Synthesis and characterization of barium molybdate nanostructures with the aid of amino acids and investigation of its photocatalytic degradation of methyl orange

Abstract

In the current study, barium molybdate (BaMoO 4 ) nanostructures were synthesized via a largescale and facile sonochemical method based on the reaction between barium(II) nitrate hexahydrate and (NH 4 ) 6-Mo 7 O 24 Á4H 2 O in an aqueous solution. Besides, two amino acids leucine and proline were introduce as capping agents and their effects on the morphology and particle size of barium molybdate were investigated. It was found that size and morphology could be easily realized by changing the type of amino acids. XRD, SEM, EDS, and UV-Vis spectroscopy were employed to characterize structural, morphological, and optical properties of BaMoO 4 nanostructures. Barium molybdate (BaMoO 4 ) nanostructures indicated a ferromagnetic behavior at room temperature, as evidenced by using vibrating sample magnetometer. Furthermore, the photocatalysis results reveal that the maximum decolorization of 75 % for methyl orange occurred with BaMoO 4 samples in 70 min under ultraviolet light irradiation.

Understanding the White-Emitting CaMoO4 Co-Doped Eu3+, Tb3+, and Tm3+ Phosphor through Experiment and Computation

“…Alkali-earth molybdates MMoO4 (M=Ca, Sr, Ba) include a wide range of scientifically and technologically significant compounds. These materials are chemically designed and further synthesized using different methods based on the final objective [5][6][7][8][9] . In particular, molybdates phosphors were implemented in optical applications [10][11] and evaluated extensively over the past century as a scintillating medium and electro-optical devices, given their broad and intense absorption bands due to the charge transfer (CT) from oxygen to the metal in the near-ultraviolet (UV) region [12][13][14][15][16] .…”

On the morphology of BaMoO4 crystals: A theoretical and experimental approach

“…These results are in good agreement with previous experimental observations and calculations. . In addition, theoretical and experimental results can be compared with previous studies of other scheelite‐type materials, where the calculations describe precisely the evolution of the crystal structure on pressure phases and help to understand the electronic and structural properties.…”

“…This compound has been prepared by a plethora of synthetic routes including solid‐state reactions, Czochralski techniques, spontaneous crystallization, microwave‐assisted synthesis, hydrothermal synthesis, co‐precipitation, microemulsion, and complex polymerization. Of these procedures, co‐precipitation has been demonstrated to be one of the most effective approaches to synthesize inorganic compounds with interesting morphologies and regular particle size. .…”

Synthesis of the Dy: SrMoO4 with High Photocatalytic Activity under Visible Light Irradiation

“…[7,8] Recent researches have shown that some molybdate compounds such as PbMoO 4 , NiMoO 4 , and BaMoO 4 exhibit photocatalytic properties of the degradation of organic pollutants. [9][10][11] Now, there are various modification approaches proposed including metal/nonmetal doping, heterojunction structure formation, and cocatatlysts loading in order to promote photocatalytic performance. [12][13][14][15][16][17] The doping will result in the modification of the surface properties of common semiconductors, and the recombination of photo-generated electron-hole pair is also hindered, and eventually the amount of the active sites is increased correspondingly.…”

“…Recent researches have shown that some molybdate compounds such as PbMoO 4 , NiMoO 4 , and BaMoO 4 exhibit photocatalytic properties of the degradation of organic pollutants . Now, there are various modification approaches proposed including metal/nonmetal doping, heterojunction structure formation, and cocatatlysts loading in order to promote photocatalytic performance .…”