Effect of Mn loading onto hydroxyapatite supported Mn catalysts for toluene removal: Contribution of PCA assisted ToF-SIMS

Cu−Mn Hydroxyapatite Materials for Toluene Total Oxidation

“…The existence of interactions between the TM and hydroxyapatite in TMHap (TM = Cu or Mn) materials is evidenced by the presence of a series of cluster ions involving TM and Ca or P and both (see Table S3, S4, 4). Based on these results, it is found that Cu and Mn preferentially interact with Ca rather than P. This statement has already been reported in the case of Hap supported Mn samples by Chlala et al [37] These observations suggest the occurrence of an ion (Ca-Cu/Mn) exchange at the outermost layers oft the samples. Interestingly for the CuMn based samples, the ToF-SIMS spectra in positive polarity exhibit a series of mixed CuxMnyOzHw + (x = 1; y = 1; z = 0,1; w = 0-2) ions (see For example the ToF-SIMS (+) spectrum of Cu2MnHap in the m/z 133-138 range displayed in Figure 6 evidences the CuMnO + and CuMnOH + secondary ions.…”

“…The X-ray diffractogram of MnHap shows a new distinct broad peak located at 2θ = 37.1 ° which can be tentatively attributed to the akhtenskite ε-MnO2 (PDF n ° 00-030-0820) phase (Figure S1) which was not previously detected in similar conditions [37] .…”

“…[29][30][31][32][33][34] In fact, a review on the use of hydroxyapatite as a multifunctional material for air, water and soil pollution control has been recently published. [35] Previous studies have aimed to study the effect of TM content on the performances of copper [36] and manganese [37,38] based active phases dispersed on Hap in the total oxidation of toluene to be correlated with the speciation and dispersion of the TM. For the TM-based Hap supported catalysts (TM = Cu, Mn), the maximum of activity is achieved for a low amount of Cu (wt%: 2.5 %) compared with those of 5-10 wt% for Mn.…”

Synergistic effect of dielectric barrier discharge plasma and Mn catalyst on CO2 reforming of toluene

“…Furthermore, Ag-based catalysts were shown to give the highest removal efficiency in the degradation of VOCs [35,36]. Manganese oxides (MnxOy) have also previously been tested as a catalyst along with DBD for VOC degradation with high efficiencies [37][38][39]. Lu et al [44] studied plasma-catalytic oxidation of toluene on a manganesebased catalyst in an atmosphere of 80% N2+20% O2.…”

Dimensional Stacking for Machine Learning in ToF‐SIMS Analysis of Heterostructures

“…PCA was used for recognizing many descriptors related to surface composition. For example, it was used to investigate surface products of smithsonite (ZnCO 3 ), [ 9 ] to elucidate activation of marmatite surface (Fe‐rich (Zn,Fe)S with Pb adsorption), [ 10 ] to detect MnO x loading of hydroxyapatite for catalysis, [ 11 ] to distinguish various protein mixtures, [ 12 ] to probe the orientation of surface‐immobilized antibodies, [ 13 ] to quantify the molecular weight of the micro‐chains at the surface of polystyrene, [ 14 ] to differentiate calcium carbonate polymorphs, [ 15 ] and to categorize myrtle berries based on the surface concentration of triacontanoic acid [ 16 ] among many others. [ 17,18 ] In addition to surface analysis, PCA has also been traditionally applied to obtain 3D compositional information as inner layers are accessed through sputtering.…”