کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
676150 887759 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation, thermal decomposition and lifetime of Eu(III)-phenanthroline complex doped xerogel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Preparation, thermal decomposition and lifetime of Eu(III)-phenanthroline complex doped xerogel
چکیده انگلیسی

The main purpose of this work is proposing a new method of using non-isothermal formal kinetics analysis to predict the lifetime of luminescent complex materials. The Eu(III)-phenanthroline complex doped xerogel has been in situ synthesized by a catalyst-free sol–gel method. The photoluminescence spectra and TG curves of the xerogel verify the formation and decomposition of Eu(III)-phenanthroline complex in xerogel. The decomposition of the xerogel formally occurs in three steps. The Friedman and FWO isoconversional methods and multivariate non-linear regression method are used for formal kinetic analysis. The overall decomposition process below 800 °C is fitted by three-step consecutive reaction. The best fitted model for each step is Fn (n order reaction, the corresponding function f(α) is (1 − α)n). Correlation coefficient is 0.99956. The lifetime values of xerogel at different temperatures are predicted based on non-isothermal kinetic models by the 5% decomposition of europium organic complex.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 440, Issue 1, 1 January 2006, Pages 31–35
نویسندگان
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