Microwave‐Assisted Synthesis of Porous Ag₂S–Ag Hybrid Nanotubes with High Visible‐Light Photocatalytic Activity

Abstract

Alles andere als lichtscheu: Ag2S‐Ag‐Hybridnanoröhren wurden durch schnelle mikrowellenvermittelte Sulfidierung von Ag2CO3‐Nanostäben synthetisiert. Das Ag2S/Ag‐Verhältnis lässt sich über die Konzentration der Schwefelquelle leicht einstellen. Eine optimierte Ag2S‐Ag‐Hybridstruktur war beim Abbau von Methylorange (gelb im Diagramm) und bei der Reduktion von CrVI in Wasser unter Bestrahlung mit sichtbarem Licht hervorragend photokatalytisch aktiv.

In Situ Dissolution–Diffusion toward Homogeneous Multiphase Ag/Ag2S@ZnS Core–Shell Heterostructures for Enhanced Photocatalytic Performance

“…6,44−46 Previously, hybrid Ag/ Ag 2 S materials have been investigated for photocatalytic studies. 11,47 In this study, proof-of-concept of the multiphase hybrid Ag/Ag 2 S@ZnS as UV to visible light responsive photocatalyst for enhanced solar H 2 production is demonstrated ( Figure 9b). As expected, no H 2 is generated for the control samples ZnS and pure Ag and Ag 2 S nanocubes, which confirms that they are not suitable for H 2 production under visible light.…”

Hollow spheric Ag–Ag2S/TiO2 composite and its application for photocatalytic reduction of Cr(VI)

“…For instance, TiO 2 /Ag nanosponge composite presents much higher reactivity than that of TiO 2 for the degradation of salicylic acid under UV light irradiation [17]; hybrid structure of Ag 2 S-noble metals exhibits improved electrocatalytic activities due to the energy level alignment [18]. Further, recently reported literatures reveal that Ag-Ag 2 S nanohybrids show tunable and enhanced photoelectric/photocatalytic properties [19][20][21][22][23].…”

“…Considering that hollow micro/nanostructures with excellent structural stability have notable advantages in various fields (nanoreactors, drug delivery, gas sensors, and energy storage & conversion) [19,24], a well-defined Ag-Ag 2 S hollow microsphere combined with nano-TiO 2 (Ag-Ag 2 S/TiO 2 ) was prepared with a facile and rational in-situ chemical transformation method in this work. The as-prepared hollow spheric Ag-Ag 2 S/TiO 2 nanocomposites exhibited highly improved catalytic efficiency under both UV and visible light irradiations.…”

Interconnected porous hollow CuS microspheres derived from metal-organic frameworks for efficient adsorption and electrochemical biosensing

“…Among the present available methods, the sacrificial template route is regarded as a versatile strategy to realize hollow structures due to the effective operability, good reproducibility and simplicity. Especially, rational utilization of different principles including the Kirkendall effect [4,5], Ostwald ripening [6,7], galvanic replacement [8,9], chemical etching [10,11], and ionic exchange [12,13] to combine with sacrificial template facilitates the formation of hollow structures in diverse functional materials. Notwithstanding these advances, there is still a great challenge to exploit a facile and reliable strategy for simultaneously achieving the interior hollowing and shell pore creation.…”