Selective oxidation of propylene to acrolein over silver-promoted hexagonal molybdates and derivative Ag/Ag2Mo4O13/α-MoO3 composites

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag1.94Cu0.06MoO4 Solid Solution

“…Therefore, the replacement of Ag + on the site .-3m (Wyckoff 16d) by Cu 2+ (Table S2) induces expansion of the unit cell, 12 consequently increasing the unit cell volume from 808.85(2) Å 3 (β-Ag 2 MoO 4 ) to 809.43(7) Å 3 (β-Ag 1.94 Cu 0.06 MoO 4 ). 13 Figure 1e shows the Fourier map of the electronic density of the samples. First, the electronic density for silver atoms for a solid solution shows different levels for positive and negative density, confirming that the insertion of copper ions in the structure has resulted in distortions of the Ag−O and Mo−O bond length and bond angle.…”

“…On the basis of these results, it is confirmed that the lattice parameters for β-Ag 2 MoO 4 and β-Ag 1.94 Cu 0.06 MoO 4 are a = b = c = 9.317(3) and 9.319(5) Å, respectively. Therefore, the replacement of Ag + on the site .-3m (Wyckoff 16d) by Cu 2+ (Table S2) induces expansion of the unit cell, consequently increasing the unit cell volume from 808.85(2) Å 3 (β-Ag 2 MoO 4 ) to 809.43(7) Å 3 (β-Ag 1.94 Cu 0.06 MoO 4 ) …”

“…Molybdenum oxide compounds are a well-known semiconductor family that has been investigated for several applications such as catalysts, − sensors, , photocatalysts, , microbial agents, , and photoluminescence (PL). − Silver molybdate (Ag 2 MoO 4 ) is an important member of this family and has two polymorphs: α-Ag 2 MoO 4 with a tetragonal structure and α-Ag 2 MoO 4 , which exhibits a cubic spinel-like structure. ,, Therefore, stick, flower, and potato morphologies have been synthesized for these materials. β-Ag 2 MoO 4 has aroused great interest because of its good chemical stability at high temperatures, in addition to presenting a range of applications in different fields including energy storage, antimicrobial agents, , photocatalysis, , and PL. , However, β-Ag 2 MoO 4 has an effective photon absorption in the ultraviolet region, which is limited to several photonics applications. , For this reason, the insertion of dopants on these materials such as rare-earth metals have been extensively studied .…”

Glycerin to Acrolein: Can Renewable Processes Challenge Traditional Processes?

“…Previous work focused mainly on catalysts and optimization of technical conditions. Zhang et al studied various catalysts and process conditions for all these processes [27][28][29][30][31][32]. An et al studied the separation process of acrolein by simulation [33,34].…”

Sonochemical synthesis of inorganic cryogel Ag2Mo3O10@Ag/AgO: structural characterization, antibacterial activity, and dye adsorption properties

“…13 Many kinds of materials were designed as dye absorbents such as metal oxides, 14 carbon-based materials, 15 polymeric materials, 16 magnetic materials, 17 and cryogels. 18 In recent years, various multi-component metal composites such as cobalt/selenium, 19 platinum/selenium, 20 silver/tungsten oxide, 21,22 molybdate/silver and their oxides 23,24 have been reported. Silver molybdenum oxides are one of the metal oxidebased dye adsorbents that have been synthesized over the past decades through various methods such as hydrothermal treatment, 25 coprecipitation, 26 and laser annealing 27 with different morphology.…”