期刊
CHEMICAL ENGINEERING JOURNAL
卷 360, 期 -, 页码 221-230出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.11.211
关键词
Hollow core-shell; Hydrogen production; CdS@TiO2/Ni2P; Template
资金
- National Natural Science Foundation of China [61704114, 51662036]
- Graduate student scientific research innovation projects in Xinjiang autonomous region [XJGRI2017046]
- Open Foundation of Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bintuan [2016BTRC005]
During the photocatalytic production of hydrogen gas, close interface with a catalyst is very important. We designed a noble-metal-free photocatalytic system that is spatially separated to produce hydrogen by high frequency visible light. We used a new type of a catalyst consisting of hollow core-shell CdS@TiO2/Ni2P structures prepared using sacrificial template method. Photocatalytic decomposition of water was tested using this catalyst. Hydrogen production yield using 420 nm light was 14.80 mmol/g after 2.5 h and using Xe lamp with AM1.5G filter was 34.78 mmol/g after 2.5 h. Hollow core shell CdS@TiO2/Ni2P particles were more stable than hollow core shell CdS@TiO2/Pt structures because TiO2 protected CdS from photo-corrosion. Combination of CdS and Ni2P increased absorption range of TiO2 at 720 nm. Holes and electrons produced during the photo-reaction can migrate to the CdS on the inside and to the Ni2P on the outside of the TiO2 protective coating. Such design exposes more surface, thus, increases hydrogen production.
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