COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Hui Li,Yiding Luo,Fuyou Yu,Huimin Zhang
Superhydrophobic/superoleophilic paper with excellent self-cleaning and antibacterial activity was prepared via combination of in-situ growing Cu metal-organic frameworks (Cu-MOFs) nanoparticles on paper surface by simple layer-by-layer assembly together with subsequent polydimethylsiloxane (PDMS) treatment under ambient conditions. The surface chemical composition , crystalline pattern, surface chemical functional group, surface morphology and wettability of the modified paper samples were investigated by X-ray photoelectron spectroscopy, X-ray diffraction, fourier transform infrared spectroscopy , scanning electron microscope and water contact angle measurement. The synergetic effect of Cu-MOFs nanoparticles and PDMS was crucial and essential for achieving a superhydrophobic surface. The PDMS/(Cu-MOFs) 5 @paper not only showed self-cleaning, antibacterial activity and superhydrophobicity/superoleophilicity, but also exhibited excellent oil-water separation performance for oil-water mixture and emulsion. In addition, this obtained superhydrophobic paper showed good mechanical and chemical durability. In summary, the proposed method provides a new perspective into preparing superhydrophobic paper for oil spills treatment and environmental remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
npj Clean Water
·
2025
·Vol. 8
·期 1
·1-17
·
IF 11.4
Xu Dan,Cao Xiaolin,Zhou Jie,Lin Zhihao,Wang Jing,Han Jiatong,Chen Ge,Liu Guangyang,Xu Xiaomin,Zhang Yanguo,Xu Donghui
To address the environmental threats posed by dye pollution, it is crucial to develop adsorbents with high selectivity and adsorption capacity for the removal of chemical dye pollutants. In this study, five types of Ni/Fe-MOFs were synthesized via a one-pot solvothermal method by varying the Ni/Fe molar ratio. Their physicochemical structures, surface morphologies, and compositions were characterized through a series of techniques, and their adsorption performances for different dyes were preliminarily investigated. The results demonstrated that the Ni/Fe ratio significantly affects the microstructure and adsorption performance of the MOFs. As the molar ratio of Ni/Fe increased, the structures of the five materials transformed from nanoflowers (Fe-MOFs) to nanospheres (Ni/Fe(3:1)MOFs) , and eventually to rhombic blocks (Ni-MOFs) . The specific surface area decreased from 281.3 m²/g (Fe-MOFs) to 67.11 m²/g (Ni/Fe(1:1)MOFs) and further to 0.5369 m²/g (Ni-MOFs) . XPS analysis confirmed the synergistic coordination between Ni and Fe, and FT-IR spectra revealed characteristic peaks for hydroxyl groups on the MOF surface and carboxylate ligands. XRD analysis indicated that materials with higher Ni content were more prone to ligand decomposition, which is consistent with the weight loss observed in the TG-DSC between 230 and 350 °C. The materials exhibited selective adsorption for different dyes. Under optimal conditions, the maximum adsorption capacities for Eosin Y (EY), Neutral Red (NR), and Acid Fuchsin (AF) were 54.92 mg/g (Fe-MOFs) , 636.31 mg/g (Ni-MOFs) , and 79.30 mg/g (Ni/Fe(1:1)MOFs) , respectively. The adsorption kinetics followed a pseudo-second-order model, and the adsorption isotherms conformed to the Langmuir model, while Fe-MOFs and Ni/Fe(1:1) MOFs also exhibited compatibility with the Freundlich model. The adsorption mechanism primarily involved monolayer adsorption as the dominant process, with localized multilayer adsorption, as well as chemisorption, hydrogen bonding, hydroxyl interactions, and electrostatic interactions. These MOFs demonstrated high dye removal efficiency in actual water samples and fruit and vegetable juices, exhibiting excellent reusability and anti-interference capabilities. Importantly, compared with the single system, Fe-MOFs and Ni/Fe(1:1)MOFs exhibit competitive adsorption, and Ni-MOFs exhibit synergistic adsorption in the binary system. This study confirms that by adjusting the Ni/Fe molar ratio, MOFs with high selectivity and adsorption performance for different dyes can be designed, providing new theoretical insights and technical support for environmental remediation and food safety applications.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2021
·Vol. 36
·期 14
·2961-2972
·
IF 3.089
Zhu Lijun,Zhu Xinxin,Zhang Chao,Huo Tian,Hou Xinlan,Guo Dandan,Zhang Huiming,Xia Daohong
The zirconium-based porphyrin MOFs sensitized TiO 2 (PCN224–TiO 2 ) was synthesized in situ by self-assembly of porphyrin, ZrCl 4 with nano TiO 2 . The composite catalyst was determined by detailed structural and photoelectrochemical characterization. The UV–Vis absorption and fluorescence spectrum confirm that PCN224 and TiO 2 are coupled. The PCN224–TiO 2 had significant absorption of visible light and the PCN224–TiO 2 had the largest photo-generated current, which proved the porphyrin MOFs material has good internal conductivity and has a close combination with TiO 2 . Compared with carboxyphenyl porphyrin sensitized TiO 2 (HTCPP–TiO 2 ), mixture of TCPP and TiO 2 (TCPP/TiO 2 ) and PCN224, the PCN224–TiO 2 showed better removal performance of methylene blue under visible light. Under low-power xenon lamp irradiation, the removal rate of PCN224–TiO 2 (1:3) on methylene blue reached 93.2% in 4 h. And PCN224–TiO 2 had stable cycling catalytic performance. The PCN224–TiO 2 promoted the degradation process by strengthening the adsorption of organic pollutants, thus improving the removal performance. Graphic abstract
研究领域:
材料科学
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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
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材料科学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 14
·5065-5071
·
IF 4.099
Junyi Yang,Xiao Feng,Guangnong Lu,Yulin Li,Chaochao Mao,Zhongliang Wen,Wenbing Yuan
The use of salts as grinding media to assist the mechanosynthesis, and the following one-pot mechanochemical post-synthesis, of hierarchically porous MOFs was carried out efficiently by ball milling. NaCl or KCl were used as a solid solvent to initially pre-grind with 1,3,5-benzenetricarboxylic acid (H3BTC) and copper acetate monhydrate, respectively, for 1 minute, then both mixtures were combined together for a further 20 minutes of grinding, and the resultant mixture was finally washed with ethanol and water to obtain the hierarchically micro-, meso- and macroporous HKUST-1 with a high yield. Moreover, the post-synthesis of these as-obtained hierarchically porous HKUST-1 was easily performed via grinding triethylenediamine (TED) with the above unwashed crude-products for 20 minutes. By adjusting the amount of NaCl and TED added, we simply fabricated the pore- and function-adjustable hierarchically porous HKUST-1. Furthermore, these as-obtained HKUST-1 products showed high performance in the capture of volatile iodine.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Ming Ruan,Huajing Zhou,Lingxiang Zhao,Tianding Hu,Liang He,Shaoyun Shan
It is feasible to improve the photodegradation efficiency of organic pollutants by metal-organic frameworks (MOF)-based semiconductors via ligand engineering. In this work, three (Fe/Co)-XBDC-based MOFs were synthesized by introducing different ortho-functional groups X (X = –H, –NO 2 , –NH 2 ) next to the carboxyl group of the organic ligand (i.e., terephthalic acid). The analysis focused on the influence mechanism of the adjacent functional group effect of the ligand on the physicochemical properties of the material and the actual photodegradation activity of TC . Multiple pieces of evidences suggested that the differences in electron-induced and photocharge-transfer mechanisms of the above ortho functional groups affect the crystal morphology and photocatalytic activity of FeCo-MOF during pyrolysis . Interestingly, (Fe/Co)–NH 2 BDC exhibited the highest photocatalytic activity under neutral conditions. The results of density functional theory show that the introduction of a strong donor-NH 2 group can enhance light absorption and act as an “electron pump” to supply electrons to the iron center, accelerating the separation and efficient transport of photogenerated carriers on the ligand-metal bridge. In conclusion, this study is a proposal for a strategy of structural regulation for the enhancement of the catalytic activity of (Fe/Co)-MOFs in the photodegradation of TC.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Zhongyu Yang,Long Zhang,Yiyuan Zhang,Mengyuan Bai,Yunchuan Zhang,Zihan Yue,Erhong Duan
Pyrolysis process of metal-organic frameworks (MOFs) was analyzed by thermal analysis kinetics for the study of the synthesis of MOFs-based carbon materials with high adsorption performance. The process was studied based on the thermogravimetric mass spectrometry (TG-MS), through which the gas products of the pyrolysis process were detected. The HKUST-1 and MIL-101 were prepared by solvothermal method and characterized by XRD, BET, SEM and TEM. The characterization results showed that HKUST-1 and MIL-101 have been successfully prepared with cubic octahedral morphology and specific surface areas up to 1477.50 m 2 /g and 2239.88 m 2 /g, respectively. The data of TG-DTG showed that the pyrolysis of HKUST-1 and MIL-101 could be divided into three stages and seven stages, respectively. The kinetic triplets of different pyrolysis stages were calculated by iso-conversional methods, and the gas products decomposed were analyzed, through which the pyrolysis mechanism of MOFs was inferred. The first pyrolysis stages of HKUST-1 and MIL-101 were both dehydration stages, the E values of both were less than 100 kJ/mol, and the pyrolysis mechanism of both two materials at this stage were the chemical reaction mechanism. The average apparent activation energy of the main pyrolysis carbonization stages of both was about 180 kJ/mol, and both followed the random nucleation and subsequent growth mechanism, indicating that there were some uniformities between the two materials in the main pyrolysis stage. The main gas products in this stage were CO, CO 2 and benzene. The apparent activation energy of the final deep carbonization stage were 564.36 and 387.60 kJ/mol, respectively, and mechanisms followed were chemical reactions and three-dimensional diffusion mechanisms, meaning that there were some differences between the two materials in the deepening stage.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Wang,Yakun Teng,Shushu Jia,Wenyan Li,Tianyi Yang,Ya Cheng,Hao Zhang,Xiang Li,Lijuan Li,Ce Wang
The successful development of a cost-effective and efficient adsorbent is crucial for the optimal treatment of pharmaceutical sewage. In this study, a UiO-66(Hf)–NH 2 nanocrystal modified composite nanofiber membrane (HfPNFM) was synthesized through electrospinning and solvothermal techniques, for the removal of salicylic acid (SA). The in-situ growth of UiO-66(Hf)–NH 2 on the nanofibers led to a significant increase in the specific surface area of the composite nanofiber membrane. Furthermore, HfPNFM demonstrated exceptional flexibility and reusability, with the removal efficiency of SA still at 96.85 % even after ten cycles. The adsorption process of SA onto HfPNFM was well described by the pseudo-second-order kinetic model and Langmuir isotherm model, with a maximum adsorption capacity of 128.21 mg/g. In dynamic adsorption experiments, HfPNFM effectively removed 100 % of SA at a concentration of 50 mg/L. The chemical oxygen demand (COD) concentration of SA was reduced from 165.89 mg/L to 41.47 mg/L by two layers of HfPNFM filtration, below the standard for pharmaceutical wastewater discharge (GB: 21904-2008). X-ray photoelectron spectroscopy (XPS) revealed that electrostatic interactions, π-π interactions, hydrogen bond interactions, and metal complexation interactions between SA and HfPNFM were responsible for the adsorption. This highly effective composite nanofiber membrane has promising potential for pharmaceutical wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Aotian Gu,Peng Wang,Kaiwei Chen,Elvis Djam Miensah,Chunhui Gong,Yan Jiao,Ping Mao,Kai Chen,Jinlong Jiang,Ying Liu,Yi Yang
Based on two topologically distinct MOFs, the core–shell bimetallic MIL-101/ZIF-67 x (M/Z x ) were successfully prepared to activate the self-decomposition of peroxymonosulfate (PMS) for 2-chlorophenol (2-cp) degradation. The M/Z x not only inherited the merits of single-metal MOFs such as high surface area and pore volume, but also exhibited superior catalytic performance. In the M/Z x /PMS system, 90% of the 2-cp (100 mg/L) was removed within 10 min with a reaction rate of 0.241 min −1 . This observation was attributed to the synergistic catalysis of cobalt and iron active sites in M/Z x , which greatly promoted the Co 2+ /Co 3+ redox cycle, thereby enhancing the catalytic performance. Further investigation found that both radical and non-radical pathway jointly promote the degradation of 2-cp, and the singlet oxygen ( 1 O 2 ) mediated non-radical pathway serve a predominant role. Meanwhile, SO 4 ·- and · OH also accelerated this process. The possible degradation pathway was proposed by identifying the intermediates of 2-cp degradation. This work provides some new ideas for the design of multi-metal MOFs for environmental remediation.
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 Applied Materials & Interfaces
·
2019
·
IF 8.456
Fan Xiao,Xiaoyu Hu,Yingbo Chen,Yufeng Zhang
Four different thin-film nanocomposite (TFN) membranes were prepared by adding different concentrations of porous Zr-metal-organic frameworks (MOFs) (UiO-66 and UiO-66-NH2) to piperazine aqueous solution (aqueous phase) or 1,3,5-benzenetricarbonyl trichloride-n-hexane solution (organic phase) by interfacial polymerization. The main purpose is to study the specific effects of different addition methods and addition amounts of nanoparticles on the structure and performance of the TFN membranes by interfacial polymerization. All four TFN membranes exhibited a higher water permeability while maintaining high salt rejection compared to thin-film composite membrane. On the one hand, the TFN membranes behave differently, which are prepared by adding the same kind of nanoparticles to the aqueous phase or organic phase, respectively. The TFN membrane prepared by adding 0.2 w/v% UiO-66 to the organic phase had a high water flux of 87.86 L m–2 h–1, compared to 46.31 L m–2 h–1 of the membrane prepared by adding 0.3 w/v% UiO-66 in the aqueous phase. This is due to the fact that UiO-66 greatly slows the interfacial polymerization rate when UiO-66 is added to the organic phase, resulting in a thinner and wider-aperture polyamide thin-film layer, reducing the water transmission resistance during filtration. Therefore, it is more economical by adding nanoparticles to organic phase than aqueous phase under the same filtering effect. On the other hand, different nanoparticles can also cause differences in performance and structure of the TFN membranes even in the same preparation manner. TFN membrane with UiO-66-NH2 in the aqueous phase has higher water permeance than the one with UiO-66 in the aqueous phase, owing to the good hydrophilicity of the amino group, which improves the water dispersibility of UiO-66-NH2 so that the TFN membrane is more uniform. In addition, UiO-66-NH2 slows down the process of interface polymerization, making the membrane more porous. The monomers in the aqueous phase and organic phase can be adsorbed in the pores of Zr-MOFs, which makes the interfacial polymerization occur both in the pores and on the surface of the pores. Thus, the compatibility between the polyamide and MOFs was enhanced and less defects were formed in the thin-film layer, resulting in a high salt rejection even when the concentration of Zr-MOFs increased. This is the first time to explain that polyamide membrane has not obvious salt rejection attenuation with increasing porous material content using pore adsorption reaction monomer principle. Also, the Zr-MOFs-based TFN membrane exhibited good heat resistance and antifouling property. This work shows that porous Zr-MOFs nanomaterials have significant advantages in the development of nanofiltration membranes with high water flux and rejection.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
PubMed
高影响因子
Foods
·
2025
·Vol. 14
·期 8
·1311
·
IF 5.1
Yanyan Huang,Jiatong Han,Yi Ping,Xin Chen,Yiming Zhao,Ge Chen,Jun Lv,Donghui Xu,Yanguo Zhang,Jing Chen,Guangyang Liu
In this study, two types of Cu-MOFs (Cu-TCPP and CuO-TCPP) with a two-dimensional layered porous structure were prepared via in situ polymerization using Cu2+, CuO, and TCPP as raw materials. Both Cu-MOFs exhibited peroxidase-like activity, capable of catalyzing the oxidation of TMB by H2O2to form oxTMB, resulting in an absorption peak at 652 nm and a color change from colorless to blue. Subsequently, the addition of AA can reduce oxTMB back to TMB, causing the color of the system to lighten or become colorless. Based on this principle, a simple and rapid colorimetric method for AA detection was established and successfully applied to the detection of TAC in fruits and vegetables. The results showed that Cu-TCPP and CuO-TCPP had a large linear range of ascorbic acid detection of 0.01–100 mM (Cu-TCPP) and 0.05–100 mM (CuO-TCPP). This study not only provides a novel method for preparing nanozymes with peroxidase-like activity, but also offers a simple approach for analyzing the TAC of food.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Weiwei Li,Wenlan Ji,Murat Yılmaz,Tian C. Zhang,Shaojun Yuan
Arsenic is a toxic carcinogen, and arsenic pollution in groundwater is one of the most serious environmental problems in the world. Thus, it is an urgent problem to efficient removal of arsenic from groundwater. In this work, a novel MWCNTs/MIL-53(Fe) nanocomposite was successfully synthesized to improve the water stability of MIL-53(Fe) by incorporation of carboxylated multi-walled carbon nanotubes (MWCNTs) using a one-pot hydrothermal method, and was then used to efficiently adsorb As(V) ions from groundwater. Adsorption experimental results demonstrated an ultrafast adsorption rate of As(V) on the MWCNTs/MIL-53(Fe) nanocomposites in solution pH values of 3 to 10, and the adsorption equilibrium could be reached in circa 20 min with an adsorption capacity of 27.24 mg·g −1 in a low As(V) concentration of 10 mg·L −1 . The adsorption kinetics of As(V) on the MWCNTs/MIL-53(Fe) was found in line with the pseudo-second-order (PSO) kinetic model, and was simultaneously controlled by both internal diffusion and liquid film diffusion. The adsorption isotherm data conformed to the Redlich-Peterson isotherm model, indicating both physical and chemical adsorption occurred at heterogeneous interfaces. Moreover, the postulated adsorption mechanism of As(V) on MWCNTs/MIL-53(Fe) nanocomposites was ascribed to hydrogen-bond interaction, electrostatic attraction and chemical complexation. Therefore, the as-prepared MWCNTs/MIL-53(Fe) nanocomposites not only exhibit superior water stability and outstanding adsorption performance in removing arsenic-contaminated groundwater, but also offer a novel insight for rational preparation of water-stable MOF-based composites.
研究领域:
环境科学
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材料科学
✓ 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）