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...

Semiconductor photocatalysts have received much attention in recent years due to their great potentials for the development of renewable energy technologies, as well environmental protection and remediation. The effective harvesting solar suppression charge carrier recombination are two key aspects photocatalysis. formation heterostructured is a promising strategy improve photocatalytic activity, which superior that single component photocatalysts. This Feature Article concisely summarizes...

Green degradation: Organic contaminants such as volatile organic compounds and dyes (e.g. acetaldehyde methylene blue (MB)) can be photocatalytically degraded over a novel CaBi2O4 catalyst. The reaction is environmentally friendly (O2 oxidant) proceeds at room temperature under visible-light irradiation of wide-ranging wavelength (see picture: x=conversion CH3CHO into CO2, A=absorbance).

Semiconductor photocatalysts have attracted increased attention due to their great potential for solving energy and environmental problems. The formation of Z‐scheme photocatalytic systems that mimic natural photosynthesis is a promising strategy improve activity superior single component photocatalysts. connection between photosystem I (PS I) II II) are crucial constructing efficient using two PS II). present review concisely summarizes highlights recent state‐of‐the‐art accomplishments...

Photocatalytic reduction of CO2 into energy-rich carbon compounds has attracted increasing attention. However, it is still a challenge to selectively and effectively convert desirable reaction product. Herein, we report design synergistic photocatalyst for selective CO by using covalent organic framework bearing single Ni sites (Ni-TpBpy), in which electrons transfer from photosensitizer production the activated under visible-light irradiation. Ni-TpBpy exhibits an excellent activity, giving...

Single-crystalline Zn2GeO4 nanobelts with lengths of hundreds micrometers, thicknesses as small ∼7 nm, and aspect ratios up to 10 000 were synthesized in a binary ethylenediamine/water solvent system using solvothermal route. The ultralong ultrathin geometry the nanoribbon proves greatly promote photocatalytic activity toward reduction CO2 into renewable hydrocarbon fuel (CH4) presence water vapor.

Visible-light-responsive g-C3N4/NaNbO3 nanowires photocatalysts were fabricated by introducing polymeric g-C3N4 on NaNbO3 nanowires. The microscopic mechanisms of interface interaction, charge transfer and separation, as well the influence photocatalytic activity composite systematic investigated. high-resolution transmission electron microscopy (HR-TEM) revealed that an intimate between C3N4 formed in heterojunctions. performance was evaluated for CO2 reduction under visible-light...

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...

Organic-inorganic composite photocatalyst g-C(3)N(4)-TaON with visible-light response was prepared by a milling-heat treatment method. The characterized X-ray diffraction, high-resolution transmission electron microscopy and UV-vis diffuse reflection spectroscopy. activity of for photodegradation rhodamine B is higher than that either single-phase g-C(3)N(4) or TaON. obviously increased performance ascribed mainly to enhancement electron-hole separations both at the interface in semiconductors.

The electronic band structure of a semiconductor photocatalyst intrinsically controls its level conduction (CB) and valence (VB) and, thus, influences activity for different photocatalytic reactions. Here, we report simple bottom-up strategy to rationally tune the graphitic carbon nitride (g-C3N4). By incorporating electron-deficient pyromellitic dianhydride (PMDA) monomer into network g-C3N4, VB position can be largely decreased gives strong photooxidation capability. Consequently, modified...

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•−...

Recent developments in cadmium sulphide-based photocatalysts including heterojunctions, solid solutions and quantum dots for photocatalytic H₂ production are reviewed.

Cocatalysts have been extensively used to accelerate the rate of hydrogen evolution in semiconductor-based photocatalytic systems, but influence interface state between semiconductor and cocatalyst has rarely investigated. Here, we demonstrate a feasible strategy two-dimensional (2D) nanojuctions enhance solar generation MoS2/TiO2 system. Loading 2D MoS2 nanosheets on surface anatase TiO2 with exposed (001) facets greatly increases interfacial contact. At an optimal ratio 0.50 wt % MoS2,...

Abstract A novel, in situ simultaneous reduction‐hydrolysis technique (SRH) is developed for fabrication of TiO 2 ‐‐graphene hybrid nanosheets a binary ethylenediamine (En)/H O solvent. The SRH based on the mechanism reduction graphene oxide (GO) into by En and formation nanoparticles through hydrolysis titanium (IV) (ammonium lactato) dihydroxybis, subsequently loading onto chemical bonds (Ti–O–C bond) to form 2D sandwich‐like nanostructure. dispersion hinders collapse restacking exfoliated...

Abstract Robust hollow spheres consisting of molecular‐scale alternating titania (Ti 0.91 O 2 ) nanosheets and graphene (G) are successfully fabricated by a layer‐by‐layer assembly technique with polymer beads as sacrificial templates using microwave irradiation to simultaneously remove the template reduce oxide into graphene. The molecular scale, 2D contact Ti G in is distinctly different from prevenient G‐based TiO nanocomposites prepared simple integration nanosheets. nine times increase...

Ultrathin and uniform Bi(2)WO(6) square nanoplates of ∼9.5 nm thickness corresponding to six repeating cell units were prepared in the presence oleylamine using a hydrothermal route. The show great potential utilization visible light energy highly efficient reduction CO(2) into renewable hydrocarbon fuel. On one hand, ultrathin geometry promotes charge carriers move rapidly from interior surface participate photoreduction reaction. This should also favor improved separation photogenerated...