A5032855719- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Nanowire Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Chalcogenide Semiconductor Thin Films
- Anodic Oxide Films and Nanostructures
- Drilling and Well Engineering
- Advancements in Battery Materials
- Silicon Nanostructures and Photoluminescence
- Advanced Battery Materials and Technologies
- Hydraulic Fracturing and Reservoir Analysis
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Advanced biosensing and bioanalysis techniques
- ZnO doping and properties
- Carbon Nanotubes in Composites
- Gold and Silver Nanoparticles Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Solid-state spectroscopy and crystallography
- Graphene research and applications
- Hydrocarbon exploration and reservoir analysis
- Diamond and Carbon-based Materials Research
Peking University
2016-2025
State Key Laboratory for Structural Chemistry of Unstable and Stable Species
2015-2024
Beijing National Laboratory for Molecular Sciences
2015-2024
China University of Petroleum, Beijing
2014-2024
First Hospital of Jilin University
2024
Jilin University
2024
Shanghai University of Traditional Chinese Medicine
2024
Shanghai Second People's Hospital
2024
TEDA International Cardiovascular Hospital
2015-2024
Shuguang Hospital
2024
Highly ordered TiO2 single-crystalline nanowire arrays have been fabricated within the pores of anodic aluminum oxide (AAO) template by a cathodically induced sol−gel method. Raman spectra confirmed that nanowires are composed pure anatase TiO2. TEM investigations indicated these uniform tetragonal single-crystal structure. Finally, possible growth mechanism is discussed.
We report here an electrodeposition route for the preparation of oriented and well-defined ZnO nanostructures by kinetically controlling growth rates various facets deposit appropriate capping agents. demonstrated that adsorption Cl(-) takes places preferentially onto (0001) planes to hinder crystal along c-axis, results in formation platelet-like crystals. It is also shown morphology evolved from hexagonal tapers rods rhombohedral changing compositions Furthermore, strong UV emissions at...
The power conversion efficiency (PCE) of CH3NH3PbX3 (X = I, Br, Cl) perovskite solar cells has been developed rapidly from 6.5 to 18% within 3 years. However, the anomalous hysteresis found in I-V measurements can cause an inaccurate estimation efficiency. We attribute phenomena ferroelectric effect and build a model based on diode explain it. CH3NH3PbI3-xClx is strongly suggested by characterization methods E-P (electrical field-polarization) loop. curves greatly depend scan range as well...
Splitting of alcohols into hydrogen and corresponding carbonyl compounds has potential applications in production chemical industry. Herein, we report that a heterogeneous photocatalyst (Ni-modified CdS nanoparticles) could efficiently split aldehydes or ketones stoichiometric manner under visible light irradiation. Optimized apparent quantum yields 38%, 46%, 48% were obtained at 447 nm for dehydrogenation methanol, ethanol, 2-propanol, respectively. In the case turnover number greater than...
Tetragonal faceted-nanorods of single-crystalline anatase TiO(2) with a large percentage higher-energy {100} facets have been synthesized by hydrothermal transformation alkali titanate nanotubes in basic solution.
Abstract Photocatalysis, which can directly convert solar energy into chemical and simultaneously accomplish conversion storage objectives, is regarded as one of the most promising strategies to address supply environmental degradation issues. In recent decades, great efforts encouraging achievements are performed in field semiconductor photocatalysts. Herein, this progress report summarizes investigations focuses on advanced semiconductor‐based nanocomposite materials structures novel...
Understanding interfacial loss and the ways to improving property is critical fabricate highly efficient reproducible perovskite solar cells (PSCs). In SnO2 -based PSCs, nonradiative recombination sites at -perovskite interface lead a large potential performance variation in resulting photovoltaic devices. Here, novel -in-polymer matrix (i.e., polyethylene glycol) devised as electron transporting layer improve film quality of layer. The fabricated through spin-coating polymer-incorporated...
Conversion of CO2 into fuels via solar energy would be a promising strategy to reduce emissions and produce value-added carbon compounds. However, the development efficient light-harvesting photocatalytic systems remains significant challenge because scarcity low-cost high-efficiency catalysts in conversion. Herein, tunable selectivity photothermal conversion was demonstrated over series Fe-based developed through simple hydrogenation/carbonization treatment with commercial Fe3O4 as...
Abstract Soft lattice and strong exciton–phonon coupling have been demonstrated in layered double perovskites (LDPs) recently; therefore, LDPs represents a promising class of compounds as excellent self‐trapped exciton (STE) emitters for applications solid‐state lighting. However, few with outstanding STE emissions discovered, their optoelectronic properties are still unclear. Based on the three‐dimensional (3D) Cs 2 NaInCl 6 , we synthesized two 2D derivatives (PEA) 4 8 :Sb...
Dry reforming of methane (DRM) has provided an effective avenue to convert two greenhouse gases, CH4 and CO2 , into syngas. Here, we design a DRM photocatalyst Rh/Cex WO3 that invokes both photothermal photoelectric processes, which overcomes the thermodynamic limitation under conventional conditions. In contrast plasmonic or UV-response photocatalysts, our produces superior light-to-chemical energy efficiency (LTCEE) 4.65 % with moderate light intensity. We propose light-induced...
The stable cycling of Mg-metal anodes is limited by several problems, including sluggish electrochemical kinetics and passivation at the Mg surface. In this study, we present a high-entropy electrolyte composed lithium triflate (LiOTf) trimethyl phosphate (TMP) co-added to magnesium bis(trifluoromethane sulfonyl)imide (Mg(TFSI)2 /1,2-dimethoxyethane (DME) significantly improve performance anodes. as-formed Mg2+ -2DME-OTf- -Li+ -DME-TMP solvation structure effectively reduced -DME interaction...
Large-area noncurling crystallized free-standing TiO2 nanotube (TNT) arrays have been fabricated by a two-step anodization process. These TNT can be easily transferred to fluorine-doped tin oxide glass substrates without any crack. Furthermore, the investigation of these in dye-sensitized solar cells (DSSCs) was carried out and showed roughly 100% enhanced conversion efficiency compared with that array on Ti substrate.
Yolk/shell particles possess a unique structure that is composed of hollow shells encapsulate other but with an interstitial space between them. These structures are different from core/shell in the core freely movable shell. combine properties each component, and can find potential applications catalysis, lithium ion batteries, biosensors. In this Research News article, soft-template-assisted method for preparation yolk/silica shell presented. The demonstrated simple general, produce silica...
In this paper, we develop a simple and general method for the fabrication of yolk/shell structures through one-step encapsulation particles by SiO(2) shells in aqueous mixtures lauryl sulfonate betaine (LSB) sodium dodecyl benzenesulfonate (SDBS). Various with different particle cores, such as SiO(2)@SiO(2), Au@SiO(2), Fe(2)O(3)@SiO(2), have been successfully prepared.
Anatase TiO(2) nanosheets-based hierarchical spheres with over 90% {001} facets synthesized via a diethylene glycol-solvothermal route were used as photoanodes of dye-sensitized solar cells, which generated an energy conversion efficiency 7.51%.
We first report a facile hydrothermal route for preparing TiO2(B) nanowires with ultrahigh surface area, up to 210 m2 g−1. Due the 1D structure, high BET area and shorter b-and c-axis channel across nanowires, obtained nanowire was shown be good anode material lithium-ion batteries, especially on fast charging discharging performance.
In this study, well-crystallized mesoporous anatase TiO2 spheres were prepared by hydrothermal treatment of the titanium diglycolate precursors. These are submicrometer-sized and consist packed nanocrystallites with diameters ∼8 nm, possess a specific surface area 193 m2 g−1 main pore sizes ∼5 nm. We demonstrated that due to large particle ultrahigh areas, microspheres can enhance light harvesting within photoanodes for dye-sensitized solar cells (DSSCs), meanwhile, their good crystallinity...
We present a two-step electrochemical deposition process to produce hierarchical ZnO nanostructures that involves the electrodeposition of crystals with different morphologies, followed by epitaxial growth oriented nanorods on surfaces primary nanostructures. A variety nanostructures, including 2-fold nanorod arrays nanosheets, 6-fold nanorods, and nanoneedles nanoneedles, were synthesized large scale. The obtained this technique are pure uniform in morphology. Furthermore, we demonstrate...
We report on the first controlled alternation between memory and threshold resistance switching (RS) in single Ni/NiO core–shell nanowires by setting compliance current (ICC) at room temperature. The RS is triggered a high ICC, while appears low Reset process achieved without ICC. In combination with first-principles calculations, physical mechanisms for are fully discussed attributed to formation of an oxygen vacancy (Vo) chain conductive filament electrical field induced breakdown forming...
In recent years, metal-organic frameworks (MOFs) have received extensive interest because of the diversity their composition, structure, and function. To promote MOFs' function performance, construction hollow structural nanoparticle-MOF composites is significantly effective but remains a considerable challenge. this article, transformation strategy developed to synthesize Co-MOF-74 by solvothermal ZIF-67. These particles exhibit double-layer shell structure without remarkable shape change...
Abstract Composition engineering of halide perovskite allows the tunability band gap over a wide range so that photons can be effectively harvested, an aspect is critical importance for increasing efficiency photocatalysis under sunlight. However, poor stability and low photocatalytic activity perovskites prevent use these defect‐tolerant materials in applications involving photocatalysis. Here, alcohol‐based system dye degradation demonstrated high through double Cs 2 AgBiBr 6 . The...
Mass production of high-quality graphene flakes is important for commercial applications. Graphene microsheets have been produced on an industrial scale by chemical and liquid-phase exfoliation graphite. However, strong-interaction-induced interlayer aggregation usually leads to the degradation their intrinsic properties. Moreover, crystallinity or layer-thickness controllability not so perfect fulfill requirement advanced technologies. Herein, we report a quartz-powder-derived vapor...
Double halide perovskites are a class of promising semiconductors applied in photocatalysis, photovoltaic devices, and emitters to replace lead perovskites, owing their nontoxicity chemical stability. However, most double always exhibit low photoluminescence quantum efficiency (PLQE) due the indirect bandgap structure or parity-forbidden transition problem, limiting further applications. Herein, self-trapped excitons emission Cs2 NaInCl6 by Sb-doping, showing blue with high PLQE 84%, is...