Controlled synthesis of barium chromate microcrystals
Controlled synthesis of barium chromate microcrystals
复制标题
铬酸钡微晶的控制合成
DOI：
10.1002/crat.201400267
复制
发表时间：
2014
影响因子：
1.5
通讯作者：
Tang W. H.
中科院分区：
文献类型：
--
作者：
Xiao H.;Ding S. S.;Xu X.;Pan N.;Fan D. Y.;Yang H. J.;Lei M.;Du Y. X.;Zhang R.;Wang Y. G.;Tang W. H.
以聚对苯乙烯磺酸钠（PSS）为模板剂，在室温条件下从水溶液中合成了梭形、X形、椭圆形、叶状等不同形貌的铬酸钡（BaCrO 4）微晶。表征结果表明，pH值、反应物浓度和PSS浓度是影响BaCrO 4形貌和尺寸演变的重要参数。提出了不同形貌BaCrO 4晶体的可能形成机理。PSS首先与Ba ~（2+）络合，然后通过与晶体平面的相互作用影响成核和晶化过程，最终形成各种形貌和尺寸的晶体。此外，还提出了光致发光（PL）谱的可能机制。
Barium chromate (BaCrO4) microcrystals with various morphologies such as shuttle‐like, x‐shaped, ellipsoid, leaf‐like crystals were synthesized from aqueous solutions using poly (sodium 4‐styrenesulfonate) (PSS) as template agent at room temperature. The characterization results show that pH values and concentrations of reactants and PSS are important parameters in the morphology and size evolution of BaCrO4. The possible formation mechanism of BaCrO4crystals with different morphologies was proposed. PSS complexes Ba2+first, then affects the nucleation and crystallization process by interacting with the plane face of crystal, which finally results in various morphologies and sizes of crystals. In addition, the possible mechanism of photoluminescence (PL) spectra was also proposed.