Scopus
🔓 Açık Erişim YÖKSİS Eşleşti
Viologen-Based Covalent Organic Frameworks toward Metal-Free Highly Efficient Photocatalytic Hydrogen Evolution
ACS Applied Materials and Interfaces · Nisan 2023
YÖKSİS Kayıtları
Viologen-Based Covalent Organic Frameworks toward Metal-Free Highly Efficient Photocatalytic Hydrogen Evolution
ACS Applied Materials & Interfaces · 2023 SCI-Expanded
PROFESÖR İMREN HATAY PATIR →
Viologen-Based Covalent Organic Frameworks toward Metal-Free Highly Efficient Photocatalytic Hydrogen Evolution
ACS Applied Materials & Interfaces · 2023 SSCI
DOKTOR ÖĞRETİM ÜYESİ GİZEM YILDIZ →
Makale Bilgileri
DergiACS Applied Materials and Interfaces
Yayın TarihiNisan 2023
Cilt / Sayfa15 · 18836-18844
Scopus ID2-s2.0-85152208165
Erişim🔓 Açık Erişim
Özet
Covalent organic frameworks (COFs) have shown promise in the field of photocatalysts for hydrogen evolution. Many studies have been carried out using various electroactive and photoactive moieties such as triazine, imide, and porphyrin to produce COFs with different geometric structures and units. Electron transfer mediators like viologen and their derivatives can accelerate the transfer of electrons from photosensitizers to active sites. Herein, the combination of a biphenyl-bridged dicarbazole electroactive donor skeleton with a viologen acceptor structure is reported for the photocatalytic hydrogen evolution of novel COF structures with various alkyl linkers {TPCBP X-COF [X = ethyl (E), butyl (B), and hexyl (H)]}. The structures became more flexible and exhibited less crystal behavior as the length of the alkyl chain increased according to scanning and transmission electron microscopy images, X-ray diffraction analyses, and theoretical three-dimensional geometric optimization. In comparison, the H2 evolution rate of the TPCBP B-COF (12.276 mmol g-1) is 2.15 and 2.38 times higher than those of the TPCBP H-COF (5.697 mmol h-1) and TPCBP E-COF (5.165 mmol h-1), respectively, under visible light illumination for 8 h. The TPCBP B-COF structure is one of the best-performing catalysts for the corresponding photocatalytic hydrogen evolution in the literature, producing 1.029 mmol g-1 h-1 with a high apparent quantum efficiency of 79.69% at 470 nm. Our strategy provides new aspects for the design of novel COFs with respect to future metal-free hydrogen evolution by using solar energy conversion.
Yazarlar (4)
1
Sinem Altinisik
ORCID: 0000-0003-0238-0169
2
Gizem Yanalak
3
Imren Hatay Patir
ORCID: 0000-0003-2937-6557
4
Sermet Koyuncu
ORCID: 0000-0001-8352-8326
Anahtar Kelimeler
carbazole
covalent organic framework
hydrogen evolution
metal-free photocatalyst
viologen
Kurumlar
Çanakkale Onsekiz Mart Üniversitesi
Canakkale Turkey
Selçuk Üniversitesi
Selçuklu Turkey
Metrikler
15
Atıf
4
Yazar
5
Anahtar Kelime