Palladium nanoparticles embedded over chitosan/?MnO2 composite hybrid microspheres as heterogeneous nanocatalyst for effective reduction of nitroarenes and organic dyes in water
Yükleniyor...
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
Effective remediation of toxic organic pollutants such as nitroarenes and dyes from water systems is an important global issue for purification of drinking water or wastewater. Therefore, the development of effective strategies to treat these pollutants has recently become a critical and fundamental issue, and one of the most useful methodologies is to utilize heterogeneous catalysts. In this regard, a novel nano-sized heterogeneous catalyst system was designed in the present study by stabilizing palladium nanoparticles on the composite hybrid microspheres based on chitosan and ?MnO2 which was developed as the stabilizer (Pd/CS/?MnO2). The morphological/structural characterization of Pd/CS/?MnO2 nanocatalyst was carried out by SEM, XRD, TEM, BET, EDS, FT-IR, and TG analyses. Then, the catalytic role of Pd/CS/?MnO2 nanocatalyst was evaluated towards catalytic reduction of some environmental pollutants such as 2-nitroaniline (2-NA), 4-nitrophenol (4-NP), 4-nitroaniline (4-NA), 4-nitro-o-phenylenediamine (4-NPD), congo red (CR), methylene blue (MB), methyl orange (MO), methyl red (MR), and rhodamine B (RhB) in water by using NaBH4 at room temperature. The tests showed that Pd/CS/MnO2 effectively and rapidly catalyzed the reduction of these pollutants and could be reused up to 8 cycles. Additionally, it was found that the catalytic activity of Pd/CS/?MnO2 nanocatalyst was superior to those of many catalysts against the same reduction reactions. This paper concludes that Pd/CS/?MnO2 nanocatalyst appears to have a high potential to serve as an effective catalyst for remediation of wastewater thanks to its facile preparation, low cost, and good catalytic activity.
Açıklama
Anahtar Kelimeler
MnO2, Palladium, Reduction, Wastewater
Kaynak
Journal of Organometallic Chemistry
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
963
Sayı
-
