Electronic structures and charge transport mobilities in hybrid organic-inorganic mixed Sn-Pb alloyed perovskites.

An all-perovskite tandem cell based on narrow-bandgap mixed tin-lead (Sn-Pb) alloyed perovskites is a potential photovoltaic device whose power conversion efficiency can exceed the Shockley-Queisser limit of a single-junction solar cell, 33%. However, comprehensive descriptions of the charge-carrier mobilities and transport mechanisms in the mixed Sn-Pb perovskite system remain elusive. Herein, we integrate density functional theory (DFT) calculations with charge transport models to provide more insight into the electronic structures and transport behaviors of these materials.

In-depth analysis of embedded-type structures of NiMgAl LDO-composited catalysts and the impacts on glycerol conversion under a base- and H-free condition.

Core-shell composite catalysts composing of AgO@SnO/ZSM-5 embedded by NiMgAlO LDOs with various Ni/Mg ratios were characterized and tested for the activity on the conversion of glycerol to valuable chemicals under a base-free and external H-free condition. As a result, the catalytic performance of an embedded composite was found greater than that of its individual constituents, owing to the synergy between a NiMgAlO lodge and embedded AgO@SnO/ZSM-5. The highest yield of 1,2-propanediol and lactic acid was achieved at the Ni/Mg ratio of 0.

Tuning Surface Energy to Enhance MoS Nanosheet Production Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride.

Environmental pollution caused by radionuclides like Cs-137 and Cs-134 has increased global attention toward public health. Electrochemical adsorption has emerged as a feasible, rapid, and scalable method to treat contaminated water sources. However, graphene and its derivatives have limitations in ion adsorption physisorption, forming a double layer that restricts the electrode's adsorption capacity.

Molecular adsorption and self-diffusion of NO, SO, and their binary mixture in MIL-47(V) material.

The loading dependence of self-diffusion coefficients () of NO, SO, and their equimolar binary mixture in MIL-47(V) have been investigated by using classical molecular dynamics (MD) simulations. The of NO are found to be two orders of magnitude greater than SO at low loadings and temperatures, and its decreases monotonically with loading. The of SO exhibit two diffusion patterns, indicating the specific interaction between the gas molecules and the MIL-47(V) lattice.

Synthesis and application of fluorescent N-doped carbon dots/hydrogel composite for Cr(VI) adsorption: Uncovering the ion species transformation and fluorescent quenching mechanism.

A fluorescent composite material fabricated from nitrogen-doped carbon dots with polyvinyl alcohol (PVA)/polyvinylpyrrolidone (PVP)/citric acid (CA) hydrogel was synthesized using a microwave-assisted hydrothermal method. The composite was used as a metal ion sensor and adsorbent to remove chromium (Cr(VI)) from water. The chemical structure and Cr(VI) removal performance of the fluorescent composite films were also characterized.

Effect of substitution on the superconducting phase of transition metal dichalcogenide Nb(Se[Formula: see text]S[Formula: see text])[Formula: see text] van der Waals layered structure.

By means of first-principles cluster expansion, anisotropic superconductivity in the transition metal dichalcogenide Nb(Se[Formula: see text]S[Formula: see text])[Formula: see text] forming a van der Waals (vdW) layered structure is observed theoretically. We show that the Nb(Se[Formula: see text]S[Formula: see text])[Formula: see text] vdW-layered structure exhibits minimum ground-state energy. The Pnnm structure is more thermodynamically stable when compared to the 2H-NbSe[Formula: see text] and 2H-NbS[Formula: see text] structures.

Highly selective circular dichroism sensor based on d-penicillamine/cysteamine‑cadmium sulfide quantum dots for copper (II) ion detection.

A highly selective circular dichroism sensor based on cysteamine-capped cadmium sulfide quantum dots (Cys-CdS QDs) was successfully developed for the determination of Cu. Basically, the Cys-CdS QDs are not active in circular dichroism spectroscopy. However, the circular dichroism probe (DPA@Cys-CdS QDs) can be simply generated in situ by mixing achiral Cys-CdS QDs with D-penicillamine.