以硝酸铋为铋源、硫脲为硫源,分别以小分子有机物-巯基乙酸、柠檬酸及聚合物半导体-羧基化PPV(羧基化的聚对苯乙炔)为模板,利用水热反应法制备了不同形貌的Bi2S3微晶,并对产物用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见-近红外光谱(UV-Vis-Near-IR)等进行表征.结果表明,所制备的Bi2S3微晶为斜方晶系的辉铋矿;在巯基乙酸的作用下,Bi2S3排列成直径约为2～3 μm的花状微晶;在柠檬酸的作用下,Bi2S3晶体呈絮状,结成直径约为2μm左右的绒球;在羧基化PPV的作用下,Bi2S3构成直径约为2μm的绒球.通过由UV-Vis-Near-IR光谱绘制的(αhv)2～hv曲线图计算得到,在不同有机物模板作用下得到的Bi2S3微晶的能带间隙均大于无模板作用得到的Bi2S3,且羧基化PPV的作用效果优于小分子有机物,使能带间隙提高为1.64 eV.
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