Yunyu Dai

Ministry of Education of the People's Republic of China

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Xiaomeng Zhang

Jinan University

Yang Yang

Nantong University

Ran Tao

Hebei Medical University

Cheng Tang

Xi'an University of Technology

Gangwei Shi

National Engineering Research Center of Electromagnetic Radiation Control Materials

Yaqian Zhao

University College Dublin

Xiaoyan Tang

Sichuan Normal University

Weifeng Ruan

Jinan University

Xiaohui Zhao

Hebei University

Bin Ji

Shenzhen University

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Jinan University

Institute of Hydrobiology

Ministry of Education of the People's Republic of China

Tongji University

University of Electronic Science and Technology of China

Xi'an University of Technology

National Engineering Research Center of Electromagnetic Radiation Control Materials

Jilin University

Chinese Academy of Sciences

Nantong University

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Hydrogen Sensor with Ppb-Level Detection Limit Prepared by Pd-Modified and Bi-Doped Oxidized Ni Foam

SSRN Electronic Journal (2022)

Jiawei Tian Hongchuan Jiang Xiaohui Zhao Gangwei Shi Yunyu Dai

In this work, we propose a hydrogen sensor to realize ppb-level hydrogen detection at a lower temperature. To fabricate the sensor, foamed nickel was thermally oxidized in bismuth oxide vapor to form the Bi-doped oxidized nickel foam, and Pd nanoparticles were further deposited on its surface by magnetron sputtering. This sensor possesses a unique phenomenon, that is, the response of the sensor does not decline due to repeated hydrogen charging and discharging as same as most hydrogen sensors, but keeps increasing and reaches balance eventually. The Bi3+ doping leads to a reduction in the thickness of the NiO hole accumulation layer, which contributes to the high response. The Bi5+ self-doping occurring during the repeated cycle test further promotes oxygen adsorption, so that the sensor response is continuously improved. As a result, the response of the Pd-Bi-OFN sensor to 1% hydrogen is as high as 580% in the air, and the detection limit is as low as 20 ppb at a lower temperature of 75 ˚C. Meanwhile, the sensor possesses high selectivity, great humidity stability, and long durability. This work provides an outstanding guidance to fabricate reliable ppb-level hydrogen sensors.

10.2139/ssrn.4031295

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Insight into the performance discrepancy of GAC and CAC as air-cathode materials in constructed wetland-microbial fuel cell system

The Science of The Total Environment (2021)

Bin Ji Yaqian Zhao Yang Yang Cheng Tang Yunyu Dai

Carbon fibers

10.1016/j.scitotenv.2021.152078

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Citations (24)

Removal of acidic pharmaceuticals by small-scale constructed wetlands using different design configurations

The Science of The Total Environment (2018)