Immobilization of palladium nanoparticles on thiol-functionalized multi-walled carbon nanotubes with enhanced photocatalytic activity for the degradation of alizarin red. (1st June 2019)

• Record Type: Journal Article
• Authors: Veisi, Hojat; Tatli, Somayeh; Haghgoo, Mohammad; Amisama, Abbas; Farahmand, Shohreh; Hemmati, Saba
• Is Part Of: Polyhedron. Volume 165(2019)
• Page Start: 9
• Page End: 16
• Publication Date: 2019-06-01
• Subjects: Multi-walled carbon nanotubes -- Thiols -- Palladium -- Photocatalyst -- Catalytic degradation; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2019.03.002
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: A new heterogeneous photocatalyst based on palladium supported on thiol-functionalized multi-walled carbon nanotubes (MWCNTs/Si-SH/Pd) is described for degradation of Alizarin red in aqueous solution. Abstract: In this article the new heterogeneous photocatalyst based on palladium supported on thiol-functionalized multi-walled carbon nanotubes (MWCNTs) has been introduced. The synthetic process of preparation of mentioned nanocatalyst (MWCNTs/Si-SH/Pd) has been described. The formation of nanocatalyst was analyzed by FTIR, Raman spectroscopy, EDS, TEM, SEM, WDX and ICP. The photocatalytical activity of this photocatalyst material was determined by degradation of organic dye Alizarin red in aqueous solution and in the presence of hydrogen peroxide. The effect of the reaction time, solution pH, and concentration of photocatalyst has been studied. The photocatalytic activity of the heterogeneous photocatalyst were assessed by analyzing the decrease in concentration of the Alizarin red as a colorant after exposure to UV irradiation. The work operated in a photoreactor with less energy consumption about 16 watts. The results clarify that the Alizarin red concentration decreases continuously, concomitant with the UV irradiation time up to 150 min. The mineralization of this dye has been confirmed by Chemical Oxygen Demand (COD) measurements. Finally, this mesoporous material heterojunction nanocatalyst was stable and could be easily recycled several times opening new avenues for potential industrial applications.