Catalyst-Free Growth of Quasi-Aligned Nanorods of Single Crystal Cu₃Mo₂O₉ and Their Catalytic Properties

Abstract

We propose a simple and catalyst-free method to grow quasi-aligned single crystalline Cu(3)Mo(2)O(9) nanorods in terms of a mechanism differing from the conventional vapor-solid (VS) and vapor-liquid-solid (VLS) ones for chemical vapor deposition (CVD) methods by directly heating Cu foils in a mixed atmosphere of MoO(3) vapor and air. High quality Cu(3)Mo(2)O(9) nanorods can be simply grown in a temperature range from 450 to 550 degrees C whose diameter, length, and distribution density are dependent on both heating temperature and time. Interestingly, the growth rate at 550 degrees C drops significantly after 6 h. All nanorods grow along the [010] direction. On the basis of a proposed growth model, the nucleation of Cu(3)Mo(2)O(9) nanorods is believed to be governed by formation of initial polycrystalline Cu(x)O protuberances with nanoscale diameters on Cu foils which may act as growth "templates". This novel method can be applied to grow other similar tertiary transition metal oxide nanostructures on substrates with large sizes. Most importantly, these Cu(3)Mo(2)O(9) nanorods decrease the ignition temperature of Printex U model soot from 600 to 438 degrees C, being in between 200 and 450 degrees C of the exhaust of diesel-powered combustion engines, which are therefore expected to be a potential efficient and environmentally friendly catalyst for diesel exhaust combustion.

Influence of sintering temperature on the structural and morphological performance of CoMoO4

“…Metal molybdates, which can be seen as the prod uct of adding MO to MoO 3 , stand as important fami lies of inorganic materials and have been a subject of intensive research due to their many applications, including photoluminescence [1][2][3], magnetic prop erties [4][5][6][7], electronic properties [15,16], and catal ysis [5,7,[8][9][10][11][12].…”

Designing of nickel cobalt molybdate/multiwalled carbon nanotube composites for suppression of electromagnetic radiation

“…One-dimensional nanorod nanostructures are perfect structure blocks for nanoscale electronics, optoelectronics and sensing devices; meanwhile, they signify huge surface area, small space for mass and charge transport, and independence for volume change [9][10][11][12]. Metal molybdate, AMoO 4 -type compounds (where A is a divalent metal ion), is an attention-grabbing research subject owing to their possible application in many fields, such as magnetic properties, photoluminescence and catalysts [13][14][15][16][17]. Furthermore, the discovery of carbon nanotubes (CNTs) with the outstanding mechanical, electrical and thermal properties prepared them as a prospective applicant for high-tech applications.…”

Synthesis of Flower‐like Cu3[MoO4]2O from Cu3(MoO4)2(OH)2 and Its Application for Lithium‐Ion Batteries: Structure‐Electrochemical Property Relationships

“…Metal and metal oxide moiety in the Cu 3 [MoO 4 ] 2 O results synergistic effects and unique electrochemical properties for energy storage applications. As shape, size, structure, and texture of materials highly influence their characteristics and potential application, synthesis of various nanostructured Cu 3 [MoO 4 ] 2 O from 0D to 3D architecture, including various series of structures with different morphologies such as wire, rod, plate and belt have been reported in the literature. Generally, out of plane 3D‐nanostructured (nanoflowers) considerably enhances the intrinsic quality of the electric field, electromagnetic properties, optical properties, and light confinement by increasing surface area .…”