MOF基光催化剂的制备及其光催化产氢性能研究

Preparation of MOF-based Photocatalyst and Its Photocatalytic Performance for Hydrogen Production

通过在球形中空结构Ni-MOF的表面原位生长CdS纳米颗粒制备了CdS/Ni-MOF可见光驱动的非贵金属光催化剂。相对纯CdS纳米颗粒,CdS/Ni-MOF的产氢性能有明显提升,CdS/Ni-MOF(60)复合光催化剂的产氢率达到了211.5μmol·h^(-1),是纯CdS产氢率的6倍,且其具有良好的光催化稳定性。CdS和Ni-MOF的相匹配的能带位置实现了光生电子的有效分离,加速电子转移,减少了CdS中光生电子与空穴的复合几率,从而有效阻碍了CdS的光腐蚀现象。

The visible-driven non-noble metal CdS/Ni-MOF photocatalysts were prepared by in-situ growth of CdS nanoparticles on the surface of spherical hollow structure Ni-MOF.Compared with pure CdS nanoparticles,the hydrogen production performance of CdS/Ni-MOF composite photocatalyst was significantly improved,and the hydrogen production rate of CdS/Ni-MOF(60)composite photocatalyst reached 211.5μmol·h^(-1),which was 6 times of that of pure CdS.And CdS/Ni-MOF(60)composite photocatalyst showed the good stability and recycling.Due to the band position matching between CdS and Ni-MOF,the effective separation of photogenerated electrons wad realized,which accelerated electron transfer and reduced the recombination probability of photogenerated electrons and holed in CdS,thus effectively hindered the photocorrosion phenomenon of CdS.