Synthesis of Gold Nanoparticle‐Embedded Silver Cubic Mesh Nanostructures Using AgCl Nanocubes for Plasmonic Photocatalysis

Abstract

A novel room-temperature aqueous synthesis for gold nanoparticle-embedded silver cubic mesh nanostructures using AgCl templates via a template-assisted coreduction method is developed. The cubic AgCl templates are coreduced in the presence of AuCl and Ag , resulting in the reduction of AuCl into gold nanoparticles on the outer region of AgCl templates, followed by the reduction of AgCl and Ag into silver cubic mesh nanostructures. Removal of the template clearly demonstrates the delicately designed silver mesh nanostructures embedded with gold nanoparticles. The synthetic mechanism, structural properties, and surface functionalization are spectroscopically investigated. The plasmonic photocatalysis of the cubic mesh nanostructures for the degradation of organic pollutants and removal of highly toxic metal ions is investigated; the photocatalytic activity of the cubic mesh nanostructures is superior to those of conventional TiO catalysts and they are catalytically functional even in natural water, owing to their high surface area and excellent chemical stability. The synthetic development presented in this study can be exploited for the highly elaborate, yet, facile design of nanomaterials with outstanding properties.

Surfactant-free Synthesis of Spiky Hollow Ag–Au Nanostars with Chemically Exposed Surfaces for Enhanced Catalysis and Single-Particle SERS

“…More specifically, the addition of ascorbic acid to the incubated solution leads to the reduction of the AgCl nanoparticles to Ag 0 nanoparticles, as has been previously observed. 46 − 48 However, these are not stable in the presence of Au 3+ cations, which can galvanically reduce them, leading to the replacement of the Ag 0 by Au 0 in the nanocrystal structure, a process that would be expected to yield cubic hollow Au shells. 46 , 47 Simultaneously, the presence of ascorbic acid and Au 3+ cations along with residual Ag + and Cl – leads to growth of spikes on the surface of the particles.…”

Effect of pH and Irradiation Power in the Synthesis of Gold Nanoparticles by using Binahong (Anredera cordifolia) Leaves Extract

“…Synthesis of gold nanoparticles may follow many kinds of mechanism, such as templateassisted synthesis 1,2 , seed-mediated synthesis 3,4 , or high frequency energy-assisted synthesis 5,6 . Even though those mechanisms may yield nanoparticles with controlled morphology, however, those methods require many steps in the preparation and some of them may need high cost 7,8 .…”

Structurally and Compositionally Tunable Absorption Properties of AgCl@AgAu Nanocatalysts for Plasmonic Photocatalytic Degradation of Environmental Pollutants

“…As a result, AgCl nanomaterials with various shapes such as plate, cubic, spherical, and octahedral could be synthesized [5][6][7][8][9][10]. In addition to pure AgCl, composite nanostructures composed of AgCl and noble metals have recently been synthesized [5,6,[11][12][13]. However, most of the composite nanostructures were still compositionally limited to Ag/AgCl, whose sizes and shapes, and corresponding chemical and physical properties, were hardly controlled [14][15][16][17].…”

“…The bottom-up synthesis of noble metal nanostructures is essentially conducted by reducing their metallic precursors. Under such reductive conditions, however, AgCl nanostructures are readily reduced and deformed into metallic Ag debris [5,6,11]. Therefore, the chemically controlled selective reduction of metallic precursors in which AgCl structures are preserved is highly desired for synthesizing noble metal/AgCl composites and controlling their properties.…”