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Tl2S thin films were fabricated via the AACVD route at three different temperatures and linear sweep voltammetry results.

The advancement of anticancer medications has progressed considerably over the years, fueled by the pressing necessity to tackle the intricate issues and difficulties related to cancer therapy. Cancer continues to be a significant cause of death globally, highlighting the need for ongoing research into effective treatment options. While considering the need for an effective treatment, microcrystalline cellulose (MCC) was modified to create amino cellulose (AC) derivatives, including 6-deoxy-6-hydrazide cellulose (C-Hyd), 6-deoxy-6-(N,N-diethyl)amine cellulose (C-DEA), and 6-deoxy-6-diethyltriamine cellulose (C-DETA). AC derivatives were used as supporting material for developing MoS2 nanocomposite for cancer therapeutics. Characterization using FTIR and 1H-NMR spectroscopy confirmed NH moieties and MoS2 adsorption, while XRD and SEM–EDS analyses verified the crystalline structure and morphology. MoS2 NF loading, swelling, and degradation rate of AC-MoS2 nanocomposites have been investigated. AC-MoS2 nanocomposites were analyzed against NIH3T3, B16F10, MDA-MB-231, and MCF-7 cell lines, using presto blue and LIVE/DEAD staining. Cell viability assay and fluorescence microscopy against four cell lines revealed that all AC-MoS2 nanocomposites with 5 wt% MoS2 exhibited selective cytotoxicity for cancer cell lines compared to fibroblast cell lines. Our findings indicated that amino cellulose derivatives loaded with MoS2 could be efficient candidates for skin and breast cancer therapy. [ABSTRACT FROM AUTHOR]

The superior kinetics of charge carriers and greater visible light absorption are important factors for enhancing photoelectrochemical performance. Herein, the core–shell heterostructure has been developed by encapsulating single-phase MnZnO3 over TiO2 nanotubes by aerosol-assisted chemical vapor deposition approach. The fabricated photoanodes have been characterized by employing various techniques including X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, atomic force microscopy, and photoluminescence. Moreover, the mechanism for electron/hole transfer has been focused by a brief electrochemical investigation. The bilayer 1D/2D TiO2@MnZnO3 photoanode exhibited higher current density (2 mA cm−2) as compared to pristine TiO2-nanotubes (0.174 mA cm−2) at 1.52 V vs RHE. The superior photoactivity of heterostructure is attributed to the rapid transfer of photogenerated charge carriers via the Type-II mechanism. Furthermore, the reduced band gap (2.05 eV) accounts for good absorption in the visible region of light, while the interfacial electric field allowed the improved charge separation. The synergistic strategy in the present work demonstrates the promising significance of a heterojunction interface to optimize photovoltaic devices. [ABSTRACT FROM AUTHOR]

Dithiocarbamate complexes [Cd(S2CNCy2)2(py)] (1), [In(S2CNCy2)3]·2py (2) and [Zn(S2CNCy2)2(py)] (3) were synthesized and toluene solution of (1) and (2) was used as dual source precursor for the synthesis of CdIn2S4 (CIS), while that of (1) and (3) was applied for the deposition of Cd7.23Zn2.77S10–ZnS composite (CZS-ZS) thin film photoan-odes by employing single step aerosol assisted chemical vapor deposition (AACVD) technique. Deposition experiments were performed at 500°C under an inert ambient of argon gas. The structural properties of deposited films were evaluated by using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The field emission scanning electron microscopy (FESEM) exposed surface morphologies while UV-Visible spectrophotometry revealed that CIS is low band gap photoanode in comparison to CZS-ZS. The comparison of photoelectrochemical (PEC) responses measured in identical conditions in terms of linear sweep voltammetry (LSV) depicts photocurrent density of 4.4 mA /cm2 and 2.9 mA/cm2 at applied potential of 0.7 V under solar light intensity of 100 mW/cm2 for CIS and CZS-ZS respectively. Further, electrochemical impedance spectroscopy (EIS) confirms that PEC properties of CIS are superior to CZS-ZS photoanode as the former offer less charge transfer resistance (Rct) 0.03 MΩ in comparison to CZS-ZS having Rct value of 0.06 MΩ.

Electrolytes play a significant role in improving the stability and specific capacity of supercapacitors; however, they have gained less attention compared to the designing of electrode materials. This study presents the supercapacitor application of novel Prussian blue analog (PBA)-based fabricated electrodes in different electrolytes. PBA was derived by the ligand substitution of sodium pentacyanonitrosyl ferrate(III) dihydrate followed by precipitation with cobalt salt to yield cobalt pentacyano(methylaniline)ferrate(II) (CoPCF). The fabricated electrode exhibited specific capacity of 390, 233, 175, and 83 mA h g−1 in 3 M KOH, 1 M NaOH, 1 M LiOH, and 1 M KNO3 at 1 A g−1 with capacity retention of 88.80%, 89.95%, 92.42%, and 90.80%, respectively, after 1000 continuous charge–discharge cycles. Furthermore, a solid-state asymmetric supercapacitor (ASC) device was fabricated using a PVA/KOH polymer gel electrolyte that exhibited a specific capacity of 56 mA h g−1 with a specific energy density of 71 W h kg−1 and a specific power density of 2560 W kg−1 at a current density of 1 A g−1, with excellent capacity retention of 93% over 2000 continuous (dis)charge cycles. These results demonstrated that the introduction of organic ligands in the framework of PBAs along with the selection of the right electrolyte is an effective strategy in the development of high-capacity and stable supercapacitor electrodes. [ABSTRACT FROM AUTHOR]

Efficient electrocatalysts are needed to produce clean energy. Noble metals show excellent catalytic activity, but the high cost of these materials limits their practical utility. 2D materials like carbides and nitrides possess metallic properties, ceramic nature, and high surface area. These traits made 2D materials compete as electrocatalysts with efficient noble metals. In this work, TiO 2 nanoparticles were introduced in the layers and surface of V 2 C MXene which can further enhance the electron transport ability of carbide. The SEM images reveal the coverage of V 2 C MXene with TiO 2 nanoparticles. The V 2 C-TiO 2 nanocomposite was electrochemically tested for oxygen evolution reaction (OER). The nanocomposites exhibit an overpotential of 425 mV at the current density of 50 mA/cm2. The durability of the electrocatalyst was tested by chronoamperometry and it exhibited excellent stability for 48 h with negligible change in current density. Hence, a cost-effective electrocatalyst was prepared for OER. [Display omitted] • TiO 2 -V 2 C MXene composite was made to enhance electron transport ability of V 2 C. • The V 2 C-TiO 2 nanocomposite was electrochemically tested for OER. • The nanocomposites exhibit an overpotential of 425 mV at current density of 50 mA/cm2. • The V 2 C-TiO 2 nanocomposite as OER electrocatalyst was stable for 48 h. [ABSTRACT FROM AUTHOR]

In pursuit of efficient, cost-effective, and durable catalysts for the optical and electrochemical oxidation of methanol, platinum (Pt) nanoparticles deposited on a WO3–C support have an improved bandgap and electrochemical behavior as compared to Pt/C and Pt/WO3 electrocatalysts. Vulcan carbon was first purified and then functionalized, and the presence of oxygen-containing functional groups on the carbon was established from the FTIR spectrum. Platinum nanoparticles were deposited on the support by the reduction of a Pt-precursor under controlled conditions using sodium borohydride (NaBH4). The composition of the components in the catalyst (Pt/WO3–C) was set at Pt 10%, WO310%, and C 80% by weight. XRD describes the cell shape, volume, material density, and average crystallite size. TGA and BET studies describe the thermal stability and surface area of the synthesized electrocatalyst supports. TEM and FESEM were employed to visualize the uniform distribution of Pt nanoparticles on the different supports and the surface topography of Pt/WO3–C, Pt/WO3, and Pt/C. UV studies demonstrated the optical band gap from the Tauc plot of all three samples. The activities and durability of the catalysts for methanol oxidation were determined by using cyclic voltammetry. A comparison revealed that all of the relevant quantities, like specific surface area, durability, peak, and exchange currents, were appreciably higher for Pt/WO3–C. The heterogeneous constant for methanol oxidation by Pt/WO3–C in an acidic medium was 10 and 3 times higher than that of Pt/C and Pt/WO3, respectively. In electrochemical impedance studies, the charge transfer resistance values were elucidated from Nyquist and Bode plots. The higher increment in optical properties, as well as methanol electrooxidation performance, of the Pt/WO3–C catalyst is attributed to the abrupt removal of CO, facilitating methanol adsorption on fresh and regenerated Pt sites in the presence of WO3. This study has proved that WO3 inclusion into the support improves the optical features, proficiency, and durability of Pt/C. [ABSTRACT FROM AUTHOR]