Conversion of layered materials to ultrathin amorphous nanosheets induced by ball-milling insertion and pure-water exfoliation

Abstract

A simple and universal two-step strategy, “ball-milling insertion and pure-water exfoliation”, to efficiently produce high quality ultrathin amorphous 2D nanosheets.

Molybdenum disulfide, exfoliation methods and applications to photocatalysis: a review

“…Cathodic exfoliation is typically performed in organic solvents such as dimethyl sulfoxide (DMSO). 18–64 El Garah et al presented a rapid (<1 hour) electrochemical exfoliation method for molybdenum disulfide (MoS 2 ) using lithium-ion intercalation, with a lithium chloride solution in DMSO as the electrolyte. Their results pave the way for a rapid and ambient condition preparation of MoS 2 nanoflakes with an average lateral size of about 0.8 μm, suitable for low-cost electronic (optoelectronic) devices.…”

“…They also demonstrated that this method enabled the production of a series of amorphous 2D nano-materials with heterostructures composed of two or more components and multiple interfaces, with a yield of up to 97.5%. 20 Liu and Kumatsu proposed a simple and effective alternative to produce MoS 2 and WS 2 nanoflakes using sodium cholate as a surfactant during the milling process to facilitate exfoliation and dispersion of the nanoflakes in water. They showed that the exfoliated sample can be stored as a “solid stock” and easily dispersed in water by manual agitation, resulting in highly concentrated dispersions of MoS 2 and WS 2 nanoflakes with yields reaching 93% and 57%, respectively, after centrifugation.…”

“…This variety of forms can be controlled by choosing appropriate synthesis routes with optimized operational parameters. 17–33…”

“…This variety of forms can be controlled by choosing appropriate synthesis routes with optimized operational parameters. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] In fact, when changing the measurement scale, the properties or behavior of materials also change. Thus, individual layers of MoS 2 have radically different properties compared to bulk materials.…”