摘要
以MgBr_2·6H_2O、Al_2(SO_4)_3·18H_2O为原料,Na_2CO_3-NaHCO_3缓冲对为沉淀剂,合成了优质的Mg_6Al_2(OH)_(13)-SO_4-CO_3-Br·5.5H_2O晶须.样品用XRD、SEM、N2吸附-解吸进行了物相、粒度、晶体形貌结构分析.分析了缓冲对体积分数对LDH-SO_4-CO_3-Br晶须晶形及晶胞参数的影响.结果发现,缓冲对用量在体系中含量的大小对其规整性、板层结构有较大的影响.当缓冲液用量为40%,反应温度T=75?C,反应时间t=212h时可获得晶形好、板层结构显著、规整性好、分散性好的优质LDH-SO_4-CO_3-Br晶须.
High-quality Mg6 Al2(OH)13-SO4-CO3-Br·5.5 H2 O whiskers were synthesized via liquid precipitation method using MgBr2·6 H2 O and Al(NO)3·6 H2 O as raw materials and Na2 CO3-NaHCO3 buffer solution as precipitant.The influence of buffer solution concentration on the characteristics of the samples were investigated.The as-grown whiskers were characterized by X-ray diffraction,scan electron microscopy and elemental analysis.The results show that the buffer solution concentration in the system had a greater impact on whisker defined shape and crystal cell parameter LDH-Br whisker with well-defined shape,distinct intercalated structure,regular quality,and well-dispersing capability could be obtained under the following conditions:buffer solution volume ratio of 40%,reaction temperature of 75°C,and reaction time of 212 h.The whisker obtained was well-crystallized and had the morphology of homogeneous and fiber bar.
作者
吴健松
魏文君
蓝晓欣
WU Jiansong;WEI Wenjun;LAN Xiaoxin(School of Chemistry and Chemical Engineering,Lingnan Normal University,Zhanjiang Guangdong 524048,China;School of Biological Science and Technology,Lingnan Normal University,Zhanjiang Guangdong 524048,China)
出处
《新疆大学学报（自然科学版）》
CAS
2019年第1期44-48,共5页
Journal of Xinjiang University(Natural Science Edition)
基金
国家自然科学基金(51272207)
广东省科技计划(2013B021100019)
岭南师范学院博士专项
