纳米技术

Vol.5 No.1 (February 2015)

粒径相同形貌不同的纳米氧化亚铜的标准摩尔生成焓值
Standard Molar Enthalpy of Formation of Nano Cuprous Oxide with Similar Particle Sizes but Different Morphologies

 

作者:

朱子富 , 倪孜斌 , 王婧吟 , 胡士祥 , 李小竹 , 吴新民 :北京石油化工学院化学工程学院,北京

 

关键词:

纳米氧化亚铜不同形貌微热量热仪热力学循环标准摩尔生成焓Nano Cuprous Oxide Different Morphologies Micro-Calorimeter Thermodynamic Cycle Standard Molar Enthalpy of Formation

 

摘要:

文章中合成了四种粒径相近,形貌不同的纳米氧化亚铜,并进行了XRD和SEM表征,知其形貌分别为球形, 立方块,六棱柱,六角形,其粒径均在20 nm左右。根据盖斯定律设计了热循环,并通过RD496-2000微热量热仪对热循环中的反应物与生成物进行溶解焓测定,经计算得到标准摩尔生成焓,其值分别为(−77.284 ± 0.191) kJ/mol, (−136.084 ± 0.194) kJ/mol, (−137.114 ± 0.203) kJ/mol, (−162.114 ± 0.220) kJ/mol。由此得到纳米氧化亚铜的标准摩尔生成焓因形貌不同而不同的结论,且形貌差别越大,标准生成焓值差别也越大。

Four kinds of nano cuprous oxide with similar particle sizes but different morphologies were syn-thesized. According to the XRD and SEM pictures, their particle sizes were about 20 nm, and the morphologies were determined as sphere, cube, hexagonal prism and hexagon. A thermodynamic cycle was designed according to the law of Hess. The dissolution enthalpy of reactants and products were determined by RD496-2000 micro-calorimeter based on the designed thermodynamic cycle. And then the standard molar enthalpies of nano cuprous oxide were calculated. They are (−77.284 ± 0.191) kJ/mol, (−136.084 ± 0.194) kJ/mol, (−137.114 ± 0.203) kJ/mol and (−162.114 ± 0.220) kJ/mol. The results show that the bigger difference of the morphologies of nano cuprous oxide, the bigger difference of the standard molar formation enthalpies.

文章引用:

朱子富 , 倪孜斌 , 王婧吟 , 胡士祥 , 李小竹 , 吴新民 (2015) 粒径相同形貌不同的纳米氧化亚铜的标准摩尔生成焓值。 纳米技术, 5, 7-15. doi: 10.12677/NAT.2015.51002

 

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