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  1. Article ; Online: Effects of magnesium hydroxide morphology on Pb(ii) removal from aqueous solutions.

    Zhu, Donghai / Zhu, Jiachen / Li, Ping / Lan, Shengjie

    RSC advances

    2024  Volume 14, Issue 11, Page(s) 7329–7337

    Abstract: In this study, magnesium hydroxide (MH) particles with distinct morphologies were obtained through direct precipitation and subsequent hydrothermal treatment with various magnesium salts. The synthesized products were systematically characterized and ... ...

    Abstract In this study, magnesium hydroxide (MH) particles with distinct morphologies were obtained through direct precipitation and subsequent hydrothermal treatment with various magnesium salts. The synthesized products were systematically characterized and utilized for the removal of Pb(ii) ions from aqueous solutions. The adsorption process of Pb(ii) by two different MH structures, namely flower globular magnesium hydroxide (FGMH) and hexagonal plate magnesium hydroxide (HPMH), adhered to the Langmuir isotherm and pseudo-second-order model. FGMH exhibited higher Pb(ii) removal capacity (2612 mg g
    Language English
    Publishing date 2024-03-01
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra08040d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Efficient adsorption and degradation of dyes from water using magnetic covalent organic frameworks with a pyridinic structure

    Zhang, Xue / Zhu, Donghai / Wang, Shiyi / Zhang, Jinwen / Zhou, Shuangxi / Wang, Wei

    Environ Sci Pollut Res. 2023 Mar., v. 30, no. 12 p.34669-34683

    2023  

    Abstract: Covalent organic frameworks (COFs) have promising applications in environmental remediation owing to their precise directional synthesis and superior adsorption ability. However, magnetic COFs with pyridinic N have not been studied as bifunctional ... ...

    Abstract Covalent organic frameworks (COFs) have promising applications in environmental remediation owing to their precise directional synthesis and superior adsorption ability. However, magnetic COFs with pyridinic N have not been studied as bifunctional materials for the adsorption and catalytic degradation of dyes. Therefore, in this study, a magnetic COF with a pyridinic structure (BiPy-MCOF) was successfully synthesized using a solvothermal method, which exhibited higher methyl orange (MO) removal than other common adsorbents. The best degradation efficiency via the Fenton-like reaction was obtained by pre-adsorbing MO for 3 h at pH 3.1. Both adsorption and catalytic degradation resulted in better removal of MO under acidic conditions. The introduction of pyridinic N improved MO adsorption and degradation on BiPy-MCOF. The electrostatic potential (ESP) showed that pyridinic N had a strong affinity for MO adsorption. Density functional theory calculations confirmed the potential sites on MO molecules that may be attacked by free radicals. Possible degradation pathways were proposed based on the experimental results. Moreover, BiPy-MCOF could effectively degrade MO at least four times, and a high degradation efficiency was obtained in other dyes applications. The coupling of adsorption and degradation demonstrated that the as-prepared BiPy-MCOF was an effective material for organic dyes removal from water.
    Keywords adsorbents ; adsorption ; density functional theory ; magnetism ; methyl orange ; pH ; remediation
    Language English
    Dates of publication 2023-03
    Size p. 34669-34683.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-24688-w
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Efficient removal of per/polyfluoroalkyl substances from water using recyclable chitosan-coated covalent organic frameworks: Experimental and theoretical methods.

    Zhang, Xue / Wang, Shiyi / Zhu, Xingyi / Zhu, Donghai / Wang, Wei / Wang, Bin / Deng, Shubo / Yu, Gang

    Chemosphere

    2024  Volume 356, Page(s) 141942

    Abstract: Covalent organic frameworks (COFs) demonstrate remarkable potential for adsorbing per/polyfluoroalkyl substances (PFAS). Nevertheless, the challenge of recycling powdered COFs hampers their practical application in water treatment. In this research, a ... ...

    Abstract Covalent organic frameworks (COFs) demonstrate remarkable potential for adsorbing per/polyfluoroalkyl substances (PFAS). Nevertheless, the challenge of recycling powdered COFs hampers their practical application in water treatment. In this research, a quaternary amine COF with inherent positive surface charge was synthesised to adsorb perfluorooctanoic acid (PFOA) via electrostatic interactions. The COF was then combined with chitosan (CS) through a simple dissolution-evaporation process, resulting in a composite gel material termed COF@CS. The findings indicated that the adsorption capacity of COF@CS significantly surpassed that of the original COF and CS. According to the Langmuir model, COF@CS achieved a maximum PFOA capacity of 2.8 mmol g
    Language English
    Publishing date 2024-04-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2024.141942
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Facile fabrication of Fe

    Zhu, Jiachen / Li, Ping / Yang, Bowen / Lan, Shengjie / Chen, Weiyuan / Zhu, Donghai

    RSC advances

    2023  Volume 13, Issue 47, Page(s) 33403–33412

    Abstract: In this study, we fabricated magnetic ... ...

    Abstract In this study, we fabricated magnetic Fe
    Language English
    Publishing date 2023-11-14
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra05961h
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Synthesis of Zinc Oxide Doped Magnesium Hydrate and Its Effect on the Flame Retardant and Mechanical Properties of Polypropylene.

    Li, Xue / Zhang, Hongbo / Liu, Xiaoyuan / Lv, Zhihui / Jin, Yankui / Zhu, Donghai / Dang, Li

    Polymers

    2023  Volume 15, Issue 21

    Abstract: In this work, an effective flame retardant consisting of nanoscale zinc oxide doped on the surface of hexagonal lamellar magnesium hydrate (ZO@MH) has been successfully synthesized via a hydrothermal process. Approximately 3- ... ...

    Abstract In this work, an effective flame retardant consisting of nanoscale zinc oxide doped on the surface of hexagonal lamellar magnesium hydrate (ZO@MH) has been successfully synthesized via a hydrothermal process. Approximately 3-methacryloxypropyltrimethoxysilane (KH-570) is chosen as a modifier of ZO@MH for the purpose of enhancing the interfacial interaction between ZO@MH and the polypropylene (PP) matrix and reducing the agglomeration of ZO@MH. Afterwards, ZO@MH and KH-570 modified ZO@MH (KZO@MH) filled PP (PP/ZO@MH and PP/KZO@MH) composites are respectively prepared via the melt blending method. The flame retardant and smoke suppression properties of PP/ZO@MH and PP/KZO@MH composites are estimated by a cone calorimetry test (CCT). The peak value of the heat release rate of the PP/40KZO@MH composite is 327.0 kW/m
    Language English
    Publishing date 2023-10-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym15214248
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Controllable fabrication of a hybrid containing dodecyl dihydrogen phosphate modified magnesium borate whisker/hydrated alumina for enhancing the fire safety and mechanical properties of epoxy resin

    Zou, Sai / Lan, Shengjie / Dang, Li / Li, Ping / Zhu, Donghai / Li, Le

    RSC advances. 2022 Mar. 08, v. 12, no. 12

    2022  

    Abstract: A composite particle with hydrated alumina deposited on the surface of magnesium borate whisker (MBW@HA) was prepared following a chemical liquid deposition method. Subsequently, dodecyl dihydrogen phosphate (DDP) was grafted onto the surface of the ... ...

    Abstract A composite particle with hydrated alumina deposited on the surface of magnesium borate whisker (MBW@HA) was prepared following a chemical liquid deposition method. Subsequently, dodecyl dihydrogen phosphate (DDP) was grafted onto the surface of the composite particles to synthesize an inorganic–organic hybrid (MBW@HA–DDP). The structure, morphology, and composition of MBW@HA–DDP were well characterized. The results revealed the hybrid of MBW@HA–DDP was successfully synthesized characterized by a hydrophobic surface. Subsequently, the obtained MBW@HA–DDP was incorporated into epoxy resin (EP) to fabricate flame retardant composites. The results revealed that the incorporation of MBW@HA–DDP significantly improved the fire safety of EP, for instance, the total heat release (THR) and peak heat release rate (PHRR) of the EP composite with 10-phr MBW@HA–DDP added were reduced by 28.1% and 32.0%, respectively, accompanied with lower total smoke production (TSP) and smoke production rate (SPR). The improved fire safety was due to the barrier function of MBW and HA, and the dilution effect of water vapor generated from HA. Meanwhile, the phosphorus oxoacids generated from DDP could function as catalysts and increase the degree of graphitization of the char residues, thus protecting the matrix effectively. In relation to mechanical properties, the incorporation of MBW@HA–DDP did not deteriorate the mechanical properties of EP but improved them to some extent. The results presented herein help develop a novel strategy for developing flame retardants characterized by good flame-retardant behavior and improved mechanical properties.
    Keywords aluminum oxide ; epoxides ; fire safety ; flame retardants ; heat ; hydrophobicity ; keto acids ; liquids ; magnesium borate ; phosphates ; phosphorus ; smoke ; water vapor
    Language English
    Dates of publication 2022-0308
    Size p. 7422-7432.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/d1ra08289b
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Efficient adsorption and degradation of dyes from water using magnetic covalent organic frameworks with a pyridinic structure.

    Zhang, Xue / Zhu, Donghai / Wang, Shiyi / Zhang, Jinwen / Zhou, Shuangxi / Wang, Wei

    Environmental science and pollution research international

    2022  Volume 30, Issue 12, Page(s) 34669–34683

    Abstract: Covalent organic frameworks (COFs) have promising applications in environmental remediation owing to their precise directional synthesis and superior adsorption ability. However, magnetic COFs with pyridinic N have not been studied as bifunctional ... ...

    Abstract Covalent organic frameworks (COFs) have promising applications in environmental remediation owing to their precise directional synthesis and superior adsorption ability. However, magnetic COFs with pyridinic N have not been studied as bifunctional materials for the adsorption and catalytic degradation of dyes. Therefore, in this study, a magnetic COF with a pyridinic structure (BiPy-MCOF) was successfully synthesized using a solvothermal method, which exhibited higher methyl orange (MO) removal than other common adsorbents. The best degradation efficiency via the Fenton-like reaction was obtained by pre-adsorbing MO for 3 h at pH 3.1. Both adsorption and catalytic degradation resulted in better removal of MO under acidic conditions. The introduction of pyridinic N improved MO adsorption and degradation on BiPy-MCOF. The electrostatic potential (ESP) showed that pyridinic N had a strong affinity for MO adsorption. Density functional theory calculations confirmed the potential sites on MO molecules that may be attacked by free radicals. Possible degradation pathways were proposed based on the experimental results. Moreover, BiPy-MCOF could effectively degrade MO at least four times, and a high degradation efficiency was obtained in other dyes applications. The coupling of adsorption and degradation demonstrated that the as-prepared BiPy-MCOF was an effective material for organic dyes removal from water.
    MeSH term(s) Coloring Agents/chemistry ; Adsorption ; Water/chemistry ; Metal-Organic Frameworks/chemistry ; Magnetic Phenomena
    Chemical Substances Coloring Agents ; Water (059QF0KO0R) ; Metal-Organic Frameworks
    Language English
    Publishing date 2022-12-14
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-24688-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Controllable fabrication of a hybrid containing dodecyl dihydrogen phosphate modified magnesium borate whisker/hydrated alumina for enhancing the fire safety and mechanical properties of epoxy resin.

    Zou, Sai / Lan, Shengjie / Dang, Li / Li, Ping / Zhu, Donghai / Li, Le

    RSC advances

    2022  Volume 12, Issue 12, Page(s) 7422–7432

    Abstract: A composite particle with hydrated alumina deposited on the surface of magnesium borate whisker (MBW@HA) was prepared following a chemical liquid deposition method. Subsequently, dodecyl dihydrogen phosphate (DDP) was grafted onto the surface of the ... ...

    Abstract A composite particle with hydrated alumina deposited on the surface of magnesium borate whisker (MBW@HA) was prepared following a chemical liquid deposition method. Subsequently, dodecyl dihydrogen phosphate (DDP) was grafted onto the surface of the composite particles to synthesize an inorganic-organic hybrid (MBW@HA-DDP). The structure, morphology, and composition of MBW@HA-DDP were well characterized. The results revealed the hybrid of MBW@HA-DDP was successfully synthesized characterized by a hydrophobic surface. Subsequently, the obtained MBW@HA-DDP was incorporated into epoxy resin (EP) to fabricate flame retardant composites. The results revealed that the incorporation of MBW@HA-DDP significantly improved the fire safety of EP, for instance, the total heat release (THR) and peak heat release rate (PHRR) of the EP composite with 10-phr MBW@HA-DDP added were reduced by 28.1% and 32.0%, respectively, accompanied with lower total smoke production (TSP) and smoke production rate (SPR). The improved fire safety was due to the barrier function of MBW and HA, and the dilution effect of water vapor generated from HA. Meanwhile, the phosphorus oxoacids generated from DDP could function as catalysts and increase the degree of graphitization of the char residues, thus protecting the matrix effectively. In relation to mechanical properties, the incorporation of MBW@HA-DDP did not deteriorate the mechanical properties of EP but improved them to some extent. The results presented herein help develop a novel strategy for developing flame retardants characterized by good flame-retardant behavior and improved mechanical properties.
    Language English
    Publishing date 2022-03-08
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra08289b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Organic-Inorganic Modification of Magnesium Borate Rod by Layered Double Hydroxide and 3-Aminopropyltriethoxysilane and Its Effect on the Properties of Epoxy Resin.

    Zou, Sai / Dang, Li / Li, Ping / Zhu, Jiachen / Lan, Shengjie / Zhu, Donghai

    Polymers

    2022  Volume 14, Issue 17

    Abstract: To alleviate the safety hazards associated with the use of epoxy resin (EP), a multifunctional filler was designed. This study firstly combines the superior mechanical properties of magnesium borate rods (MBR) with the excellent smoke suppression and ... ...

    Abstract To alleviate the safety hazards associated with the use of epoxy resin (EP), a multifunctional filler was designed. This study firstly combines the superior mechanical properties of magnesium borate rods (MBR) with the excellent smoke suppression and flame-retardant characteristics of layered double hydroxide (LDH). H
    Language English
    Publishing date 2022-09-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym14173661
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Post-synthetic thiol modification of covalent organic frameworks for mercury(II) removal from water.

    Wang, Wei / Gong, Minjuan / Zhu, Donghai / Vakili, Mohammadtaghi / Gholami, Zahra / Jiang, Huanhuan / Zhou, Shuangxi / Qu, Han

    Environmental science and ecotechnology

    2023  Volume 14, Page(s) 100236

    Abstract: Various materials have been developed for environmental remediation of mercury ion pollution. Among these materials, covalent organic frameworks (COFs) can efficiently adsorb Hg(II) from water. Herein, two thiol-modified COFs (COF-S-SH and COF-OH-SH) ... ...

    Abstract Various materials have been developed for environmental remediation of mercury ion pollution. Among these materials, covalent organic frameworks (COFs) can efficiently adsorb Hg(II) from water. Herein, two thiol-modified COFs (COF-S-SH and COF-OH-SH) were prepared, through the reaction between 2,5-divinylterephthalaldehyde and 1,3,5-tris-(4-aminophenyl)benzene, followed by post-synthetic modification using bis(2-mercaptoethyl) sulfide and dithiothreitol, respectively. The modified COFs showed excellent Hg(II) adsorption abilities with maximum adsorption capacities of 586.3 and 535.5 mg g
    Language English
    Publishing date 2023-01-07
    Publishing country Netherlands
    Document type Journal Article
    ISSN 2666-4984
    ISSN (online) 2666-4984
    DOI 10.1016/j.ese.2023.100236
    Database MEDical Literature Analysis and Retrieval System OnLINE

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