以Zn(NO3)2·6H2O和Na2WO4·2H2O为原料,草酸为沉淀剂,采用水热法在180℃反应4h制备了ZnWO4粉体,并考察了前驱体溶液pH值对ZnWO4发光性能的影响.通过X射线衍射(XRD),场发射扫描电子显微镜(SEM)和荧光光谱(PL)等测试手段对样品的物相、微观形貌和发光性能进行表征.结果表明:pH值为7～9时适宜合成ZnWO4粉体,pH =7、8时,得到的是星状结构ZnWO4粉体;pH =9时分别得到的是由长度为500 nm,直径为100 nm的纳米棒交叉组装而成的镂空结构ZnWO4粉体.相比之下,由纳米棒交叉组装而成的镂空片的发光性能最佳.
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