Sonochemical preparation and characterization of Sm‐doped GO/KSrPO₄ nanocomposite photocatalyst for degradation of methylene blue dye

Abstract

The present work pertains to synthesis of Sm-doped GO/KSrPO 4 (GO/KSrPO 4 : Sm) nanocomposite using ultrasound-assisted method. Successful decoration of graphene oxide sheets with the KSrPO 4 :Sm 3+ phosphor was confirmed using analysis techniques including SEM, EDS, UV/visible spectrometry, XRD, and FTIR of the prepared GO/KSrPO 4 :Sm nanocomposite. Further, photocatalytic activity of this nanocomposite material was studied by examining degradation of methylene blue (MB) dye from water. The effects of several parameters like concentration of Sm 3+ in KSrPO 4 :Sm 3+ phosphor within the GO/KSrPO 4 :Sm nanocomposite photocatalyst, photocatalyst loading, initial dye concentration, pH, and preparation method were evaluated. At a higher concentration of

Enhanced photocatalytic crystal-violet degradation performances of sonochemically-synthesized AC-CeO2 nanocomposites

“…However, the large bandgap energy (3.2 eV) and the high photocarrier recombination rate of the CeO 2 nanostructures have somewhat degraded their photocatalytic activities [13] , [14] . To overcome such drawbacks, hybridization of CeO 2 with transition metal oxides [15] , [16] , [17] , [18] , noble metals [19] , and/or carbon nanostructures ( e . g ., reduced graphene oxide [20] , [21] , carbon nanotubes [22] , graphene [11] , [23] , graphene oxide [24] , [25] , and activated carbon (AC) [26] , [27] ) has been conceived and demonstrated as an effective way for enhancing the photocatalytic performances of CeO 2 .…”