本研究采用溶胶-凝胶法合成了成分可控、高纯和高活性的Al2 O3-SiO2粉体.以工业级水玻璃为碱激发剂,将二者按照方沸石理论配比(Na∶ Al∶ Si=1∶1∶2)混合后制备得到Na2 O-Al2O3-4SiO2-8H2O地质聚合物凝胶体;将地质聚合物凝胶体在70℃烘箱中养护一定时间后脱模;研究采用X射线衍射(XRD)、扫描电镜(SEM)和BET等对产物进行了表征,无模板剂的条件下利用240℃水热反应制备了50～ 1200μm不同粒径的方沸石晶体,并初步探讨了大尺寸方沸石晶体的形成机理.
参考文献
| [1] | Shang Zhang;Xuemin Cui;Le-ping Liu;Wei-peng Zhang .A novel chemosynthetic method for the production of nitrate sodalite[J].Materials Letters,2010(24):2667-2669. |
| [2] | 崔学民,邱树恒,曹德光,周济.水对碱矿渣胶凝材料介电性能的影响（Ⅰ）[J].硅酸盐学报,2007(06):791-795. |
| [3] | 蒋荣立,孔德顺,夏小波,陈文龙.偏高岭石-碱-硅酸钠水热反应体系13X分子筛的合成[J].硅酸盐学报,2008(06):832-837. |
| [4] | He Yan;Cui Xue-min;Mao Jin.The hydrothermal transformation of solid geopolymers into zeolites[J].Microporous and mesoporous materials: The offical journal of the International Zeolite Association,2012:187-192. |
| [5] | 常贵环,曹吉林,郭宏飞.聚乙二醇对合成ZSM-5分子筛形貌影响的研究[J].人工晶体学报,2012(05):1357-1361,1375. |
| [6] | 裘式纶.水热/溶剂热体系中沸石分子筛大单晶的生长[J].人工晶体学报,1997(03):285. |
| [7] | Xueying Chen;Minghua Qiao;Songhai Xie .Self-Construction of Core-Shell and Hollow Zeolite Analcime Icositetrahedra: A Reversed Crystal Growth Process via Oriented Aggregation of Nanocrystallites and Recrystallization from Surface to Core[J].Journal of the American Chemical Society,2007(43):13305-13312. |
| [8] | 张平萍,陈雪刚,程继鹏,叶瑛.以坡缕石为原料制备方沸石[J].材料科学与工程学报,2010(04):501-504. |
| [9] | Zheng, GJ;Cui, XM;Zhang, WP;Tong, ZF .Preparation of geopolymer precursors by sol-gel method and their characterization[J].Journal of Materials Science,2009(15):3991-3996. |
| [10] | Itani, L;Liu, Y;Zhang, WP;Bozhilov, KN;Delmotte, L;Valtchev, V .Investigation of the Physicochemical Changes Preceding Zeolite Nucleation in a Sodium-Rich Aluminosilicate Gel[J].Journal of the American Chemical Society,2009(29):10127-10139. |
| [11] | S. Qiu;J. Yu;G. Zhu;O. Terasaki;Y. Nozue;W. Pang;R. Xu .Strategies for the synthesis of large zeolite single crystals[J].Microporous and Mesoporous Materials,1998(4/6):245-251. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%