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Ag/HNb3O8纳米片的合成及其光催化性能
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Abstract:
以商业NbCl5为铌源，通过水热法合成HNb3O8纳米片，然后分别采用光沉积和浸渍的方法制备了Ag/HNb3O8-pp (光沉积)和Ag/HNb3O8 (浸渍方法)光催化剂，对合成的两种催化剂进行了详细的表征，并研究其光催化析氢活性。XRD、FT-IR、SEM和TEM的表征结果说明我们成功合成了负载Ag的HNb3O8纳米片催化剂。UV-vis-NIR分析了各催化剂的能带结构。结果表明：由于Ag的引入，Ag/HNb3O8催化剂表现出了较强的LSPR效应，对可见光和近红外光的吸收得到了增强。光催化测试的结果与表征结果一致，浸渍方法制备的Ag/HNb3O8表现出了较强的析氢速率(889.7 μmol？g？1？h？1)，是纯HNb3O8的31.3倍(28.4 μmol？g？1？h？1)。
HNb3O8 nanosheets composites were synthesized by a one-step hydrothermal method using commercial NbCl5 as niobium source. Ag/HNb3O8-PP and Ag/HNb3O8 photocatalysts were prepared by means of photo-deposition and dipping with a certain proportion of Ag on HNb3O8 nanosheets. Besides, the results of XRD, FT-IR, SEM and TEM show that the Ag loaded HNb3O8 nanosheets were successfully synthesized. The band structures of photocatalyst were determined by UV-vis-NIR. Because of loading Ag atom, the more absorption might be associated with LSPR. The photocatalytic tests are consistent with the characterization. The optimal Ag/HNb3O8 displays the highest hydrogen evolution rate (889.7 μmol？g？1？h？1), which is 31.3 times of that for pure HNb3O8 (28.4 μmol？g？1？h？1).
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