We report a one-step fabrication of macroscopic multifunctional graphene-based hydrogels with robust interconnected networks under the synergistic effects reduction graphene oxide sheets by ferrous ions and in situ simultaneous deposition nanoparticles on sheets. The functional components, such as α-FeOOH nanorods magnetic Fe3O4 nanoparticles, can be easily incorporated to assemble monoliths just control pH value mild conditions. Such exhibit excellent capability for removal pollutants and,...

Free-standing graphene paper with a grey metallic luster has been fabricated for the first time, by convenient one-step method on large scale. Herein, assembly of oxide dispersion into ordered occurs simultaneously chemical reduction to graphene. The presents advantages good flexibility, low weight (0.2 g cm−3) and high electrical conductivity (15 Ω sq−1). Moreover, size shape are freely exchanged those Teflon substrate used. flexible graphene–PANI subsequently exhibits excellent...

Quantum dots (QDs) generally refer to nanoscale particles of conventional semiconductors that are subject the quantum-confinement effect, though other nanomaterials similar optical and redox properties also named as QDs even in absence strictly defined quantum confinement. Among such have attracted tremendous recent interest carbon dots, which small nanoparticles with some form surface passivation, graphene various configurations. In this article, we highlight these carbon-based by focusing...

Increasing atmospheric CO(2) levels have generated much concern, driving the ongoing carbon sequestration effort. A compelling option is its photocatalytic conversion to hydrocarbons, for which use of solar irradiation represents an ultimate solution. Here we report a new strategy using surface-functionalized small nanoparticles harvest visible photons subsequent charge separation on particle surface in order drive efficient process. The aqueous solubility catalysts enables photoreduction...

Boron nitride nanosheets were dispersed in polymers to give composite films with excellent thermal transport performances approaching the record values found polymer/graphene nanocomposites. Similarly high performance at lower BN loadings was achieved by aligning poly(vinyl alcohol) matrix simple mechanical stretching (see picture).

Abstract Organometal lead halide perovskites have been widely used as the light harvester for high-performance solar cells. However, typical of methylammonium halides (CH 3 NH PbX , X=Cl, Br, I) are usually sensitive to moisture in ambient air, and thus require an inert atmosphere process. Here we demonstrate a moisture-induced transformation perovskite crystals triple-layer scaffold TiO 2 /ZrO /Carbon fabricate printable mesoscopic An additive ammonium chloride (NH 4 Cl) is employed assist...

Carbon-based “quantum” dots (or “carbon dots”) are generally defined as surface-passivated small carbon nanoparticles that brightly fluorescent. Apparently, the particle surface passivation in is critical to their fluorescence performance. An effective way improve dope of precursor with an inorganic salt, followed by typical functionalization organic molecules. In this work we passivated a combination surface-doping nanoscale semiconductors and functionalization, coupled gel column...

Graphene is now the most attractive carbon-based material. Integration of 2D graphene sheets into macroscopic architectures such as fibers illuminates direction to translate excellent properties individual advanced hierarchical ensembles for promising applications in new graphene-based nanodevices. However, lack effective, low-cost and convenient assembly strategy has blocked its further development. Herein, we demonstrate that neat with high mechanical strength electrical conductivity can...

In this paper, an improved pulse width modulation (PWM) method for chopper-cell (or half-bridge)based modular multilevel converters (MMCs) is proposed. This can generate output voltage with maximally 2N+1 (where N the number of submodules in upper or lower arm MMC) levels, which as great that carrier-phase-shifted PWM (CPSPWM) method. However, no phase-shifted carrier needed. Compared existing submodule unified modulated (SUPWM) method, level almost doubled and height step staircase reduced...

Carbon dots, generally defined as small carbon nanoparticles with various surface passivation schemes, have emerged a new class of quantum-dot-like nanomaterials, their optical properties and photocatalytic functions resembling those typically found in conventional nanoscale semiconductors. In this work, dots were evaluated for photoinduced bactericidal functions, the results suggesting that highly effective bacteria-killing visible-light illumination. fact, inhibition effect could be...

Morphology control represents an important strategy for the development of functional nanomaterials and has yet to be achieved in case promising lead-free double perovskite materials so far. In this work, high-quality Cs2AgBiX6 (X = Cl, Br, I) two-dimensional nanoplatelets were synthesized through a newly developed synthetic procedure. By analyzing optical, morphological, structural evolutions samples during synthesis, we elucidated that growth mechanism followed lateral process from...

The inorganic lead-free Cs2AgBiBr6 double perovskite structure is the promising development direction in solar cells (PSCs) to solve problem of instability APbX3 and lead toxicity. However, low short-circuit current power conversion efficiency (PCE) caused by crystallization greatly limit optoelectronic application. Herein, we adopt a simple strategy dope single-layered MXene nanosheets into titania (Ti3C2Tx@TiO2) as multifunctional electron transport layer for stable efficient PSCs....

Developing Type-I core/shell quantum dots is of great importance toward fabricating stable and sustainable photocatalysts. However, the application systems has been limited due to strongly confined photogenerated charges by energy barrier originating from wide-bandgap shell material. In this project, we found that through decoration Au satellite-type domains on surface CdS/ZnS dots, such an can be effectively overcome over 400-fold enhancement photocatalytic H2 evolution rate was achieved...

In this paper, a stable and highly efficient plasmonic photocatalyst, Ag@AgCl, with cube-like morphology, has been successfully prepared via simple hydrothermal method. Using methylene dichloride as chlorine source in the synthesis can efficiently control morphology of due to low release rate chloride ions. Scanning electron microscopy (SEM), X-ray powder diffraction (XRD), photoelectron spectroscopy (XPS) UV-vis diffuse reflectance spectra were used characterize obtained product. The...

A novel and facile process is reported for water-phase synthesis of high-quality graphene/TiO2 composite nanosheets (GTCN) on a large scale using TiCl3 as both reducing agent precursor.

The synthesis of graphene-semiconductor nanocomposites has attracted increasing attention due to their interesting optoelectronic properties. However the such nanocomposites, with decorated particles well dispersed on graphene, is still a great challenge. This work reports facile, one-step, solvothermal method for graphene-CdS and graphene-ZnS quantum dot directly from graphene oxide, CdS ZnS very nanosheets. Photoluminescence measurements showed that integration significantly decreases...

Abstract H ierarchically ordered mesocellular mesoporous silica materials (HMMS) were synthesized using a single structure‐directing agent. The pores are without adding any pore expander; the walls composed of SBA‐15 type mesopores. Small‐angle X‐ray scattering revealed presence uniform structures with two different sizes. Using HMMS as nanoscopic template, hierarchically carbon (HMMC) and polymer (HMMP) synthesized. was used host for enzyme immobilization. To improve retention enzymes in...

Nanoscale carbon particles have emerged as versatile precursors for a new class of highly fluorescent nanomaterials that resemble semiconductor quantum dots. The surface-passivated nanoparticles, dubbed 'carbon dots', were already demonstrated their potential optical bioimaging applications in vitro and vivo. In this study, we conducted systematic cytotoxicity evaluation on the dots prepared by various combinations precursor nanoparticles molecules particle surface functionalization. results...

The construction of reduced graphene oxide or with semiconductor has gained more and attention due to its unexpected optoelectronic electronic properties. synthesis (RGO) oxide-semiconductor nanocomposite well-dispersed decorated particles is still a challenge now. Herein, we demonstrate facile method for the oxide-amorphous TiO2 oxide-anatase nanocomposites particles. as-synthesized samples were characterized by transmission electron microscopy, X-ray diffraction, photoelectron...

Lead‐free and more air‐stable perovskite Cs 2 SnI 6 absorber with a direct bandgap of 1.48 eV is synthesized via modified solution process. Different nanostructured ZnO nanorod arrays as electron transport layers hole blocking are grown by controlling the seed layer used to fabricate mesoscopic solar cells light layer. The influences morphology on device photovoltaic performance were also investigated. With careful control length pore size ensure high loading absorber, we achieved power...