Synthesis, characterization, and optical properties of Ag₂Mo₂O₇ nanowires

Abstract

Ag2Mo2O7 nanowires were synthesized by facile hydrothermal method from sodium molybdate and silver nitrate at temperature of 150 °C without any surfactant or template. The synthesized product was characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and transmission electron microscopy (TEM). It was found that the product is of anorthic phase and single crystalline nanowires with width of 200 nm and length up to 100 µm. UV–Visible reflection spectrum demonstrated a band gap of 2.94 eV. Photoluminescence (PL) spectrum exhibited strong violet emission centered at 412 nm and red emission ranging from 600 to 700 nm at room temperature. The greatly enhanced red emission was observed at low temperature. The emission mechanism has been discussed according to the calculated results of electron density of states (DOSs) for Ag2Mo2O7 with consideration of oxygen vacancies by using the Vienna ab initio simulation package (VASP).

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

“…A possible alterna-tive for the reduction of these problems and the production of these crystals at a low temperature can be the use of wet chemical methods such as coprecipitation controlled/calcination [31,32] and citrate complex precursors [33]. 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].…”

Room temperature synthesis and photocatalytic property of AgO/Ag2Mo2O7 heterojunction nanowires

“…Similar phenomenon has been found when there is a rise in growth reaction time at a constant temperature. To compare the samples synthesized by the stirring method at low temperature and ambient pressure with the sample synthesized at higher temperature and higher pressure, we synthesized the sample by the hydrothermal method at 150 8C for 24 h [18]. The SEM and TEM (inset) images in Fig.…”

“…From reflection spectrum, the Kubelka-Munk function can be known, which is defined as the ratio between the absorption coefficient and scattering factor from the optical diffuse reflectance spectrum [20]. By extrapolating the linear part of Kubelka-Munk function, a clear optical gap of about 2.74 eV corresponding to the absorption edge of 454 nm can be obtained, which is 0.2 eV, less than 2.94 eV for the pure Ag 2 Mo 2 O nanowires reported before [18]. …”

Thermoluminescence properties of Al2O3:Tb nanoparticles irradiated by gamma rays and 85MeV C6+ ion beam

“…Moreover, large number of these nanostructures were evaluated for different applications. In the field of ionizing radiation dosimetry, a good number of these nanostructures were produced and studied for their response to both sparsely and densely ionizing radiations [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These nanostructures were found to have excellent thermoluminescent (TL) dosimetric properties, particularly their response in a wide span of exposures.…”

“…This is due to different spatial dose distribution, which causes saturation effects in the case of densely ionizing radiation [30]. On the other hand several nanostructure materials showed saturations at only very high doses [7][8][9][10][11][12][13][14][15][16][17][18][19][20] and thus might be the ultimate choice for ion beam dosimetry mainly carbon ions beam.…”