The thermal behavior of the complex Pr[(C5H8NS2)3(C12H8N2)]in a dry nitrogen flow was examined by TG-DTG analysis.The TG-DTG investigations indicated that Pr[(C5H8NS2)3-(C12H8N2)]was decomposed into Pr2S3 and deposite...The thermal behavior of the complex Pr[(C5H8NS2)3(C12H8N2)]in a dry nitrogen flow was examined by TG-DTG analysis.The TG-DTG investigations indicated that Pr[(C5H8NS2)3-(C12H8N2)]was decomposed into Pr2S3 and deposited carbon in one step where Pr2S3 predominated in the final products.The results of non-isothermal kinetic calculations showed that the decomposition stage was the random nucleation and subsequent growth mechanism(n=2/3),the corresponding apparent activation energy?was 115.89 kJ·mol-1 and the pre-expo-nential constant ln[A/s]was 7.8697.The empirical kinetics model equation was proposed as/(α)=3/2(1-α)[-ln(1-α)]1/3.The X-ray powder diffraction patterns of the thermal decomposition products at 800℃under N2 atmosphere show that the product can be indexed to the cubic Pr2S3 phase.The transmission electron microscopy(TEM)of the final product reveals the particle appearance of a diameter within 40 nm.The experimental results show that the praseodymium sulfide nanocrystal can be prepared from thermal decomposition of Pr[(C5H8NS2)3(C12H8N2)].展开更多
基金supported by the National Natural Science Foundation of China(Grant No.20171036)Education Committee of Shannxi Province(No.01JK229)
文摘The thermal behavior of the complex Pr[(C5H8NS2)3(C12H8N2)]in a dry nitrogen flow was examined by TG-DTG analysis.The TG-DTG investigations indicated that Pr[(C5H8NS2)3-(C12H8N2)]was decomposed into Pr2S3 and deposited carbon in one step where Pr2S3 predominated in the final products.The results of non-isothermal kinetic calculations showed that the decomposition stage was the random nucleation and subsequent growth mechanism(n=2/3),the corresponding apparent activation energy?was 115.89 kJ·mol-1 and the pre-expo-nential constant ln[A/s]was 7.8697.The empirical kinetics model equation was proposed as/(α)=3/2(1-α)[-ln(1-α)]1/3.The X-ray powder diffraction patterns of the thermal decomposition products at 800℃under N2 atmosphere show that the product can be indexed to the cubic Pr2S3 phase.The transmission electron microscopy(TEM)of the final product reveals the particle appearance of a diameter within 40 nm.The experimental results show that the praseodymium sulfide nanocrystal can be prepared from thermal decomposition of Pr[(C5H8NS2)3(C12H8N2)].
