Synthesis of PbCrO₄ and Pb₂CrO₅ Rods via a Microwave-Assisted Ionic Liquid Method

Abstract

Lead chromate (PbCrO 4 ) rods and dilead pentaoxochromate (Pb 2 CrO 5 ) with bundle-like and rod-like morphologies have been successfully synthesized by a simple microwave-assisted ionic liquid method. In the presence of NaOH, single-crystalline Pb 2 CrO 5 bundles and rods could be synthesized by microwave heating a solution containing lead acetate and potassium dichromate at 90 °C for 10 min. However, single-crystalline PbCrO 4 rods could be prepared by microwave heating at 50 °C for 10 min without using NaOH. The single-crystalline Pb 2 CrO 5 and PbCrO 4 samples prepared were unstable and tended to become polycrystalline under electron beam irradiation.

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.…”

Catanionic surfactants assisted synthesis of dilead pentaoxochromate nanorods

“…As shown in figure 2a, a typical TEM image of S1 clearly revealed a rod-like morphology with a diameter in the range of 240-970 nm, a length in the range of 6.9-17 µm. Typical morphologies of the Pb 2 CrO 5 products in [14] were rods with lengths of about 2 to 13 µm and diameters of about 500 nm. In comparison with [14], the products here had a wide range of lengths and diameters.…”

“…In the previous work, some methods have been employed to synthesize PbCrO 4 nanorods [13,14], but there has been scarcely study on the synthesis of Pb 2 CrO 5 nanorods [14] until now. As is well known, the properties of nanomaterials are highly size-and shape-dependent [15].…”

The Design of Nanoscale Inorganic Materials with Controlled Size and Morphology by Ionic Liquids

“…Lately, by combining the advantages of both room temperature ionic liquids and microwave heating, a new microwave-assisted ionic liquid method has developed for fast controlled synthesis of nanorods and nanowires of Te and ZnO (Jiang & Zhu, 2005). Zhu and coworkers ) synthesized single-crystal tellurium nanowires using microwave heating in n-butylpyridinium tetrafluoroborate ionic liquid in the presence of polymer surfactant of poly (vinylpyrrolidone) (Wang & Zhu, 2005, Jiang et al, 2006, Singh et al, 2008, Liu et al, 2006. Single-crystalline Bi 2 S 3 and Sb 2 S 3 nanorods have been synthesized using the microwaveassisted ionic liquid method by Jiang and Zhu (Jiang & Zhu, 2005 The morphologies of the samples were investigated by transmission electron microscopy (TEM).…”

“…So far only a handful of studies have reported on the fabrications of nano-or micro-scaled materials including particles of metal oxide (Ding et al, 2007, Bühler & Fledmann, 2006 and sulfide , Jiang & Zhu, 2005. Many metal nanoparticles (NPs) such as Ir (Bühler & Fledmann, 2006), Rh (Wang & Zhu, 2005), Ru , Te (Jiang &. Zhu, 2005), Al (Mu, et al, 2004), Ag , Pt (Foneca et al, 2003), and Au (Dupont et al, 2002) have been prepared in the presence of ionic liquids.…”