Spatially separated bimetallic cocatalysts on hollow-structured TiO2 for photocatalytic hydrogen generation

被引:21
|
作者
She, Ping [1 ]
Qin, Jun-sheng [1 ,2 ]
Rao, Heng [1 ,2 ]
Guan, Buyuan [1 ,2 ]
Yu, Jihong [1 ,2 ]
机构
[1] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, 2699 Qianjin St, Changchun 130012, South Korea
[2] Jilin Univ, Int Ctr Future Sci, 2699 Qianjin St, Changchun 130012, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
CHARGE-SEPARATION; H-2; PRODUCTION; DRIVEN; SPHERES; ENHANCEMENT; EVOLUTION; NANOCOMPOSITE; NANOPARTICLES; MICROSPHERES; PERFORMANCE;
D O I
10.1039/d0qm00042f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Efficient charge separation and light harvesting of photocatalysts (e.g., TiO2) are the key issues to be considered in the design of solar-energy conversion systems. In particular, the charge separation of noble metal-decorated TiO2 materials could be greatly improved via decreasing the size of noble metal particles (NPs). Furthermore, designing specific morphologies such as hollow structures can improve light harvesting ability. Herein, a hybrid hollow TiO2 with spatially separated bimetals (Pd@TiO2@Au) was prepared, which demonstrated enhanced charge separation. By choosing zeolite as the sacrificial substrate, ultrasmall Pd NPs and Au NPs were decorated in the inner and outer shells of hollow TiO2, respectively. The separated bimetals could pull the photoexcited electrons away from the surface of TiO2 for more efficient charge separation. The as-prepared Pd@TiO2@Au catalyst exhibited a superior photocatalytic H-2 evolution rate up to 272.3 mu mol h(-1), which was higher than most of the TiO2-based photocatalysts.
引用
收藏
页码:1671 / 1678
页数:8
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