The effect of phosphorous precursor on the CO oxidation activity of P-modified TiO2 supported Ag catalysts

Study of catalytic activity at the Ag/Al-SBA-15 catalysts for CO oxidation and selective CO oxidation

“…Comsup et al found that stronger Ag-TiO 2 interactions improved the catalytic activity for CO oxidation [14]. Doping of P and Si into TiO 2 resulted in different activities [15,16]. Lim et al found that CO oxidation activity on Ag/graphite was very sensitive to the particle size [17].…”

Phenyl Hypophosphorous Acid‐Assisted Synthesis of Carbon‐Modified Anatase‐Brookite Bicrystal TiO2 Nanoparticles with Enhanced Visible‐Light Photocatalytic Performance

“…The obvious peaks of Ti, O, P and C elements can be clearly detected in the survey spectrum of all the samples (Figure (a)). It is well known that the binding energy of P V in TiO 2 always presents in the range of 133.8–134.4 eV, while the P 2p of 0.005 C/TiO 2 (Figure (b)) shows only one peak in the 132.6 eV, implying that the valence state of P is monovalence calculated from structural formula of PA. Besides, the characteristic peak of P 2p in Ti−P at 128.6 eV is not observed, so that P species are mainly present in the samples with the form of Ti−O‐P .…”

“…The obvious peaks of Ti, O, P and C elements can be clearly detected in the survey spectrum of all the samples (Figure 4(a)). It is well known that the binding energy of P V in TiO 2 always presents in the range of 133.8-134.4 eV, [30] while the P 2p of 0.005 C/TiO 2 (Figure 4(b)) shows only one peak in the 132.6 eV, implying that the valence state of P is monovalence calculated from structural formula of PA. Besides, the characteristic peak of P 2p in TiÀP at 128.6 eV is not observed, so that P species are mainly present in the samples with the form of TiÀO-P. [31] As shown in Figure 4(c), the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 binding energy of Ti 2p3/2 and Ti 2p1/2 for 0.005C/TiO 2 are located at 458.1 and 464.3 eV, respectively, which is identical to the typical values of TiO 2 .…”

Chemical modification of TiO2 by H2PO4−/HPO42− anions using the sol-gel route with controlled precipitation and hydrolysis: enhancing thermal stability

“…These species tend to retard the phase transition of anatase to rutile and crystallite growth. Recently, phosphate/titanium dioxides have been obtained through different preparative * E-mail: K.elghniji@yahoo.fr routes entailing either surface modification of titanium oxide or hydroxide hydrate by anions, such as phosphates or sulfates [1][2][3][4][5][6][7][8] or hydrolysis of TiO 2 from corresponding titanium alkoxides in presence of phosphoric acid [9][10][11][12]. Ramadan et al [13] reported a study on titanium dioxide obtained from the hydrolysis of titanium ethoxide and phosphate by impregnation with ammonium hydrogen phosphate.…”