Ultralow-temperature hydrothermal synthesis of Zn-Mn spinel nanocrystals: Its defect spinel of lambda-MnO2 prepared by a soft chemical method

作者：Xue Lili; Wu Zhong Shuai; Ge Chunhua; Zhang Xiang Dong^*

来源：Materials Chemistry and Physics, 2013, 138(1): 124-130.

DOI：10.1016/j.matchemphys.2012.11.029

• Hydrothermal
• Spinel
• Zinc manganese oxide
• MnO2
• Redox
• Soft chemical method

An ultralow-temperature hydrothermal strategy was for the first time reported to synthesize spinel-type zinc manganese oxide (ZnMn2O4) nanocrystals at 70 degrees C. The synthetic parameters including hydrothermal temperature, zinc or manganese source, hydrothermal time, and NaOH concentration were systematically investigated. The structure and morphology characterization revealed that the resulting Zn-Mn spinels are tetragonal-phase, and have well-defined crystalline structure with the size of 10-20 nm. Furthermore, a defect spinel of lambda-MnO2 nanocrystal (10-20 nm) was directly synthesized from ZnMn2O4 nanocrystal upon acid leaching. Finally, a redox mechanism for the formation of lambda-MnO2 was discussed.

• 出版日期2013-2-15
• 单位辽宁大学