Study of cyclohexanol decomposition reaction over the ferrospinels, A1−xCuxFe2O4 (A=Ni or Co and x=0, 0.3, 0.5, 0.7 and 1), prepared by ‘soft’ chemical methods

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

“…Such effects were greatly dependent on the occupancy of substituting metals. As the octahedral sites are almost exclusively exposed at the surface of the spinel structure, the catalytic activity relied on the octahedral Fe 2+ rather than the tetrahedral ones [56]. From AOII degradation and Å OH generation test, the catalytic activity of magnetite varies significantly with Mn content, which should be related to the changes of Mn coordination environment (Fig.…”

The UV/Fenton Degradation of Tetrabromobisphenol A Catalyzed by Nanocrystalline Chromium Substituted Magnetite

“…[7][8][9][10][11][12][13][14] One of the most promising applications should be as heterogeneous Fenton catalysts in the degradation of organic pollutants, e.g., dyes, phenol and hydroquinone, [15][16][17][18] due to the merits of easy handling, low cost, nontoxicity and environmental harmony. [19][20][21][22] It has been widely acknowledged that the catalytic activity of magnetite is greatly dependent on the species, valence and occupancy of substituting * Author to whom correspondence should be addressed.…”

The valence and site occupancy of substituting metals in magnetite spinel structure Fe3−xMxO4 (M = Cr, Mn, Co and Ni) and their influence on thermal stability: An XANES and TG-DSC investigation

“…But for Ni 2þ , it does not participate in the heterogeneous Fenton reaction, because only Ni 2þ species are stable and cannot initiate OH generation. The octahedral sites are almost exclusively exposed at the surface of the crystallite and the catalytic activity is mainly related to the octahedral cations [13].…”