US 12,258,703 B2
Method for preparation of plasma-treated nanofiber-based hydrogen gas sensing material
Feipeng Wang, Chongqing (CN); Kelin Hu, Chongqing (CN); Zijia Shen, Chongqing (CN); Hongcheng Liu, Chongqing (CN); Jianglin Xiong, Chongqing (CN); Jian Li, Chongqing (CN); Youyuan Wang, Chongqing (CN); Weigen Chen, Chongqing (CN); Lin Du, Chongqing (CN); Kaizheng Wang, Chongqing (CN); and Qi Zhao, Chongqing (CN)
Assigned to CHONGQING UNIVERSITY, Chongqing (CN)
Appl. No. 17/906,072
Filed by CHONGQING UNIVERSITY, Chongqing (CN)
PCT Filed Dec. 24, 2020, PCT No. PCT/CN2020/138764
§ 371(c)(1), (2) Date Sep. 11, 2022,
PCT Pub. No. WO2021/179735, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 202010168936.0 (CN), filed on Mar. 12, 2020.
Prior Publication US 2023/0116126 A1, Apr. 13, 2023
Int. Cl. D01D 1/02 (2006.01); D01D 5/00 (2006.01); D01D 10/02 (2006.01); D01F 1/10 (2006.01); D01F 6/26 (2006.01); D06M 10/02 (2006.01); G01N 33/00 (2006.01); D06M 101/18 (2006.01)
CPC D06M 10/025 (2013.01) [D01D 1/02 (2013.01); D01D 5/003 (2013.01); D01D 10/02 (2013.01); D01F 1/10 (2013.01); D01F 6/26 (2013.01); G01N 33/005 (2013.01); D06M 2101/18 (2013.01); D10B 2321/08 (2013.01); D10B 2401/16 (2013.01); D10B 2505/00 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for preparation of a plasma-treated nanofiber-based hydrogen gas sensing material, comprising the following steps:
(1) stirring a mixed solution of absolute ethanol, polyvinyl pyrrolidone (PVP), N,N-dimethylformamide (DMF), SnCl2·H2O, and Zn(CH3COO)2·2H2O uniformly on a constant-temperature magnetic stirrer to obtain a spinning solution;
(2) electrospinning the spinning solution and depositing on an aluminum foil to obtain a spinning fiber;
(3) annealing the spinning fiber in a muffle furnace to obtain a hydrogen gas sensing material sample; and
(4) subjecting the hydrogen gas sensing material sample to a vacuum argon plasma treatment with a Hall ion source to obtain the nanofiber-based hydrogen gas sensing material,
wherein in step (1), the SnCl2·H2O and the Zn(CH3COO)2·2H2O have a mass ratio of (1-1.6):(1-1.6), and the absolute ethanol, the DMF, and the PVP have a volume ratio of (1-1.5):(1-1.5):(1-1.5), and
wherein in step (4), the vacuum argon plasma treatment comprises the following steps: placing the hydrogen gas sensing material sample into a vacuum chamber; conducting vacuumization with an air pump and a molecular pump to a vacuum degree of 5×10−3 Pa, and introducing 3 sccm to 5 sccm of argon gas into the vacuum chamber to keep the vacuum degree at 1×10−2 Pa to 5×10−2 Pa; turning on the Hall ion source, adjusting an anode voltage and an anode current, starting timing, and recording a cathode voltage and a cathode current; and when the treatment is completed, turning off the Hall ion source, introducing nitrogen gas, opening the vacuum chamber, and removing the sample to complete the vacuum argon plasma treatment; wherein the vacuum argon plasma treatment is conducted at a cathode voltage of 10 V to 15 V, a cathode current of 8.0 A to 10.0 A, an anode voltage of 120 V to 150 V, and an anode current of 1.0 A to 1.9 A for 5 min to 20 min.