Zn-Cu-codoped SnO2 nanoparticles: Structural, optical, and ferromagnetic behaviors

• 来源期刊: 中国物理B（英文版）
• 关键词: SnO2 nanoparticles Zn-Cu codoping optical band gap energy ferromagnetism
• 年，卷（期）: 2017,（12）
• 页码范围: 397-401
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/12/126104

摘要

Zn-Cu-codoped SnO2 nanoparticles have been synthesized by chemical precipitation method.All nanoparticles are crystalline,with the average size increases from 2.55 nm to 4.13 nm as the calcination temperature increases from 400 ℃ to 600 ℃.The high calcination temperature can enhance the crystalline quality and grain growth.The oxygen content decreases with decreasing calcination temperature;at a low temperature of 400 ℃,Zn-Cu-codoped SnO2 nanoparticles are in a rather oxygen-poor state having many oxygen vacancies.The optical band gap energies of Zn-Cu-codoped SnO2 nanoparticles calcined at 400 ℃ and 600 ℃ are decreased from 3.93 eV to 3.62 eV due to quantum confinement effects.Both samples exhibit room-temperature ferromagnetism,with a larger saturation magnetization at 400 ℃ due to the presence of large density of defects such as oxygen vacancies.Zn-Cu-codoped SnO2 nanoparticles exhibit large optical band gap energies and room temperature ferromagnetism,which make them potential candidates for applications in optoelectronics and spintronics.