Room Temperature Synthesis of Aminocaproic Acid-Capped Lead Sulphide Nanoparticles

Abstract

Aminocaproic acid (ACA) mixed methanolic lead acetate-thiourea (PbAc-TU) complex as precursor for fabrication of lead sulphide (PbS) nanoparticles (NPs) has been explained. The size, structure and morphology of as-prepared ACAcapped PbS NPs were systematically characterized by scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), Uv-vis spectroscopy and Brunauer-Emmett-Teller (BET) techniques. The obtained results show that the synthesized PbS NPs are nanocrystalline, size quantized and their agglomeration shows a mesoporous network of 8.7 nm in pore size. The binding nature of ACA molecules on PbS surface was studied by thermo gravimetric analysis (TGA), Fourier transform infrared (FTIR) and X-ray photoelectron (XPS) techniques. Results indicate that ACA acts as a soft template that restricts the growth of PbS NPs through its binding to Pb surface via nitrogen lone pair.

Antibacterial Activity of Intracellular Greenly Fabricated Selenium Nanoparticle of Lactobacillus pentosus ADET MW861694 against Selected Food Pathogens

“…The presence of C-H, C=C, and C-O functional groups is similar to the report of Ananth, Keerthika, and Rajan (2019). The characteristic C-C and C-N functional group which indicates the presence of proteins correspond with the report of Jyoti, Baunthiyal, and Singh (2016) and Patel, Mighri, and Ajji (2012).…”

Charge Transport in Trap-Sensitized Infrared PbS Quantum-Dot-Based Photoconductors: Pros and Cons

“…Since ligands set the potential barrier for charge-carrier transfer and transport in QD solids, long insulating ligands must be replaced with shorter ones in order to enhance the coupling between QDs while still maintaining the carrier quantum confinement and efficiently passivating their surface [ 8 , 16 , 17 ]. Several ligand-exchange strategies were reported for lead-chalcogenide QDs, both in solution and in solid state, using bidentate thiols [ 18 ], primary amines [ 19 ], carboxylic acids [ 20 ], thiocyanate ions [ 21 ], and halide ions [ 2 ]. Each one of these ligands has different chemical properties and selective affinity for the nanocrystal facets, bringing distinctive behavior of the charge-carrier dynamics in the QD solids [ 22 ].…”

Lead Sulfide Nanocubes for Solar Energy Storage

“…Moreover, very similar XRD patterns were obtained regardless the reaction conditions (see Supporting Information, Figure S7). The absence of secondary phases, such as PbO, PbO2, PbSO3, PbSO4 or residual reagents, confers significant advantages to the present synthetic route, since conversely to other reported methods, where N2, Ar or vacuum conditions are needed, [17,38] atmosphere control is not required here. TEM images confirmed the description from SEM evaluation (Figure 1).…”

“…Lead sulfide is a binary IV-VI semiconductor material, with small direct bandgap (0.41 eV) and large exciton Bohr radius of 18 nm, compared to many semiconductors. This material has been successfully used for different applications such as infrared sensors, [13] solar cells, [14] light emitting diodes, [15] nanoscale lasers, [16] photonic and optical switches, [17] and biological imaging [18] due to its controllable size and morphology.…”