公开(公告)号：US20210198123A1

公开(公告)日：2021-07-01

申请号：US15930454

申请日：2020-05-13

申请人： Tongji University ,  Tianjin Polytechnic University

发明人： Zhiwei WANG ,  Yang LI ,  Hongwei ZHANG ,  Jie WANG ,  Xueye WANG

IPC分类号： C02F1/467 ,  C02F1/461

摘要： A flexible electrocatalytic membrane for removing nitrate from water, a preparation method and use thereof are provided. The method of the present invention includes dropwise adding an aramid fiber solution into deionized water to prepare an aramid nanofiber sol, then reacting an ethanol solution containing 3,4-ethylenedioxythiophene and ferric nitrate with the aramid nanofiber sol to prepare a conductive aramid nanofiber sol, and finally dropwise adding MXene nanosheets ultrasonically pretreated by a tetramethylammonium hydroxide solution into the conductive aramid nanofiber sol to prepare the flexible electrocatalytic membrane. The prepared flexible electrocatalytic membrane possesses good mechanical strength and flexibility, and can not only effectively remove nitrate but also avoid failure of electrocatalytic materials due to surface fouling in the process of electrocatalytic reduction of nitrate, and thus has a long service life.

公开(公告)号：US20210060497A1

公开(公告)日：2021-03-04

申请号：US16882752

申请日：2020-05-26

申请人： Tongji University ,  Tianjin Polytechnic University

发明人： Zhiwei WANG ,  Yue WEN ,  Hongwei ZHANG ,  Jie WANG ,  Yingqing CHEN ,  Zhichao WU

IPC分类号： B01D69/12 ,  B01D61/02 ,  B01D71/56 ,  B01D65/08 ,  B01D69/02 ,  B01D67/00 ,  C02F1/44 ,  C07F1/08

摘要： A thin-film composite polyamide reverse osmosis membrane with anti-bacterial and anti-biofouling effects and a preparation method thereof are disclosed. The preparation method includes: dissolving a highly water-stable metal organic framework CuBTTri in an n-hexane solution containing trimesoyl chloride by ultrasonic wave, immersing a polyethersulfone ultrafiltration membrane in an aqueous solution of m-phenylene diamine and taking out, and then immersing the ultrafiltration membrane in the trimesoyl chloride-n-hexane solution containing the aforementioned metal organic framework for reaction and modification, so as to obtain the thin-film composite polyamide reverse osmosis membrane. The resulting composite reverse osmosis membrane integrated with the anti-bacterial metal organic framework CuBTTri has a high reverse osmosis membrane permeability and possesses greatly improved and persistent anti-bacterial and anti-biofouling properties. The preparation method is simple and conducive to promotion, and has mild conditions.

公开(公告)号：US20170072366A1

公开(公告)日：2017-03-16

申请号：US15363203

申请日：2016-11-29

申请人： TONGJI UNIVERSITY

发明人： Qiaoying WANG ,  Jie WANG ,  Zhiwei WANG ,  Zhichao WU ,  Yanqiang MA ,  Xueye WANG ,  Chen PAN ,  Mei CHEN ,  Zimeng LI ,  Kaili YAN

IPC分类号： B01D61/00 ,  B01D65/08

CPC分类号： B01D61/002 ,  B01D65/08 ,  B01D2313/08 ,  B01D2313/16 ,  B01D2313/54

摘要： To provide a modified forward osmosis (FO) membrane module for flow regime improvement, the FO membrane module includes but not limited to: a water inlet; a water outlet; a forward osmosis (FO) membrane; a frame; and folded plates for improving flow regime in which draw solution is introduced into the water inlet of membrane module, then flowed through flow channels composed by three opposite folded plates vertically arranged on upper and bottom portions of the frame alternatively along horizontal direction with equal space; and drawn out from the water outlet. The flow regime improvement is achieved by increasing number of flow-guide folded plate, which results in the decrease of internal concentration polarization and membrane fouling. Structure of frame is modified to improve flow regime and to satisfy requirement of convenient and reliable connections between numbers of membrane modules in the FO membrane system.

摘要翻译： 为了提供用于流动状态改进的改进的正向渗透（FO）膜模块，FO膜模块包括但不限于：进水口; 出水口 正向渗透（FO）膜; 一个框架; 和折叠板，用于改善流动状态，其中将溶液引入膜组件的进水口，然后通过垂直布置在框架的上部和底部上的三个相对的折叠板组成的流动通道沿水平方向交替地相等空间流动; 并从出水口抽出。 通过增加导流板折叠板的数量来实现流动状态改善，这导致内部浓度偏振和膜污染的降低。 修改框架结构以改善流动状态，满足FO膜系统中膜组件数量之间方便可靠连接的要求。