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| 复合白云石表面链状纳米CaCO_3的制备 | |
| 引用本文： | 周守发,杨玉芬,王启宝,董怀,何剑,盖国胜.复合白云石表面链状纳米CaCO_3的制备[J].中国矿业大学学报,2009,38(5). |
| 作者姓名： | 周守发 杨玉芬 王启宝 董怀 何剑 盖国胜 |
| 作者单位： | 1. 中国矿业大学,化学与环境工程学院,北京,100083;清华大学,先进材料教育部重点实验室,北京,100084 2. 清华大学,先进材料教育部重点实验室,北京,100084;河北清华发展研究院,微纳米材料与综合利用研发中心,河北,廊坊,065001 3. 中国矿业大学,化学与环境工程学院,北京,100083 4. 浙江清华长三角研究院,粉体及新材料工程中心,浙江,长兴,313100 5. 清华大学,先进材料教育部重点实验室,北京,100084 |
| 基金项目： | 国家科技支撑计划，广东省教育部产学研结合项目 |
| 摘 要： | 在Ca(OH)_2-H_2O-CO_2反应体系中,根据非均匀成核原理,通过调整体系反应温度、Ca(OH)_2浓度、ZnSO_4添加量等反应参数,控制在白云石颗粒表面生成具有链状结构的纳米Ca-CO_包覆层.利用SEM,XRD等检测表征手段,分析了不同反应参数对纳米CaCO_3晶形的影响.结果表明:当反应温度为25℃,ZnSO_4加入量为Ca(OH)_2的4%,Ca(OH)_2浓度为0.3mol/L时,在白云石颗粒表面生成了长径比为7:1的链状纳米CaCO_3.提高体系的反应浓度能够减少ZnSO_4的加入量. |
| 关 键 词： | 复合白云石 链状 纳米CaCO_3 |
Preparation of Chain-Like Nano Carbonate on Composite Dolomite Surface |
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| ZHOU Shou-fa,YANG Yu-fen,WANG Qi-bao,DONG Huai,HE Jian,GAI Guo-sheng.Preparation of Chain-Like Nano Carbonate on Composite Dolomite Surface[J].Journal of China University of Mining & Technology,2009,38(5). | |
| Authors: | ZHOU Shou-fa YANG Yu-fen WANG Qi-bao DONG Huai HE Jian GAI Guo-sheng |
| Abstract: | Based on the principle of heterogeneous nucleation, the reaction parameters including temperature, calcium hydroxide concentration and zinc sulfate additive, were adjusted. The chain-like nano calcium carbonate coating layer was formed on the composite dolomite surface in the Ca(OH)_2-H_2O-CO_2 system. The effects of different reaction parameters on the shape of nano calcium carbonate were analyzed using SEM and XRD. The results indicate that a chain-like nano calcium carbonate was formed on the dolomite particle surface when the reaction temperature is 25℃, zinc sulfate is 4% of calcium hydroxide weight, calcium hydroxide con-centration is 0.3 mol/L. The aspect ratio of nano calcium carbonate is 7:1. Enhancing the re-action concentration of system can reduce the weight of zinc sulfate. |
| Keywords: | ZnSO_4 composite dolomite chain-like nano calcium carbonate zinc sulfate |
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