1. Ti 3 C 2 T x as a Sensor for SF 6 /N 2 Nitrogen-Containing Fault Decomposition Characteristic Products: A Theoretical Study.
- Author
-
Zeng, Fuping, Qiu, Hao, Feng, Xiaoxuan, Chao, Xianzong, Dai, Liangjun, Yao, Qiang, and Tang, Ju
- Subjects
PRODUCT attributes ,CHEMICAL bonds ,ELECTRON density ,PARTIAL discharges ,RECOVERY rooms ,DENSITY of states ,CHARGE transfer - Abstract
The SF
6 /N2 gas mixture is an alternative gas to SF6 . SF6 /N2 will decompose and generate nitrogenous characteristic gases, such as NO, NO2 , N2 O, and NF3 , when exposed to long-term partial discharge. The adsorption models of Ti3 C2 Tx (T=O, F, OH) and NO, NO2 , N2 O, NF3 were constructed, and the most stable adsorption structure was selected in this paper. The electron density and density of states of the adsorption system were further analyzed to study the adsorption behavior, and the sensing performance was evaluated in the end. The results are as follows: four gases could be spontaneously adsorbed on Ti3 C2 Tx , and strong adsorption occurred when surface terminal groups were OH, forming hydrogen or chemical bonds with significant charge transfer. Results show that Ti3 C2 (OH)2 had a stronger sensing ability than Ti3 C2 F2 and Ti3 C2 O2 . The conductivity of the Ti3 C2 Tx with different terminal groups was improved after the adsorption of NO and NO2 , showing Ti3 C2 Tx had a good sensing ability for NO and NO2 . It was difficult for the four gases to desorb from the Ti3 C2 (OH)2 surface, but the adsorption on the Ti3 C2 F2 , Ti3 C2 O2 surface had a short recovery time at room temperature. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF