Hydrothermal synthesis of bamboo-shaped nanosheet KNb3O8 with enhanced photocatalytic activity

Epitaxial growth and cationic exchange properties of layered KNb3O8thin films

“…39 In polycrystalline materials, it was reported that the KNb 3 O 8 particles have an elongated plate-like or wire-like morphology. 10,35,40,41 In reason of this particular morphology, wire-like KNb 3 O 8 was used as precursor to obtain by topochemical methods low-dimensional Nb 2 O 5 crystals that are of interest for catalysis. [42][43][44] So far, no synthesis of the KNb 3 O 8 phase as lm or coating has been reported.…”

“…In addition, lamellar-shaped lms are expected to show better photocatalytic properties than the rod-shaped lms. Indeed, the effect of the shape of powder KNb 3 O 8 and HNb 3 O 8 crystals on photocatalytic properties was recently studied by Li et al and Liu et al 6,10 Both groups found that belt shaped crystals present higher photocatalytic properties than the rod-like crystals.…”

“…[1][2][3][4] Among these compounds, the KNb 3 O 8 potassium triniobate phase (see crystal data in Table 1; 5 energy gap: 3.7 eV) 6 shows luminescence, 7,8 and excellent UV photocatalytic activity for degradation of dyes, 9,10 for catalytic synthesis of monoethylene glycol (used as intermediate for polyester ber production), 11 and for catalytic reduction of CO 2 in methane. higher UV photocatalytic activity that their bulk counterpart for degradation of organic contaminants, reduction of CO 2 and decontamination of water.…”

Controllable interlayer space effects of layered potassium triniobate nanoflakes on enhanced pH dependent adsorption-photocatalysis behaviors

“…It also has a 2D layered structure consisting of linked NbO 6 octahedral units. K + ions exist between the negatively charged layers to maintain the charge balance 10 – 13 .…”

“…At this stage, although there are some reports on using hydrothermal method to prepare KN, their specific surface areas are urgently desired to improve. Moreover, most of these hydrothermal experiments were conducted under acidic conditions 13 , 21 – 23 , which promoted an ion exchange reaction between K + and H + . It was noteworthy that, our previous study has demonstrated that layered K 4 Nb 6 O 17 can be successfully synthesized by one step hydrothermal reaction using Nb 2 O 5 and KOH as the starting materials 20 .…”