【摘要】 以β-Bi2O3为原料,采用无模板剂水热法制备了Bi₁₂O₁₇Cl₂纳米带,利用X射线衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）和高分辨透射电镜（HRTEM）对其形貌和结构进行了表征并作为阻燃剂添加到聚氯乙烯（PVC）中评价其阻燃性能。结果表明,适宜的Bi/Cl物质的量比对水热合成Bi₁₂O₁₇Cl₂纳米带及其化学计量比影响显著,当Bi/Cl物质的量比为1∶2.5时,可得到分散性好、形貌均匀的Bi₁₂O₁₇Cl₂纳米带;改变Bi/Cl物质的量比,纳米带中Bi/Cl化学计量比从6∶1变成2.4∶1。初步探讨了Bi₁₂O₁₇Cl₂纳米带可能的生长机理,在水热反应过程中,Bi 3+与Cl-发生络合反应形成BiCln3-n络合物,从而合成Bi₁₂O₁₇Cl₂纳米带。更多还原

【Abstract】 Bi₁₂O₁₇Cl₂ nanobelts were synthesized via a facile template-free hydrothermal approach using commercialβ-Bi2O3 as raw materials in aqueous solution.The morphology and structure of as-prepared samples were investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）and high-resolution transmission electron microscopy（HRTEM）.In order to evaluate the flame retardant performance,Bi₁₂O₁₇Cl₂ nanobelts was added to the polyvinyl chloride（PVC）as fire retardant.The results showed that the suitable molar ratio of Bi∶Cl played a key role in controlling the composition,stoichiometric ratio of compounds,and anisotropic growth of Bi₁₂O₁₇Cl₂ nanobelts.When the molar ratio of Bi∶Cl was 1∶2.5,the obtained Bi₁₂O₁₇Cl₂ nanobelts had a good dispersion.By changing the molar ratio of Bi∶Cl in the reaction system,the as-synthesized nanobelts′Bi∶Cl stoichiometric ratio would vary from 6∶1to 2.4∶1.The growth mechanism of the Bi12-O17Cl2 nanobelts was investigated by studying the influence of molar ratio of Bi∶Cl on the structure and morphology of the products,whose results indicated that the crystal-induced growth of Bi₁₂O₁₇Cl₂ was carried out through BiCln3-n complexes.更多还原