Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2018-01-05 , DOI: 10.1016/j.apcatb.2018.01.009 Donglin Zhong , Wenwen Liu , Pengfei Tan , Anquan Zhu , Yi Liu , Xiang Xiong , Jun Pan
A novel kind of nanocomposites consisted of CdSe quantum dots (QDs) sensitized BaTiO3 nanocudes was successfully synthesized by facile hydrothermal and chemical bath methods to investigate the synergy effect of isotropic {001} facets and anisotropic ({230} and {001}) facets on photocatalytic water reduction. The CdSe QDs were randomly decorated on the isotropic facets or anisotropic facets of BaTiO3. The optimal CdSe QDs sensitization content was 7.5% (molar ratio), namely the 7.5% CdSe QDs sensitized BaTiO3 composite showed significantly enhanced photocurrent response and photocatalytic performance. The superior photocatalytic activities of CdSe/BaTiO3 composites were owing to the synergy effect of {001} and {230} facets including the charge separation and electronic reduction activities. The work suggested that crystal facet engineering had more promising application in the heterogeneous catalyst system.
中文翻译:
CdSe量子点敏化的BaTiO 3纳米立方各向异性{001}和{230}刻面对光催化减水的协同效应
通过简便的水热和化学浴方法成功地合成了由CdSe量子点(QDs)敏化的BaTiO 3纳米晶组成的新型纳米复合材料,以研究各向同性{001}面与各向异性({230}和{001})面的协同效应对光催化减水。将CdSe量子点随机装饰在BaTiO 3的各向同性面或各向异性面上。最佳的CdSe QDs敏化含量为7.5%(摩尔比),即7.5%的CdSe QDs敏化的BaTiO 3复合材料表现出显着增强的光电流响应和光催化性能。CdSe / BaTiO 3的优异光催化活性由于{001}和{230}面的协同作用,包括电荷分离和电子还原活性,使得复合材料成为可能。这项工作表明,晶体刻面工程在非均相催化剂体系中具有更广阔的应用前景。