Synthesis of Star-Shaped Lead Sulfide (PbS) Nanomaterials and theirs Gas-Sensing Properties

Abstract

Star-shaped PbS nanomaterials are synthesized by a hydrothermal method. Morphology and structure of the PbS nanomaterials are analyzed by SEM, HRTEM and XRD. Gas-sensing properties of the as-prepared PbS sensor are also systematically investigated. The results show star-shaped PbS nanostructure consists of four symmetric arms in the same plane and demonstrate good crystallinity. With the increase of ethanol concentration, the sensitivity of the PbS sensor significantly increases and demonstrates an almost linear relationship at the optimal operating temperature of 400 o C. Moreover, the fast response-recovery towards ethanol is also observed, which indicates its great potential on ethanol detection.

A solution-based ALD route towards (CH3NH3)(PbI3) perovskite via lead sulfide films

“…6) indicate a very well-dened polycrystalline PbS cubic structure (Crystallography Open Database entry 9000001). 28,36,37 PbSO 4 appears upon storage in air (three weeks, red curve), in agreement with the XPS results. 38 Annealing to 300 C does not improve the crystallinity signicantly (orange curve).…”

Lead ethyl dithiocarbamates: efficient single-source precursors to PbS nanocubes

“…PbS can be size-tuned to absorb strongly over a wide range of wavelength on the electromagnetic spectrum thereby shifting its absorption edge into the near infrared region [33]. PbS has widely been used in several opto-electronic devices which include photovoltaic cells [34], sensors [35], thermoelectrics [36], photodetectors [37], diodes [38], catalyst [39], photoconductors [40] and solar concentrators [41]. We have previously reported the syntheses of PbS nanoparticles and thin films using xanthates as precursors [6,21].…”

Star-shaped colloidal PbS nanocrystals: structural evolution and growth mechanism

“…22 Nevertheless, these branched structures possess a high surface area, porosity, mechanical strength and exposed margins, making them favored candidates as active sites in electro-catalysis, 23 sensitizers in solar cells 24 and sensing applications. 25,26 However, only limited procedures have been proposed for the growth of the IV-VI branched nanostructures compared to the lower dimension counterparts (0D, 12,27,28 1D 19,29 and 2D 17,30 ). In 2002, the Cheon group 31 rst introduced a method for obtaining PbS nanostars (NSs) that involved a high injection temperature of 230 C. In 2006, Zhao and Qi 32 advanced the procedure, producing highly uniform PbS NSs at a low temperature of 80 C in an aqueous solvent of mixed cationic/anionic surfactants.…”