| 引用本文: | 杨晨璟,杜景红,甘国友,严继康,易健宏.掺杂TiO2粉体共沉淀包膜过程中的热力学研究[J].材料科学与工艺,2012,20(4):70-75.DOI:10.11951/j.issn.1005-0299.20120413. |
| YANG Chen-jing,DU Jing-hong,GAN Guo-you,YAN Ji-kang,YI Jian-hong.Thermodynamic research on doped TiO2 powders in coprecipitation-coating process[J].Materials Science and Technology,2012,20(4):70-75.DOI:10.11951/j.issn.1005-0299.20120413. |
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| 掺杂TiO2粉体共沉淀包膜过程中的热力学研究 |
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杨晨璟1,2,3, 杜景红1,2,3, 甘国友1,2,3, 严继康1,2,3, 易健宏1,2,3
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1.昆明理工大学 材料科学与工程学院,昆明 650093;2.稀贵及有色金属先进材料教育部重点实验室,昆明 650093;3.云南省新材料制备与加工重点实验室,昆明 650093
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| 摘要: |
| 为了精确控制共沉淀包膜法制备掺杂TiO2粉体的反应条件,本文通过对Men+( Ni2+、La3+、Fe3+、Al3+)在NaHCO3-NH3·H2O体系中离子沉淀反应平衡的热力学分析,得到了Men+-CO32－-NH3·H2O体系中不同总氨浓度cN和总碳浓度cC时各金属离子总浓度与pH值的关系图,并由此确定了金属离子完全沉淀的最佳pH值.热力学分析表明,以NaHCO3-NH3·H2O作为沉淀剂,采用共沉淀包膜法制备掺杂TiO2粉体时,当cN=0.010 mol/L和cC=1.000 mol/L时,反应的适宜沉淀pH为9.0左右. |
| 关键词: 热力学分析 共沉淀包膜 掺杂 TiO2 |
| DOI：10.11951/j.issn.1005-0299.20120413 |
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| 基金项目:云南省自然科学基金资助项目(2008ZC014M,2010ZC19)；昆明理工大学科研基金资助项目(2010-08). |
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| Thermodynamic research on doped TiO2 powders in coprecipitation-coating process |
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YANG Chen-jing1,2,3, DU Jing-hong1,2,3, GAN Guo-you1,2,3, YAN Ji-kang1,2,3, YI Jian-hong1,2,3
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1.Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;2.Key Laboratory of Advance Materials in Rare&Precious and Nonferrous Metals,Ministry of Education,Kunming 650093,China;3.Key Laboratory of Advance Materials of Yunnan Province,Kunming 650093,China
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| Abstract: |
| To precisely control the reaction conditions of doped TiO2 powders prepared by coprecipitation-coating process,the ions precipitation reaction equilibrium of Men+(Ni2+/La3+/Fe3+/Al3+) in NaHCO3-NH3·H2O system was discussed by thermodynamic analysis in this paper.The relation curves between total concentrations of each metal ion and pH value under different total ammonia concentrations cN and total carbon concentrations cC were obtained.Then,the suitable pH of complete precipitation for all metal ions was determined.The results show that when cN is 0.010 mol/L,and cC is 1.000 mol/L,the optimal pH is 9.0 to prepare the doped titanium dioxide powders by coprecipitation-coating process,and the precipitants are NaHCO3 and NH3·H2O. |
| Key words: thermodynamic analysis coprecipitation-coating doping TiO2 |
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