A5024684382- Graphene research and applications
- Carbon and Quantum Dots Applications
- Perovskite Materials and Applications
- Graphene and Nanomaterials Applications
- Advanced Memory and Neural Computing
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Luminescence Properties of Advanced Materials
- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Luminescence and Fluorescent Materials
- Nanocluster Synthesis and Applications
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- 2D Materials and Applications
- Electrocatalysts for Energy Conversion
- Carbon Nanotubes in Composites
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Magnetic and transport properties of perovskites and related materials
- Solid-state spectroscopy and crystallography
- Phase-change materials and chalcogenides
- Copper-based nanomaterials and applications
Guangxi Normal University
2014-2025
Collaborative Innovation Center of Advanced Microstructures
2012-2016
Nanjing University
2012-2016
State Council of the People's Republic of China
2015
Abstract Doping of low-dimensional graphitic materials, including graphene, graphene quantum dots and single-wall carbon nanotubes with nitrogen, sulfur or boron can significantly change their properties. We report that simple fluorination followed by annealing in a dopant source superdope materials high level N, S B. The superdoping results the following doping levels: (i) for 29.82, 17.55 10.79 at% N-, S- B-doping, respectively; (ii) dots, 36.38 N-doping; (iii) nanotubes, 7.79 10.66 N-...
The oxygen evolution reaction (OER) underpins many aspects of energy storage and conversion in modern industry technology, but which still be suffering from the dilemma sluggish kinetics poor electrochemical performance. Different viewpoint nanostructuring, this work focuses on an intriguing dynamic orbital hybridization approach to renormalize disordering spin configuration porous noble-metal-free metal-organic frameworks (MOFs) accelerate spin-dependent OER. Herein, we propose...
Abstract Photochromic materials are widely used in optical data storage, encryption, and anti‐counterfeiting because of their ability to be written, erased, read repeatedly. However, conventional information encryption storage capabilities based on a “matrix” pattern 2D plane limited fewer dimensions, making less secure. Here, new concept expanding the dimensions is presented by manipulating rotation angle photochromic encoding disks principle absolute encoder. For this purpose, novel...
Fluorinated graphene quantum dots (F-GQDs) were synthesized by cutting fluorinated through a hydrothermal approach. The F-GQDs with oxygen-rich functional groups have F/C atomic ratio of ca. 23.68% and diameter 1-7 nm. photoluminescence (PL) properties the investigated. results showed that besides exhibiting bright blue PL, display clear upconversion PL.
Abstract The long spin diffusion length makes graphene very attractive for novel spintronic devices and thus has triggered a quest integrating the charge degrees of freedom. However, ideal is intrinsic non-magnetic, due to delocalized π bonding network. Therefore, synthesis ferromagnetic or its derivatives with high magnetization urgent both fundamental technological importance. Here we report that N-doping can be an effective route obtain ca. 1.66 emu/g make oxide (GO) ferromagnetism...
Fluorination was confirmed to be the most effective route introduce localized spins in graphene. However, adatoms clustering perfect graphene lead a low efficiency. In this study, we report experimental evidence of generation spin magnetic moments on defective (reduced oxide) through fluorination. More interstingly, result shows that defects help increase efficiency fluorination with regard density created. Fluorinated reduced oxide can have high moment 3.187 × 10–3 μB per carbon atom and...
Highly oxidative debris (OD) was obtained by aqueous ammonia wash of as-prepared graphene oxide (GO) which composed OD and lightly GO sheets. The magnetic properties were studied. results showed that has a low magnetization 0.16 emu/g, the can be increased from 0.38 to 0.42 emu/g discarding low-magnetization OD. Thus, this study provided reliable method increase GO. Hydroxyl groups proposed source.
Li-CO2 battery provides a new strategy to simultaneously solve the problems of energy storage and greenhouse effect. However, severe polarization CO2 reduction evolution reaction impede practical application. Herein, anodic TiO2 nanotube arrays are first introduced as carbon-free free-standing cathode for photo-assisted battery, charge discharge mechanism is clarified from perspective photocatalysis. Mixed-phase exhibits long cycling life 580 h (52 cycles) at 0.025 mA cm-2 delivers high...
Inducing robust magnetic moments on the basal plane of graphene sheet is very difficult, and one greatest challenges in study physical chemistry materials. Theoretical studies predicted that introduction a kind sp(3)-type defects formed by OH groups an effective pathway to achieve this goal [Boukhvalov, D. W. &Katsnelson, M. I. ACS Nano 5, 2440-2446 (2011)]. Here we demonstrate can efficiently induce sheet. We show inducing efficiency reach as high 217 μB per 1000 groups. More interestingly,...
Nitrogen-doped graphene quantum dots (NGQDs) were synthesized by irradiating (GQDs) in an NH3 atmosphere. The photoluminescence (PL) properties of the GQDs and NGQDs samples investigated. Compared with GQDs, a clear PL blue-shift could be achieved regulating time. obtained irradiation for 70 min had high N content 15.34 at % about 47 nm. This may due to fact that photochemical doping nitrogen can significantly enhance contents pyridine-like nitrogen, also effectively decrease oxygen...
Reduced graphene oxide quantum dots (rGOQDs) were synthesized by annealing GOQDs in H2 atmosphere. The photoluminescence (PL) properties of and the rGOQDs samples investigated. results showed that compared to GOQDs, a blue purple tunable PL can be obtained regulating temperature. increase fraction newly formed isolated sp2 clusters may responsible for observed PL.
A gram-scale approach has been developed to prepare highly pure graphene quantum dots (GQDs) from Vulcan XC-72 carbon black refluxed with concentrated nitric acid using a home-built experimental system.
Photo-stimuli responsive materials show great potential in the fields of information encryption and storage due to their distinctive spatial or temporal color changes. However, conventional single multi-color static outputs by light stimulus difficulty meet practical requirements for high-security optical technologies. Here, a novel dynamic irradiation-responsive phosphor Na<sub>2</sub>Ba<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>:Eu is demonstrated, exhibiting high stability convenient readout...
Nitrogen-doped graphene oxide (NGO) was synthesized by irradiation of (GO) in NH3 atmosphere. NGO obtained GO for 10 min has high N content 13.62 at. %. The photoluminescence (PL) properties were investigated. results showed that compared with GO, exhibits significant PL enhancement a ratio approximately 1501.57%. It may attribute to the amino-like N, which can effectively enhance because amino conjugation effect.
Reduced graphene oxide–carbon nanotube (RGO–CNT) hybrid materials were prepared by a simple catalyst-free route. The thermostability, photoluminescence (PL) and electrical properties of RGO–CNTs investigated systematically. results revealed that compared to RGO, showed multicolor PL, higher thermostability conductivity. therefore have important potential applications in the fields photonic devices.
Light-modulated lead-free perovskites-based memristors, combining photoresponse and memory, are promising as multifunctional devices. In this work, double perovskite Cs2AgBiBr6 films with dense surfaces uniform grains were prepared by the low-temperature sol-gel method on indium tin oxide (ITO) substrates. A memory device based a film, Pt/Cs2AgBiBr6/ITO/glass, presents obvious bipolar resistive switching behavior. The ROFF/RON ratio under 445 nm wavelength light illumination is ~100 times...
Abstract Non‐volatile photomemory based on photomodulated luminescent materials offers unique advantages over voltage‐driven memory, including low residual crosstalk and high storage speed. However, conventional have thus far been volatile insecure for data because of trap depth single‐level channels. Therefore, the development a novel non‐volatile multilevel medium encryption remains challenge. Herein, robust, non‐volatile, optical is reported, Ba 3 MgSi 2 O 8 :Eu 3+ , which combined merits...