Boosting photocatalytic activity of Pd decorated TiO2 nanocrystal with exposed (001) facets for selective alcohol oxidations
Boosting photocatalytic activity of Pd decorated TiO2 nanocrystal with exposed (001) facets for selective alcohol oxidations
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提高具有暴露 (001) 面的 Pd 修饰的 TiO2 纳米晶体的光催化活性,用于选择性醇氧化
DOI:
10.1016/j.apcatb.2016.05.018
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发表时间:
2016-10
期刊:
影响因子:
--
通讯作者:
Yong Men
中科院分区:
文献类型:
--
作者:
Jinguo Wang;Pinhua Rao;Wei An;Jingli Xu;Yong Men
Pd decorated TiO2nanocrystal with exposed (001) facets was synthesizedviasolvothermal hydrolysis combining photoreduction deposition route, which exhibited a great enhancement in activity and stability of photocatalytic selective alcohol oxidations under UV light irradiation in aqueous medium. The superior activity of Pd decorated TiO2nanocrystal with exposed (001) facets was attributed to the synergistic promoting effects of the following factors: firstly, the exposed (001) facets with higher surface energy facilitated the activation of reactant molecules and the photocatalytic oxidation; secondly, the increased oxygen vacancies and enhanced O2adsorption on (001) facets could trap photoelectrons and thus, inhibit their recombination with holes; thirdly, the decoration with Pd nanoparticles effectively reduce the photocharge recombination rate by capturing photoelectrons. Meanwhile, this photocatalyst displayed excellent durability owning to the strong Pd-TiO2interaction against deactivation caused by either Pd leaching or Pd aggregation.
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