Synthesis and photocatalytic property of gold nanoparticles by using a series of bolaform Schiff base amphiphiles

摘要

Gold nanoparticles were synthesized via a series of bolaform amphiphites with hydrophilic ethyleneamine spacers and aromatic headgroups at a liquid-liquid interface. By stirring the aqueous solution containing AuCl_4- ions with the chloroform solution of bolaform amphiphile, AuCl_4- ions were transferred into the organic phase and reduced to gold nanoparticles. Spectral and morphological measurements indicated that these bolaform amphiphiles could serve as both capping and reducing agents. Different gold nanostructures could be obtained depending on the different spacers, headgroups of bolaform amphiphiles and the molar ratios of amphiphile to AuCl_4- ions. The photocatalytic properties of as-made gold nanoparticles on the degradation of methyl orange indicated that the substituted groups and molecular structures in the amphiphiles indeed played an important role in changing the sizes of as-made gold nanoparticles and subsequently regulating their catalytic behaviors. The present work gave an original investigation of synthesis and regulation of gold nanostructures by utilizing bolaform amphiphiles with different substituted headgroups and spacers.