| 溶液pH值对PbWO4晶相和形貌的影响 |
| |
| 引用本文： | 杨晓隆,黄建花.溶液pH值对PbWO4晶相和形貌的影响[J].浙江理工大学学报,2012(5):734-739. |
| |
| 作者姓名： | 杨晓隆 黄建花 |
| |
| 作者单位： | 浙江理工大学化学系 |
| |
| 基金项目： | 浙江理工大学研究生创新基金项目(YCX-S1101) |
| |
| 摘 要： | 在30℃下,以Na2WO4和Pb(NO3)2为原料,通过沉淀反应制备PbWO4晶体。考察Pb(NO3)2溶液的pH值对PbWO4的晶型和形貌的影响。通过XRD、Raman和SEM等表征,发现在酸性和碱性溶液中分别得到了梭状和八面体状的四方晶相PbWO4晶体,而在中性溶液中,得到单斜晶相PbWO4纳米带,表明pH值显著影响Pb-WO4的晶型和形貌。室温下,以300nm为激发波长研究产物的固体荧光光谱,发现碱性条件下得到的四方相Pb-WO4八面体具有最强的绿发光带,表明PbWO4的荧光性质受其晶型和形貌影响。
|
| 关 键 词： | 钨酸铅 pH 晶体生长 荧光 |
Control of PbWO4 Crystal Phase and Morphology under Varying pH Conditions |
| |
| YANG Xiao-long,HUANG Jian-hua.Control of PbWO4 Crystal Phase and Morphology under Varying pH Conditions[J].Journal of Zhejiang Sci-tech University,2012(5):734-739. |
| |
| Authors: | YANG Xiao-long HUANG Jian-hua |
| |
| Affiliation: | (Department of Chemistry,Zhejiang Sci-Tech University,Hangzhou 310018,China) |
| |
| Abstract: | PbWO4 crystals are synthesized at 30℃ by the precipitation reaction of Na2WO4 and Pb(NO3)2 in an aqueous solution.The effect of the pH value of Pb(NO3)2 solution on the polymorphism and morphology of PbWO4 is investigated by X-ray diffraction,Raman spectroscopy,and scanning electron microscopy.Shuttle-like and octahedron-like PbWO4 particles of tetragonal stolzite structures are obtained in acidic and basic solutions,respectively.Monoclinic raspite PbWO4 nanobelts are prepared at pH 7.0.These results indicate the strong influence of pH on the polymorphism and morphology of PbWO4.The photoluminescence properties of PbWO4 are also studied.Stolzite octahedron-like PbWO4 is found to possess excellent photoluminescence. |
| |
| Keywords: | PbWO4 pH crystal growth photoluminescence |
| 本文献已被 CNKI 等数据库收录！ |
|
