Dual-functional photocatalysts help to maximize resource utilization in water remediation, but often they are visiblelight- inactive, toxic, and cost-intensive. Herein, a type-II heterojunction visible-light-active photocatalyst is reported for tandem degradation of Rhodamine B and generation of H2. A Rhodamine B degradation rate of 2.3 × 10−2 min−1 and H2 production activity of 5789 μmol h−1 g−1 are shown. The hybrid shows a gradient core− shell morphology with a visible - light-absorbing phenyl-modified carbon nitride (PhCN) core and a porous PhCN/TiO2 outer shell, resulting in an enhanced interaction between the catalyst and the surroundings. The nanoscale crystallization of TiO2 on PhCN’s surface, shifts the triazine network structure, while autoclave treatments further increase the band gap and suppress charge carrier recombination. The influence of nanoscale morphological changes on photocatalytic activity was examined by varying the component ratios and thermal treatments, highlighting the strong correlation between the nanoscale architecture and the enhanced catalytic activity. This work provides a detailed guide to the exploration of environmentally friendly dual-functional photocatalysts.
Elucidation of a Core–Shell Structure in Phenyl-Grafted Carbon Nitride/TiO2 Nanohybrids for Visible-Light-Mediated H2 Production with Simultaneous Rhodamine B Degradation
Hazra, MoulikaPrimo
;Porcu, StefaniaSecondo
;Ricci, Pier Carlo
Ultimo
2025-01-01
Abstract
Dual-functional photocatalysts help to maximize resource utilization in water remediation, but often they are visiblelight- inactive, toxic, and cost-intensive. Herein, a type-II heterojunction visible-light-active photocatalyst is reported for tandem degradation of Rhodamine B and generation of H2. A Rhodamine B degradation rate of 2.3 × 10−2 min−1 and H2 production activity of 5789 μmol h−1 g−1 are shown. The hybrid shows a gradient core− shell morphology with a visible - light-absorbing phenyl-modified carbon nitride (PhCN) core and a porous PhCN/TiO2 outer shell, resulting in an enhanced interaction between the catalyst and the surroundings. The nanoscale crystallization of TiO2 on PhCN’s surface, shifts the triazine network structure, while autoclave treatments further increase the band gap and suppress charge carrier recombination. The influence of nanoscale morphological changes on photocatalytic activity was examined by varying the component ratios and thermal treatments, highlighting the strong correlation between the nanoscale architecture and the enhanced catalytic activity. This work provides a detailed guide to the exploration of environmentally friendly dual-functional photocatalysts.File | Dimensione | Formato | |
---|---|---|---|
paper Hazra et al.pdf
accesso aperto
Tipologia:
versione post-print (AAM)
Dimensione
4.34 MB
Formato
Adobe PDF
|
4.34 MB | Adobe PDF | Visualizza/Apri |
hazra-et-al-2025-elucidation-of-a-core-shell-structure-in-phenyl-grafted-carbon-nitride-tio2-nanohybrids-for-visible (1)_compressed.pdf
accesso aperto
Tipologia:
versione editoriale (VoR)
Dimensione
1.83 MB
Formato
Adobe PDF
|
1.83 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.