Photocatalytic degradation of organic dyes under visible light on sol-gel derived M/ZnO (M=Cr, Mn, Sn, Fe, Ni, Cu, Co, Ba) catalysts
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A series of ZnO photocatalysts were developed by sol-gel method for photocatalytic degradation of dyes in textile wastewater under visible light irradiation. Eight different metal elements (barium, cobalt, copper, chromium, iron, manganese, nickel, and tin) were incorporated into ZnO structure to improve the photocatalytic activity of the samples in the visible region. The synthesized particles were characterized by X-ray diffraction, inductively coupled plasma, N-2 adsorption techniques and UV-vis diffuse reflectance spectroscopy. Two different types of dyes, rhodamine B and methylene blue, were used to study the effect of dye structure on degradation rates. The results showed that addition of different metal elements on ZnO structure had remarkable effects on textural and optical properties, crystal structures, and photodegradation rates. The surface area of ZnO increased with the metal ion additives. The band gap energy of the ZnO was reduced by addition of Sn dopant. The diverse photocatalytic trends of metal-doped ZnO samples for both dyes undoubtedly showed the significant and drastic effect of metal dopant on the photocatalytic activity. For photodegradation of both rhodamine B and methylene blue under visible light, Sn doped ZnO showed the highest photocatalytic owing to the decreased band gap of ZnO and suppressed recombination of electron-hole pairs. The pH of the reaction medium had also significant effect on degradation rate.
Açıklama
Anahtar Kelimeler
Metal-doped ZnO, Photodegradation, Sol-gel method, Photocatalytic effect
Kaynak
Journal Of Sol-Gel Science And Technology
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
103
Sayı
1
