·35666-35675
·
IF 4.036
Junhao Hu,Qiong Yi,Ziyi Xiao,Feng Tian,Tingting Shu,Xiaolan Liu,Yingxi Wang,Ling Li,Jiangang Zhou
Doxorubicin (DOX) has been an emerging environmental pollutant due to its significant genotoxicity to mankind. Advanced oxidation processes are a potential strategy to remove DOX in water solution. To develop a highly efficient catalytic agent to remove DOX, bimetal MOFs were synthesized, with Cu2+ and Co2+ as the central ions and adenine as the organic ligand. This study investigated the degradation of DOX by Co/Cu-MOFs combined with peroxymonosulfate (PMS). It was found that the degradation of DOX by Co/Cu-MOFs can reach 80% in only 10 seconds. This can be explained by the charge transfer from Co(III) to Co(II) being accelerated by Cu2+, resulting in the rapid generation of free radicals, which was proved by the EIS Nyquist diagram. Co/Cu-MOFs can be reused by simply washing with water without inactivation. Therefore, Co/Cu-MOFs can be used as an efficient catalytic agent to degrade DOX in environmental water.
研究领域:
环境科学
·
材料科学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jie Chen,Jianzhong Ma,Qianqian Fan,Wenbo Zhang,Ruyue Guo
The development of chrome-free tanning agents is of great significance for the green and sustainable improvement of the leather industry. Metal organic framework (MOFs) is a kind of nanomaterial with steady framework formed by the coordination of metal clusters with organic ligands, which gives it a natural self-masking structure. Herein, two kinds of bimetallic MOFs were obtained via post-synthesis modification and used in the tanning to produce leather with good hydrothermal stability. M n+ - replacing Zr-MOFs is denoted as Zr/M−MOFs (M n+ = Ti 4+ , Al 3+ ). Zr/M−MOFs were characterized by XRD, SEM, FT-IR, TG, XPS, and N 2 adsorption/desorption. The results indicate that M n+ - replacing provides more active site that can be combined with collagen fibers. Compared to the Zr-MOFs tanned leather (75.3 °C), the shrinkage temperature of Zr/M−MOFs tanned leather (79.9 °C) has been further improved. In addition, Zr/M−MOFs can also avoid the problems caused by traditional metal tanning, such as the worse washability of aluminum tanning. A new strategy to improve the tanning performance of MOFs-based tanning agents was provided. It gives a new approach to the development of chrome-free tanning agents.
研究领域:
材料科学
·
皮革化学与工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Li Qiu-Hao,Zhou Qi,Wang Yun-Long,Chen Rui-Jie,Chen Chong
Nuclear energy provides a competitive path for reduction of CO 2 with water, whereas the high-efficiency utilization of radiolytically produced active species for oriented transformation remains challenging. Herein, we report the assembling of yttrium-decorated bimetallic MOFs via one-step hydrothermal strategy, which can act as a sensitized nanoreactor for syngas production under γ-ray irradiation. The flower-shaped CuNi-MOF matrix with tunable metal centers exposed plentiful cooperative active sites for CO 2 binding, and its nanopetals enabled the well dispersion of Y 2 O 3 nanoparticles on the surfaces. The introduction of high- Z element Y enhanced the secondary electron scattering and promoted the water radiolysis to produce more hydrated electrons (e aq − ), thus accelerating the initial CO 2 activation to CO 2 •− . Moreover, the in situ formed coupling interlayer provided a fast charge transfer channel between Y 2 O 3 and the MOF framework, which facilitated the interfacial electron migration for intermediate generation and subsequent CO 2 conversion. By regulating the contents of Cu and Y 2 O 3 within the nanocomposites, the affinity toward CO 2 and the product compositions could be modulated. As a result, the optimal 7CN-2Y catalyst achieved a high syngas evolution rate of 311.07 μmol g −1 with a H 2 /CO ratio of 2.7:1 at an absorbed dose of 4 kGy. The present study offered a feasible route for the efficient transformation of CO 2 into valuable chemicals and the design of viable catalysts for ionizing radiation. Graphical abstract
研究领域:
核能化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Chen Hou,Wenqiang Chen,Linhui Fu,Sufeng Zhang,Chen Liang,Yang Wang
Perfluorooctanoic acid (PFOA) has demonstrated potential toxicity to human health and has been detected in different environmental matrices due to its stable physical and chemical properties. To degrade PFOA under solar light irradiation, we fabricated a lignin/polyvinyl alcohol (PVA)/Co/Fe metal-organic frameworks (lignin/PVA/bi-MOFs) composite membrane via a typical electrospinning and in-situ solvothermal method for the catalytic degradation of PFOA. In the peroxymonosulfate (PMS)/membranes/solar light system, Electron paramagnetic resonance analysis (EPR) demonstrated the sulfate radicals (SO 4 − ) and hydroxyl radicals (OH ) were generated by activating PMS with transition metal and solar light irradiation. Lignin/PVA/bi-MOFs showed outstanding performance in that 89.6% of PFOA was degraded within 3 h under optimal conditions. Compared with that in solar light, only 59.6% PFOA was degraded in the dark, and the rate constant of PFOA degradation decreased from 0.0150 min −1 to 0.0046 min −1 . Moreover, lignin/PVA/bi-MOFs were reused after simply rinsing with ultra-pure water and the degradation capacity of lignin/PVA/bi-MOFs remained at 77% after 4 cycles. The results might provide a new concept for the design of bimetallic MOFs for applications in organic pollutant removal.
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
MOLECULES
·
2024
·Vol. 29
·期 24
·5845
·
IF 4.2
Yaling Wu,Zhaopeng Sun,Yingying Chen,Dan Liu,Yan Meng,Zheng Yan
Metal synergy can enhance the catalytic performance, and a prefabricated solid precursor can guide the ordered embedding, of secondary metal source ions for the rapid synthesis of bimetallic organic frameworks (MM’-MOFs) with a stoichiometric ratio of 1:1. In this paper, Co-MOF-1D containing well-defined binding sites was synthesized by mechanical ball milling, which was used as a template for the induced introduction of Fe ions to successfully assemble the ordered bimetallic Co 1 Fe 1 -MOF-74@2 (where @2 denotes template-directed synthesis of MOF-74). Its electrocatalytic performance is superior to that of the conventional one-step-synthesized Co 1 Fe 1 -MOF-74@1 (where @1 denotes one-step synthesis of MOF-74), and the ratio of the two metal sources, Co and Fe, is close to 1:1. Meanwhile, the iron valence states (Fe II and Fe III ) in Co 1 Fe 1 -MOF-74@2 were further regulated to obtain the electrocatalytic materials Co 1 Fe 1 (II)-MOF-74@2 and Co 1 Fe 1 (III)-MOF-74@2 . The electrochemical performance test results confirm that Co 1 Fe 1 (II)-MOF-74@2 regulated by valence state has a better catalytic performance than Co 1 Fe 1 (III)-MOF-74@2 in the oxygen evolution reaction (OER) process. This phenomenon is related to the gradual increase in the valence state of Fe ions in Co 1 Fe 1 (II)-MOF-74@2 , which promotes the continuous improvement in the performance of the MOF before reaching the optimal steady state and makes the OER performance reach the optimum when the Fe II /Fe III mixed-valence state reaches a certain proportion. This provides a new idea for the directed synthesis and optimization of highly efficient catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 49
·期 2
·312-321
·
IF 4.052
Yuanfeng Wu,Xianghai Song,Siquan Xu,Yuan Chen,Olayinka Oderinde,Lijing Gao,Ruiping Wei,Guomin Xiao
Bimetal mixed MOFs of [CoZn][(BDC)(DABCO)0.5] (CZ-BDO), [CoNi][(BDC)(DABCO)0.5] (CN-BDO), and [NiZn][(BDC)(DABCO)0.5] (NZ-BDO) were prepared under solvothermal conditions and further employed as highly active accelerants for converting carbon dioxide into cyclic carbonates. The characteristics of the bimetal compounds were revealed via various techniques, including ICP-OES, XRD, FT-IR, Raman, XPS, SEM, EDS maps, N2 adsorption, TG-DTG, and CO2/NH3-TPD. The catalytic results revealed that CZ-BDO is superior to the other samples for obtaining a satisfactory chloropropene carbonate (CPC) yield. The excellent catalytic activity may be owing to the presence of a solid solution within the Co and Zn bimetal sample, which provides synergistic catalysis in the carbon dioxide cycloaddition. In addition, the synergistic catalysis was further confirmed by the NH3-TPD profiles, whereby the amount of CZ-BDO basic sites was obviously enhanced compared to the other samples. Furthermore, DFT calculations were also performed to reveal the synergistic catalysis between Co and Zn for the coupling reaction. Additionally, when the coupling reaction was carried out at 100 °C for 5 h in the presence of 0.5 wt% epichlorohydrin (ECH) as a catalyst at 3.0 MPa, 99.31% conversion of ECH and 97.05% yield of CPC were obtained over the optimal CZ-BDO sample. Moreover, the bimetal sample can also efficiently convert other epoxides into the corresponding cyclic carbonates.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Zhang Xu,Peng Xiaoqian,Liu Shaojun,Liu Xiaochan,Liu Guoran,Liu Rongshuang,Niu Jiale,Yuan Zhipeng,Zhang Jing,Yi Xibin,Filatov Serguei
A current challenge for natural gas adsorbed storage technology is to find specialized adsorbent materials that are able to store and deliver large amounts of methane (CH 4 ) near room temperature and at low pressures. In this study, bimetallic MOFs is supported on nitrogen-doped carbon foam derived from melamine (MC@NZn) by vacuum impregnation process as an adsorbent for CH 4 storage. The nitrogen-doped carbon foam with macroporous internetwork combined with high surface area and micro-/mesoporous structure of the NiZn-MOF leads a hierarchical porous structure, which provides efficient and rapid pathways for the penetration of CH 4 molecules and more active sites for CH 4 adsorption. Experimental results show that MC@NZ4 exhibits a CH 4 adsorption capacity of 105.80 cm 3 ·g -1 under 298 K and 60 bar with isosteric heat of adsorption of 10.71 kJ·mol -1 . Furthermore, MC@NZ4 achieves a CH 4 /N 2 adsorption selectivity of 5.63, indicating its potential for CH 4 adsorption. This work provides a simple method to combine MOF powders with three-dimensional skeleton substrate material to fabricate monolithic solid porous materials, which can find potential applications in gas adsorption.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Junfeng Qin,Shijie Hu,Xiaohua Zhang,Min Hong,Cuicui Du,Jinhua Chen
Although Metal-organic frameworks (MOFs) have attracted extensive attention in energy-related fields, the direct application of MOF as bifunctional electrocatalysts for overall water electrolysis still remains a challenging topic. Herein, nickel foam (NF) self-supported hydrangea shaped NiRu bimetallic MOFs (NiRu-PTA/NF) prepared by a simple one-step hydrothermal method was directly used as bifunctional electrocatalyst, and exhibited highly-efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalytic performances for alkaline freshwater/seawater overall splitting owing to the large active surface area, abundant active sites and high intrinsic activity attributed to the unique morphology, enriched oxygen vacancies and modulated electronic structure of the catalyst. Specifically, NiRu-PTA/NF needed only 16 mV overpotential to drive a HER current density of 10 mA cm −2 and 298 mV overpotential to drive a OER current density of 20 mA cm −2 in alkaline freshwater, much lower than those of Ni-PTA/NF ( η 10,HER = 162 mV, η 20,OER = 372 mV) and Ru-PTA/NF ( η 10,HER = 36 mV, η 20,OER = 335 mV). Furthermore, a two-electrode configured water electrolysis cell assembled with NiRu-PTA/NF as both cathode and anode required a very low cell voltage of 1.54 V to achieve an electrolytic current density of 10 mA cm −2 and were operated continuously for 200 h at various current densities including 10, 100 and 200 mA cm −2 . Additionally, the NiRu-PTA/NF-assembled electrolysis cell also displayed excellent seawater electrolysis performance. This study proposes an available strategy to design highly-efficient bifunctional catalysts for overall freshwater/seawater electrolysis based on electronic structure and oxygen vacancy modulation between bimetallic centers of MOFs, and extends their promising application prospects for industrially clean hydrogen production.
研究领域:
材料科学
·
能源化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2016
·Vol. 4
·期 1
·144-153
·
IF 4.532
Qiao Sun,Min Liu,Keyan Li,Yitong Han,Yi Zuo,Fanfan Chai,Chunshan Song,Guoliang Zhang,Xinwen Guo
Partial isomorphic substitution of iron in an Fe(BDC)(DMF,F) metal organic framework by manganese, cobalt, and nickel has been described for the first time. Specifically, different amounts of Mn, Co and Ni have been incorporated into the Fe-based framework during a solvothermal crystallization procedure. Several characterization techniques, including XRD, FT-IR, SEM, EDS, TG, XPS and ICP-AES, strongly support the effective incorporation of Mn, Ni and Co into material frameworks. The catalytic performance of these materials was examined in liquid-phase degradation of phenol at 35 °C and near neutral pH of 6.2. The results show that the degradation efficiency can be evidently improved by the incorporation of Mn, while it can be inhibited by the incorporation of Ni. The incorporation of Co shows no remarkable influence on the degradation process. Moreover, the ratios of n(Fe)/n(Mn) in the bimetallic MOFs have a strong impact on the degradation process. The stability and reusability of these catalysts under mild conditions were also demonstrated in this study. This work illustrates the potential of bimetallic MOF structures in developing active heterogeneous catalysts for the degradation process of toxic compounds.
研究领域:
材料科学
·
环境化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）