PbS nanostructures synthesized via surfactant assisted mechanochemical route

Abstract

PbS nanocrystals using surfactant assisted mechanochemical route has been successfully prepared. The methods of XRD, SEM, surface area and particle size measurements were used for nanocrystals characterization. The XRD patterns confirmed the presence of galena PbS (JCPDS 5-592) whatever treatment conditions were applied. The strong observable peaks indicate the highly crystalline nature in formation of PbS nanostructures where preferential crystal growth in the (200) direction after chelating agent (EDTANa 2 •2H 2 O) addition has been observed. The mean volume weighted crystallite size 4.9 nm and 35 nm has been calculated from XRD data using Williamson-Hall method for PbS synthesized without and/or with chelating agent, respectively corresponding with surface weighted crystallites sizes of 2.9 and 18.8 nm. The sample prepared without surfactant yields the smaller crystallites and the higher microstrain compared with surfactant assisted synthesis. The obtained results illustrate a possibility to manipulate crystal morphology by combining effect of milling and surfactant application.© Versita Warsaw and Springer-Verlag Berlin Heidelberg.

Hallmarks of mechanochemistry: from nanoparticles to technology

“…358,359 The XRD patterns confirmed the presence of galena PbS ( JCPDS 5-592) whatever treatment conditions were applied. The strong observable peaks in XRD patterns indicate the highly crystalline nature in formation of PbS nanostructures.…”

Review of Metal Sulfide Nanostructures and their Applications

“…PbS is a luminescent material with cubic structure and has novel optical properties. 400 In bulk form, PbS has a NIR region based direct narrow band gap energy of 0.41 eV at room temperature which can be widened to a visible region of ∼2 eV by forming nanoclusters. 401 Various morphologies of PbS like NPs, 402 microflower, 403 thin-film, 404 NSs, 405 QDs, 406 and NRs 407 have been reported according to different techniques.…”

“…PbS is a luminescent material with cubic structure and has novel optical properties . In bulk form, PbS has a NIR region based direct narrow band gap energy of 0.41 eV at room temperature which can be widened to a visible region of ∼2 eV by forming nanoclusters .…”

The dual role of sulfur-containing amino acids in the synthesis of IV–VI semiconductor nanocrystals: a mechanochemical approach

“…It has been reported that the band gap of PbS can be widened to the visible range by forming nanoclusters. [14][15][16][17][18][19] Quite recently, the mechanochemical synthesis starting from eggshell membrane and lead acetate was used for the preparation of PbS nanocrystals. 7 To date, many synthetic methods have been reported for the preparation of PbS nanoparticles of various morphologies, such as hollow spheres, 8 wires, 9 rods, 10 tubes, 11 cubes 12 and star-like structures.…”

“…E-mail: balaz@ saske.sk; balazm@saske.sk; zorkovska@saske.sk; Fax: +421557922604; Tel: +421557922603 state high-energy milling are governed by the mechanochemical methodology. [14][15][16][17][18][19] Quite recently, the mechanochemical synthesis starting from eggshell membrane and lead acetate was used for the preparation of PbS nanocrystals. 20 The reactions occur at the interfaces of the nanometer-sized grains, which are continuously regenerated during milling.…”