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Synthesis of Hydrophilic Acid-resistant Ge-ZSM-5 Membranes via Secondary Growth Method Using Silicalite-1 Zeolite as Seeds

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Chemical Research in Chinese Universities 2017年第1期33卷 12-16页

作者： WANG Xiaodong HUANG Yujiao ZHANG Xiaoxiao feng xianshe HUANG Wei Key Laboratory of Coal Science and Technology of Ministry of EducaO'on and Shanxi Province Taiyuan University of Technology Taiyuan 030024 P. R. China Department of Chemical Engineering University of Waterloo Waterloo Ontario Canada N2L 3G1

Hydrophilic acid-resistant Ge-ZSM-5 membranes were synthesized via secondary growth method on porous a-A1203 substrates with Silicalite-1 zeolite as seeds. The membranes were characterized by means of scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectrometer to look into the microstructures and element contents of the membranes. The separation performance of the membranes was investigated for separating water from acetic acid solution by pervaporation. The results show that membranes fabricated by the conventional secondary growth method have a high flux, but the selectivity of them is rather limited. Preheating the secondary synthesis sol and using the supernatant as the secondary synthesis sol for membrane fabrication were found to be ef- fective to lower the concentration of the nutrient to constrain re-nucleation, at the same time, lower the A1 content in the membranes. The membrane obtained exhibited improved separation performance with a separation factor of 83 at a flux of 0.67 ***-2.h-1 at 353 K for a feed concentration of 98% acetic acid solution.

关键词： Ge-ZSM-5 membrane Silicalite-1 seed Preheating secondary synthesis sol method

Preparation of erbium ion-doped TiO2 films and the study of their photocatalytic activity under simulated solar light

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Journal of Semiconductors 2017年第11期38卷 31-38页

作者： Hongfei Lin Yujiao Huang Shaoni Li Chunhui Luan Wei Huang Xiaodong Wang xianshe feng Key Laboratory of Coal Science and Technology of the Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan 030024 China

A series of erbium ion-doped TiO2（Er^3＋-TiO2） films were prepared by a sol-gel dip/spin coating method, and the effect of the dosage of erbium ion（0-2.0 mol%）, the films coating layers（1-5 layers）, and calcination temperature（400-700 ℃） on the film structure and photocatalytic activity were investigated in detail. The films were characterized by means of X-ray diffraction（XRD）, scanning electron microscopy（SEM）, thermal analysis（TG-DTG） and UV-Vis diffusive reflectance spectra（DRS）. The results showed that the films were composed of anatase, and no other TiO2 phases（rutile and brookite）. With the increase of the erbium ion dosage, the crystal size decreased. Erbium ion doping could enhance the thermal stability of TiO2 and inhibit the increase of the crystallite size. Meanwhile doping of erbium ions gave rise to three typical absorption peaks within the range of visible light（400-700 nm）, locating at 490, 523, and 654 nm, attributed to the transition of 4 f electrons. The higher calcination temperature led to higher crystallinity and bigger crystal grains. The photocatalytic performance of the films was evaluated by degradation of methyl orange solution under simulated solar light. The highest quality film we prepared was with 4 layers, 1.0 mol% dosage of erbium ion, and the calcination temperature of 500 ℃. With this film,the degradation percentage of 7.8 mg/L methyl orange solution was up to 53.3% under simulated solar light after 6 h photoreaction.

关键词： erbium ion-doped titania films photocatalysis

间歇反应器内醋酸丁酯酯化反应与渗透汽化集成过程的模型计算(英文)

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催化学报 2010年第8期31卷 999-1005页

作者：邹昀童张法刘琨冯献社广西大学化学化工学院广西南宁530004 滑铁卢大学化工系加拿大安大略省滑铁卢N2L3G1

建立了一个间歇反应器内酯化反应与渗透汽化集成过程的数学模型,用于描述反应和脱水同时进行的过程.该模型考虑了反应体系中所有组分的渗透量影响以及混合物的非理想热力学行为.选择乙酸和正丁醇生成醋酸丁酯的酯化反应与PVA膜渗透汽化... 详细信息

建立了一个间歇反应器内酯化反应与渗透汽化集成过程的数学模型,用于描述反应和脱水同时进行的过程.该模型考虑了反应体系中所有组分的渗透量影响以及混合物的非理想热力学行为.选择乙酸和正丁醇生成醋酸丁酯的酯化反应与PVA膜渗透汽化集成过程为研究体系,将模型结果与文献中已报道的实验数据进行对比,验证了该模型的有效性.结果表明,采用渗透汽化脱除酯化反应的水分将提高酯的产率.对温度、反应物初始比、膜面积与反应体积比以及催化剂浓度几种操作条件对集成过程性能影响进行了参数的分析.根据结果讨论得到该膜过程与反应集成过程的优化操作条件.

关键词：渗透汽化酯化反应渗透集成过程集成因子

Synthesis of superior hydrophilic and acid-resistant Ge-ZSM-5 membranes by simultaneously incorporating Ge and Al into Silicalite-1 framework

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Synthesis of superior hydrophilic and acid-resistant Ge-ZSM-...

超疏水石墨烯/甲醛-三聚氰胺-亚硫酸氢钠共聚物海绵的制备及其在油水分离中的应用

第十七届全国分子筛学术大会

作者： Xiaodong Wang Xuan Deng Zhongxiang Bai Wei Huang xianshe feng Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of Technology Department of Chemical Engineering University of Waterloo

A novel method to fabricate superior hydrophilic and acid-resistant zeolite membranes was presented. It was based on simultaneously incorporating a suitable amount of Ge and Al into Silicalite-1 framework, and the Ge-ZSM-5 membranes so obtained showed outstanding performance for dehydration of acetic acid and ethanol by pervaporation. Over a broad range of feed concentrations （30-98 wt% acetic acid and 10-98 wt% ethanol）, only water was shown to permeate through the membrane, while ethanol and acetic acid were completely blocked, resulting in an infinitely large separation factors. The feed water concentration was shown to have very little effect on the permeation flux of water. In general, the membrane exhibited a substantially greater permeability than hydrophilic Silicalite-1 membrane reported in the literature.

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复合材料学报 2019年第7期36卷 1728-1736页

作者：魏倩林韶晖冯献社 REMPEL Garry L 潘勤敏苏州大学材料与化学化工学部绿色高分子工程与催化技术实验室苏州215123 Department of Chemical Engineering University of WaterlooWaterloo N2L 3G1

采用两步法合成了石墨烯(GE)改性的超疏水超亲油甲醛-三聚氰胺-亚硫酸氢钠(FMS)共聚物海绵,首先在FMS海绵基质上进行GE原位聚合,然后通过聚甲基苯基硅氧烷构筑超疏水结构。采用FTIR、SEM、TGA、光学接触角测量仪对海绵结构进行表征分析... 详细信息

采用两步法合成了石墨烯(GE)改性的超疏水超亲油甲醛-三聚氰胺-亚硫酸氢钠(FMS)共聚物海绵,首先在FMS海绵基质上进行GE原位聚合,然后通过聚甲基苯基硅氧烷构筑超疏水结构。采用FTIR、SEM、TGA、光学接触角测量仪对海绵结构进行表征分析。结果表明,GE成功地修饰了FMS海绵,制备出的GE/FMS共聚物海绵的接触角达158.9°。将GE/FMS共聚物海绵用于油水分离,经20次对机油吸附-解吸附测定后仍能保持稳定的超疏水性质。改性后的GE/FMS海绵具有良好的可重复利用性且对油和有机溶剂具有高度选择吸收性,对氯仿和机油的吸收量分别达到自身质量的约125倍和90倍,对油或有机溶剂的回收率达到87%以上。进一步对油或有机溶剂与水的分离进行了应用模拟,结果表明:改性后的GE/FMS海绵可以高效快速地将油或有机溶剂从水中分离出来,对于投入生产及吸附应用具有实际意义。

关键词：超疏水共聚物海绵石墨烯油水分离吸附

用PVA膜渗透蒸发分离醋酸丁酯生产体系中的水分

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用PVA膜渗透蒸发分离醋酸丁酯生产体系中的水分

第三届全国化学工程与生物化工年会

作者：邹昀童张法刘琨 feng xianshe 广西大学化学化工学院广西大学化学化工学院广西大学化学化工学院滑铁卢大学化工系

＜正＞本研究首先探讨了聚乙烯醇（PVA）膜用于从正丁醇／水、醋酸／水、醋酸丁酯／水二元系统中分离水的情况,对原料浓度和温度工艺参数对于渗透通量、分离因子和渗透分离指数（PSI）等分离性能的影响进行了研究。结果表明:PVA膜对水... 详细信息

＜正＞本研究首先探讨了聚乙烯醇（PVA）膜用于从正丁醇／水、醋酸／水、醋酸丁酯／水二元系统中分离水的情况,对原料浓度和温度工艺参数对于渗透通量、分离因子和渗透分离指数（PSI）等分离性能的影响进行了研究。结果表明:PVA膜对水的优先渗透超过有机物,膜对四种组分的选择性渗透顺序为:水＞醋酸＞正丁醇＞醋酸丁酯,而且PVA膜对水具有特殊的选择性。二元混合物温度

关键词：渗透蒸发 PVA膜分离因子渗透活化能渗透蒸发指数

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纯溶剂在线性低密度聚乙烯膜中的渗透汽化

化工进展 2010年第6期29卷 995-998页

作者：邹昀刘琨童张法冯献社广西大学化学化工学院广西南宁530004 滑铁卢大学化工系

用渗透汽化实验装置测定了5种常用化工溶剂在线性低密度聚乙烯材料中的渗透性能,考察不同温度对于5种溶剂的渗透通量的影响。通过渗透通量与温度的Arrhenius关系,回归拟合得到各种溶剂的渗透活化能;并采用吸附溶胀实验测定了5种纯溶剂... 详细信息

用渗透汽化实验装置测定了5种常用化工溶剂在线性低密度聚乙烯材料中的渗透性能,考察不同温度对于5种溶剂的渗透通量的影响。通过渗透通量与温度的Arrhenius关系,回归拟合得到各种溶剂的渗透活化能;并采用吸附溶胀实验测定了5种纯溶剂在该膜材料中的平衡吸附量,以此推算出25℃条件下5种溶剂在膜材料内部的扩散系数。结果表明,5种溶剂的渗透通量的顺序为正己烷>正庚烷>环己烷>丙酮>甲基吡咯烷酮,吸附量大小顺序为甲基吡咯烷酮>环己烷>正己烷>正庚烷>丙酮。

关键词：线性低密度聚乙烯渗透汽化溶解扩散渗透活化能

L-Ergothioneine ameliorates MPTP-induced Parkinson's disease in C57BL/6J mice by activating DJ-1

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Food Science and Human Wellness 2024年

作者： xianshe Meng# Huawen Meng# Shuzeng Hou Zequn Yin Xuerui Wang Ke Gong feng Zhang Qingshan Li Shuang Zhang Yuanli Chen Xiaoxiao Yang Zhiwei Zhao Chenzhong Liao Yajun Duan Department of Cardiology， the First Affiliated Hospital of USTC， Division of Life Sciences and Medicine， University of Science and Technology of China Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes， Hefei University of Technology

Parkinson’s disease (PD) is one of the most common neurodegenerative diseases. The loss of dopaminergic (DAergic) neurons in the substantia nigra and the decrease of dopamine (DA) levels accelerate the process of PD. L-Ergothioneine (EGT) is a natural antioxidant derived from microorganisms， especially in edible mushrooms. EGT can penetrate blood-brain barrier and its levels are significantly decreased in the plasma of PD patients. Therefore， we speculated that EGT could ameliorate PD， and determined its effect on PD development by using 1-methyl-4-phenyl-1，2，3，6-tetrahydropyridine (MPTP)-induced PD mouse models and neurotoxin 1-methyl-4-phenylpyridinium (MPP+)-induced cell models. Our results show that EGT alleviated MPTP-induced behavioral dysfunction in mice. Mechanistically， we innovatively revealed that EGT is a key regulator of DJ-1. EGT restored DA levels by activating the DJ-1-Nuclear receptor-related factor 1(Nurr1) axis. Furthermore， it reduced reactive oxygen species (ROS) levels by regulating the DJ-1-Nuclear factor erythroid 2-related factor 2 (Nrf2) pathway， which inhibited oxidative stress-induced DAergic neuronal apoptosis. Combined treatment with DJ-1-siRNA transfection revealed that blocking DJ-1 reversed EGT upregulated Nurr1 and Nrf2 expression in the nucleus， which significantly decreased the benefits of EGT. Taken together， our study suggests that EGT can ameliorate PD and be considered as a strategy for PD treatment.

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气体在均质高分子膜中渗透过程的研究

化工学报 1989年第2期40卷 213-220页

作者：冯献社蒋国梁朱葆琳中国科学院大连化学物理研究所中国科学院大连化学物理研究所大连

本文研究了气体在玻璃态聚合物膜中的渗透行为,提出了Langmuir环境和Henry环境的渗透分离系数的概念,推导出它们与表观分离系数间的关系,分析了压力,组成和温度及膜的玻璃化转变对选择渗透性的影响,验证了双吸着双迁移模型及其扩展形式... 详细信息

本文研究了气体在玻璃态聚合物膜中的渗透行为,提出了Langmuir环境和Henry环境的渗透分离系数的概念,推导出它们与表观分离系数间的关系,分析了压力,组成和温度及膜的玻璃化转变对选择渗透性的影响,验证了双吸着双迁移模型及其扩展形式的适用性.通过理论分析和实验证明探讨了实际中出现的“快气变慢,慢气变快”及“纯气渗透系数之比往往高于实际的混合气渗透分离系数”,指出其并非一般性结论,有时会出现与此相反的结果.

关键词：渗透系数混合气导水率渗透性分离系数迁移模型玻璃态聚合物聚合物膜渗透过程双吸