Palladium nanoparticles supported on biochar/graphitic carbon nitride as a heterogeneous catalyst for pharmaceutical degradation
Yükleniyor...
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
Sonocatalysis is a promising method for degrading organic pollutants in aqueous media. However, practical applications require the development of low-cost, green, and efficient sonocatalysts. This study investigated the removal of pharmaceutical compounds, such as tetracycline (TC), from water and wastewater via ultrasound (US)-based decomposition by Pd nanoparticles protected on biochar/graphitic carbon nitride (Pd@BC/g-C3N4). The constituents and characteristics of the catalysts were evaluated, and BC/g-C3N4 and Pd@BC/g-C3N4 were found to have bandgaps of 2.61, and 2.21 eV, respectively. Furthermore, the Pd@BC/g-C3N4 nanocomposite was confirmed to consist of Pd nanoparticles uniformly distributed on BC/g-C3N4. Pd@BC/g-C3N4 attained a degradation performance of 94.23 % after 120 min under the optimum conditions ([TC]0 = 10 mg/L, [Pd@BC/g-C3N4] = 0.03 g/L, and pH 6), whereas the degradation efficiency was only 78.33 % with BC/g-C3N4. The sonocatalytic activity did not decrease significantly during reusability experiments, demonstrating the high stability of the Pd@BC/g-C3N4 structure. The hydroxyl radicals (•OH) production during the sonocatalytic degradation of TC via the US/Pd@BC/g-C3N4 process was confirmed using photoluminescence measurements and scavenging experiments with o-phenylenediamine. Gas chromatography-mass spectrometry analysis of the TC degradation intermediates revealed short-chain compounds, suggesting considerable progress toward mineralization during the sonocatalytic process. Thus, Pd@BC/g-C3N4 has the potential as an efficient heterogenous sonocatalyst for wastewater remediation.
Açıklama
Anahtar Kelimeler
Advanced Water Treatment, Biochar, Graphitic Carbon Nitride, Nanocomposite, Sonocatalytic Process, Tetracycline
Kaynak
Journal of Environmental Chemical Engineering
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
12
Sayı
4
