Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light
Abstract Ag-La-CaTiO3 was used in place of sacrificial agents to assess the influence of operational factors on hydrogen generation in a photocatalytic water splitting system. After being synthesized, the physicochemical features of this substance were accurately described. Several characterization...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-01-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-51219-z |
| _version_ | 1827382190451720192 |
|---|---|
| author | Safaa Ragab Marwa R. Elkatory Mohamed A. Hassaan Ahmed El Nemr |
| author_facet | Safaa Ragab Marwa R. Elkatory Mohamed A. Hassaan Ahmed El Nemr |
| author_sort | Safaa Ragab |
| collection | DOAJ |
| description | Abstract Ag-La-CaTiO3 was used in place of sacrificial agents to assess the influence of operational factors on hydrogen generation in a photocatalytic water splitting system. After being synthesized, the physicochemical features of this substance were accurately described. Several characterization techniques including UV–Vis spectroscopy, FTIR, XRD, XPS, EDX, SEM, TGA, DRS and BET were applied to study the prepared Ag-La-CaTiO3 photocatalyst. Ag-La-CaTiO3 shows a band in the visible wavelength between 400 and 800 nm at < 560 nm compared to the main CaTiO3 band at 350 nm. Ag 4d5s electrons transition to the conduction band (CB), which is responsible for the absorption band at ~ 560 nm (> 2.21 eV). The effects of catalyst concentration, light intensity, and beginning solution pH on the H2 generation rate may all be evaluated simultaneously using experimental design procedures. Up to a maximum threshold, where a drop in the rate of gas evolution occurs, it was confirmed that the increase in catalyst dose positively affects system productivity. The initial solution pH plays a crucial role in H2 production, and pH = 4 and 10 are the optimum pH with a higher yield of H2 production. The highest total H2 production rate, 6246.09 μmol, was obtained using a catalyst concentration of 700 mg and solution pH equal to 10 under 1200 W Vis lamp for 3 h. For prediction and optimization, a D-Optimal design was applied and the optimal results were pH 4, the catalyst dose of 645.578 mg and 1200 W with H2 production of 6031.11 μmol. |
| first_indexed | 2024-03-08T14:15:59Z |
| format | Article |
| id | doaj.art-45290499dd8a44268a204be13362ee52 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-08T14:15:59Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-45290499dd8a44268a204be13362ee522024-01-14T12:21:56ZengNature PortfolioScientific Reports2045-23222024-01-0114111910.1038/s41598-024-51219-zExperimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible lightSafaa Ragab0Marwa R. Elkatory1Mohamed A. Hassaan2Ahmed El Nemr3National Institute of Oceanography and Fisheries (NIOF)Advanced Technology and New Materials Research Institute, SRTA-CityNational Institute of Oceanography and Fisheries (NIOF)National Institute of Oceanography and Fisheries (NIOF)Abstract Ag-La-CaTiO3 was used in place of sacrificial agents to assess the influence of operational factors on hydrogen generation in a photocatalytic water splitting system. After being synthesized, the physicochemical features of this substance were accurately described. Several characterization techniques including UV–Vis spectroscopy, FTIR, XRD, XPS, EDX, SEM, TGA, DRS and BET were applied to study the prepared Ag-La-CaTiO3 photocatalyst. Ag-La-CaTiO3 shows a band in the visible wavelength between 400 and 800 nm at < 560 nm compared to the main CaTiO3 band at 350 nm. Ag 4d5s electrons transition to the conduction band (CB), which is responsible for the absorption band at ~ 560 nm (> 2.21 eV). The effects of catalyst concentration, light intensity, and beginning solution pH on the H2 generation rate may all be evaluated simultaneously using experimental design procedures. Up to a maximum threshold, where a drop in the rate of gas evolution occurs, it was confirmed that the increase in catalyst dose positively affects system productivity. The initial solution pH plays a crucial role in H2 production, and pH = 4 and 10 are the optimum pH with a higher yield of H2 production. The highest total H2 production rate, 6246.09 μmol, was obtained using a catalyst concentration of 700 mg and solution pH equal to 10 under 1200 W Vis lamp for 3 h. For prediction and optimization, a D-Optimal design was applied and the optimal results were pH 4, the catalyst dose of 645.578 mg and 1200 W with H2 production of 6031.11 μmol.https://doi.org/10.1038/s41598-024-51219-z |
| spellingShingle | Safaa Ragab Marwa R. Elkatory Mohamed A. Hassaan Ahmed El Nemr Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light Scientific Reports |
| title | Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light |
| title_full | Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light |
| title_fullStr | Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light |
| title_full_unstemmed | Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light |
| title_short | Experimental, predictive and RSM studies of H2 production using Ag-La-CaTiO3 for water-splitting under visible light |
| title_sort | experimental predictive and rsm studies of h2 production using ag la catio3 for water splitting under visible light |
| url | https://doi.org/10.1038/s41598-024-51219-z |
| work_keys_str_mv | AT safaaragab experimentalpredictiveandrsmstudiesofh2productionusingaglacatio3forwatersplittingundervisiblelight AT marwarelkatory experimentalpredictiveandrsmstudiesofh2productionusingaglacatio3forwatersplittingundervisiblelight AT mohamedahassaan experimentalpredictiveandrsmstudiesofh2productionusingaglacatio3forwatersplittingundervisiblelight AT ahmedelnemr experimentalpredictiveandrsmstudiesofh2productionusingaglacatio3forwatersplittingundervisiblelight |