Size controlled nanographene oxides (NGOs; <50 nm) were prepared by a two-step oxidation process and NGOs self-assembled with TiO2 nanoparticles to form the core/shell structure. Nanosized GO-coated (NGOTs) then reduced photocatalytic under UV irradiation obtain graphene-coated TiO2. This is clearly different from typical graphene/TiO2 composite particles-on-a-sheet geometry first study on structure of its kind. The physicochemical properties NGOTs (r-NGOTs) characterized various analytical...

A new electrodeposition route was developed to prepare p-type CuFeO2 as a thin film-type electrode for use photocathode in solar water splitting cell. The resulting p-CuFeO2 film has bandgap energy of ca. 1.55 eV, with its conduction band edge located at more negative potential than the reduction water. Various photoelectrochemical properties were investigated, and hydrogen production 1 M NaOH solution confirmed by gas chromatography. incident photon-to-current conversion efficiency plot...

Electrochemical synthesis methods were developed to produce CuBi2O4, a promising p-type oxide for use in solar water splitting, as high surface area electrodes with uniform coverage. These involved electrodepositing nanoporous Cu/Bi films Cu:Bi ratio of 1:2 from dimethyl sulfoxide or ethylene glycol solutions, and thermally oxidizing them CuBi2O4 at 450 °C air. Ag-doped also prepared by adding trace amount Ag+ the plating medium codepositing Ag films. In ions substitutionally replaced Bi3+...

Photocatalytic CO2 conversion to fuel offers an exciting prospect for solar energy storage and transportation thereof. Several photocatalysts have been employed photoreduction; the challenge of realizing a low-cost, readily synthesized photocorrosion-stable photocatalytic material that absorbs successfully utilizes broad portion spectrum is as yet unmet. Herein, mesoporous p-type/n-type heterojunction material, Cu x O-TiO2 (x = 1, 2), via annealing Cu/Cu2O nanocomposites mixed with TiO2...

Mo-doped BiVO4 electrodes were prepared by an electrochemical route for use as photoanodes in a photoelectrochemical cell. The purpose of Mo-doping was to improve the electron transport properties, which turn can increase electron-hole separation yield. poor yield known be one main limiting factors BiVO4-based photoanodes. provided effective way doping BiVO4, and optimally doped sample, BiV(0.97)Mo(0.03)O4, increased from 0.23 0.57 at 0.6 V vs. RHE, is record high achieved As result,...

The major limitation to investigating a variety of ternary oxides for use in solar energy conversion is the lack synthesis methods prepare them as high-quality electrodes. In this study, we demonstrate that Bi-based n-type oxides, BiVO4, Bi2WO6, and Bi2Mo3O12, can be prepared polycrystalline electrodes by mild chemical thermal treatments electrodeposited dendritic Bi films. resulting oxide films have good coverage, adhesion, electrical continuity, allowing facile accurate evaluation these...

The hybrid of graphite oxide (GO)/TiO(2) was prepared through the spontaneous exfoliation bulky and reorganization with TiO(2) nanoparticles as a solar conversion hydrogen-generating photocatalyst. GO/TiO(2) showed enhanced activities for both photocurrent generation (in an electrode form) hydrogen production slurry than those bare under UV light irradiation. photocatalytic activity is ascribed to ability graphitic layers in accepting transporting electrons from excited TiO(2), promoting...

The development of visible-light-active photocatalysts is being investigated through various approaches. In this study, C(60)-based sensitized photocatalysis that works the charge transfer (CT) mechanism proposed and tested as a new approach. By employing water-soluble fullerol (C(60)(OH)(x)) instead C(60), we demonstrate adsorbed activates TiO(2) under visible-light irradiation "surface-complex CT" mechanism, which largely absent in C(60)/TiO(2) system. Although fullerene its derivatives...

The interparticle charge transfer within the agglomerates of TiO2 nanoparticles in slurries markedly enhanced dye-sensitized production H2 under visible light. By purposely decoupling light absorbing part Dye/TiO2 from active catalytic center Pt/TiO2, role bare working as a mediator that connects above two parts was investigated systematically. presence agglomerate facilitated separation and electron to Pt/TiO2 through multiple grain boundaries subsequently produced more hydrogen. reduction...

Titania nanoparticles sensitized with metal-free organic dye exhibit high visible-light activities for the redox conversion of water pollutants in a wider pH range comparison TiO(2) ruthenium bipyridyl complexes.

A novel design strategy is developed which demonstrates the synthesis of mesoporous p-type Cu₂ZnSnS₄(CZTS)/n-type TiO₂ heterojunction photocatalyst, with enhanced performance for its application in CO₂ photoreduction to hydrocarbon fuel, CH₄.

A series of dyes were synthesized to examine the roles hydrophilic characteristics R in sensitized hydrogen generation by dye-grafted Pt/TiO(2) under visible light irradiation. The hydrogen-generation efficiencies and optimum amounts grafted affected substantially steric effects R; moderately DEO1 DEO2 showed higher sensitization activity at a lower loading than hydrophobic D-H.

Patterned WO₃ microdisc arrays exhibit excellent photoelectrochemical performances, owing to enhanced light absorption and effective charge separation.

Investigation of molecular interactions in polymeric films is crucial for understanding and engineering multiscale physical phenomena correlated to device function performance, but this often involves a compromise between theoretical experimental data, because poor film uniformity. Here, we report the intramolecular intermolecular inside ultrathin conformal hybrid organic-inorganic alucone grown by layer deposition, based on sequential self-limiting surface reactions. Varying carbon chain...

The sustainability of conventional water- and energy-associated systems is being examined in terms water–energy nexus. This study presents a high-efficiency, off-grid solar desalination system for saline water (salinities 10 36 g L–1) that accompanies electrocatalytic oxidations chloride and, consequently, urine via oxidized chlorine species while concomitantly producing formate from captured CO2. A variable number cell arrays placed between double-layered nanoparticulate titania...

Interactions between cells and the extracellular matrix (ECM) alter cellular behaviors, including adhesion, migration, proliferation, differentiation via focal adhesions that link ECM to actin cytoskeleton as an...

We have investigated the chemical bonding character and physicochemical properties of mesoporous zinc oxide-layered titanate nanocomposites synthesized by an exfoliation−restacking route. According to our analyses using X-ray diffraction, high resolution transmission electron microscopy, N2 adsorption−desorption isotherm measurements, nanocrystalline oxides are stabilized not only in interlayer space host but also mesopores formed house-of-card type stacking crystallites. absorption...