Synthesis and characterization of ilmenite NiTiO3 and CoTiO3 prepared by a modified Pechini method

Band-Gap Change and Photocatalytic Activity of Silica/Titania Composites Associated with Incorporation of CuO and NiO

“…3 b, curve 5) is notable for bands in UV ( = 350 nm) and visible light ( = 450, 530 and 800 nm) ranges. Similar situation was found in [78][79][80][81][82]. The positions of the bands defined using the Tanabe-Sugano diagrams [83] [82,84].…”

Influence of annealing on Fe-doped TiO2 powders using co-precipitation technique

“…Anatase and rutile structures of TiO2 exhibit certain strong FT-IR absorption bands in the region of 800-650 cm -1 [10]. In addition to this, the broad band appears at below 1150 cm -1 is due to Ti-O-Ti vibration [11]. Based on the FT-IR results, all the transmittance peak of Fe-doped TiO2 nanopowders can be summarized in Table.2.…”

Bimetal-organic-framework derived CoTiO3 mesoporous micro-prisms anode for superior stable power sodium ion batteries

“…As present in Table 1, the asprepared pure CoTiO 3 micro-prisms also deliver significantly higher capacity and better rate capability than typical carbon materials [9][10][11], and pure TiO 2 anode materials, meanwhile, show similar or even better electrochemical performance with N, Mo, Sn doped TiO 2 and ultra-small sized TiO 2 [13][14][15][16][17][18][19][20][21][22][23][24]. The better electrical conductivity of CoTiO 3 than NiTiO 3 , TiO 2 , because of the narrower band gap of CoTiO 3 (2.34 eV) than NiTiO 3 (3.02 eV) and TiO 2 (3.3 eV), should be one of the reason responsible for the much enhanced sodium ion storage performance [31,32]. Comparing to the reported counterparts, NiTiO 3 nanoparticle and micro-prisms, the initial capacity of CoTiO 3 are lower than reported NiTiO 3 [26,27], however, the preserved charge capacity of CoTiO 3 at 10 C after 2,000 cycles still kept 62.6 mA h g −1 , which is much higher than 51.1 mA h g −1 of reported NiTiO 3 [27].…”

“…Brown et al [28] also demonstrated that the large sized CoTiO 3 prepared by high temperature solid state method could deliver capacity of 139 and 128 mA h g −1 during the first and second charge at 15 mA g −1 in a sodium ion cell, which are much higher than that of 19 mA h g −1 on MnTiO 3 prepared by similar solid state method. Moreover, CoTiO 3 shows much lower band gap energy (2.34 eV), larger unit cell (a=5.49 Å) and relatively lower formation temperature (~500°C) than that of NiTiO 3 (3.02 eV, 5.44 Å, and~550 o C, respectively) [27,31,32]. Therefore, CoTiO 3 should be more conductive and can provide larger space to accommodate the volume change during the sodiation process.…”