Selective Synthesis and Characterization of Single‐Crystal Silver Molybdate/Tungstate Nanowires by a Hydrothermal Process

Abstract

Selective synthesis of uniform single crystalline silver molybdate/tungstate nanorods/nanowires in large scale can be easily realized by a facile hydrothermal recrystallization technique. The synthesis is strongly dependent on the pH conditions, temperature, and reaction time. The phase transformation was examined in details. Pure Ag(2)MoO(4) and Ag(6)Mo(10)O(33) can be easily obtained under neutral condition and pH 2, respectively, whereas other mixed phases of Mo(17)O(47), Ag(2)Mo(2)O(7,) Ag(6)Mo(10)O(33) were observed under different pH conditions. Ag(6)Mo(10)O(33) nanowires with uniform diameter 50-60 nm and length up to several hundred micrometers were synthesized in large scale for the first time at 140 degrees C. The melting point of Ag(6)Mo(10)O(33) nanowires were found to be about 238 degrees C. Similarly, Ag(2)WO(4), and Ag(2)W(2)O(7) nanorods/nanowires can be selectively synthesized by controlling pH value. The results demonstrated that this route could be a potential mild way to selectively synthesize various molybdate nanowires with various phases in large scale.

Hierarchically nanostructured hydroxyapatite: hydrothermal synthesis, morphology control, growth mechanism, and biological activity

“…As seen in Figure 2F, the surface of the nanorod became rough after exposure to electron beam irradiation. Similar cases of one-dimensional structures changing their morphology under electron beam irradiation have been reported in; for example, PbCrO 4 rods, 57 Ag 6 Mo 10 O 33 rods, 58 and Bi nanotubes, 59 etc. The crystal phase and molecular structure of the typical sample were characterized by XRD and FTIR.…”

Experimental and Theoretical Investigations of Electronic Structure and Photoluminescence Properties of β-Ag2MoO4 Microcrystals

“…Recently, these disadvantages have been overcome by other synthetic methods. 6,7 The Ag 2 MoO 4 phase is obtained by the following chemical routes: controlled precipitation, 8,9 conventional hydrothermal (CH) technique, 10,11 and microwave-assisted hydrothermal (MAH) method. 12 In particular, both CH and MAH techniques received special recognition in the literature because of their unique characteristics, such as the use of water as solvent, low processing temperatures (≤200°C), and good control of particle sizes and shapes.…”

A combined theoretical and experimental study of electronic structure and optical properties of β-ZnMoO4 microcrystals

“…Recently, the hydrothermal (HT) method has attracted the attention of the scientific community in the preparation of different molybdates with several sizes, shapes and nanostructures [34][35][36]. In particular, this synthesis method enables the attainment of pure molybdate at low temperatures (120 o C -160 o C) in micro and nanoscale with excellent photoluminescence (PL) properties [37][38][39][40][41]. From a theoretical perspective, only one recent research [42] has been reported in the literature which shows band structure calculations and partial densities of states for the triclinic structure of α-ZnMoO 4 crystals using the full-potential linear-augmented-plane-wave method.…”