摘要
Gd2O3∶Tb3+ luminescent nanoparticles were prepared by the thermal decomposition of the nanosized oxlate prepared in the reverse microemulsions based on triton X-100/n-hexyl alcohol, n-octane, and water. From TG-DTA, XRD and FTIR analyses, the mechanism of thermal decomposition of the nanosized oxalate precursor is suggested as follows: Gd2(C2O4)3·10H2O → Gd2(C2O4)3 + 10H2O, Gd2(C2O4)3 → Gd2O2(CO3) + 3CO +2CO2, Gd2O2(CO3) → Gd2O3 + CO2. The kinetic parameters of thermal decomposition reaction-activation energy E of stage 2 and 3 are 194.6 kJ·mol-1, 110.9 kJ·mol-1, respectively, using Ozawa method. And the reaction order n is 2.9 and 0.43, respectively, according to the TG curves.
Gd2O3：Tb^3＋ luminescent nanoparticles were prepared by the thermal decomposition of the nanosized oxlate prepared in the reverse microemulsions based on triton X-100/n-hexyl alcohol, n-octane, and water. From TG-DTA, XRD and FTIR analyses, the mechanism of thermal decomposition of the nanosized oxalate precursor is suggested as follows： Gd2（C2O4）3·10H2O→ Gd2（C2O4）3 ＋ 10H2O, Gd2（C2O4）3 → Gd2O2（CO3） ＋ 3CO ＋2CO2, Gd2O2（CO3） → Gd2O3 ＋ CO2. The kinetic parameters of thermal decomposition reaction-activation energy E of stage 2 and 3 are 194.6 kJ·mol^-1, 110.9 kJ·mol^-1, respectively, using Ozawa method. And the reaction order n is 2.9 and 0.43, respectively, according to the TG curves.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2006年第1期166-170,共5页
Chinese Journal of Inorganic Chemistry
基金
南京大学固体微结构物理国家重点实验室资助项目(No.M031810)。
关键词
Gd2O3Tb^3+纳米荧光粒子
纳米草酸钆
微乳液法
热解机理
活化能
反应级数
Gd2O3：Tb^3＋ fluorescence nanoparticles
nanosized oxalate
microemulsion
thermal decomposition mechanism
activation energy
reaction order
