Formation and XPS characterization of small lead sulfide clusters

Effective Removal of Heavy Metal Ions from Industrial Wastes Using Thiosalicylhydrazide-Modified Magnetic Nanoparticles

“…57 As depicted in Figure 12b, the binding energy of the S 2p 3/2 peak is 161.8 eV, consistent with the sulfur atoms bound to the metal atoms. 57,58 The above results show that heavy metal ions can be adsorbed on the surface of the Fe 3 O 4 @PAA@ TSH particles via complexation reactions (chemisorption).…”

Growth kinetics determine the polydispersity and size of PbS and PbSe nanocrystals

“…S5 † ). 45 Interestingly, this higher energy feature is absent if aliquots are not immediately quenched in an acetone-dry ice bath. We hypothesize that molecular PbS solutes present at the reaction temperature assemble into clusters with an absorbance feature at 475 nm upon rapid cooling.…”

“…Immediate freezing of aliquots causes a feature to appear in the absorption spectrum ( λ ∼475 nm) that is assigned to PbS solutes (see below). 45 Each aliquot is weighed and diluted with a known amount of tetrachloroethylene (3 mL) prior to recording a UV-Vis-NIR absorption spectrum. A background spectrum was recorded from a known mass of hexadecane and diphenyl ether diluted in tetrachloroethane.…”

Role of Solvent Dielectric Properties on Charge Transfer from PbS Nanocrystals to Molecules

“…25,26 Primarily mono-and bidentate thiol ligand molecules have been used to develop photovoltaic and photodetector devices based on lead-salt NCs. [27][28][29][30] To satisfy the second requirement, molecules with a long alkyl chain are required.…”

“…To satisfy the third requirement, the thiol (SH−) group was chosen as a binding functional group because it is known to bind strongly with the Pb ion of the NCs. , Primarily mono- and bidentate thiol ligand molecules have been used to develop photovoltaic and photodetector devices based on lead-salt NCs. − To satisfy the second requirement, molecules with a long alkyl chain are required. Toward this end, 10-dodecylanthracene-9-thiol (DAT) was newly synthesized (see the Supporting Information for the detailed synthesis procedure).…”