Reducing carbon dioxide to hydrocarbon fuel with solar energy is significant for high-density storage and balance. In this work, single atoms of palladium platinum supported on graphitic nitride (g-C3N4), i.e., Pd/g-C3N4 Pt/g-C3N4, respectively, acting as photocatalysts CO2 reduction were investigated by density functional theory calculations the first time. During reduction, individual metal function active sites, while g-C3N4 provides source hydrogen (H*) from evolution reaction. The...

Studies of the optical properties and catalytic capabilities noble metal nanoparticles (NPs), such as gold (Au) silver (Ag), have formed basis for very recent fast expansion field green photocatalysis: photocatalysis utilizing visible ultraviolet light, a major part solar spectrum. The reason this growth is recognition that localised surface plasmon resonance (LSPR) effect Au NPs Ag can couple light flux to conduction electrons NPs, excited enhanced electric fields in close proximity...

A new efficient photocatalyst structure, a shell of anatase nanocrystals on the fibril core single TiO2(B) crystal, was obtained via two consecutive partial phase transition processes. In first stage process, titanate nanofibers reacted with dilute acid solution under moderate hydrothermal conditions, yielding fiber. subsequent heating converted into crystal while crystals in remained unchanged. The do not attach to randomly but coherently close crystallographic registry form stable...

The phase transition of single layer molybdenum disulfide (MoS2) from semiconducting 2H to metallic 1T and then 1T′ phases, the effect on hydrogen evolution reaction (HER) are investigated within this work by density functional theory. Experimentally, 2H-MoS2 has been widely used as an excellent electrode for HER can get charged easily. Here we find that negative charge a significant impact structural in MoS2 monolayer. thermodynamic stability 1T-MoS2 increases with state, comparing...

Graphene has attracted considerable interest over recent years due to its intrinsic mechanical, thermal and electrical properties. Incorporation of small quantity graphene fillers into polymer can create novel nanocomposites with im- proved structural functional This review introduced the progress in fabrication, properties potential applications graphene-polymer composites. Recent research clearly confirmed that na-nocomposites are promising materials ranging from transportation, biomedical...

Abstract Direct photocatalytic CO 2 reduction from primary sources, such as flue gas and air, into fuels, is highly desired, but the thermodynamically favored O almost completely impedes this process. Herein, we report on efficacy of a composite photocatalyst prepared by hyper-crosslinking porphyrin-based polymers hollow TiO surface subsequent coordinating with Pd(II). Such exhibits high resistance against inhibition, leading to 12% conversion yield air after 2-h UV-visible light...

Finely control of product selectivity is an essential issue in organic chemical production. In the synthesis functionalized anilines via reduction corresponding nitroarenes, challenge to selectively reduce only nitro group presence other reducible functional groups nitroarene molecules at a high reaction rate. Normally, reduced stepwise through series intermediates that remain as byproducts, increasing aniline cost. Here we report alloying small amounts copper into gold nanoparticles can...

The effect of graphene oxide (GO) on the mechanical properties and curing reaction Diglycidyl Ether Bisphenol A/F Triethylenetetramine epoxy system was investigated. GO prepared by oxidation graphite flakes characterized spectroscopic microscopic techniques. Epoxy nanocomposites were fabricated with different loading solution mixing technique. It found that incorporation small amount into matrix significantly enhanced epoxy. In particular, model I fracture toughness increased nearly 50%...

State-of-the-art development of the controlled synthesis colloidal semiconductor nanocrystals has been discussed in this review article.

Direct hydrogenation of C=C double bonds is a basic transformation in organic chemistry which vanishing from simple practice because the need for pressurized hydrogen. Ammonia borane (AB) has emerged as hydrogen source through its safety and high content. However, conventional systems liberated high-cost AB cannot be fully utilized. Herein, we develop novel Pd/g-C3 N4 stabilized Pickering emulsion microreactor, alkenes are hydrogenated oil phase with originating water phase, catalysed by Pd...

Density functional theory calculations reveal that hybrid carbon nanodots and graphitic nitride can form a type-II van der Waals heterojunction, leading to significant reduction of band gap enhanced visible light response.

Well-shaped CuInS2 nanopyramids and nanodisks were synthesized by a wet-chemical method. The phase structure was controlled the coordination strength between solvent metal precursors. Zincblende obtained when copper iodide, indium acetate 1-dodecanethiol heated at 220 °C in 1-octadecene (ODE) or oleic acid (OA). When replaced oleylamine (OLA) trioctylphosphine oxide (TOPO), thermodynamically metastable wurtzite obtained. Interestingly, zincblende can also be OLA injecting into reaction...

Device instability has become an obstacle for the industrial application of organic-inorganic metal halide perovskite solar cells that already demonstrated over 23% laboratory power conversion efficiency (PCE). It been discovered sliding A-site cations in compound through and out three-dimensional [PbI6]4- crystal frame is one main reasons are responsible decomposition compound. Herein, we report effective method to enhance stability FA0.79MA0.16Cs0.05PbI2.5Br0.5 film incorporation...

Production of 2,5-furandicarboxylic acid (FDCA, a platform chemical for the industry in future) by selective aerobic oxidation 5-hydroxymethyl-furfural is crucial component to enable FDCA production from sugars. The challenge achieve high yield at low temperatures. Here, we report catalyst composed alloyed nanoparticles (containing 1.5 wt % Ag and Pd) supported on CeO2 nanofibers, which achieved an excellent (93%) 20 °C. Interesting observations include deterioration higher reaction...

Abstract 5-hydroxymethylfurfural (HMF) is a valuable and essential platform chemical for establishing sustainable, eco-friendly fine-chemical pharmaceutical industry based on biomass. The cost-effective production of HMF from abundant C6 sugars requires mild reaction temperatures efficient catalysts naturally materials. Herein, we report how fulvic acid forms complexes with Al 3+ ions that exhibit solar absorption photocatalytic activity glucose conversion to in one-pot reaction, good yield...

Three catalytic oxidation reactions have been studied: The ultraviolet (UV) light induced photocatalytic decomposition of the synthetic dye sulforhodamine B (SRB) in presence TiO(2) nanostructures water, together with two employing Au/TiO(2) nanostructure catalysts, namely, CO air and formaldehyde under visible irradiation. Four kinds nanotubes nanorods different phases compositions were prepared for this study, gold nanoparticle (Au-NP) catalysts supported on some these (to form catalysts)....

Abstract The synthesis of sodium hexatitanate from trititanate was characterized by Raman spectroscopy, X‐ray diffraction (XRD) and high‐resolution transmission electron microscopy (HRTEM). structural evolution to studied using spectra, XRD HRTEM techniques. It found that the bands at 279 cm −1 corresponding very long TiO bonds 883 short decrease in intensity finally disappear during transition hexatitanate. band 922 an intermediate‐length bond observed become stronger with increase...

Complex three-dimensional structures comprised of porous ZnO plates were synthesized in a controlled fashion by hydrothermal methods. Through subtle changes to reaction conditions, the could be self-assembled from 20 nm thick nanosheets into grass-like and flower-like which led exposure high proportions {0001} crystal facets for both these materials. The measured surface area grass, or platelet-like samples 72.8 52.4 m2∙g−1, respectively. Gas sensing results demonstrated that porous,...

We report a method for controlling the exposed facets and hence dimensionality shape of ZnO nanocrystals using non-hydrolytic aminolysis synthesis route. The effects changes to reaction conditions on formation were investigated possible self-assembly mechanisms proposed. crystal facet growth morphologies controlled by varying temperature reactant ratio. Four distinct nanocrystal types produced (nanocones, nanobullets, nanorods nanoplates). relative photocatalytic activities these...

Nb₂O₅microfibres with heterojunctions between amorphous and crystalline phases show improved photocatalytic activity in Nb₂O₅–benzylamine surface complex process.

A dual-redox-additive-enhanced Zn–Br₂ “supercapattery” is demonstrated with battery-level energy density and capacitor-level power density.