Supersonic microwave co-assistance (SMC) efficient synthesis of red luminescent Eu3+ activated silver molybdates and their phase-dependent evolution processes

Silver Molybdate and Silver Tungstate Nanocomposites with Enhanced Photoluminescence

“…08-0473. This result supports previous reports and showed that this phase usually formed near pH 7 [32,40,43]. Similarly, the pattern of our silver tungstate Whtmw exactly matched the JCPDS card no.…”

“…The microstructures of the -70 samples are shown in Figure 4. In contrast to Mo- htmw, the Mo- 70 sample showed crystals of two different types Figure 4a): nanowires several dozen Mm long and 100–200 nm in diameter, which closely resembled the monoclinic Ag 2 Mo 2 O 7 fibres often obtained in hydrothermal experiments carried out at pH 4 [32,40,43].…”

“…However, from the XRD data, the formation of this silver dimolybdate was ruled out. These nanowires coexisted with well-shaped cubic or cuboctahedral microcrystals, almost monodisperse in size (about 3 pm) and contrasting with the irregular nanoparticles usually observed for hydrothermally grown (at a pH of about 7–8) Ag 2 MoO 4 samples [32,39–40,43]. Although exhibiting very different morphologies, these two types of crystals clearly belonged to the same β -Ag 2 MoO 4 phase.…”

Plasmonic properties of an Ag@Ag2Mo2O7 hybrid nanostructure easily designed by solid-state photodeposition from very thin Ag2Mo2O7 nanowires

“…Traditional hydrothermal and more recent microwave methods were commonly used to design nano-and microstructurated Ag2Mo2O7 with various morphologies such as nanoparticles, 8 nanowires, [28][29][30] nanoflowers, 31 broom-like microstructures, 31 or micro-rods. [31][32][33] However, it was often obtained impure with other silver molybdates, 16,[34][35][36] and the composition of the mixtures is extremely pH-dependent. 31,34,37 Beside Ag2Mo2O7 exhibits both monoclinic (m-Ag2Mo2O7) 38 and triclinic (t-Ag2Mo2O7) 39 polymorphs (Figure 1b) that can co-precipitate, 31 and the synthesis parameters governing their relative stability remain still unclear.…”

Ultrasound assisted synthesis of CaF2:Eu3+ phosphor nanoparticles

“…It is well known that in the field of basic science and chemical engineering, the main objectives of green chemistry are to provide the best platform for the development of new synthetic methods and processes which do not have adverse effects on human health and the environment. Therefore, microwaves or ultrasound assisted synthesis techniques are the best fit for green synthesis routes . Historical background shows that the discovery of the piezoelectric effect (1880s) is the basis for the currently used ultrasonic devices .…”