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Evaluation of the actinia-shaped composite coagulant for removal of algae in water: Role of charge density.
J Hazard Mater
January 2025
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China. Electronic address:
A series of novel cationic modified actinia-shaped composite coagulant (AMS-C), with similar tentacle length and distribution but different charge density (CD), was successfully designed and fabricated by combination of a cationic graft starch and attapulgite (ATP). AMS-C shows a high efficiency in coagulative removal of Microcystis aeruginosa from water over a wide pH range. The algae-harvesting efficiency of optimized AMS-C can reach to 92.
View Article and Find Full Text PDFConstruction of a red phosphorus-molybdenum dioxide electron-rich interface for efficient photocatalytic reduction of carbon dioxide.
J Colloid Interface Sci
January 2025
School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China. Electronic address:
Developing efficient catalysts to enhance photoreduction carbon dioxide (CO) into hydrocarbon fuels is a great challenge. As metallic material, molybdenum dioxide (MoO) has very high conductivity and charge density, which make it a promising candidate as photocatalyst. However, its photocatalytic activity is limited by the serious charge recombination.
View Article and Find Full Text PDFScaling Behavior of Ionic Conductance Dependent on Surface Charge Inside a Single-Digit Nanopore.
Molecules
January 2025
School of Mechanical Engineering, Chongqing Three Gorges University, Chongqing 404100, China.
Article Synopsis
- The ionic conductance in charged nanopores exhibits a power-law behavior at low salinity, influenced by surface charges that affect zeta potential and ion distributions.
- Accurately measuring surface charge density in single-digit nanopores poses challenges, leading researchers to develop new methodologies to investigate these effects.
- Through experiments with silicon nitride nanopores, a modified conductance model was established to analyze the relationship between pore concentration, surface charges, and potential leakage, allowing for a better understanding of ion mobility in nanopores.
The inductive effect does not explain electron density in haloacetates: are our textbooks wrong?
Chem Sci
December 2024
College of Science, Engineering and Environment, University of Newcastle Callaghan NSW 2308 Australia.
The inductive effect is a central concept in chemistry and is often exemplified by the p values of acetic acid derivatives. The reduction in p is canonically attributed to the reduction in the electron density of the carboxylate group through the inductive effect. However, wave functional theory calculations presented herein reveal that the charge density of the carboxylate group is not explained by the inductive effect.
View Article and Find Full Text PDFToward mitigating the impact of non-bulk defects on describing water structure in salt aqueous solutions: Characterizing solution density with a network-based structural indicator.
J Chem Phys
January 2025
State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China.
Structural indicators, also known as structural descriptors, including order parameters, have been proposed to quantify the structural properties of water to account for its anomalous behaviors. However, these indicators, mainly designed for bulk water, are not naturally transferrable to the vicinity of ions due to disruptions in the immediate neighboring space and a resulting loss of feature completeness. To address these non-bulk defects, we introduced a structural indicator that draws on the concept of clique number from graph theory and the criterion in agglomerative clustering, denoted as the average cluster number.
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