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Synthesis and Characterization of High Quality AlPO4-5 Large Single Crystals
Guo Chenghua,Guo Zhenya,Jin Qinghua,Li Baohui,Ding Datong*
Author NameAffiliationE-mail
Guo Chenghua College of Physics, Nankai University, Tianjin 300071  
Guo Zhenya College of Physics, Nankai University, Tianjin 300071  
Jin Qinghua College of Physics, Nankai University, Tianjin 300071  
Li Baohui College of Physics, Nankai University, Tianjin 300071  
Ding Datong* College of Physics, Nankai University, Tianjin 300071 dingdt@nankai.edu.cn  
Abstract:
The AlPO4-5 molecular sieve has been synthesized hydrothermally by using tripropylamine (TPA) as the template, and pseudoboehmite and orthophosphoric acid as aluminum and phosphorus sources, respectively. The single crystals of AlPO4-5 with different sizes have been obtained by varying the molar ratio of reactants and the crystallization conditions (such as the temperature and time). The typical molar ratio of the reactive mixture is Al2O3∶P2O5∶TPA∶C2H5OH∶H2O∶HF=1∶1.2∶2.66∶80∶1000∶0.7, and perfect AlPO4-5 large single crystals with the maximum length up to 2.0 and 0.31 mm transverse dimension have been prepared by crystallizing the mixture at 457 K for 48 h. Scanning Electron Microscopy (SEM) has been employed to observe the sizes and morphologies of the large single crystals of AlPO4-5. The structure of AlPO4-5 single crystal has been refined by the SMART 1000 single crystal diffractometer.
Key words:  AlPO4-5, Large crystals, Synthesis, Structure
FundProject:
高质量AlPO4-5分子筛大单晶的合成与表征
郭成花,郭振亚,金庆华,李宝会,丁大同*
摘要:
以拟薄水铝石作为铝源,正磷酸为磷源,正三丙胺(TPA)作模板剂,采用水热法合成了AlPO4-5分子筛.在不同的反应物配比、温度以及晶化时间条件下,得到了不同尺寸的AlPO4-5分子筛单晶.实验表明,反应物质的摩尔比为Al2O3∶P2O5∶TPA ∶C2H5OH∶H2O∶HF=1∶1.2∶2.66∶80∶1000∶0.7,反应温度为457 K,晶化时间48 h是生成六方AlPO4-5分子筛大单晶较适宜的条件;在该反应条件下合成出纵向尺度最大达到2.0 mm、具有完整六方棱柱形态的AlPO4-5分子筛单晶;部分晶体的横向尺度达到0.31 mm.用扫描电镜观察晶体的形貌;AlPO4-5分子筛晶体结构通过SMART 1000单晶衍射仪鉴定.
关键词:  AlPO4-5  大单晶  合成  结构
DOI:10.1088/1674-0068/18/2/263-267
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