Facile Synthesis of Highly Efficient One-Dimensional Plasmonic Photocatalysts through Ag@Cu₂O Core–Shell Heteronanowires

Abstract

A novel class of one-dimensional (1D) plasmonic Ag@Cu2O core-shell heteronanowires have been synthesized at room temperature for photocatalysis application. The morphology, size, crystal structure and composition of the products were investigated by XRD, SEM, TEM, XPS, and UV-vis instruments. It was found the reaction time and the amount of Ag nanowires play crucial roles in the formation of well-defined 1D Ag@Gu(2)O core-shell heteronanowires. The resultant 1D Ag@Cu2O NWs exhibit much higher photocatalytic activity toward degradation of organic contaminants than Ag@Cu2O core-shell nanopartides or pure Cu2O nanospheres under solar light irradiation. The drastic enhancement in photocatalytic activity could be attributed to the surface plasmon resonance and the electron sink effect of the Ag NW cores, and the unique 1D core-shell nanostructure.

Ambient Facile Synthesis of Gram-Scale Copper Selenide Nanostructures from Commercial Copper and Selenium Powder

“…The ratio of Cu + /Cu 2+ increases from 6.8 to 8.3 after the treatment with hydrazine due to the reduction capability of hydrazine. [45][46][47] The spectra of Se 3d in both samples suggest the existence of Se 2-at 53.8 eV [ Figure 3 Previous reports on the preparation of high crystalline metal chalcogenides, such as CuSe made from copper and selenium in pure 2-mercaptoethanol, 49 and Bi 2 S 3 nanorods prepared from bismuth(III) monosalicylate in the presence of thioglycolic acid, demonstrates that the key role of -SH group is to provide S 2-or dissolve selenium to form highly reactive selenothiolate. [50][51][52][53] Theoretical calculations show that the reaction between copper and reactive selenothiolate (e.g., HOCH 2 CH 2 SSe -) is spontaneous.…”

Ambient synthesis of a multifunctional 1D/2D hierarchical Ag–Ag2S nanowire/nanosheet heterostructure with diverse applications

“…13 In a typical synthesis, 25 mL vial, and heated with magnetic stirring in an oil bath at 135°C for 1 h. 1 mL of NaCl in 1,2-propanediol solution (1 mM) was then quickly added, and stirred for another 5 min. Finally, AgNO 3 (0.1 M solution in 1,2-propanediol) was added to the mixture.…”

Effects of nanostructure on clean energy: big solutions gained from small features

“…/NH 3 into NO 3 -and a trace of NO 2 -in an alkaline solution under fluorescent light irradiation, and the transfer of photogenerated holes could play a crucial role in the photocatalytic oxidation process of the ammonia [40]. Our group [41] also prepared a novel class of onedimensional (1D) plasmonic Ag@Cu 2 O core-shell heteronanowires by a facile solution process at room temperature, which exhibited much higher photocatalytic activity towards degradation of organic contaminants than Ag@Cu 2 O core-shell nanoparticles or pure Cu 2 O nanospheres under solar light irradiation. The drastic enhancement in photocatalytic activity could be attributed to the surface plasmon resonance, the electron sink effect of the Ag nanowire cores, and the unique 1D core-shell nanostructure.…”