Abstract Cross‐linked rather than non‐covalently bonded graphitic carbon nitride (g‐C 3 N 4 )/reduced graphene oxide (rGO) nanocomposites with tunable band structures have been successfully fabricated by thermal treatment of a mixture cyanamide and different weight ratios. The experimental results indicate that compared to pure g‐C , the CN/rGO show narrowed bandgaps an increased in rGO ratio. Furthermore, structure can be readily tuned simply controlling ratio rGO. It is found appropriate...

The organic-inorganic hybrid perovskite CH3NH3PbI3 is a novel light harvester, which can greatly improve the solar-conversion efficiency of dye-sensitized solar cells. In this article, first-principle theoretical study performed using local, semi-local and non-local exchange-correlation approximations to find suitable method for material. Our results, optB86b + vdWDF functional, excellently agree with experimental data. Thus, consideration weak van der Waals interactions demonstrated be...

A facile self-sponsored doping approach is developed to synthesize S and N co-doped trimodal-porous structured graphitic carbon network electrocatalysts. It utilizes a sole precursor (1-allyl-2-thiourea) realize precisely controlled co-doping of during concurrent growth process by simple control the pyrolysis temperature. The results reveal that effect heavily dependent on density maximal catalytic activity could only be achieved with an optimal level. presence macro-pore structure in...

Anatase TiO2 microspheres with exposed mirror-like plane {001} facets were successfully synthesized via a facile hydrothermal process. The photoanode composed of microsphere top layer shows an improved DSSCs efficiency owing to the superior light scattering effect and excellent reflecting ability facets.

In this work, we integrated Ag3PO4 with Bi4Ti3O12 to form Bi4Ti3O12/Ag3PO4 heterojunction nanocomposites by an ion-exchange method. The as-prepared composites were systematically characterized means of XRD, SEM, TEM, BET, XPS, UV-vis DRS, EIS, PL spectroscopy, and photocurrent response. XPS results demonstrate the creation obvious interfacial interaction between Ag3PO4. spectra, EIS responses reveal that display enhanced separation efficiency photogenerated electron-hole pairs, which is due...

The carbon nanotube (CNT)-sub-micrometer-sized anatase TiO₂ sphere composite photocatalysts were synthesized by a facile one-step hydrothermal method using titanium tetrafluoride as source and CNTs structure regulator. Various technologies including X-ray diffraction, UV-visible absorption spectra, N₂ adsorption-desorption, scanning electron microscopy, transmission microscopy employed to characterize the properties of prepared photocatalysts. results indicated that consisted wrapping around...

A selective etching phenomenon on {001} faceted anatase TiO(2) single crystal surfaces by HF and associated mechanism are reported. Density functional theory (DFT) calculations reveal that stabilizes the grown facets at low concentrations, but selectively destroys high concentrations.

Hydrogen bonding (H-bond) interactions have been regarded as a topic of vital scientific research in areas ranging from inorganic to biological chemistry. However, the application and elucidation surface H-bond functionalized photocatalysts alteration character photocatalyst itself not paid sufficient attention. Here we show high efficiency visible-light-driven photocatalytic H2 production, achieved by using H-bonding network decorated g-C3N4 photocatalyst. The hydrated was designed...

This work reports a facile hydrothermal approach to directly grow anatase TiO(2) crystals with exposed {001} facets on titanium foil substrate by controlling pH of HF solution. The mechanistic role for control growth the crystal facet has been investigated. results demonstrate that solution controls extent surface fluorination TiO(2), hence size, shape, morphology, and faceted area crystals. theoretical calculations reveal can merely occur via dissociative adsorption molecules under acidic...

We present a facile vapor-phase hydrothermal approach for direct growth of vertically aligned titanate nanotubes on titanium foil substrate. The resultant display external diameters 50-80 nm and walls with an average thickness 10 that consist more than layers. This is in strong contrast to the obtained from alkaline liquid-phase methods, which are generally smaller 12 diameter have consisting less five Importantly, investigation confirmed under conditions, were formed via distinctive...

Hydrothermal growth of high crystallinity Nb3O7(OH) single crystal nanorod film onto FTO substrate is directly used as the photoanode for DSSCs without calcination. The resultant possess an impressive overall efficiency 6.77%, highest among all reported assembled by niobium oxide-based photoanodes. Detailed facts importance to specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted authors. Please...

The controlled fabrication of metal oxide nanocrystals with exposed high-index facets has drawn enormous research attention. In this article, we have synthesized single-crystalline α-Fe2O3 crystals bound by six {104} using a simple hydrothermal method. formation mechanism the unique crystal structure been systematically studied, revealing that are formed through an aggregation–phase transformation–recrystallization mechanism. More importantly, demonstrated highly advantageous for high...

Ultrathin MoS2 nanostructured films with a surface exposed layered nanosheet structure were successfully grown onto fluorine-doped tin oxide (FTO) conducting substrates by facile one-pot hydrothermal method. After calcination at 400 °C in argon, the resulting directly used as counter electrodes (CEs) for dye-sensitised solar cells (DSSCs), exhibiting excellent DSSC performance. The reaction temperature and molar ratio of precursors found to have significant influence on MoS2, thus DSSCs It...

In this work, vertically aligned nanorod-like rutile TiO2 single crystal nanowire bundles were directly grown onto FTO conducting substrates via a facile, one-pot hydrothermal method. The fabricated display diameter range of 150–200 nm and mean length 0.9 μm. assemble by individual nanowires 5–7 in diameter. photoanode made shows excellent photoelectrocatalytic activity towards water oxidation, which is almost 3 times higher than that the anatase nanotube film similar thickness. high mainly...

The development of analytical methods for rapidly, sensitively, and selectively detecting iodide (I–) in aqueous media is critically important because I– closely related to human health a number diseases caused by the deficiency radioactivity I–. In this work, we describe N-doped carbon quantum dots as fluorophores direct determination fluorescence, achieving detection limit 10 μM with an linear range up 2.0 mM. experimental results also demonstrate that dot possess high selectivity...

Organic/inorganic hybrid perovskite materials are highly attractive for dye-sensitized solar cells as demonstrated by their rapid advances in energy conversion efficiency. In this work, the structures, energetics, and electronic properties a range of stoichiometric surfaces orthorhombic CH3NH3PbI3 theoretically studied using density functional theory. Various possible spatially constitutionally isomeric considered diversifying spatial orientations connectivities surface Pb–I bonds. The...

Abstract Anatase TiO 2 microspheres with controlled surface morphologies and exposed crystal facets were directly synthesized on metal titanium foil substrates by means of a facile, one‐pot hydrothermal method without use any templating reagent. The obtained products characterized using X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), photoelecron spectroscopy (XPS), the focused ion beam (FIB) technique. sizes resultant ranged from 1.1 to 2.1 μm....

Hydrothermally synthesised single crystal NiS nanosheets with an exposed (0001) surface exhibited a light conversion efficiency of 8.62% as electrocatalyst for dye-sensitised solar cells (DSSCs), significantly higher than that Pt-based DSSCs (7.36%). The theoretical calculations revealed the superior catalytic activity owing to existence sulfur vacancies.

Abstract Fluorine‐doped hierarchical porous single‐crystal rutile TiO 2 nanorods have been synthesized through a silica template method, in which F − ions acts as both n‐type dopants and capping agents to make the isotropic growth of nanorods. The combination high crystallinity, abundant surface reactive sites, large porosity, improved electronic conductivity leads an excellent photoelectrochemical activity. photoanode made F‐doped single crystals displays remarkably enhanced...

In this work, we report a facile and nontoxic one-pot hydrothermal method for synthesizing F-doped rutile single crystalline TiO2 with tuneable solar absorption. The optical band gap of the catalyst can be easily manipulated from 3.05 to 2.58 eV via altering initial F : Ti molar ratio reaction precursors. photoanodes made crystals appropriate F-doping concentration show excellent photoelectrocatalytic activity towards water oxidation under ultraviolet visible light illumination. best...