Photochemical removal of acetaldehyde using 172 nm vacuum ultraviolet excimer lamp in N or air at atmospheric pressure.

The photochemical removal of acetaldehyde was studied in N or air (O 1-20%) at atmospheric pressure using side-on and head-on types of 172 nm Xe excimer lamps. When CHCHO was decomposed in N using the head-on lamp (HL), CH, CO, and CO were observed as products in FTIR spectra. The initial removal rate of CHCHO in N was ascertained as 0.

Efficient removal of benzene in air at atmospheric pressure using a side-on type 172 nm Xe excimer lamp.

The photochemical removal of benzene was studied in air at atmospheric pressure using a side-on type 172 nm Xe excimer lamp with a wide irradiation area. After 1.5 min photoirradiation, CH (1000 ppm) in air was completely converted to HCOOH, CO, and CO at a total flow rate of 1000 mL/min.

Rapid spontaneous alloying between Pd nanocubes and Ag nanoparticles in aqueous solution at ambient temperature.

Rapid spontaneous alloying between Pd nanocubes and spherical or triangular Ag nanoparticles was studied in an aqueous solution at ambient temperature using transmission electron microscopy (TEM), TEM-energy-dispersed X-ray spectroscopy (EDS), XRD, and UV-Vis spectroscopy of product particles. The results show that alloying occurs between Ag particles and Pd cubes and finishes within a few seconds, preserving the cubic shape with maximum Ag content of approximately 22%.

Rapid transformation from spherical nanoparticles, nanorods, cubes, or bipyramids to triangular prisms of silver with PVP, citrate, and H2O2.

Rapid sphere-to-prism (STP) transformation of silver was studied in aqueous AgNO(3)/NaBH(4)/polyvinylpyrrolidone (PVP)/trisodium citrate (Na(3)CA)/H(2)O(2) solutions by monitoring time-dependent surface plasmon resonance (SPR) bands in the UV-vis region, by examining transmission electron microscopic (TEM) images, and by analyzing emitted gases during fast reaction. Roles of PVP, Na(3)CA, and H(2)O(2) were studied without addition of a reagent, with different timing of each reagent's addition, and with addition of H(2)O(2) to mixtures of spheres and prisms. Results show that prisms can be prepared without addition of PVP, although it is useful to synthesize smaller monodispersed prisms.