| Autor: |
Ahmad I; Department of Physics, University of Agriculture Faisalabad, Pakistan. irshadmahar55@yahoo.com., AlFaify SA; Department of Physics, College of Science, King Khalid University, Abha 61413, Saudi Arabia., Alanezi KM; Chemical Engineering Technology Department, College of Technological Studies, Public Authority of Applied Education and Training, Kuwait., Alfaifi MQ; Refining Technologies and Petrochemicals Institute, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia., Abduljawad MM; Refining Technologies and Petrochemicals Institute, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia., Liu Y; Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, China. liuyuyu@shu.edu.cn. |
| Abstrakt: |
Addressing the intricate challenge of simultaneously improving the separation of photoinduced electron-hole pairs and enhancing redox potentials to produce hydrogen fuel demands the rational design of S-scheme heterojunction photocatalysts. Herein, we used a hydrothermal process to integrate Nb 2 O 5 nanorods and La 2 O 3 nanosheets to design an Nb 2 O 5 /La 2 O 3 S-scheme system for photocatalytic hydrogen production under simulated sunlight illumination. Notably, the optimal hydrogen production performance of Nb 2 O 5 /La 2 O 3 (the molar ratio of Nb 2 O 5 to La 2 O 3 is 0.4% and denoted as 0.4NbO-LaO) reached 2175 μmol h -1 g -1 , which is 14.5 and 15.9 times superior in comparison with those of pure Nb 2 O 5 and La 2 O 3 , respectively. In addition, repeated experiments verify the strong stability of the 0.4NbO-LaO photocatalyst. The S-scheme mechanism, verified by the in situ XPS method, plays a crucial role in producing hydrogen with a significantly higher yield than pure Nb 2 O 5 and La 2 O 3 . This design approach offers an innovative avenue to widen the scope of S-scheme photocatalysts for solar fuel production. |
