| Dehydration Kinetics of Zinc Phosphate Tetrahydrate α-Zn3（PO4）2·4H2O Nanoparticle |
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| 引用本文： | 袁爱群,吴健,黄在银,周泽广,文衍宣,童张法.Dehydration Kinetics of Zinc Phosphate Tetrahydrate α-Zn3（PO4）2·4H2O Nanoparticle[J].中国化学,2007,25(6):57-862. |
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| 作者姓名： | 袁爱群 吴健 黄在银 周泽广 文衍宣 童张法 |
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| 作者单位： | [1]School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China [2]College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning, Guangxi 530006, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20566003）, and Youth Science Foundation （No. 0339012） of Guangxi, China. |
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| 摘 要： | TG-DTG technique and Harcourt-Esson integrated equation were used to study the dehydration process of zinc phosphate tetrahydrate α-Zn3（PO4）2·4H2O nanoparticle and its thermal decomposition kinetics. The results show that there are three stages of dehydration between 300 and 800 K during the thermal decomposition of α-Zn3（PO4）2·4H2O nanoparticle. The first stage is controlled by chemical reaction with an activation energy of 69.48 kJ·mol^-1 and a pre-exponential factor of 1.77×10^6 s^-1. The second is controlled by nucleation and growth with an activation energy of 78.74 kJ·mol^-1 and a pre-exponential factor of 5.86×10^9 s^-1. The third is controlled by nucleation and growth with an activation energy of 141.5 kJ·mol^-1 and a pre-exponential factor of 1.01×10^12 s^-1. The kinetic compensative effects not only exist in Arrhenius equation but also in Harcourt-Esson equation. Activation energy E is dependent on both the decomposition fraction α and temperature T.
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| 关 键 词： | 磷酸锌四水合物 纳米颗粒 脱水作用 动力学 |
| 修稿时间： | 2006-06-28 |
Dehydration Kinetics of Zinc Phosphate Tetrahydrate α-Zn3（PO4）2·4H2O Nanoparticle |
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| YUAN, Ai-Qun WU, Jian HUANG, Zai-Yin ZHOU, Ze-Guang WEN, Yan-Xuan TONG, Zhang-Fa.Dehydration Kinetics of Zinc Phosphate Tetrahydrate α-Zn3（PO4）2·4H2O Nanoparticle[J].Chinese Journal of Chemistry,2007,25(6):57-862. |
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| Authors: | YUAN Ai-Qun WU Jian HUANG Zai-Yin ZHOU Ze-Guang WEN Yan-Xuan TONG Zhang-Fa |
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| Institution: | a School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China; b College of Chemistry and Ecology Engineering, Guangxi University for Nationalities, Nanning, Guangxi 530006, China |
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| Abstract: | TG‐DTG technique and Harcourt‐Esson integrated equation were used to study the dehydration process of zinc phosphate tetrahydrate α‐Zn3(PO4)2·4H2O nanoparticle and its thermal decomposition kinetics. The results show that there are three stages of dehydration between 300 and 800 K during the thermal decomposition of α‐Zn3(PO4)2·4H2O nanoparticle. The first stage is controlled by chemical reaction with an activation energy of 69.48 kJ·mol?1 and a pre‐exponential factor of 1.77×106 s?1. The second is controlled by nucleation and growth with an activation energy of 78.74 kJ·mol?1 and a pre‐exponential factor of 5.86×109 s?1. The third is controlled by nucleation and growth with an activation energy of 141.5 kJ·mol?1 and a pre‐exponential factor of 1.01×1012 s?1. The kinetic compensative effects not only exist in Arrhenius equation but also in Harcourt‐Esson equation. Activation energy E is dependent on both the decomposition fraction α and temperature T. |
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| Keywords: | α-Zn3（PO4）2·4H2O nanoparticle dehydration non-isothermal kinetics thermal decomposition kinetics |
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