Ceria nanoparticles anchored on graphitic oxide sheets (CeO2-GOS) as an efficient catalyst for degradation of dyes and textile effluents

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

“…The AC-CeO 2 nanocomposites were synthesized via an ultrasonication process by using the prepared AC nanoflakes and CeO 2 nanoparticles. Here, we note that the AC : CeO 2 ratio was fixed to 0.3 : 1 because previous studies [20] , [25] , [26] , [27] , [57] reported that, when using the AC-CeO 2 composites as a catalyst, the optimal ratio of AC: OSs was 0.3: 1 for demonstrating better catalytic performances. Initially, 1 g of CeO 2 nanoparticles were dispersed in DI water (100 ml) and stirred for 10 min.…”

“…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 . Among them, AC holds promise for materializing the high-performance photocatalytic AC-OS composites because of its extraordinary characteristics such as high absorption capacity, high chemical stability, large surface area, high porosity, high conductivity, and high microstructural tunability [26] , [27] , [28] .…”

Stainless steel catalyst for air pollution control: structure, properties, and activity

“…The starting point of the sol–gel method is a sol–gel dispersion of the coating precursor, which was initially used to prepare Al 2 O 3 coatings and was then gradually extended to other coatings such as ZrO 2 (Yu et al 2017 ), SiO 2 (Jeong et al 2022 ), TiO 2 (Khan and Malik 2022 ), CeO 2 (Kavitha et al 2022 ). An important factor in the process of sol–gel is the sol-gelation time.…”

Flower-like Ag2WO4/CeO2 heterojunctions with oxygen vacancies and expedited charge carrier separation boost the photocatalytic degradation of dyes and drugs

“…In addition, the semiconductor bandgap energy (E g ) values of Ag 2 WO 4 and CeO 2 are estimated according to αhν = A (hν − E g ) n/2 based on the Planck constant (h), optical absorption coefficient (α), energy independent constant (A), incident light frequency (ν), and semiconductor properties (n). 40 Since Ag 2 WO 4 and CeO 2 are direct transition semiconductors, n is equal to 1. 41,42 Notably, a linear fit is applied to the fundamental peak in the Tauc plot, but it is impossible to accurately determine the optical band gap of these photocatalysts because of their complex composite nature.…”