A novel polyaniline/NiO nanocomposite as a UV and visible-light photocatalyst for complete degradation of the model dyes and the real textile wastewater
Yükleniyor...
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The textile processing industry utilizes enormous amounts of water. After the dying process, the wastewater discharged to the
environment contains carcinogens, non-biodegradable, toxic, and colored organic materials. This study aimed to develop a
nanocomposite material with improved photocatalytic activity to degrade textile dyes and without a need for a post-separation
process after the use. For this, nickel oxide nanoparticles (NiO NPs) were synthesized by a simple method in aqueous media.
Then, NiO-doped polyaniline (PANI/NiO) with efficient absorption in the visible region (optical band gap of 2.08 eV) synthesized on a stainless steel substrate with electropolymerization of aniline in the aqueous media. The photocatalytic activity of
PANI/NiO film was also investigated by the degradation of model dyes. Under UV and visible light irradiation, the PANI/NiO
film degraded methylene blue and rhodamine B dyes entirely in 30 min. Moreover, the PANI/NiO film was also utilized to
degrade real textile wastewater (RTW) without applying any pre-process; it was entirely decomposed by the nanocomposite film
in only 45 min under UV light irradiation. The photocatalytic reaction rate of the pure PANI film is increased as 2.5 and 1.5 times
with the addition of NiO NPs under UV and visible light irradiations for degradation RTW, respectively. The photocatalytic
efficiency was attributed to reduced electron-hole pair recombination on the photocatalyst surface. Furthermore, the photocatalytic stability is discussed based on re-use experiments. The photocatalytic performance remains nearly unchanged, and the
degradation of dyes is kept 94% after five cycles.
Açıklama
Anahtar Kelimeler
Photocatalysis, NiO NPs, Polyaniline Film, Electrochemical Polymerization, Methylene Blue, Rhodamine B, Real Textile Wastewater
Kaynak
Environmental Science and Pollution Research (ESPR)
WoS Q Değeri
Q2
Scopus Q Değeri
Cilt
28
Sayı
6
Künye
Taymaz, B. H. (n.d.). A novel polyaniline/NiO nanocomposite as a UV and visible-light photocatalyst for complete degradation of the model dyes and the real textile wastewater.
