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Solution-based synthesis of PEDOT:PSS films with electrical conductivity over 6300 S/cm
Yanbin Shi,Yuqin Zhou,Rongzong Shen,Fengzhen Liu,Yurong Zhou 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-
Poly(3,4-ethylenedioxythiophene) mixed with poly (styrenesulfonate) (PEDOT:PSS) is considered as oneof the most valuable conductive polymers due to its high conductivity, transparency and mechanicalflexibility. Many experiments have proved that H2SO4 post-treatment is an effective way to enhance theelectrical conductivity of PEDOT:PSSfilms. Here we reported a method for the fabrication of PEDOT:PSSfilms with conductivity as high as 6323.9 364.5 S/cm, based on a two-step H2SO4 post-treatment. Thisvery high conductivity is, as far as we know, the highest reported value for PEDOT:PSSfilms by solutionpreparation. The removal of PSS and redox reaction are the keys to enhance the conductivity of PEDOT:PSSfilms.
Qin Yilin,Liao Wei,Lan Tu,Li Fengzhen,Li Feize,Yang Jijun,Liao Jiali,Yang Yuanyou,Liu Ning 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.12
Hydroxyurea (HU) is a novel salt-free reductant used potentially for the separation of U/Pu in the advanced PUREX process. In this work, the radiation stability of HU were systematically investigated in solution by examining the effects of the type of rays (a, b, and g irradiations), the absorbed dose (10 e50 kGy), and the HNO3 concentration (0e3 mol L1 ). The influence degree on HU radiolysis rates followed the order of the absorbed dose > the ray type > the HNO3 concentration, but the latter two had moderate effects on HU radiolysis products where NH4 þ and NO2 were found to be the most abundant ones, suggesting that the differences of a, b, and g rays should be considered in the study of irradiation effects. The radiolysis mechanism was explored using density functional theory (DFT) calculations, and it proposed the dominant radiolysis paths of HU, indicating that the radiolysis of HU was mainly a free radical reaction among $H, eaq e , H2O, intermediates, and the radiolytic free radical fragments of HU. The results reported here provide valuable insights into the mechanistic understanding of HU radiolysis under a, b, and g irradiations and reliable data support for the application of HU in the reprocessing of spent fuel.