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Journal of Environmental Sciences 2018年第8期30卷 63-73页

作者： zhiqian jia Shuang Hao Xiaoyu Lu Lab for Membrane Science and Technology College of Chemistry Beijing Normal University

Mg–Al–Fe layered double hydroxides（LDHs） were exfoliated and incorporated in polyether sulfone membranes for the removal of phosphate and fluoride for the first time. The exfoliation methods, coagulation bath, LDH amount, interfering ions, adsorption isotherm,desorption and reuse of the membranes were investigated. It was found that LDHs could be quickly exfoliated in formamide/N,N-dimethylformamide（DMF） solvent mixtures with sodium carboxymethyl cellulose as a stabilizer. The membranes displayed much higher adsorption capacity for phosphate（5.61 mg/g） and faster adsorption rate than the unexfoliated materials. With increased DMF content in the coagulation bath, the static and dynamic adsorption capacity rose. Interference from Cl-and SO4^（2-）（50 mg/L） on adsorption of phosphates was not apparent. The membranes displayed excellent reusability in dynamic adsorption/desorption. The membranes also showed high adsorption capacity for fluorides（1.61 mg/g）.

关键词： Layered double hydroxides Membrane Adsorption Phosphate Fluoride Exfoliation

Synthesis of polyaluminum chloride with a membrane reactor:Process characteristics and membrane fouling

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Journal of Environmental Sciences 2011年第11期23卷 1794-1798页

作者： zhiqian jia Fei He Zhongzhou Liu College of Chemistry Beijing Normal University Beijing 100875 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Polyaluminum chloride was synthesized with a membrane reactor,in which NaOH was added into AlCl 3 solution through the membrane’s micropores to reduce the NaOH droplets *** content of the most efficient species increased to about 80%.The process characteristics in the reaction （i.e.,flow velocity,pressure drop）,and membrane fouling and cleaning were *** evolution of both flow velocity and pressure drop during the reaction were related to changes in species distribution and solution *** process characteristics were well interpreted in terms of the Bernoulli *** reaction,the membranes were recovered by cleaning with diluted hydrochloride *** study is crucial for process design and scale-up of membrane reactors.

关键词： polyaluminum chloride membrane reactor flocculant Alb Al13

Catalytic bubble-free hydrogenation reduction of azo dye by porous membranes loaded with palladium nanoparticles

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Journal of Environmental Sciences 2014年第2期26卷 478-482页

作者： zhiqian jia Huijie Sun Zhenxia Du Zhigang Lei Laboratory for Membrane Science and Technology College of Chemistry Beijing Normal University Beijing University of Chemical Technology

Catalytic bubble-free hydrogenation reduction of azo dye by porous membranes loaded with palladium （Pd） nanoparticles was studied for the first time. The effects of Pd loading, dye concentration and reuse repetitions of membranes were investigated. In reduction, the dye concentration decreased whereas the pH rose gradually. An optimal Pd loading was found. The catalytic membranes were able to be reused more than 3 times.

关键词： hydrogenation reduction porous membrane bubble-free azo dye membrane contactor

Regulatable pervaporation performance of Zn-MOFs/polydimethylsiloxane mixed matrix pervaporation membranes

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Chinese Journal of Chemical Engineering 2022年第2期35卷 312-318页

作者： Guorong Wu Qiangwen Fan Wenjie Sun Zhiwu Yu zhiqian jia jianguo Ma jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China Lab for Membrane Science and Technology College of ChemistryBeijing Normal UniversityBeijing 100875China State Key Laboratory of Nuclear Resources and Environment School of BiologyChemistry and Material ScienceEast China University of TechnologyNanchang330013China jiangxi Province Key Laboratory of Synthetic Chemistry School of ChemistryBiology and Material ScienceEast China University of TechnologyNanchang 330013China Foshan(Southern China)Institute for New Materials Foshan 528247China

Pervaporation(PV)is an emerging separation technique for liquid *** matrix membranes(MMMs)often demonstrate trade-off relationship between separation factor and *** this study,by changing the organic linkers(2-methyl imidazolate,imidazole-2-carboxaldehyde,2-ethyl imidazolate),ZIF-8,ZIF-90 and MAF-6 were prepared and filled in polydimethylsiloxane(PDMS)membranes for dealcoholization of 5%(mass)n-butanol solution,and the membranes properties and pervaporation performances were *** with the pure PDMS membrane,the addition of ZIF-8 resulted in a 9%increase in flux(1136 g·m^(-2)·h^(-1))and a 22.5%increase in separation factor(28.3),displaying antitrade-off *** the MAF-6/PDMS MMMs(2.0%mass loading),the pervaporation separation index(PSI)and separation factor were 32347 g·m^(-2)·h^(-1) and 58.6 respectively(increased by 34%and 154%in contrast with that of the pure PDMS membrane),and the corresponding permeation flux was 552 g·m^(-2)·h^(-1),presenting great potential in the removal butanol from *** was deduced that the large aperture size combined with moderate hydrophobicity of metal–organic frameworks(MOFs)favor the concurrent increase in permeability and selectivity.

关键词： Pervaporation Biofuel Polydimethylsiloxane Membranes Metal-organic frameworks

Sensitive and environmental friendly sensor on porphyrin functionalized chitosan fiber membrane for Hg^(2+)

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Nano Research 2024年第11期17卷 9965-9970页

作者： Yafei Ma Xinman Liu Zhiping Fu Lifen Zhang Yuexin Guo Hui Wang zhiqian jia School of Pharmacy North China University of Science and Technology Tangshan 063210 China Tianjin TianShi College Tianjin 301700 China College of Chemistry Beijing Normal University Beijing 100875 China

Mercury is the most toxic and harmful heavy metal pollutant, and it is essential to detect and remove mercury from beverages. Inducing the porphyrin molecules into the chitosan structure, a novel membrane sensor tetrakis(4-carboxyphenyl)porphyrin-grafted chitosan fiber membrane (TCPP-CS) was prepared by electrospinning method and applied to recognize Hg^(2+) contaminant selectively. Compared with other common metal ions (Pb^(2+), Cu^(2+), Fe^(3+), Cr^(3+), Mg^(2+), and Zn^(2+)), the colorimetric sensor has specific color development and sensitivity to Hg^(2+) and the detection limit of the sensor reaches 1 × 10^(−5) mol·L^(−1). The response time of the membrane is 5 s, and it can be specifically colored in various pH environments convenient for practical application. Hg^(2+) resulted in a visual color change of the fiber membrane from brown to yellow-green, indicating a potential interaction between the porphyrin-functionalized chitosan fiber membrane and Hg^(2+) ions, and the wavelength shift of the UV–visible spectrum can be observed. It has the advantages of simplicity, rapidity, high selectivity, and high sensitivity, providing a new method for removing and detecting heavy metals in traditional Chinese medicine and drinks.

关键词： porphyrin functionalization selectivity Hg^(2+)removal electrospinning adsorption

Preparation of Calcium Carbonate Nanoparticles with a Continuous Gas-liquid Membrane Contactor： Particles Morphology and Membrane Fouling

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Chinese Journal of Chemical Engineering 2013年第2期21卷 121-126页

作者： jia zhiqian CHANG Qing QIN Jin MAMATA Aynur Lab for Membrane Science and Technology College of Chemistry Beijing Normal University Beijing 100875 China

Nanosized calcium carbonate particles were prepared with a continuous gas-liquid membrane contactor. The effects of Ca(OH)2 concentration, CO2 pressure and liquid flow velocity on the particles morphology, pressure drop and membrane fouling were studied. With rising Ca(OH)2 concentrations, the average size of the particles increased. The effects of Ca(OH)2 concentration and CO2 pressure on particles were not apparent under the experimental conditions. When the Ca(OH)2 concentration and liquid flow velocity were high, or the CO2 pressure was low, the fouling on the membrane external surface at the contactor entrance was serious due to liquid leakage, whereas the fouling was slight at exit. The fouling on the membrane inner-surface at entrance was apparent due to adsorption of raw materials. The membrane can be recovered by washing with dilute hydrochloric acid and reused for at least 6 times without performance deterioration.

关键词： membrane contactor gas-liquid reaction CaCO3 nanoparticles two-phase reaction membrane absorption

Erratum to: Sensitive and environmental friendly sensor on porphyrin functionalized chitosan fiber membrane for Hg^(2+)

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Nano Research 2024年第11期17卷 10256-10256页

作者： Yafei Ma Xinman Liu Zhiping Fu Lifen Zhang Yuexin Guo Hui Wang zhiqian jia School of Pharmacy North China University of Science and Technology Tangshan 063210 China Tianjin Normal University Tianjin 300387 China College of Chemistry Beijing Normal University Beijing 100875 China

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低温热致相分离制膜方法研究进展

膜科学与技术 2023年第5期43卷 202-209页

作者：张天琪贾志谦北京师范大学化学学院北京100875

传统热致相分离法(TIPS)是制备分离膜的重要方法,但操作温度较高,易引起聚合物分解,对设备要求也较高.低温热致相分离法(LT-TIPS)具有操作温度低、膜结构易调控的优点,近年来受到研究者们的关注.本文介绍了LT-TIPS相图特征、单一潜溶剂... 详细信息

传统热致相分离法(TIPS)是制备分离膜的重要方法,但操作温度较高,易引起聚合物分解,对设备要求也较高.低温热致相分离法(LT-TIPS)具有操作温度低、膜结构易调控的优点,近年来受到研究者们的关注.本文介绍了LT-TIPS相图特征、单一潜溶剂体系、混合潜溶剂体系、铸膜液中添加剂对膜结构的影响以及LT-TIPS膜应用的研究进展,并分析了LT-TIPS制膜方法面临的挑战和未来发展方向.

关键词：低温热致相分离法相图潜溶剂添加剂

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膜气液接触过程的研究进展

膜科学与技术 2010年第6期30卷 106-111页

作者：常青贾志谦秦晋北京师范大学化学学院膜科学与技术实验室北京100875

在膜气液接触过程中,气液流速可操作范围宽,结构紧凑,易于放大,不存在液泛、沟流和雾沫夹带等问题,已成为膜科学与技术研究的热点之一.分别介绍了膜气液接触器的结构,气液传质过程中气膜传质阻力、膜阻力和液膜传质阻力的估算以及影响... 详细信息

在膜气液接触过程中,气液流速可操作范围宽,结构紧凑,易于放大,不存在液泛、沟流和雾沫夹带等问题,已成为膜科学与技术研究的热点之一.分别介绍了膜气液接触器的结构,气液传质过程中气膜传质阻力、膜阻力和液膜传质阻力的估算以及影响这些阻力的主要因素,膜气液接触过程在气体分离、无泡曝气、饱和烃/不饱和烃分离、废气中VOCs脱除和纳米粒子制备等方面的应用,并对膜气液接触过程的发展方向进行了展望.

关键词：膜气液接触器膜吸收中空纤维膜

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精细化学品化学课程的教学改革和实践

高等理科教育 2008年第3期 134-136页

作者：贾志谦北京师范大学化学学院

文章探讨了精细化学品化学课程的特点、内容和教学目标，介绍了笔者在教学方法上的改革探索和教学效果。在教学方法上，综合采用了讲授、讨论、作业、撰写论文和举办论文报告会等形式。在讲授中，探索了“一线两点”讲授法，即以知识形... 详细信息

文章探讨了精细化学品化学课程的特点、内容和教学目标，介绍了笔者在教学方法上的改革探索和教学效果。在教学方法上，综合采用了讲授、讨论、作业、撰写论文和举办论文报告会等形式。在讲授中，探索了“一线两点”讲授法，即以知识形成过程和内在联系为线索，强调创新点，强调方法论，摈弃了传统的章节划分。

关键词：精细化学品化学课程改革教学改革讲授法