Catalytic degradation of Orange II in aqueous solution using diatomite-supported bimetallic Fe/Ni nanoparticles. Issue 14 (16th February 2018)

• Record Type: Journal Article
• Authors: Ezzatahmadi, Naeim; Bao, Teng; Liu, Hongmei; Millar, Graeme J.; Ayoko, Godwin A.; Zhu, Jianxi; Zhu, Runliang; Liang, Xiaoliang; He, Hongping; Xi, Yunfei
• Is Part Of: RSC advances. Volume 8:Issue 14(2018)
• Page Start: 7687
• Page End: 7696
• Publication Date: 2018-02-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra13348k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A functional diatomite-supported Fe/Ni nanocomposite successfully remediated Orange II contaminant in aqueous solution. Abstract : A functional diatomite-supported Fe/Ni nanocomposite successfully remediated Orange II contaminant in aqueous solution. The hypothesis was that diatomite-supported Fe/Ni would not only be more effective than Fe/Ni but also require less metallic loading to effect the catalytic reaction. Batch experiments indicate that 99.00% of Orange II was removed using diatomite-supported Fe/Ni, while only 86.64 and 3.59% of Orange II were removed using bimetallic Fe/Ni nanoparticles and diatomite, after 6 h of reaction, respectively. Characterisation by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) indicates that the use of diatomite as a support material reduced the aggregation of bimetallic Fe/Ni nanoparticles, thereby resulting in an enhancement in the reactivity. A synergistic mechanism for the removal of Orange II by diatomite-supported Fe/Ni was proposed which involves adsorption, followed by catalytic reduction. This study has demonstrated that diatomite may be a suitable support material for stabilizing and dispersing bimetallic Fe/Ni nanoparticles and the resulting diatomite-supported Fe/Ni composite could be a promising catalyst for the remediation of dye-contaminated wastewater.