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Rh,Sb-codoped SrTiO3 cubic nanoparticles encapsulated by ZnIn2S4 nanosheets for efficient visible-light-driven
Junzhe Jiang1,2, Yiquan Zhan1,2, Bingxue Li1
1Jiangxi Province Key Laboratory of Functional Crystalline Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, China. lys90s@126.com.
This study developed a Rh,Sb-codoped Strontium titanate (SrTiO3) and Zinc Indium Sulfide (ZnIn2S4) heterojunction photocatalyst. This novel material significantly enhances visible-light-driven hydrogen production by improving charge carrier separation.
Area of Science:
- Materials Science
- Photocatalysis
- Renewable Energy
Background:
- Strontium titanate (SrTiO3) is limited to UV light absorption for solar hydrogen production.
- Indium zinc sulfide (ZnIn2S4) absorbs visible light but suffers from charge carrier recombination.
Purpose of the Study:
- To synthesize a Rh,Sb-codoped SrTiO3@ZnIn2S4 heterojunction photocatalyst.
- To enhance visible-light-driven hydrogen evolution activity through improved charge carrier separation.
Main Methods:
- Synthesis of Rh,Sb-codoped SrTiO3 nanoparticles encapsulated with ZnIn2S4 nanosheets.
- Band structure modification of SrTiO3 using Rh and Sb doping.
- Characterization using UV-Vis, XPS, and electrochemical analyses to confirm interfacial electric field formation.
Main Results:
- The Rh,Sb-SrTiO3@ZnIn2S4 heterojunction effectively promoted charge carrier separation.
- An interfacial electric field formed due to work function differences facilitated carrier migration.
- The optimal photocatalyst achieved a hydrogen evolution rate of 107.63 μmol h-1, 4.6 times higher than pristine ZnIn2S4.
Conclusions:
- The Rh,Sb-codoped SrTiO3@ZnIn2S4 heterojunction is a promising material for efficient visible-light-driven hydrogen production.
- Band structure engineering and heterojunction construction are effective strategies to overcome limitations of individual photocatalysts.
- The interfacial electric field plays a crucial role in enhancing photocatalytic activity.
