Facile synthesis of aqueous-dispersed luminescent nanosheets from non-layered lanthanum hexaboride

Abstract

Nanosheets were synthesised by incorporating probe sonication and grinding of an aqueous dispersion of non-layered lanthanam hexaboride.

Liquid‐Phase Exfoliation of Nonlayered Non‐Van‐Der‐Waals Crystals into Nanoplatelets

“…This result was followed by the successful LPE of various other nonlayered strongly bonded crystals [ 68–86 ] into nanoplatelets: β‐boron, [ 86–90 ] α‐Fe 2 O 3 , [ 68 ] MnTe, [ 71 ] Si, [ 73,78 ] PbS, [ 75 ] FeS 2 , [ 79,81,82 ] α‐Ge, [ 77,84,91 ] Sn, [ 83 ] B 4 C, [ 85 ] etc. These developments have raised many questions regarding the mechanism of the LPE process and the properties of the nonlayered 3D‐strongly bonded materials which allow exfoliation by LPE by using them directly as starting materials.…”

“…Although 2D-nonlayered nanoplatelets have been synthesized in the past by using different chemical routes, [66,67] but this direct LPE using a nonlayered 3D-compound as a starting material is surprising. This result was followed by the successful LPE of various other nonlayered strongly bonded crystals [68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86] into nanoplatelets: β-boron, [86][87][88][89][90] α-Fe 2 O 3 , [68] MnTe, [71] Si, [73,78] PbS, [75] FeS 2 , [79,81,82] α-Ge, [77,84,91] Sn, [83] B 4 C, [85] etc. These developments have raised many questions regarding the mechanism of the LPE process and the properties of the nonlayered 3D-strongly bonded materials which allow exfoliation by LPE by using them directly as starting materials.…”

Ultrathin 2D silver sulphate nanosheets for visible-light-driven NO2 sensing at room temperature

“…[11][12][13] Up to now, a variety of non-layered materials have been synthesized successfully in the 2D ultrathin form, including noble metals (such as Au, Ag, and Pd), metal oxides (such as TiO 2 , In 2 O 3 , and WO 3 ), and metal sulphides (such as PdS, CuS, CdS, and In 2 S 3 ) utilizing diverse exfoliation techniques ranging from novel methods to facile and environmentally friendly exfoliation techniques. [14][15][16][17][18][19][20][21][22] In particular, silver sulphide (Ag 2 S) has stimulated enormous interest due to its potential applications in photoconductors, photovoltaics, and gas-sensing applications owing to its intrinsic electrical and electronics properties. 19,[23][24][25] Using wet chemical exfoliation, recent work has successfully exfoliated 2D Ag 2 S nanosheets from their bulk counterpart, exhibiting small lateral dimensions and a thickness of B40 nm, a narrow bandgap of 1.51 eV, and excellent optical properties.…”

Facile route for synthesis of strontium hexaborate crystalline powders

“…As the time–temperature profile of the heat treatment process has a high impact on the particle size, morphology, and crystallinity of the synthesized sample, it will be a critical factor in the synthesis of single‐phase borate compound 16 . Therefore, the preparation of nanostructured strontium borates with controlled size and morphology has attracted high interest 17,18 . Zeng et al 19,20 .…”

“…16 Therefore, the preparation of nanostructured strontium borates with controlled size and morphology has attracted high interest. 17,18 Zeng et al 19,20 developed a high-temperature solid-state reaction to reduce the trivalent lanthanide ions impurities to divalent ions without using a reducing agent, such as H 2 , CO, and C, applicable for the B 2 O 3 -rich strontium borates (SrB 4 O 7 and SrB 6 O 10 ). The high-temperature solid-state reaction has also been used by others.…”