NaCe(MoO4)2 microcrystals: Hydrothermal synthesis, characterization and photocatalytic performance

Blue‐light‐excited NaCe(MoO4)2 microcrystals for photoelectrochemical water splitting

“…Regarding the stabilization time, Figure 8 shows a typical chronoamperometric measurement recorded in NaCe(MoO 4 ) 2 /ITO, using 0.1 mol l −1 Na 2 SO 4 and chopped (1 blue-light illumination. The result is represented by well-defined phototransients that stabilizes from t = 1000 s. As for pH (3)(4)(5)(6)(7)(8)(9)(10)(11), the inset of Figure 8 shows a progressive increase in I s as the medium becomes more alkaline, remaining practically constant between pH 9 and 11. In an alkaline medium, there is a high OHconcentration that reacts quickly with the photogenerated holes, preventing charge recombination and consequently increasing the photocurrent response.…”

“…NaCe(MoO 4 ) 2 microcrystals were prepared by the conventional hydrothermal method, following a synthesis route developed by Moura et al 9 In a typical procedure, 6.9 × 10 −3 mol of dihydrate sodium molybdate (Na 2 MoO 4 .2H 2 O, 99.5% purity, Sigma‐Aldrich) and 4.7 × 10 −3 mol hexahydrate cerium nitrate (Ce(NO 3 ) 3 .6H 2 O, 99.8% purity, Sigma‐Aldrich) were separately dissolved in 30 ml of deionized water and stirred for 15 minutes. The two solutions were mixed and then transferred into a Teflon autoclave, which was sealed and kept at 423 K for 6 h at a heating rate of 2 K min −1 .…”

“…Molybdates have attracted the attention of several research groups mainly due to their energy conversion applications as photocatalysts, 6 photoanodes, 5 anodic materials for sodium‐ion batteries, 7 and modifiers for gas sensors 8 . In particular, sodium‐cerium molybdate—NaCe(MoO 4 ) 2 —is a scheelite‐type semiconductor material with an energy band gap ( E gap ) between 2.57 and 2.58 eV, 9,10 and stands out for its impressive luminescent and photocatalytic properties under visible light irradiation 9‐11 …”

“…impressive luminescent and photocatalytic properties under visible light irradiation. [9][10][11] However, the literature does not present studies on photoelectrochemical properties of NaCe(MoO 4 ) 2 and its implementation in emerging and sustainable energy technologies. To fill part of this gap and deepen the knowledge about the physicochemical properties of double molybdates, this study presents the structural, morphological, optical, and photoelectrochemical parameters of NaCe(MoO 4 ) 2 microcrystals under blue-light irradiation.…”

Microwave sol-gel synthesis, microstructural and spectroscopic properties of scheelite-type ternary molybdate upconversion phosphor NaPbLa(MoO4)3:Er3+/Yb3+

“…Complex molybdates are actively investigated as host materials for the creation of rare-earth doped phosphors appropriate for the use in lightemitting devices [1,2,[11][12][13][14][15]. Among such crystals, scheelite-type molybdates are widely investigated in terms of searching new structures, including structure-modulation effects, and promising spectroscopic characteristics [15][16][17][18][19]. One of the most representative scheelite-type molybdates is the PbMoO4 compound, which is suitable for laser application, can be used as a low temperature scintillator crystal and as a working medium in an acoustic-optical light modulator [20][21][22].…”