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学者姓名:郭红霞
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Abstract :
采用耐酸性良好的离子交换膜,研究含金属离子高浓度硝酸溶液的扩散渗析过程,用于回收水溶液中的硝酸.分别考察了进料液流量、硝酸浓度、酸水流量比等操作条件对非稳态扩散渗析过程的酸回收率和金属离子截留率的影响.结果表明,硝酸的回收率随进料液流量的增大先提高后下降,随原料液中硝酸浓度的增大而下降,随酸水流量比的增大而增加.当进料液中硝酸浓度为7 mol/L、流量为10.0 mL/min、酸水流量比为1∶1时,扩散渗析膜过程对硝酸的收率达73%,Fe~(3+)截留率为92%.根据硝酸在给定离子交换膜中的扩散速率,结合Fick定律回归数学模型参数,将模型计算结果与实际测量值对比,验证该数学模型的可靠性,为工...
Keyword :
硝酸回收 硝酸回收 扩散渗析 扩散渗析 离子交换膜 离子交换膜 膜内扩散速率 膜内扩散速率
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GB/T 7714 | 赵宗良 , 郭红霞 , 林育群 et al. 高浓度硝酸溶液的扩散渗析过程研究 [J]. | 膜科学与技术 , 2022 , 42 (01) : 110-114 . |
MLA | 赵宗良 et al. "高浓度硝酸溶液的扩散渗析过程研究" . | 膜科学与技术 42 . 01 (2022) : 110-114 . |
APA | 赵宗良 , 郭红霞 , 林育群 , 王保国 , 郭春禹 . 高浓度硝酸溶液的扩散渗析过程研究 . | 膜科学与技术 , 2022 , 42 (01) , 110-114 . |
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Abstract :
Molybdenum disulfide-based membranes have received wide attention for their excellent performance in chemical separation field. Yet, manipulating the structure of MoS2 membranes still remains an unprecedented challenge. In this work, the tubular MoS2 ceramic membranes were prepared by in-situ hydrothermal method using aqueous solution of thiourea and ammonium molybdate as precursor solution. The structure and morphology of the membranes were manipulated by introducing different alcohols into the precursor solution. The results indicated that the presence of alcohols drove the transformation of MoS2 morphology from nano sheets to spherical aggregates. As the molecular weight of the alcohols decreased, more small-sized molybdenum disulfide spheres were formed on the tubular ceramic substrate, which resulted in the formation of a great number of large transportation channels and promotion of surface area, and thereby improved the permeability of the membrane. Moreover, the addition of different alcohols enhanced the negative charge of the membrane surface, which ensured an effective rejection while enhancing the membrane permeability. The results demonstrate that the membranes prepared in a water-ethanol mixed solvent possess an excellent permeability for water (33.2 L/(m(2) h bar)) and methanol (52.2 L/(m(2) h bar)), with a rejection of more than 97% for Eriochrome black T, and an excellent pressure resistance as well as long-term running stability under cross-flow filtration. In addition, such membrane exhibited a below 30% rejection for salts, which can be utilized for dye desalination.
Keyword :
In-situ hydrothermal method In-situ hydrothermal method Nanofiltration Nanofiltration Alcohols Alcohols MoS2 ceramic membrane MoS2 ceramic membrane Dye desalination Dye desalination
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GB/T 7714 | Liu, Yue , Li, Xuejian , Liu, Tongtong et al. Alcohols assisted in-situ growth of MoS2 membrane on tubular ceramic substrate for nanofiltration [J]. | JOURNAL OF MEMBRANE SCIENCE , 2022 , 659 . |
MLA | Liu, Yue et al. "Alcohols assisted in-situ growth of MoS2 membrane on tubular ceramic substrate for nanofiltration" . | JOURNAL OF MEMBRANE SCIENCE 659 (2022) . |
APA | Liu, Yue , Li, Xuejian , Liu, Tongtong , Zheng, Zilong , Liu, Qiaohong , Wang, Yan et al. Alcohols assisted in-situ growth of MoS2 membrane on tubular ceramic substrate for nanofiltration . | JOURNAL OF MEMBRANE SCIENCE , 2022 , 659 . |
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Abstract :
一种亲水性耐氯聚砜膜制备与应用,属于膜分离技术领域。采用硅烷偶联剂辅助环糊精界面聚合方法对聚砜膜进行改性,得到亲水性耐氯聚砜膜。本发明制备的硅烷偶联剂辅助环糊精界面聚合改性聚砜复合膜具有较好的亲水性和耐氯性能。
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GB/T 7714 | 郭红霞 , 张梦蕾 , 秦振平 et al. 一种亲水性耐氯聚砜膜制备与应用 : CN202110033149.X[P]. | 2021-01-11 . |
MLA | 郭红霞 et al. "一种亲水性耐氯聚砜膜制备与应用" : CN202110033149.X. | 2021-01-11 . |
APA | 郭红霞 , 张梦蕾 , 秦振平 , 贾萌萌 , 崔素萍 . 一种亲水性耐氯聚砜膜制备与应用 : CN202110033149.X. | 2021-01-11 . |
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一种含MoS2中间层的聚酰胺陶瓷复合纳滤膜及其制备方法,属于膜分离技术领域。包括以下步骤:称取钼源和硫源化合物,加入去离子水中,得到前驱体溶液,将前驱体溶液倒入对位聚苯内衬中,将管式陶瓷基体完全浸入在前驱体溶液中;然后,将内衬密封后置于不锈钢反应釜中,在100~360℃下恒温反应,得到含MoS2中间层的陶瓷基体;将含MoS2中间层的陶瓷基体浸入水相单体溶液中,取出,待晾干后浸入到油相单体有机溶液中进行界面聚合;最后,将复合膜于30~100℃下热处理,即可。本发明有利于促进界面聚合过程形成连续均匀的聚酰胺分离层,显著提高了复合膜的分离性能。
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GB/T 7714 | 郭红霞 , 刘越 , 秦振平 . 一种含MoS2中间层的聚酰胺陶瓷复合纳滤膜及其制备方法 : CN202110978035.2[P]. | 2021-08-24 . |
MLA | 郭红霞 et al. "一种含MoS2中间层的聚酰胺陶瓷复合纳滤膜及其制备方法" : CN202110978035.2. | 2021-08-24 . |
APA | 郭红霞 , 刘越 , 秦振平 . 一种含MoS2中间层的聚酰胺陶瓷复合纳滤膜及其制备方法 : CN202110978035.2. | 2021-08-24 . |
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一种新型大环芳烃复合纳滤膜及其制备方法,属于膜分离技术领域。包括以下步骤:将间苯二酚杯[4]芳烃和过渡金属离子混合,将将预处理的超滤基膜于该溶液中浸渍,然后置于交联剂的有机溶剂中进行交联反应,然后在60~100℃条件下热处理,即可。本发明制备的金属配位的大环芳烃复合纳滤膜对染料废水具有优异的分离性能,在不降低截留率的情况下,大幅提高通量。
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GB/T 7714 | 郭红霞 , 贾萌萌 , 单玲珑 et al. 一种新型大环芳烃复合纳滤膜及其制备方法 : CN202110978033.3[P]. | 2021-08-24 . |
MLA | 郭红霞 et al. "一种新型大环芳烃复合纳滤膜及其制备方法" : CN202110978033.3. | 2021-08-24 . |
APA | 郭红霞 , 贾萌萌 , 单玲珑 , 秦振平 . 一种新型大环芳烃复合纳滤膜及其制备方法 : CN202110978033.3. | 2021-08-24 . |
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一种单宁酸‑羟丙基β环糊精复合纳滤膜及其制备方法,属于膜分离技术领域。将羟丙基β环糊精(HP‑β‑CD)与单宁酸混合作为水相单体,与酰氯油相单体在超滤膜表面进行界面聚合,制备单宁酸‑羟丙基β环糊精复合纳滤膜。所选用的HP‑β‑CD具有良好的水溶性,不需要氢氧化钠等溶解,避免了碱性环境对界面聚合成膜过程的影响。
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GB/T 7714 | 郭红霞 , 贾萌萌 , 单玲珑 et al. 一种单宁酸-羟丙基β环糊精复合纳滤膜及其制备方法 : CN202110707898.6[P]. | 2021-06-24 . |
MLA | 郭红霞 et al. "一种单宁酸-羟丙基β环糊精复合纳滤膜及其制备方法" : CN202110707898.6. | 2021-06-24 . |
APA | 郭红霞 , 贾萌萌 , 单玲珑 , 李春 , 秦振平 . 一种单宁酸-羟丙基β环糊精复合纳滤膜及其制备方法 : CN202110707898.6. | 2021-06-24 . |
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Abstract :
聚砜膜具有良好的耐高温性、耐酸碱性能和高的机械性能等,被广泛用于膜分离领域.但由于聚砜膜的表面疏水性,使其在水处理等方面的应用受到一定限制.针对聚砜膜的有机-无机改性,综述了近年来采用无机纳米粒子,如金属氧化物纳米粒子、表面修饰的氧化物纳米粒子、二维(2D)层状材料、金属有机共价材料(MOFs)和其他纳米粒子对聚砜膜的杂化改性及其研究进展,并对存在的问题和应用进行评述和展望.
Keyword :
无机纳米粒子 无机纳米粒子 有机-无机杂化膜 有机-无机杂化膜 聚砜膜 聚砜膜
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GB/T 7714 | 张梦蕾 , 贾萌萌 , 秦振平 et al. 聚砜有机-无机杂化改性膜的研究进展 [J]. | 膜科学与技术 , 2021 , 41 (3) : 153-161 . |
MLA | 张梦蕾 et al. "聚砜有机-无机杂化改性膜的研究进展" . | 膜科学与技术 41 . 3 (2021) : 153-161 . |
APA | 张梦蕾 , 贾萌萌 , 秦振平 , 崔素萍 , 张雪红 , 郭红霞 . 聚砜有机-无机杂化改性膜的研究进展 . | 膜科学与技术 , 2021 , 41 (3) , 153-161 . |
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Abstract :
As a unique characteristic two-dimensional transition metal dichalcogenide, molybdenum disulfide (MoS2) has become a promising membrane material for organic solvent nanofiltration (OSN) due to its good separation performance and stability. In this work, an MoS2 tubular ceramic membrane is prepared via an in situ hydrothermal method, exhibiting quite good stability in organic solvent. The 3D nanoflower-like structure of the MoS2 layer endows the modified membrane with an excellent OSN performance. With separation of a methanol solution of Evans blue (EB), the methanol flux was 403.1 L m-2 h-1 MPa-1 and the rejection of EB was 98.1%. The adhesion structures at the surface of MoS2/Al2O3 were evaluated using density functional theory, and an interfacial distance of 3.2 Å was obtained. Considering non-bond S-O interactions in addition to van der Waals forces, the work of adhesion (0.55 J m-2) and charge transfer process between the MoS2 layer and the ceramic substrate indicate good stability. The MoS2 tubular ceramic membrane maintains separation stability after performing in organic solvents of DMF for 80 h under cross-flow. © 2021 the Partner Organisations.
Keyword :
Van der Waals forces Van der Waals forces Organic solvents Organic solvents Density functional theory Density functional theory Nanofiltration Nanofiltration Methanol Methanol Ceramic membranes Ceramic membranes Adhesion Adhesion Transition metals Transition metals Electron transport properties Electron transport properties Stability Stability Sulfur compounds Sulfur compounds Molybdenum compounds Molybdenum compounds Charge transfer Charge transfer Layered semiconductors Layered semiconductors
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GB/T 7714 | Liu, Tongtong , Qin, Zhenping , Liu, Qiaohong et al. In situ growth of a tubular MoS2membrane on a ceramic tube with improved organic solvent nanofiltration performance [J]. | Materials Chemistry Frontiers , 2021 , 5 (7) : 3184-3191 . |
MLA | Liu, Tongtong et al. "In situ growth of a tubular MoS2membrane on a ceramic tube with improved organic solvent nanofiltration performance" . | Materials Chemistry Frontiers 5 . 7 (2021) : 3184-3191 . |
APA | Liu, Tongtong , Qin, Zhenping , Liu, Qiaohong , Li, Xuejian , Liu, Yue , An, Quan-Fu et al. In situ growth of a tubular MoS2membrane on a ceramic tube with improved organic solvent nanofiltration performance . | Materials Chemistry Frontiers , 2021 , 5 (7) , 3184-3191 . |
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Cement based materials are especially vulnerable to serious temperature changes in saline land or marine environments, resulting in the degradation of structures and properties. As the main binding components in cement based materials, the investigation of the C−S−H gel structure and water molecules behaviors enabled the detail damage mechanism of cement-based material under different temperatures. In this study, C−S−H gel models were successfully constructed with the final chemical formula of (CaO)1.65(SiO2)(H2O)1.79. Systematical research works were performed on the structures and properties of both C−S−H gel and water molecules in different local environments by molecular dynamics (MD) under temperatures ranging from 100 K to 500 K. Subsequently, the time correlation function (TCF) and mean square displacement (MSD) methods were introduced to explore the dynamic properties of various chemical bonds. The volume expansion of C−S−H gel under higher temperatures resulted from stretched bond length between silicon atoms and oxygen atoms, and variation of corresponding bond angles. In addition, higher temperatures promoted the prolonged hydrogen bond length, thus reduced the number of hydrogen bond. Moreover, the polarization of water molecules was weakened gradually under higher temperatures, but water molecules’ orientation fluctuated obviously along the out of plane directions of interlayer region. Additionally, MSD results revealed that water molecules showed temperature dependent diffusion behaviors in different chemical environments. © 2020 Elsevier Ltd
Keyword :
Molecules Molecules Cements Cements Bond strength (chemical) Bond strength (chemical) Degradation Degradation Molecular dynamics Molecular dynamics Calcium oxide Calcium oxide Hydrogen bonds Hydrogen bonds Silica Silica Silicon oxides Silicon oxides Bond length Bond length
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GB/T 7714 | Sun, Dawei , Wang, Yali , Ma, Wenxu et al. C−S−H gel structure and water molecules behaviors under different chemical environments in a range of temperatures [J]. | Materials Today Communications , 2021 , 26 . |
MLA | Sun, Dawei et al. "C−S−H gel structure and water molecules behaviors under different chemical environments in a range of temperatures" . | Materials Today Communications 26 (2021) . |
APA | Sun, Dawei , Wang, Yali , Ma, Wenxu , Lan, Mingzhang , Wang, Ziming , Sun, Shibing et al. C−S−H gel structure and water molecules behaviors under different chemical environments in a range of temperatures . | Materials Today Communications , 2021 , 26 . |
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The magnetic property of soft magnetic material is much dependent on its shape and anisotropy. In this work, the flake-like FeNi3 particles with 3D-network structure have been synthesized through hydrazine reduction at ambient condition in the presence of sodium lignosulfonate (SLS). The morphology and crystalline structure of the FeNi3 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and energy dispersion spectrum (EDS). Both of the static and dynamic magnetic property of the FeNi3 particles were investigated. The results indicated that the morphology of the FeNi3 particles changed from spherical to flake shape with increasing SLS concentration or reaction time. The possible mechanism on the variation of particles morphology was proposed. The static magnetic property indicated that the flake-like FeNi3 showed a higher saturation magnetization and coercivity than that of the spherical particles. Dynamic magnetic performance showed that the flake-like FeNi3 particles also exhibited significantly higher real part (μ') and imaginary part (μ') of the complex permeability than the spherical particles, especially in the range 0.6–1.0 GHz. © 2021 The Society of Powder Technology Japan
Keyword :
Iron metallography Iron metallography Magnetic bubbles Magnetic bubbles Spheres Spheres Nanoparticles Nanoparticles Soft magnetic materials Soft magnetic materials Sodium Sodium Nanocrystalline materials Nanocrystalline materials Iron alloys Iron alloys Synthesis (chemical) Synthesis (chemical) High resolution transmission electron microscopy High resolution transmission electron microscopy Binary alloys Binary alloys Nitrogen compounds Nitrogen compounds Scanning electron microscopy Scanning electron microscopy Morphology Morphology Nickel metallography Nickel metallography Magnetic properties Magnetic properties Saturation magnetization Saturation magnetization
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GB/T 7714 | Guo, Hongxia , Li, Mingye , Qin, Zhenping et al. Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate [J]. | Advanced Powder Technology , 2021 , 32 (3) : 755-763 . |
MLA | Guo, Hongxia et al. "Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate" . | Advanced Powder Technology 32 . 3 (2021) : 755-763 . |
APA | Guo, Hongxia , Li, Mingye , Qin, Zhenping , Li, Fan , Zhang, Xuehong , Wu, Wenzheng et al. Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate . | Advanced Powder Technology , 2021 , 32 (3) , 755-763 . |
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