研究目的
To compare the performance of oxidized graphitic carbon nitride (o-g-C3N4) and commercial P25 TiO2 for photocatalytic hydrogen production from aqueous biomass-derived sacrificial agents under simulated solar light, using both noble (Pt) and non-noble (Cu–Ni) metal co-catalysts, and to evaluate their sustainability and efficiency in waste biomass applications.
研究成果
o-g-C3N4 is a competitive, low-cost alternative to P25 TiO2 for photocatalytic H2 production from biomass-derived sacrificial agents, even with non-noble metal co-catalysts. It shows potential for sustainable hydrogen evolution, though efficiency in waste streams requires enhancement. Future research should focus on improving photocatalytic systems for industrial wastewater applications.
研究不足
The study is limited to lab-scale experiments under controlled conditions. HERs were lower in wastewaters due to light scattering and absorbance from suspended particulate and other species. The efficiency of non-noble metal co-catalysts is lower than Pt, and further optimization is needed for real-world applications.
1：Experimental Design and Method Selection:
The study compared o-g-C3N4 and P25 TiO2 semiconductors for photocatalytic H2 evolution under simulated solar light, using Pt or Cu–Ni co-catalysts. Methods included photodeposition for co-catalyst immobilization and photocatalytic experiments in aqueous solutions of saccharides and wastewaters.
2：Sample Selection and Data Sources:
Samples included aqueous solutions of starch, glucose, galactose, lactose, maltose (4.5 g L?1), and wastewaters from a brewery and dairy factory. Wastewaters were centrifuged to remove suspended particulate.
3：5 g L?1), and wastewaters from a brewery and dairy factory. Wastewaters were centrifuged to remove suspended particulate.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included Pyrex glass containers, Solar Box 1500e solar simulator, GC-TCD for gas analysis, ICP-OES for metal quantification, and ultrasonic bath. Materials included H2PtCl6, DCD, HNO3, metal salts, saccharides, and catalysts (o-g-C3N4, P25 TiO2).
4：2).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Catalysts were prepared by photodeposition. Suspensions were sonicated, deoxygenated with Ar, and irradiated for 6 h with magnetic stirring. H2 was quantified by GC-TCD. Triplicate experiments were performed.
5：Data Analysis Methods:
Hydrogen evolution rates (HER) were calculated in μmol g?1 h?1. Data were analyzed for reproducibility (RSDs reported), and apparent quantum yields were calculated.
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