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为了开发具有可见光响应的高活性光解水制氢催化剂,采用水热合成法制备了CdxMn1–xS固溶体光催化剂,通过X射线衍射、紫外–可见吸收光谱测试手段对所制备催化剂进行了表征。结果表明:CdxMn1–xS固溶体具有和CdS相似的结构,即六方相纤维锌矿结构,并且CdxMn1–xS固溶体在可见光下有很强的吸收,Cd0.34Mn0.66S,Cd0.48Mn0.52S及Cd0.68Mn0.32S的禁带宽度分别为2.17、2.25和2.32 eV。光催化分解水制氢实验表明:催化剂制氢活性由大到小的顺序排列为:Cd0.48Mn0.52S,Cd0.34Mn0.66S,Cd0.68Mn0.32S,CdS,MnS。Cd0.48Mn0.52S产氢速率可达273.3μmol/h。
Abstract：In order to improve the photocatalytic activity of the photocatalyst as well as the response to the visible region of the solar spectrum,CdxMn1–xS solid solution photocatalysts were prepared by the hydrothermal synthesis method.The prepared photocatalysts were characterized by XRD and UV–Vis testing techniques.The results show that the crystal structure of prepared products is wurtz-ite hexagonal CdxMn1–xS and the spectral response of the photocatalysts is extended to the visible region.The energy gap of Cd0.34Mn0.66S,Cd0.48Mn0.52S and Cd0.68Mn0.32S is 2.17,2.25 and 2.32 eV respectively.The results of producing H2 by photocatalytic splitting water show that the activity of photocatalyst for hydrogen production is noted in the sequence of high to low of Cd0.48Mn0.52S,Cd0.34Mn0.66S,Cd0.68Mn0.32S,CdS,MnS,the highest hydrogen production rate of the prepared photocatalyst,Cd0.48Mn0.52S,is 273.3 μmol/h.
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基本信息:
中图分类号:O643.36;TQ116.2
引用信息:
[1]孙晓君,刘婧婧,魏金枝,等.固溶体Cd_xMn_(1-x)S光催化剂的制备及光解水制氢[J].硅酸盐学报,2013,41(07):1026-1030.
基金信息:
黑龙江省基金项目(B200806)
2013-06-28
2013-06-28
2013-06-28