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P-N Bonds-Mediated Atomic-Level Charge-Transfer Channel Fabricated between Violet Phosphorus and Carbon Nitride Favors Charge Separation and Water Splitting.
Small
July 2024
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Heterostructures are widely employed in photocatalysis to promote charge separation and photocatalytic activity. However, their benefits are limited by the linkages and contact environment at the interface. Herein, violet phosphorus quantum dots (VPQDs) and graphitic carbon nitride (g-CN) are employed as model materials to form VPQDs/g-CN heterostructures by a simple ultrasonic pulse excitation method.
View Article and Find Full Text PDFIntrinsic piezoelectricity of 2D violet phosphorene.
Nanoscale
June 2023
The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi'an 710071, China.
Violet phosphorene (VP) has an extensive range of potential uses in piezoelectric gadgets due to its excellent electron transport capabilities. Nevertheless, VP materials are devoid of the piezoelectric effect because of the absence of ionic polarity. In this study, the piezoelectric capacity of the VP nano-sheet was investigated.
View Article and Find Full Text PDFRational Design of Black Phosphorus-Based Direct Z-Scheme Photocatalysts for Overall Water Splitting: The Role of Defects.
J Phys Chem Lett
October 2022
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan250100, China.
Black phosphorus (BP) has received increasing interest as a promising photocatalyst for water splitting. Nevertheless, exploring the underlying hydrogen evolution reaction (HER) mechanism and improving the water oxidizing ability remains an urgent task. Here, using first-principles calculations, we uncover the role of point defects in improving the HER activity of BP photocatalysts.
View Article and Find Full Text PDFDirectional effects in plasmon excitation and transition radiation from an anisotropic 2D material induced by a fast charged particle.
Nanoscale
March 2022
Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada.
We present a relativistic formulation of the energy loss of a charged particle traversing an anisotropic layer under arbitrary angle of incidence. We use a model for the conductivity tensor describing doped phosphorene, which supports plasmon polariton modes (PPMs) that exhibit a topological transition between elliptic and hyperbolic iso-frequency dispersion curves in the THz to the mid-infrared (MIR) frequency range. The total distribution of the momentum transfer and energy loss of the charged particle goes to excitation of the PPMs followed by their decay in phosphorene (Ohmic losses) and the energy that is emitted as transition radiation (TR).
View Article and Find Full Text PDFDesigning Direct Z-Scheme Heterojunctions Enabled by Edge-Modified Phosphorene Nanoribbons for Photocatalytic Overall Water Splitting.
J Phys Chem Lett
January 2022
Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230 026, China.
Direct Z-scheme photocatalyst possess promising potential to utilize solar radiation for photocatalytic overall water splitting; however, the design and characterization remain challenging. Here, we construct and verify a direct Z-scheme heterojunction using edge-modified phosphorene-nanoribbons (X-PNRs, where X = OH and OCN) with first-principles ground-state and excited-state density functional theory (DFT) calculations. The ground-state calculations provide fundamental properties such as geometric structure and band alignment.
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