Comparative investigation on Visible Light-Driven Photocatalytic HER Activity Over Dye-sensitized ZnO/MoSX Catalysts

Öz

Sustainable hydrogen production from water holds significant promise for both addressing the energy crisis and mitigating climate change. Herein, a photocatalytic hydrogen production system was suggested, comprising of Eosin-Y (EY), Erythrosine-B (EB) as photo-sensitizer, ZnO photocatalyst, MoSx co-catalyst, and triethanolamine as a sacrificial agent. The characteristics properties and the photocatalytic hydrogen activities of the proposed catalysts were evaluated. Notably, the Eosin-Y sensitized ZnO/MoSx was exhibited the highest hydrogen activity, achieving as 5.27 mmol g-1 h-1 under visible light illumination. To investigate the dye effect, the comparative studies were also performed by using Eosin-Y and Erytrosine-B, and approximately 3.08 mmol g-1 h-1 hydrogen was achieved by using EB/ZnO/MoSx under the same conditions. In addition, the photocatalytic hydrogen mechanism of EY-sensitized ZnO/MoSx was also proposed and discussed. It is believed that this study can be a potential candidate for photocatalytic systems, providing innovative insights to explore the design of ZnO-based photocatalysts.

Anahtar Kelimeler

• Hydrogen production
• Dye-sensitization
• Zinc oxide
• Molybdenum sulfide
• Photocatalysis

Boya Duyarlı ZnO/MoSX Katalizörleri Üzerinde Görünür Işık Karşısında Fotokatalitik HER Aktivitesinin Karşılaştırmalı Araştırması

Öz

Sürdürülebilir sudan hidrojen üretimi, hem enerji krizine çözüm bulmak, hem de iklim değişikliğiyle mücadele etme bakımından büyük bir potansiyel taşımaktadır. Bu çalışmada, Eosin-Y (EY), Erytrosin B (EB) fotohassaslaştırıcısı, ZnO fotokatalizörü, MoSx yardımcı katalizörü ve trietanolamin (TEOA) elektron vericisinden oluşan bir fotokatalitik hidrojen üretim sistemi önerilmiştir. Önerilen katalizörlerin karakteristik özellikleri ve fotokatalitik hidrojen üretim aktiviteleri değerlendirilmiştir. Özellikle, Eosin-Y ile hassaslaştırılmış ZnO/MoSx, görünür ışık aydınlatması altında 5.27 mmol g⁻¹ s⁻¹ düzeyinde en yüksek hidrojen üretim aktivitesini göstermiştir. Boyar madde etkisini araştırmak amacıyla, Eosin-Y ve Erytrosin-B kullanılarak karşılaştırmalı hidrojen çalışmaları da yapılmış ve aynı koşullar altında EB/ZnO/MoSx ile yaklaşık 3.08 mmol g⁻¹ s⁻¹ hidrojen üretimi elde edilmiştir. Ayrıca EY ile hassaslaştırılmış ZnO/MoSx sisteminin hidrojen üretim mekanizması önerilmiş ve tartışılmıştır. Bu çalışmanın, ZnO bazlı fotokatalizörlerin tasarımına yönelik yenilikçi bakış açıları sağlayarak, potansiyel bir fotokatalitik sistem adayı olabileceği düşünülmektedir.

Anahtar Kelimeler

• Hidrojen üretimi
• Boya duyarlılığı
• Çinko oksit
• Molibden sülfür
• Fotokataliz

Kaynakça

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