公开(公告)号：US20230285905A1

公开(公告)日：2023-09-14

申请号：US18055602

申请日：2022-11-15

Applicant: Beijing Normal University, Zhuhai

Inventor： Yi Yang ,  Huiqi ZHU ,  Xuhui XU ,  Lulu BAO ,  Ruikun XU ,  Yuxi LONG ,  Chenyang ZHENG ,  Haowen LIN ,  Yinuo WANG ,  Minyi LIU ,  Xintong YOU ,  Ying Li

IPC: B01D67/00 ,  C02F1/48 ,  B01D71/28 ,  B01D71/42 ,  C02F1/44

CPC classification number: B01D67/0002 ,  C02F1/48 ,  B01D71/281 ,  B01D71/421 ,  C02F1/44 ,  C02F2101/30

Abstract: The present disclosure provides an efficient and stable magnetic nanofiber membrane and a preparation method and use thereof, and belongs to the technical field of composites. The preparation method includes the following steps: dissolving polyacrylonitrile or polystyrene, nZVI particles, and n-octyltrimethylammonium bromide in N,N-dimethylformamide, and mixing uniformly to obtain a spinning solution; subjecting the spinning solution to electrospinning; and vacuum-drying a resulting fiber membrane to obtain the efficient and stable magnetic nanofiber membrane. In the present disclosure, the magnetic nanofiber membrane has a high specific surface area, a desirable porosity, an excellent mechanical strength, and satisfactory magnetic properties. The membrane effectively exerts a synergistic effect of the nZVI particles and an organic polymer material carrier, avoids easy oxidation of a catalyst surface and easy particle agglomeration, enhances a catalytic activity of the magnetic nanofiber membrane, and improves an efficiency in organic wastewater treatment.

公开(公告)号：US11638910B1

公开(公告)日：2023-05-02

申请号：US17973161

申请日：2022-10-25

Applicant: Beijing Normal University, Zhuhai

Inventor： Yi Yang ,  Yinuo Wang ,  Haowen Lin ,  Chenyang Zheng ,  Ruikun Xu ,  Huiqi Zhu ,  Xuhui Xu ,  Lulu Bao

IPC: B01J20/20 ,  B01J20/02 ,  B01J20/28 ,  B01J20/32 ,  B01J20/30 ,  C02F101/10 ,  C02F1/28

Abstract: A preparation method of a lanthanum-iron-loaded carbon nanotube film for environmental restoration is provided, it belongs to the technical field of composite materials. The preparation method includes: mixing carbon nanotubes with a lanthanum-iron mixed solution to obtain a suspension, then obtaining a first reaction solution by a constant temperature oscillation reaction; adding alkali liquor into the first reaction solution to obtain a second reaction solution by an oscillation reaction; carrying out a solid-liquid separation on the second reaction solution, adding the obtained solid after drying into an organic solution, and obtaining a third reaction solution by ultrasonic mixing; centrifuging the third reaction solution to obtain a supernatant; obtaining a lanthanum-iron-loaded carbon nanotube film by suction filtration. Compared with powdered adsorbent and single adsorbent, the material prepared by the preparation method has advantages of strong stability, high adsorption efficiency, good regeneration effect, high recycling efficiency, and low production.

公开(公告)号：US20230286834A1

公开(公告)日：2023-09-14

申请号：US18117445

申请日：2023-03-05

Applicant: Beijing Normal University, Zhuhai

Inventor： Yi Yang ,  Lulu Bao ,  Huiqi Zhu ,  Xuhui Xu ,  Yinuo Wang ,  Yuxi Long ,  Ruikun Xu ,  Haowen Lin ,  Chenyang Zheng

IPC: C02F1/44 ,  B01J37/32 ,  B01J37/08 ,  B01D71/42 ,  B01D71/28 ,  B01D69/12 ,  B01J23/745

CPC classification number: C02F1/44 ,  B01J37/32 ,  B01J37/08 ,  B01D71/421 ,  B01D71/281 ,  B01D69/1213 ,  B01J23/745 ,  C02F2101/30

Abstract: A preparation method of a gradient long-effective catalytic membrane with high-strength and anti-deposition property is provided and includes: adding a nanometal oxide catalyst into an N, N-dimethylformamide solution of polyacrylonitrile or polystyrene, uniformly mixing, performing electrostatic spinning, keeping a receiver at −190° C. to −200° C. in the electrostatic spinning process, and performing freeze drying on a precursor membrane obtained after the electrostatic spinning is finished, so as to obtain the gradient long-effective catalytic membrane. According to the method, the gradient long-effective catalytic membrane with high-strength and anti-deposition property is obtained through a one-step method which adopts an ultralow-temperature-electrostatic spinning technology and combines with nanometal, the contradictory relation between the catalytic efficiency and the membrane stability in a traditional catalytic membrane is solved, the catalytic performance of the membrane is fully played, the organic polluted wastewater can be efficiently catalytically degraded, and the service life of the catalytic membrane is prolonged.

公开(公告)号：US11746026B1

公开(公告)日：2023-09-05

申请号：US18117445

申请日：2023-03-05

Applicant: Beijing Normal University, Zhuhai

Inventor： Yi Yang ,  Lulu Bao ,  Huiqi Zhu ,  Xuhui Xu ,  Yinuo Wang ,  Yuxi Long ,  Ruikun Xu ,  Haowen Lin ,  Chenyang Zheng

IPC: C02F1/44 ,  B01J37/32 ,  B01J37/08 ,  B01D71/28 ,  B01D69/12 ,  B01J23/745 ,  B01D71/42 ,  C02F101/30

CPC classification number: C02F1/44 ,  B01D69/1213 ,  B01D71/281 ,  B01D71/421 ,  B01J23/745 ,  B01J37/08 ,  B01J37/32 ,  C02F2101/30

Abstract: A preparation method of a gradient long-effective catalytic membrane with high-strength and anti-deposition property is provided and includes: adding a nanometal oxide catalyst into an N, N-dimethylformamide solution of polyacrylonitrile or polystyrene, uniformly mixing, performing electrostatic spinning, keeping a receiver at −190° C. to −200° C. in the electrostatic spinning process, and performing freeze drying on a precursor membrane obtained after the electrostatic spinning is finished, so as to obtain the gradient long-effective catalytic membrane. According to the method, the gradient long-effective catalytic membrane with high-strength and anti-deposition property is obtained through a one-step method which adopts an ultralow-temperature-electrostatic spinning technology and combines with nanometal, the contradictory relation between the catalytic efficiency and the membrane stability in a traditional catalytic membrane is solved, the catalytic performance of the membrane is fully played, the organic polluted wastewater can be efficiently catalytically degraded, and the service life of the catalytic membrane is prolonged.

公开(公告)号：US20230125135A1

公开(公告)日：2023-04-27

申请号：US17973161

申请日：2022-10-25

Applicant: Beijing Normal University, Zhuhai

Inventor： Yi Yang ,  Yinuo Wang ,  Haowen Lin ,  Chenyang Zheng ,  Ruikun Xu ,  Huiqi Zhu ,  Xuhui Xu ,  Lulu Bao

IPC: B01J20/20 ,  B01J20/02 ,  B01J20/28 ,  B01J20/32 ,  B01J20/30

Abstract: A preparation method of a lanthanum-iron-loaded carbon nanotube film for environmental restoration is provided, it belongs to the technical field of composite materials. The preparation method includes: mixing carbon nanotubes with a lanthanum-iron mixed solution to obtain a suspension, then obtaining a first reaction solution by a constant temperature oscillation reaction; adding alkali liquor into the first reaction solution to obtain a second reaction solution by an oscillation reaction; carrying out a solid-liquid separation on the second reaction solution, adding the obtained solid after drying into an organic solution, and obtaining a third reaction solution by ultrasonic mixing; centrifuging the third reaction solution to obtain a supernatant; obtaining a lanthanum-iron-loaded carbon nanotube film by suction filtration. Compared with powdered adsorbent and single adsorbent, the material prepared by the preparation method has advantages of strong stability, high adsorption efficiency, good regeneration effect, high recycling efficiency, and low production.