Morphological Studies, Photocatalytic Activity, and Electrochemistry of Platinum Disulfide Nanoparticles from Bis(morpholinyl-4-carbodithioato)-platinum(II)

Abstract

Bis(morpholinyl-4-carbodithioato)-platinum(II) was synthesized and characterized using spectroscopic techniques and single-crystal X-ray crystallography. The Pt(II) complex crystallized in a monoclinic space group P 2 1 / n with a Pt(II) ion located on an inversion center coordinated two morpholinyl dithiocarbamate ligands that are coplanar to form a slightly distorted square planar geometry around the Pt(II) ion. The complex was thermolyzed at 120, 180, and 240 °C to prepare PtS 2 nanoparticles. Powder X-ray diffraction patterns confirmed the hexagonal crystalline phase for the as-prepared PtS 2 nanoparticles irrespective of thermolysis temperature. Bead-like shaped PtS 2 - 120 nanoparticles with a particle size in the range of 12.46–64.97 nm were formed at 120 °C, while PtS 2 - 180 prepared at 180 °C is quasi-spherical in shape with particles in the range of 24.30–46.87 nm. The PtS 2 - 240 obtained at 240 °C is spherical with particles in the range of 11.45–46.85 nm. The broad emission maxima of the as-prepared PtS 2 nanoparticles are ascribed to the particles’ broad size distributions. The photocatalytic degradation of methylene blue by the PtS 2 nanoparticles shows a maximum efficiency of 87% for PtS 2 - 240 after 360 min. The effects of photocatalytic dosage, irradiation time, pH medium, and scavengers were also evaluated. Cyclic voltammetry of the PtS 2 nanoparticles showed a reversible redox reaction, while the electrochemistry of the as-prepared PtS 2 indicates that the electron transfer process is diffusion-controlled.

Boosting Photocatalytic Activity Using Carbon Nitride Based 2D/2D van der Waals Heterojunctions

“…564,565 For example, platinum disulfide (PtS 2 ), a layered material, has displayed high carrier mobility (3500 cm 2 V −1 S −1 ) even larger than that of phosphorene (1000 cm 2 V −1 S −1 ), which makes it suitable for various applications from photocatalysis to fast-moving electronic applications including gas sensors, field-effect transistors (FET), etc. 566 DFT calculation reveals that monolayer PtS 2 567 Due to its layered nature, PtS 2 is an ideal candidate for the fabrication of heterojunction with various semiconductors. For instance, DFT calculation suggests that PtS 2 and arsenene can make a 2D/2D Z-scheme heterojunction due to the epitaxial matching with the only mismatch of less than 2%.…”

“…PtS 2 and PtSe 2 in the forms of nanoparticles and nanosheets can be synthesized via various routes such as high-pressure synthesis, chemical vapor transport, liquid-phase exfoliation, etc. Ajibade et al demonstrated the synthesis of PtS 2 nanoparticles using a bis­(morpholinyl-4-carbodithioato)-platinum­(II) thermalization, which showed a visible light degradation of MB . Due to its layered nature, PtS 2 is an ideal candidate for the fabrication of heterojunction with various semiconductors.…”

Muntingia calabura Leaves Mediated Green Synthesis of CuO Nanorods: Exploiting Phytochemicals for Unique Morphology

“…This might restrict the application of green synthesized CuO NPs as particle size and shape of nanoparticles govern their physicochemical properties, which in turn dictates their functionality. For instance, Ajibade et al compared the photocatalytic properties of platinum disulfide nanoparticles in different morphologies such as bead-shape, quasi-spherical and spherical [26]. It was evident that the shape of the nanoparticles affected effective surface area, porosity, and band gap of the material which in turn influenced its efficiency in photocatalytic degradation of dye molecules.…”

Bis(4-methylpiperidine-1-carbodithioato)-lead(II) and Bis(4-benzylpiperidine-1-carbodithioato)-lead(II) as Precursors for Lead Sulphide Nano Photocatalysts for the Degradation of Rhodamine B

“…The v(–NCS 2 ) frequency observed at 1468 cm −1 and 1469 cm −1 in the 4-methylpiperidine dithiocarbamate ( Mpipdtc) and 4-benzylpiperidine dithiocarbamate (Bpipdtc) ligands shifted to 1429 cm −1 and 1478 cm −1 in [Pb(4-mpipdtc) 2 ] and [Pb(4-Bpipdtct) 2 ] complexes. This band lies between the C-N single bond and double bond characters and confirmed bonding of the dithiocarbamato anions to the Pb(II) ions [ 26 , 27 ]. The free ligands spectra showed single sharp bands due to ν(C−S) at 946 cm −1 for 4-methylpiperidine dithiocarbamate and 945 cm −1 for 4-benzylpiperidine dithiocarbamate.…”