Edge effect-modulated exciton dissociation and charge transfer in porous ultrathin tubular graphitic carbon nitride for boosting photoredox activity

Abstract

Metal-free graphitic carbon nitride (CN) is one of promising semiconductor candidates for photocatalytic application, but most only shows moderate activity, owing to the fast recombination of photoinduced electron-hole pairs from...

Doping with Niobium Nanoparticles as an Approach to Increase the Power Conversion Efficiency of P3HT:PCBM Polymer Solar Cells

“…In addition, heterogeneous nucleation of the P3HT crystallites occurs at the substrate interface, leading to a considerable reorientation of the P3HT crystallites. The P3HT lamellae and π–π stacking direction are preferentially aligned parallel to the substrate in melt-crystallized P3HT [ 46 ]. We observe that the exposure of the P3HT:PCBM layer to Nb doping considerably alters the layer’s shape.…”

Band-structure tunability via the modulation of excitons in semiconductor nanostructures: manifestation in photocatalytic fuel generation

“…Xing et al 82 proposed edge grafting in porous ultrathin tubular graphitic carbon nitride (TCN) using L-cysteine (Lc), which can dissociate excitons into free electrons and holes as well as accelerate charge transfer from g-C 3 N 4 (CN) to the active sites (i.e., edge effect). The presence of carboxyl groups in Lc and the hydrolysis of melamine into the supramolecular precursors resulted in further stacking in the vertical direction into a 1-D rod-like structure (Fig.…”

“…Xing et al 82 proposed edge grafting in porous ultrathin tubular graphitic carbon nitride (TCN) using l -cysteine ( l c), which can dissociate excitons into free electrons and holes as well as accelerate charge transfer from g-C 3 N 4 (CN) to the active sites ( i.e. , edge effect).…”

Pt-Doped Biomass Carbon Decorated with MoS2 Nanosheets as an Electrocatalyst for Hydrogen Evolution

“…The overconsumption of non-renewable fossil energy such as coal and oil has resulted in serious environmental problems. − Against the backdrop of goal of carbon peaking and carbon neutrality, the renewable and clean energy such as solar energy, hydrogen, wind energy, and so on has developed rapidly. − Hydrogen, as a kind of low-carbon, clean, and sustainable energy, has been regarded as an alternative to fossil fuels. − Electrocatalytic overall water splitting is considered an efficient technology to produce hydrogen owing to its clean and sustainability. − Water electrolysis process has two half reactions: hydrogen evolution reaction (HER) and oxygen evolution reaction. , However, the high overpotential and sluggish kinetics limit the development of HER, which influences the efficiency of electrocatalytic overall water splitting. It is necessary to develop an efficient hydrogen evolution catalyst to improve the efficiency of HER. − …”