Post-calcination effects of sodium tantalate synthesized by microwave-assisted hydrothermal method and its photocatalytic performance under UV and visible light

Selective styrene oxidation on alkaline tantalates ATaO3 (A = Li, Na, K) as heterogeneous catalysts

“…Additionally it is also present the main molecular absorption band of the perovskite structure at 610 cm −1 assigned to the asymmetric stretching vibration for TaeO bond and the stretching of longer bridging Ta-O-Ta bonds in the distorted TaO 6 octahedra [24]. The largest intensity and well defined band at 604 cm −1 for LiTaO 3 is attributed to the symmetrical rhombohedral perovskite structure [21] and for NaTaO 3 the spectrum is quite similar to the reported by M. Yeh et al [15]. In agreement with XRD results, the presence of carbonates as segregated phases only for KTaO 3 are also detected with the appearance of the bands at 1365 and 1402 cm −1 associated to CeO bond [25].…”

“…Perovskite type compounds (ABO 3 ) have been extensively studied as electronic and magnetic materials [13]. Recently, the generation of hydrogen by water splitting reactions [14] and photodegradation of organic compounds [15] on perovskites compounds has been also reported. Such number of catalytic oxidation applications has been attributed to their well-known properties of oxygen mobility and large stabilization of transition metals in not usual oxidation states within their structure [16].…”

Construction of an S-Scheme Ag2MoO4/ZnFe2O4 Nanofiber Heterojunction for Enhanced Photoelectrocatalytic Activity under Visible Light Irradiation

“…The recombination efficiency of photogenerated e – and h + can be analyzed by fluorescence spectroscopy . In general, the PL intensity is directly proportional to the recombination of e – and h + pairs …”

“…The recombination efficiency of photogenerated e − and h + can be analyzed by fluorescence spectroscopy. 65 In general, the PL intensity is directly proportional to the recombination of e − and h + pairs. 66 Figure S3a illustrates that the AMO/ZFO composite fibers all form characteristic peaks at 468 nm.…”

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

“…7. As can be seen, NaTaO 3 has a broad band between 500 cm −1 and 800 cm −1 , attributed to Ta-O stretching and Ta-O-Ta bridging stretching mode [30,36]. For CTAB, the peak at 2916 cm −1 and 2848 cm −1 corresponds to asymmetric and symmetric vibrations of -(CH 2 )-respectively, while the peaks at 1472 cm −1 and 1383 cm −1 are attributed to asymmetric and symmetric -C-H vibrations of the quaternary ammonium moiety, respectively [17,37,38].…”