Mesoporous Gold Nanostructures: Synthesis and Beyond

Abstract

Mesoporous metal nanostructures have offered multiple advantages that cannot be realized elsewhere. These materials have been attracting more research attention in catalysis and electrocatalysis owing to their functional structures and compositions. Of the various mesoporous metals available, mesoporous gold (mesoAu) nanostructures are of special interest in surface-enhanced Raman scattering (SERS) and related applications because of their strong electromagnetic field (localized surface plasmon resonance). In the last few decades, various synthesis strategies have been developed to prepare mesoAu nanostructures with controllable morphologies that exhibit fascinating physicochemical properties and increase applications in SERS, catalysis, and electrocatalysis. In this Perspective, we systematically summarize recent advances in synthesis and applications of mesoAu nanostructures. Four synthesis strategies, including dealloying, nanocasting, electrochemical deposition, and intermediate template, are discussed in detail. Moreover, physicochemical properties and promising applications of mesoAu nanostructures are presented. Finally, we describe current challenges and give a general outlook to explore further directions in synthesis and applications of mesoAu nanostructures.

Rational Design of Near‐infrared II Plasmonic Optofunctional Materials for Diagnostic and Therapeutic Applications

“…[92] Moreover, mesoporous Au nanostructures have also emerged as a new type of NIR-II plasmonic nanostructures for phototheranostics with large specific surface area, pore volume, adjustable pore size and structure, and diversity of frameworks. [93,94] Wang et al reported a type of Au nanoframeworks (AuNFs) for PA/SERS dual imaging-guided NIR-II photothermal therapy and chemotherapy (Figure 6D). [95] In their work, biocompatible liposomes were used as the templates to guide the formation of AuNFs with large mesopores.…”

Two-dimensional mesoporous metals: a new era for designing functional electrocatalysts

“…[17][18][19][20][21][22][23][24][25] On the one hand, concave/convex mesochannels enlarge the utilization efficiency of metals and produce abundant undercoordinated high-index metal sites, which thus enhances their (electro)catalytic activity. [26][27][28][29][30][31][32][33][34][35][36] Meanwhile, continuous metal frameworks accelerate the transport of electrons and reactants and inhibit the physical Ostwald ripening process, which increases the (electro)catalytic activity and synergistically enhances the stability. [37][38][39][40][41] On the other hand, mesoporous metals provide a remarkable nanoconnement environment that enriches the reaction intermediates within mesopores and optimizes their (electro)catalytic selectivity.…”