| This study is to explore and develop the bismuth oxychloride-based photocatalysts.Multiply strategies for performance enhancing was performed,including microstructure,bulk structure and interface structure designs.Meanwhile,the relationship between the active layers and photocatalysis was also established.?1?To improve the photocatalytic properties of BiOCl and other homologous materials in actual application,BiOCl formed nanosheet-array structure on the surface of polyurethane foam by a facile dipping-hydrolysis method.It was found that the performance of the composite photocatalysts was better than the primary powder in hydrogen evolution and organic photodegradation,such as methyl orange,phenol and chlortetracycline.The composite photocatalyst is easily-recycled,density-controllable,and shows a good application prospect.?2?To develop bismuth oxychloride-based photocatalysts,the low-temperature phase CdBiO2Cl?LT-CdBiO2Cl?was prepared by a hydrothermal method.Meanwhile,LT-CdBiO2Cl/BiOCl heterojunction composite was also synthesized by the same method.It was observed that heterojunction of two materials with similar structure facilitates the separation of photogenerated charges.Thus,the performance of composite in CO2 photoreduction is higher than that of BiOCl and LT-CdBiO2Cl.?3?For the purpose of exploring the active layer in the Sillén-like structure,a comparative study of CaBiO2Cl,SrBiO2Cl,and BaBiO2Cl was conducted.Results of structure discussion and theoretical simulation proved that the anisotropy of[CaBiO2]+and the narrow interlayer spacing promote charge separation and photocatalytic performance.?4?To develop Sillén–Aurivillius structural materials,Bi4Mn0.33W0.67O8Cl was prepared by the solid-phase method and the molten-salt method.It was found that the Bi4Mn0.33W0.67O8Cl is able to achieve water splitting and photodegradation.The performance of Bi4Mn0.33W0.67O8Cl in these reactions can be promoted with optimal conditions. |
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