Effect of titania polymorph on the properties of CuO/TiO2 catalysts for trace methane combustion

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

“…Furthermore, since CO oxidation over the supported metal heterogeneous catalyst takes place at the metal support interface, TiO 2 , as reducible oxide, could provide the intrinsic activity to the entire reaction [149]. Therefore, only a small amount of CuO is loaded onto TiO 2 and influence of TiO 2 crystalline phase, which are indicative of the fact that the support system has higher efficiency and selectivity than the CO oxidation being examined [152]. …”

“…Therefore, it is necessary and important to further approach the change of heterogeneous catalyst surface with plasma-assisted processing. NO reduction by CO reaction was comparatively studied over microwave plasma pretreated CuO/TiO 2 heterogeneous catalysts employing transmission electron microscopy, H 2 temperature programmed reduction, and in situ Fourier transform infrared spectroscopy [152–154]. The CuO/TiO 2 heterogeneous catalytic performances indicated that a remarkable improvement in activity and selectivity was achieved after microwave plasma pretreatment, which depends on the microwave plasma pretreatment time [153].…”

Photocatalytic degradation of trichloroethylene in a continuous annular reactor using Cu-doped TiO2 catalysts by sol–gel synthesis

“…The O1s spectra present three peaks that appear in both samples (Fig. 7c,d), which are attributed to lattice oxygen from TiO 2 and copper oxides, surfaces hydroxyl oxygen/OH groups and adsorbed H 2 O at 530.07, 531.05, 532.35 eV and 530.45, 531.31, 532.24 eV for TiO 2 and TiO 2 -0.5, respectively [43][44][45][46][47]. The results shows that the TiO 2 -0.5 sample present more adsorbed oxygen than TiO 2 with relative areas of 22.52% (surface OH groups) and 24.57% (adsorbed H 2 O) compared with 19.79% and 19.85% from no doping sample.…”

Impact of the chemical precursor on the crystalline constitution of nano-CuO/TiO2 films

“…Nano-CuO/TiO 2 is studied at present since it can be used in solar energy conversion [1][2][3], sensors [4] and photocatalysis [5,6] applications. For the majority of these applications, it is convenient to use a film or layer of nano-CuO/TiO 2 .…”

“…If CuO is somehow deposited on the real (internal) surface, a nanostructured composite with a large CuO/ TiO 2 interface area may result. Different technologies have been used to fabricate CuO/TiO 2 interfaces as, wet-impregnation [1][2][3]5,6], sol-gel [9], and photoelectrochemistry [10,11].…”