Synthesis, characterization and photocatalytic properties of CaNb2O6 with ellipsoid-like plate morphology

Optical Properties of CaNb2O6 Single Crystals Grown by OFZ*

“…One strong and narrow excitation bond appears at 282 nm, and a strong blue emission band centered at 465 nm forms under 282 nm excitation. Previous works revealed that one emission peak is located at around 460 nm, and an excitation peak is found at around 260 nm [9,[16][17][18]. The luminescence of CaNb 2 O 6 strongly depends on its crystal structure [15,39,40].…”

“…In previous works, two types of transition, the direct and the indirect transitions, were reported for CaNb 2 O 6 . Yu-Jen Hsiao extrapolated that CaNb 2 O 6 was a direct transition for their nanocrystalline samples [16], while In-Sun Cho suggested an indirect transition for CaNb 2 O 6 bulk powder samples by fitting the absorption curve [9,17]. The band gap reported was from 3.04 to 3.93 eV [18,36].…”

“…So far, CaNb 2 O 6 samples with different forms, such as crystals, polycrystalline, and nanoparticles, have been investigated. However, some experimental results about band gap transition types are inconsistent [9,16]. In previous reports [19][20][21], data about the characterization of CaNb 2 O 6 crystals are limited.…”

“…CaNb 2 O 6 has been widely investigated [4][5][6][7][8][9][10][11][12][13][14][15]. However, its type of band gap transition has yet to be elucidated [9,[16][17][18]. So far, CaNb 2 O 6 samples with different forms, such as crystals, polycrystalline, and nanoparticles, have been investigated.…”

Effect of Nb2O5 doping on improving the thermo-mechanical stability of sealing interfaces for solid oxide fuel cells

“…In addition, the number of needle phases increases with increasing Nb 2 O 5 content. The CaNb 2 O 6 phase can be characterized with various morphologies including microneedles or ellipsoid-like shapes, depending on the processing conditions 19, 20 . This confirms the formation of a CaNb 2 O 6 phase in Nb 2 O 5 -doped glass-ceramics, in agreement with the XRD results.…”