ACS Applied Nano Materials
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2023
·
IF 5.9
Xiaoqian Peng,Jing Zhang,Jinqiang Sun,Xiaochan Liu,Xinfu Zhao,Shimo Yu,Zhipeng Yuan,Sijia Liu,Xibin Yi
One of the most promising methods for capturing carbon dioxide (CO2) is solid physical adsorption, which is an efficient and simple technique. The key to effective CO2 capture is the development of high-performance solid adsorbents with excellent CO2 adsorption capacity, CO2/N2 selectivity, and rapid adsorption/desorption kinetics. In this paper, a Mg-MOF-74/sodium alginate composite aerogel was prepared by loading Mg-MOF-74 on sodium alginate sheets followed by directional freeze-drying. The composite aerogel exhibited a hierarchical porous structure, in which sodium alginate provided an open mesoporous/macroporous structure that promoted diffusion and contact with the active center of CO2. The Mg-MOF-74 micropores/mesopores promoted the strong interaction between CO2 and the adsorbent in the micropore and rapid mass transfer of CO2 to the adsorbent through the mesopores. The experimental data showed that MSA-6 achieved CO2 adsorption of 2.461 mmol·g–1 at 298 K. Furthermore, the CO2/N2 adsorption selectivity of MSA-6 reached 35.108, indicating its strong CO2 selective adsorption potential.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Zhihua Li,Lin Chen,Jiaxi Deng,Jing Zhang,Cailin Qiao,Mei Yang,Guoren Xu,Xiaogang Luo,Danqun Huo,Changjun Hou
Water contamination caused by heavy metals represents an urgent global issue. Cu 2+ , a potential trace heavy metal pollutant, can accumulate in the human body through the food chain, leading to excessive levels that give rise to diverse health complications. Hence, in this investigation, a novel and efficacious fluorescent probe named Eu-BTB was developed for the detection of Cu 2+ , employing 1,3,5-triphenyl(4-carboxyphenyl) (H 3 BTB) as the ligand and Eu 3+ as the metallic framework. The probe demonstrates exceptional fluorescence characteristics. The interaction between the probe ligand BTB and Eu 3+ triggers an antenna effect, heightening the emission efficiency of Eu 3+ while preserving its intrinsic emission. The introduction of Cu 2+ competes with BTB for binding, thus quelling the antenna effect and inducing a fluorescence alteration. Within the concentration range of 0.05–10 μM, the fluorescence intensity-to-Cu 2+ concentration ratio exhibits a robust linear correlation, with a remarkably low detection limit of 10 nM and a rapid response time of 3 min. The fluorescent probe has been effectively deployed for the detection of copper ions in water across diverse environmental conditions, with the obtained outcomes being validated via the conventional approach of inductively coupled plasma mass spectrometry (ICP-MS). The Eu-BTB probe showcases the advantages of simplicity, swiftness, and broad applicability, thus affirming its potential for the prompt and accurate detection of Cu 2+ in diverse environmental water samples.
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APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Haibin Yang,Junzhen Guo,Liang Chu,Zhi Huang,Zhaohui Liu,Liyan Wang,Zhaokun Wang,Mu Yang,Ge Wang
Utilizing natural, abundant, and eco-friendly materials to facilitate the industrial application of nano-sized MOF particles is of utmost importance, since these nanoparticles possess high activity but difficult to recovery. Herein, benefiting from the negatively charged vermiculite , dispersed nano-sized Fe-MOF particles were successfully in-situ grown on the surface of vermiculite nanosheets (VNs) via a simple solvothermal method. The construction of the composites improved the exposure of organic dye to active sites, resulting in a remarkable performance of Fe-MOF@VNs-4 towards photo-Fenton degradation of RhB , with a k value of 0.096 min −1 and an activity of 0.581 mmol g −1 h −1 , significantly higher than that of pure VNs and Fe-MOF, surpassing most reported MOF composite catalysts. The excellent adsorption ability of Fe-MOF@VNs, along with the presence of divalent iron in vermiculite, greatly enhanced catalytic performance. Mechanistic investigations revealed that VNs facilitate the separation of photoinduced carriers excited from Fe-MOF, indicating a synergy effect between Fe-MOF and VNs. Overall, this work provides a simple and effective strategy to design large-scale and commercially available catalysts for water treatment , and also offers a promising alternative for the industrial application of nano-sized MOF particles.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
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IF 4.464
Donghong Duan,Jiarong Feng,Shibin Liu,Yunfang Wang,Xianxian Zhou
Given the scarcity and high cost of metal Pt, the search for cheap and readily available non-precious metal catalysts remains the key to solving hydrogen evolution reactions (HER) today. Transition-metal phosphides (TMPs) have been widely studied in recent years due to their excellent catalytic activity. In this work, we using Co-based metal-organic framework (MOF) as the precursor, prepared two kinds of cobalt phosphide (CoP/C) by direct phosphating and indirect phosphating methods, which showed good electrochemical performance of HER. The Di-CoP/C showed lower overpotential of 136 mV at 10 mA cm −2 in the acid electrolyte, and the slope of Tafel was 49.3 mV dec −1 . At the same time, the catalyst showed excellent stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Lin Yue,Yunmeng Cao,Yonghui Han,Zaixing Li,Xiao Luo,Yanfang Liu
The magnetic metal-organic framework composite Fe 3 O 4 @Sn-MOF with core-shell structure was successfully prepared by hydrothermal synthesis. It was characterized by XRD , TEM , BET, DRS , FT-IR, XPS and VSM. The photocatalytic performance of the composite was evaluated by degradation of Acid Red 3R (AR3R) dye under simulated light source. Under the conditions that the additive amount of the catalyst was 6.7 g/L, the initial concentration of AR3R was 50 mg/L and the initial pH of AR3R was 3.0, Fe 3 O 4 @Sn-MOF revealed the optimized photocatalytic activity with 100% degradation efficiency of AR3R at 30 min. The excellent photocatalytic ability was mainly ascribed to the effective charge separation, strong photo-response and rich active sites. Besides, using Fe 3 O 4 as the magnetic nucleus was conducive to improve the recovery rate of the catalyst. The EPR and free radical analysis indicate that •O 2 − and •OH played important roles in the photocatalytic reaction. Meanwhile, a possible degradation process and mechanism were proposed by the full band scanning of AR3R, 3D-EEM fluorescence analysis and electrochemical measurement.
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NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 45
·21350-21358
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IF 3.591
Zhen-Zhen Ma,Yao Ma,Bing Liu,Ling Xu,Huan Jiao
Two cobalt metal–organic frameworks (Co-MOFs), [Ch]2[Co3(BDC)3Cl2] (1) and [Ch]2[Co3(BDC)4]·2DMU (2) (Ch+ = choline cation; H2BDC = terephthalic acid; DMU = 1,3-dimethylurea), were prepared through ionothermal reactions with deep eutectic solvents (DESs) of ChCl and DMU as the reaction media. The 1/GCE electrode with better current response was selected as the electrocatalyst. The detection performance of the 1/GCE electrode towards glucose is excellent with a wide linear range of 10–1200 μmol L−1, a detection limit of 3.2 μmol L−1 (S/N = 3), and a rapid response less than 3 s in 0.01 mol L−1 NaOH. 1 also exhibits high anti-interference with the existence of D-Man, D-Fru, DL-AA, and BA, long-term stability of 15 days and reproducibility for glucose detection. 1 was utilized to detect glucose in human serum and orange juice. The found glucose concentrations are very close to the added glucose concentrations in the selected situations with low RSD and high recoveries. This demonstrates that as a non-enzymatic glucose sensor, 1/GCE can detect glucose with high accuracy and reliability in different environments.
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Nanomaterials
·
2021
·Vol. 11
·期 10
·2488
·
IF 5.076
Jian Gao,Ziming Li,Ziqi Deng,Meihua Liu,Wei Wei,Chunbai Zheng,Yifan Zhang,Shusen Chen,Pengyang Deng
Mercury is one of the most toxic heavy metals that can cause terrible disease for human beings. Among different absorption materials, MOF (metal–organic framework) materials show potential as very attractive materials for the rapid removal of mercury. However, the instability and difficulty for regeneration of MOF crystals limit their applications. Here, a continuous sulfur-modified MOF (UiO-66-NHC(S)NHMe) layer was synthesized in situ on polymeric membranes (PP non-woven fabrics) by post-synthetic modification and used for rapid mercury removal. The MOF-based membrane (US-N) showed high selectivity for mercury in different aqueous systems, which is better than sulfur-modified MOF powders. A thinner MOF layer on US-N showed a much better mercury ion removal performance. US-N with a 59.3 nm MOF layer could remove more than 85% of mercury in 20 min from an aqueous solution. In addition, the US-N can simply regenerate several times for mercury removal and maintain the initial performance (removal ratio > 98%), exhibiting excellent durability and stability. This work promotes the application of MOF materials in the rapid removal of hazardous heavy metal ions from practical environments.Keywords:metal–organic frameworks;membrane;mercury removal;rapid;regenerable
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INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 9
·13040-13054
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IF 5.164
Peng Su,Hai Liu,Qingxiang Ma,Zhiliang Jin
Summary The photocatalytic hydrogen evolution reaction is one of the important ways to convert solar energy into renewable hydrogen. In this work, the Co 9 S 8 hollow polyhedron was formed after sulfidation and calcination with the metal-organic framework ZIF-67. The hollow polyhedron Co 9 S 8 provides abundant support sites for Mn 0.05 Cd 0.95 S and effectively reduces the agglomeration degree of Mn 0.05 Cd 0.95 S. The Co 9 S 8 hollow polyhedron as the reaction site has a large specific surface area and a mesoporous structure, which is beneficial to the progress of the photocatalytic reaction. A series of tests showed that the introduction of Co 9 S 8 hollow polyhedron significantly improved the light-trapping ability and exposed more reaction sites. Co 9 S 8 hollow polyhedrons are used as electron capture sites, which can effectively collect electrons and induce the interface charge transfer of Mn 0.05 Cd 0.95 S to Co 9 S 8 . Because the Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst had a strong light-trapping ability, abundant reaction sites and Co 9 S 8 -Mn 0.05 Cd 0.95 S heterojunction accelerate the separation and transfer of charges. Therefore, the hydrogen evolution rate of the 10%Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst was relatively high, which was 13.369 mmol g −1 h −1 . In addition, the 10%Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst still has good hydrogen evolution stability after four cycles. This research may supply a new idea for the preparation of high-efficiency photocatalysts with hollow structures. Novelty Statement The Co 9 S 8 hollow polyhedron provides abundant support sites for M 0.05 C 0.95 S particles, which effectively reduces the degree of agglomeration. The Co 9 S 8 -M 0.05 C 0.95 S heterojunction catalyst not only accelerates the migration and transfer of electrons, but also provides abundant reaction sites. Therefore, the Co 9 S 8 -M 0.05 C 0.95 S composite catalyst has good catalytic activity.
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ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Wen-Chao Hu,Jie Pang,Sudip Biswas,Kang Wang,Chen Wang,Xing-Hua Xia
Bacterial infection is one of the major causes of human death worldwide. To prevent bacterial infectious diseases from spreading, it is of critical importance to develop convenient, ultrasensitive, and cost-efficient methods for bacteria detection. Here, an electrochemical detector of a functional two-dimensional (2D) metal–organic framework (MOF) nanozyme was developed for the sensitive detection of pathogenic Staphylococcus aureus. A dual recognition strategy consisting of vancomycin and anti-S. aureus antibody was proposed to specifically anchor S. aureus. The 2D MOFs with excellent peroxidase-like activity can efficiently catalyze o-phenylenediamine to 2,2-diaminoazobenzene, which is an ideal electrochemical signal readout for monitoring the bacteria concentration. Under optimal conditions, the present bioassay provides a wide detection range of 10–7.5 × 107 colony-forming units CFU/mL with a detection limit of 6 CFU/mL, which is better than most of the previous reports. In addition, the established electrochemical sensor can selectively and accurately identify S. aureus in the presence of other bacteria. The present work provides a new pathway for sensitive and selective detection of S. aureus and presents a promising potential in the realm of clinical diagnosis.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Hai-Zhen Zhang,Jing-Ying Sun,Zhen-Lin Zhang,Zhen-Liang Xu
Water pollution is a growing issue that requires remediation. Surfactants, used in many domestic and industrial applications, are one of the emerging contaminants that require immediate concern. Removing low-concentration surfactants using nanofiltration (NF) membrane is a study that deserves attention. In this case, a mixed polyamide-based NF membrane was fabricated via interfacial polymerization (IP) using polyethylenimine (PEI) and piperazine (PIP) as monomers in aqueous solution. UiO66-NH 2 and UiO66 were synthesized and incorporated into the polyamide layer to enhance the permeability of the prepared NF membranes. The pure water flux of the NF membranes reached 16.6 L m −2 h −1 bar −1 when UiO66-NH 2 concentration in aqueous solution is 0.005 wt%, and the membrane showed decent rejection to divalent salts, 96.5% to MgCl 2 and 85.6% to Na 2 SO 4 . The prepared membranes were utilized to remove surfactants with the concentration (100 mg L −1 ) below the critical micelle concentration (CMC) from water, and they showed good removal to both anionic and cationic surfactants . In addition, the durability of the fabricated NF membranes is acceptable. This work provides a feasible strategy for the fabrication of highly permeable NF membranes and demonstrates the capability of NF membrane for surfactants removal.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Yanbing Sun,Yuanyuan Wei,Jiaying Pei,Huarui Nan,Youqun Wang,Xiaohong Cao,Yunhai Liu
Synthesizing highly efficient adsorbent materials to remove U(VI) from contaminated water remains a major challenge. Here, using UiO66-NH 2 as a sacrificial template, porous carbons (ZrO 2 @PCs) were prepared by high-temperature calcination , and then a simple strategy was used for phosphorylation modification to prepare the target product ZrO 2 @PCs-PO 4 . The microscopic surface morphology and structure of ZrO 2 @PCs-PO 4 characterized by SEM, FT-IR and XRD reveals that phosphate groups has been successful introduced on the surface of ZrO2@PCs-PO 4 . Batch experimentation showed that the phosphorylation process improves the adsorption behaviors , and the maximum monolayer adsorption capacity for U(VI) is 496.5 mg/g. The adsorption isotherms and kinetics were simulated to explore its adsorption mechanism. The excellent selectivity and reusability ensure this material could apply in selective removal of U(VI) ions.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Manlin Li,Weiqiu Huang,Bo Tang,Qianxi Fang,Xiang Ling,Aihua Lv
Four different kinds of metal–organic framework (MOF) materials Zn-BTC, Cu-BTC, Cr-BTC, and Fe-BTC are incorporated into alginate, forming various hydrogels for n-hexane vapor adsorption. The cross-link networks between center cations of MOFs and alginate are verified by comparing the Fourier transform infrared characteristic peaks of the MOF/alginates with that of bare alginate. Interestingly, the MOF/alginate composites cross-linked by trivalent cations (Cr3+ and Fe3+) contain micropores while those cross-linked by divalent cations (Zn2+ and Cu2+) do not. The specific surface parameters of the as-prepared hydrogels are affected by the concentration of the alginate. In addition, the Fe-BTC/alginate performs the best n-hexane vapor adsorption capacity among the four kinds of composites. This study would be helpful for a better understanding of the effect of ionic cross-linking on the alginate hydrogel surface area parameters and provide basic knowledge and reference for expanding the applications of the MOF/alginate hydrogels.
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