十字花状纳米Bi_2S_3的制备及其电化学性质研究  

Study on the synthesis and electrochemical performance of cruciate flower like Bi_2S_3 nanopartical

作　　者：胡海霞[1] 吕丽云[1] 王虹[1] 

机构地区：[1]天津大学化工学院,天津化学化工协同创新中心,绿色合成与转化教育部重点实验室,天津300072

出　　处：《化工新型材料》2016年第5期53-55,59,共4页New Chemical Materials

基　　金：国家自然科学基金(50673075)

摘　　要：采用水热合成法,以柠檬酸铋和L-半胱氨酸为原料,以聚乙烯吡咯烷酮为保护剂,控制Bi和S元素的摩尔比为1∶2,保护剂含量在1.05%～2.10%（质量分数）范围内,于150℃下反应8h,制得一种形貌新颖的十字花状纳米Bi_2S_3。扫描电镜及X射线衍射分析显示,所得产物由厚度为20nm的薄层带状物构成,属正交晶系。样品的循环伏安曲线研究表明,随着电极极化过程的进行,该形貌特征的纳米Bi_2S_3颗粒存在对氢的强烈化学吸/脱附作用,具有将其作为电化学储氢材料进一步开发的潜在价值。In a typical hydrothermal method,cruciate flower like Bi_2S_3 nanoparticles have been successfully synthesized by using bismuth citrate and L-cysteine as reactants,polyvinylpyrrolidone（PVP）as capping agent.The optimized experimental parameters were set as follow：the ratio of Bi and S was 1∶2,content of PVP was between 1.05%～2.10wt%,reaction temperature and time were chosen as 150℃and 8h,respectively.X-Ray powder diffraction（XRD）revealed that the obtained sample can be attributed to the pure orthorhombic phase.And scanning electron microscopy（SEM）showed that the nanoscaled species were usually fabricated by several thin nanobelts.In the cyclic voltammetry（CV）measurement to the Bi_2S_3,an hydrogen adsorption-desorption process was found to be happened on the surfaces of nanoparticles,suggesting that the particles might stand an chance to be used in the field of electrochemical hydrogen storage materials studies.

关 键 词：BI2S3 水热法 十字花状 电化学储氢 

分 类 号：TQ135.32[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]