Synthesis of ultra-long hollow chalcogenide nanofibers

Abstract

Electrospinning and galvanic displacement reaction are combined to fabricate ultra-long hollow chalcogen and chalcogenide nanofibers in a cost-effective and high throughput manner. This procedure exploits electrospinning to fabricate ultra-long sacrificial nanofibers with controlled dimensions and morphology, thereby imparting control over the composition and shape of the nanostructures evolved during galvanic displacement reaction. It is believed to be a general route to form various ultra-long hollow semiconducting nanofibers.

Electrospun Nanofibers: From Rational Design, Fabrication to Electrochemical Sensing Applications

“…Additionally, nanofibers with hollow interior could be prepared by using electrospun nanofibers as sacrificial templates without post-treatment process. For example, Te and Bi x Te 1-x hollow nanofibers were directly synthesized by galvanic displacement reaction of electrospun Ni nanofibers at room temperature [119]. In general, additional coating and etching steps are required in these template methods, and the quality of the resultant tubes is strongly dependent on the control of each step.…”

Simple electrochemical synthesis of ultra-long silver telluride nanotubes

“…20,21 However, these hydrothermally produced metal telluride nanotubes were reported to have relatively short lengths up to several micrometers and wide size distributions. In comparison with our previous work on bismuth telluride (Bi 2 Te 3 ) nanotubes prepared through a combinational route of electrospinning of sacrificial Ni metal and its galvanic displacement, 15 the diameters and size distributions of nanotubes fabricated in this work could be notably reduced and improved. The electrochemical transformation into the nanotubes was further investigated by a TEM technique.…”

“…To this end, we previously reported a two-step synthetic method for the ultra-long 1D telluride nanostructures from the hollow nanofibers to the hierarchical nanotubes using a combination of electro-spinning process for the sacrificial nickel (Ni) nanofibers and the following galvanic displacement of Ni nanofibers. [14][15][16][17] In this work, we report the simpler and more facile electrochemical synthesis of ultra-long Ag 2 Te hollow nanotubes, which could be directly transformed from the electro-spun Ag nanofibers without the conventional step of the sacrificial Ni nanofibers. The electrodepostion of tellurium (Te) on the surface of Ag nanofibers induced the chemical transformation into the Ag 2 Te nanotubes with the ultra-long lengths spanning over the substrate.…”

“…The Te atoms reduced from Te 4+ ions are envisaged to nucleate and grow on the surfaces of Ag nanofibers in the forms of thin layers or porous sheath. 15 In parallel with the deposition of Te layers, the Ag atoms from the nanofibers diffuse into the layers of Te and chemically transform into the monoclinic Ag 2 Te structure. Through this electrochemical reaction, the core Ag nanofibers are sourced and exhausted for the chemical transformation and finally produce the hollow nanotubes.…”

Nanoarchitectured Design of Porous Materials and Nanocomposites from Metal‐Organic Frameworks

“…Gas‐phase methods such as spray pyrolysis, chemical vapor deposition (CVD) are often used to deposit thin films of metal chalcogenides on glass substrates . To date, many liquid‐phase methods have been used for the preparation of metal chalcogenide nanostructures including the liquid‐phase exfoliation method, hot injection method, single source precursor method, hydrothermal method, solvothermal method, microwave method, sonochemical method, electrodeposition method, electrospinning method, photochemical method, cation exchange method, Kirkendall effect induced method, and template‐directed method . In recent times, MOFs have been shown to be suitable precursors for the preparation of metal chalcogenide nanostructures, particularly for metal sulfides and metal selenides, usually with the assistance of S‐ and Se‐containing compounds.…”