A5100346461- Advanced Photocatalysis Techniques
- ZnO doping and properties
- TiO2 Photocatalysis and Solar Cells
- Electronic and Structural Properties of Oxides
- 2D Materials and Applications
- Copper-based nanomaterials and applications
- Metal and Thin Film Mechanics
- Silicon and Solar Cell Technologies
- Semiconductor materials and devices
- MXene and MAX Phase Materials
- Quantum Dots Synthesis And Properties
- Semiconductor materials and interfaces
- Catalytic Processes in Materials Science
- Diamond and Carbon-based Materials Research
- Chalcogenide Semiconductor Thin Films
- Advanced Battery Materials and Technologies
- Lubricants and Their Additives
- Gas Sensing Nanomaterials and Sensors
- Advancements in Battery Materials
- Ga2O3 and related materials
- Electrocatalysts for Energy Conversion
- Graphene research and applications
- Magnetic and transport properties of perovskites and related materials
- Thin-Film Transistor Technologies
- Perovskite Materials and Applications
Jilin University of Chemical Technology
2024
Beijing Normal University
2024
Nantong University
2024
Western Sydney University
2014-2023
Fudan University
2022-2023
Shandong Normal University
2022
Zhejiang University
2020
Wuhan Textile University
2018
Hubei University
2014
Tianjin University
2012
Abstract Layered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to gliding layers upon Na + extraction insertion in materials. Here, we report that large-sized K is riveted prismatic sites P2-Na 0.612 0.056 MnO 2 enable more thermodynamically favorable vacancies. The Mn-O bonds reinforced reduce during charge discharge. 0.901 per formula reversibly...
Abstract Low‐cost layered oxides free of Ni and Co are considered to be the most promising cathode materials for future sodium‐ion batteries. Biphasic Na 0.78 Cu 0.27 Zn 0.06 Mn 0.67 O 2 obtained via superficial atomic‐scale P3 intergrowth with P2 phase induced by doping, consisting inexpensive transition metals, is a The as covering layer in this composite shows not only excellent electrochemical performance but also its tolerance moisture. results indicate that partial substitutes can...
MoS2 nanosheets were doped with vanadium (V) a variety of concentrations using hydrothermal method. Raman, X-ray photoelectron spectroscopy, and electron paramagnetic resonance results indicate the effective substitutional doping in MoS2. Without V doping, oxides such as MoO2 MoO3 have been observed, whereas 5 at% oxide disappeared. Magnetic measurements show that room temperature ferromagnetism has induced by doping. Magnetization tends to increase increased concentration. A very large...
Materials with high thermal conductivities (κ) are valuable to solve the challenge of waste heat dissipation in highly integrated and miniaturized modern devices. Herein, we report first synthesis atomically thin isotopically pure hexagonal boron nitride (BN) its one highest κ among all semiconductors electric insulators. Single atomic layer (1L) BN enriched ^{11}B has a up 1009 W/mK at room temperature. We find that isotope engineering mainly suppresses out-of-plane optical (ZO) phonon...
Abstract A novel multidimensional Mg-doped superlattice (SL) is proposed to enhance vertical hole conductivity in conventional AlGaN SL which generally suffers from large potential barrier for holes. Electronic structure calculations within the first-principle theoretical framework indicate that densities of states (DOS) valence band nearby Fermi level are more delocalized along c -axis than SL, and significantly decreases. Hole concentration greatly enhanced SL. Detailed comparisons partial...
Abstract Introducing ferromagnetism in transition metal dichalcogenides has attracted lots of attention due to the possible applications spintronics devices. Generally, single magnetic element doping is used introduce magnetism. However, mostly, weak observed. In this work, codoping two kinds metals (Nb and Co) into WSe 2 study its properties. detail, crystal codoped with 4 at% Co various concentrations Nb by employing physical ion implantation method. Raman, X‐ray diffraction photoelectron...
The challenges of making high-performance, low-temperature processed, p-type transparent conductors (TCs) have been the main bottleneck for development flexible electronics. Though a few conducting oxides (TCOs) shown promising results, they need high processing temperature to achieve required conductivity which makes them unsuitable organic and electronic applications. Copper iodide is wide band gap semiconductor that can be heavily doped at low (<100 °C) comparable or higher than many...
It has previously been shown that ex situ phosphorus-doped polycrystalline silicon on oxide (poly-Si/SiOx) passivating contacts can suffer a pronounced surface passivation degradation when subjected to firing treatment at 800 °C or above. The behavior depends strongly the processing conditions, such as dielectric coating layers and temperature. current work further studies stability of poly-Si proposes mechanism for observed based role hydrogen. Secondary ion mass spectrometry is applied...
Photon energy loss to interfacial charge recombination is one of the key challenges achieving high efficiencies for solar water splitting in photoelectrochemical cells (PECs). Herein, BiVO4-based photoanodes are constructed, where BiVO4, cadmium sulfide nanosheets (CdS NSs), hole transport molecules (HTs), and oxygen evolution cocatalysts (OECs) assemble sequentially a cascade band alignment efficient photogenerated extraction accumulation OECs. In photoanode assemblies, CdS NSs act as...
Alkaline polyphosphate has been demonstrated to be able reduce significant wear and friction of sliding interfaces under heavy loads (>1 GPa) elevated temperature (800 °C above) conditions, e.g. hot metal manufacturing. The chemical composition fine structure lubricating film is not well understood as the role alkaline elements within reaction at rubbing surface. This work makes use coupling surface analytical techniques on tribofilm, XANES, TOF-SIMS FIB/TEM. data show in gradient...
Abstract This work compares the firing response of ex‐situ doped p‐ and n‐type polysilicon (poly‐Si) passivating contacts identifies possible mechanisms underlying their distinct behavior. The p‐type poly‐Si shows greater stability than poly‐Si, particularly at a higher temperature, which results in substantial increase recombination current density parameter J 0 from 9 to 96 fA/cm 2 upon 900°C for comparison an 11 30 poly‐Si. It is observed that only suffer slight degradation or even...
Residual drug pollutants in water environments represent a severe risk to human health, so developing cheap, environmentally friendly, and effective photocatalyst deal with them has become hot topic. Herein, magnetically separable Fe3O4@TiO2/g-C3N4 special heterojunction structure was fabricated, its photocatalytic performance assessed by degrading tetracycline (TC). Compared Fe3O4@TiO2, the synthesized exhibited superior TC degradation performance, which primarily ascribed formed between...
Colossal saturation magnetization and giant coercivity are realized in MoS2 single crystals doped with Nb and/or Co using an ion implantation method. Magnetic measurements have demonstrated that codoping 2 at % 4 invoked a "giant" coercivity, as high 9 kOe 100 K. Doping solely 5 induces "colossal" of 1800 emu/cm3 K, which is higher than metallic Co. The due to the formation Nb-rich defect complexes, confirmed by first-principles calculations. It proposed combined effects strong directional...
Well-aligned ultrathin corrugated nanowire TiO 2 (UCW-TiO ) on FTO was used as a versatile photoanode platform for PEC benzyl alcohol and water oxidation with significant performance improvement compared to the nanoparticulate counterparts.
Abstract Low‐cost layered oxides free of Ni and Co are considered to be the most promising cathode materials for future sodium‐ion batteries. Biphasic Na 0.78 Cu 0.27 Zn 0.06 Mn 0.67 O 2 obtained via superficial atomic‐scale P3 intergrowth with P2 phase induced by doping, consisting inexpensive transition metals, is a The as covering layer in this composite shows not only excellent electrochemical performance but also its tolerance moisture. results indicate that partial substitutes can...
Five percent Fe-doped In2O3 films were deposited using a pulsed laser deposition system. X-ray diffraction and transmission electron microscopy analysis show that the under oxygen partial pressures of 10–3 10–5 Torr are uniform without clusters or secondary phases. However, film 10–7 has Fe-rich phase at interface. Magnetic measurements demonstrate magnetization increases with decreasing pressure. Muon spin relaxation (μSR) indicates volume fractions ferromagnetic phases in PO2 = 10–3, 10–5,...
Co doped ZnO films have been deposited by a laser-molecular beam epitaxy system. X-ray diffraction and UV spectra analysis show that effectively substitutes the Zn site. Transmission electron microscopy (TEM) secondary ion mass spectroscopy indicate there are no clusters. dopants uniformly distributed in film. Ferromagnetic ordering is observed all samples under an oxygen partial pressure, ${\mathrm{PO}}_{2}={10}^{\ensuremath{-}3}, {10}^{\ensuremath{-}5}$, ${10}^{\ensuremath{-}7}$ torr,...
Abstract Various concentrations (0, 0.5, 1, and 5 at%) of Nd are doped into MoS 2 single crystals via ion implantation. Experimental results reveal that exists in the form trivalent state when doping concentration is below at% a variety defects, such as sulfur molybdenum vacancies, formed Nd‐doped . Compared to pure only shows diamagnetism, successfully induces room‐temperature ferromagnetic ordering. Extremely high magnetization (1640 emu cm −3 ) observed 1 First‐principles density...