Harnessing solar energy for the production of clean hydrogen fuels by a photoelectrochemical (PEC) cell represents very attractive but challenging alternative. This review focuses on recent developments some promising photoelectrode materials, such as BiVO4, a-Fe2O3, TaON, and Ta3N5 production. Some strategies have been developed to improve PEC performances including: (i) doping enhancing visible light absorption in wide bandgap semiconductor or promoting charge transport narrow...

Hydrogen is a very promising candidate as future energy carrier. It attractive to produce hydrogen from solar and seawater, the most abundant renewable source natural resource on earth. To date, there no report stable photoelectrode with high incident photon conversion efficiency (IPCE) in seawater splitting under irradiation by visible light. Herein, we an efficient system for based multi-metal oxide BiVO4 after modification. The results indicated that modified had photocurrent density of...

Visible light-induced degradation of rhodamine B (RhB) and eosin Y (EO) in a heterogeneous TiO2 P-25/EO/RhB system was investigated the present work. The results showed that photodegradation RhB is enhanced significantly when EO introduced into P-25/RhB system. Under optimal conditions (50 mg P-25, 20 L−1 EO), (4 L−1) almost decomposed completely after 35 min visible light irradiation, though photodegraded simultaneously. possible mechanism studied by examination active species HO•, O2•−...

Monoclinic clinobisvanite bismuth vanadate is an important material with wide applications. However, its electronic structure and optical properties are still not thoroughly understood. Density functional theory calculations were adopted in the present work, to comprehend band structure, density of states, projected wave function BiVO(4). In particular, we put more emphasis upon intrinsic relationship between properties. Based on calculated results, molecular-orbital bonding was proposed....

The development of efficient photocatalytic material for converting solar energy to hydrogen as viable alternatives fossil-fuel technologies is expected revolutionize shortage and environment issues. However, date, the low quantum yield production over photocatalysts has hindered advances in practical applications photocatalysis. Here, we show that a carbon nitride intercalation compound (CNIC) synthesized by simple molten salt route an polymer photocatalyst with high yield. We found...

In this study, 3D-photonic crystal design was utilized to enhance incident photon-to-electron conversion efficiency (IPCE) of WO3 photoanodes. Large-area and high-quality photonic photoanodes with inverse opal structure were prepared. The stop-bands these tuned experimentally by variation the pore size structures. It found that when red-edge stop-band opals overlapped electronic absorption edge at Eg = 2.6–2.8 eV, a maximum 100% increase in photocurrent intensity observed under visible light...

We present a surface corrosion method to shift the photocurrent onset potential cathodically for water oxidation on Ti4+ doped Fe2O3 by about 100 mV. After treatment, hematite photoanodes showed similar lowest values obtained loading with electrocatalysts or depositing functional over-layers. Moreover, cathodic of was preserved well even after long operating time. The results indicated effectiveness this simple treatment. In order make clear reason shift, samples before and were investigated...

Surface exfoliation: A Ta3N5 photoanode prepared by a thermal oxidation and nitridation method shows high solar photocurrent. This photocurrent is currently the highest achieved photoanode. The obtained mainly because of facile mechanical exfoliation surface passivation layer (see picture). As service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or typeset....

Abstract Despite the fact that Ta 3 N 5 absorbs a major fraction of visible spectrum, rapid decrease photocurrent encountered in water photoelectrolysis over time remains serious hurdle for practical application photoelectrodes. Here, by employing Co O 4 nanoparticle oxidation catalyst (WOC) as well an alkaline electrolyte, photostability electrode is significantly improved. /Ta photoanode exhibits best durability against photocorrosion to date, when compared with Co(OH) x and IrO 2...

Inspired by the rapid development of metal-organic-framework-derived materials in various applications, a facile synthetic strategy was developed for fabrication 3D hierarchical nanoarchitectures. A surface-mounted metal-organic framework membrane pyrolyzed at range temperatures to produce catalysts with excellent trifunctional electrocatalytic efficiencies oxygen reduction, hydrogen evolution, and evolution reactions.

In this study, we summarize a series of typical 2D nanomaterials for photocatalytic CO₂conversion. Furthermore, based on the characteristics materials and current status research CO₂reduction, challenges opportunities as prospective photocatalysts CO₂reduction will also be discussed.

The sustainable production of chemicals and fuels from abundant solar energy renewable carbon sources provides a promising route to reduce climate-changing CO2 emissions our dependence on fossil resources. Here, we demonstrate solar-powered formate readily available biomass wastes feedstocks via photoelectrochemistry. Non-precious NiOOH/α-Fe2O3 Bi/GaN/Si wafer were used as photoanode photocathode, respectively. Concurrent photoanodic oxidation photocathodic reduction towards with high...

Hydrogen peroxide (H2O2) molecules play important roles in many green chemical reactions. However, the high activation energy limits their application efficiency, and there is still huge controversy about path of H2O2 over presence *OOH intermediates. Here, we confirmed formation key species heterogeneous system, via situ shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS), isotope labeling, theoretical calculation. In addition, found that compared with *H2O2, was more...

Light-driven primary amine oxidation to imines integrated with H2 production presents a promising means simultaneous of high-value-added fine chemicals and clean fuels. Yet, the effectiveness this strategy is generally limited by poor charge separation photocatalysts uncontrolled hydrogenation secondary amines. Herein, spatial decoupling proposed isolate redox chemistry at distinct sites photocatalysts, CoP core–ZnIn2S4 shell (CoP@ZnIn2S4) coaxial nanorods are assembled as proof-of-concept...

High-yield synthesis of millimetre-long, semiconducting nanotubular g-C(3)N(4) with aspect ratio higher than 10,000 and strong photoluminscence emission was reported. The formation process the nanotube based on one-dimensional fibrous self-assembly protonated melamine in glycol mediated nitric acid aqueous solution, which subsequently thermalyzed into tubular carbon nitride through a rolling-up mechanism. synthesized exhibits intense luminescent emission, fast photoresponse, reproducible...

The surface pretreatment by electrochemical cyclic voltammetry (CV) in the dark was found to remarkably enhance photocurrent of Mo-doped BiVO4 from front side illumination. variation samples before and after investigated scanning electron microscopy, X-ray photoelectron spectroscopy, Mott–Schottky methods. results showed that enhancement came both removal recombination center, including Mo6+ ions, reoxidation reduced species. part ions can be reoxidized air. However, dissolution kept at high...

With a theoretical maximum photocurrent of ca. 12.5 mA cm −2 under AM 1.5 G 100 mW irradiation, the presently achieved plateau about 0.6 on bare LaTiO 2 N photoanodes indicates presence serious charge transport limitations. Only recently, 4 was precious IrO modified prepared by rather expensive and complex method, without discussing intrinsic mechanism improved photocurrents. In this study, establishing highly crystalline porous particles superior inter‐particle connectivity with reduced...

Using a sol–gel hydrothermal method, we have synthesized Cr-doped SrTiO3 with high specific surface area (19.3–65.4 m2 g−1, depending on the temperature). X-ray diffraction (XRD), UV-Vis diffuse reflectance spectra, transmission electron microscopy (TEM) and photoelectron spectroscopy (XPS) were used to investigate SrTiO3. XRD analysis showed that exhibited good crystallinity crystalline size calculated using Scherrer equation is about 20–30 nm. spectra Cr doping can extend absorption edge...

Facilitated by TiO2 particles absorbing La3+ in hydrosol, La-doped was prepared a sol-hydrothermal method. Electron paramagnetic resonance and Brunauer−Emmett−Teller (BET) surface area analysis showed that the obtained anatase provided higher density of oxygen vacancies without change BET area. A theoretical calculation carried out to explain generation mechanism increased vacancies. The results (101) tends engender photoelectric conversion efficiency dye-sensitized solar cells fabricated...

NaNbO3 rods modified by In2O3 nanoparticles (In2O3/NaNbO3) were successfully synthesized an improved coprecipitation method, and they found to be advantageous for photocatalytic H2 evolution under visible light irradiation pure water splitting ultraviolet irradiation. The composites characterized X-ray diffraction, UV−vis diffuse reflectance spectrometry, Brunauer−Emmett−Teller measurement, scanning electron microscopy, energy-dispersive transmission microscopy. With use of the...

Single-crystalline hexagonal prism Zn(2)GeO(4) nanorods with different aspect ratios have been prepared via a solution phase route, which exhibits improved photocatalytic activities in overall water splitting and photoreduction of CO(2) due to the low crystal defects, high specific surface area beneficial microstructure on catalyst's surface.