TY - JOUR
T1 - An ultra-sensitive room temperature toluene sensor based on molten-salts modified carbon nitride
AU - Wang, Zijing
AU - Gu, Zhanyong
AU - Wang, Fen
AU - Hermawan, Angga
AU - Hirata, Shingo
AU - Asakura, Yusuke
AU - Hasegawa, Takuya
AU - Zhu, Jianfeng
AU - Inada, Miki
AU - Yin, Shu
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (51472153, 51572158, 51972200) and the Graduate Innovation Fund of Shaanxi University of Science & Technology. The Japan Society funded the present work for the Promotion of Science (JSPS) Grant-in-Aid for the Scientific Research (KAKENHI) on Innovative Areas “Mixed Anion” (No. 16H06439, 16H06440), and Grants Number (20H00297), the Nippon Sheet Glass Foundation for Materials Science and Engineering, and by the Dynamic Alliance for Open Innovations Bridging Human, Environment and Materials, the Cooperative Research Program of “Network Joint Research Centre for Materials and Devices.”
Publisher Copyright:
© 2021 The Society of Powder Technology Japan
PY - 2021/11
Y1 - 2021/11
N2 - In this work, two-dimensional crystalline C3N4 (CCN) was obtained by promoting the self-condensation reaction of dicyandiamide in an air atmosphere via the molten salt method. Studies show that compared with polymer-C3N4 (PCN) ((9.8 m2/g)), CCN has a larger specific surface area (77.1 m2/g)) and better crystallinity. Additionally, the resistance of CCN in the air is 40 MΩ, 1250 times lower than that of polymer-C3N4 (PCN) (∼50000 MΩ). Secondly, when 50 ppm toluene gas analysis flows into the CCN based gas sensor at room temperature, the gas response value is 350. The CCN based gas sensor works for 60 days, or after 25 cycles continuously, the gas response value remains at about 350 (Rg/Ra), which is due to the excellent crystallinity, optimized π conjugate system, and enhanced interlayer van der Waals of CCN. Additionally, the critical effect of crystallinity on the gas sensitivity of carbon nitride is also discussed in detail.
AB - In this work, two-dimensional crystalline C3N4 (CCN) was obtained by promoting the self-condensation reaction of dicyandiamide in an air atmosphere via the molten salt method. Studies show that compared with polymer-C3N4 (PCN) ((9.8 m2/g)), CCN has a larger specific surface area (77.1 m2/g)) and better crystallinity. Additionally, the resistance of CCN in the air is 40 MΩ, 1250 times lower than that of polymer-C3N4 (PCN) (∼50000 MΩ). Secondly, when 50 ppm toluene gas analysis flows into the CCN based gas sensor at room temperature, the gas response value is 350. The CCN based gas sensor works for 60 days, or after 25 cycles continuously, the gas response value remains at about 350 (Rg/Ra), which is due to the excellent crystallinity, optimized π conjugate system, and enhanced interlayer van der Waals of CCN. Additionally, the critical effect of crystallinity on the gas sensitivity of carbon nitride is also discussed in detail.
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U2 - 10.1016/j.apt.2021.09.027
DO - 10.1016/j.apt.2021.09.027
M3 - Article
AN - SCOPUS:85115638550
SN - 0921-8831
VL - 32
SP - 4198
EP - 4209
JO - Advanced Powder Technology
JF - Advanced Powder Technology
IS - 11
ER -