Visible light induced efficient hydrogen production through semiconductor–conductor–semiconductor (S–C–S) interfaces formed between g-C₃N₄ and rGO/Fe₂O₃ core–shell composites

Abstract

The type II heterojunction g-C3N4/rGO/Fe2O3 photocatalyst prepared by hydrothermal and wet impregnation methods for H2 production via water splitting.

Optically and Electrocatalytically Decoupled Si Photocathodes with a Porous Carbon Nitride Catalyst for Nitrogen Reduction with Over 61.8% Faradaic Efficiency

“…The bonding interactions and oxidation states of bare CN and Au/PCN were investigated by X‐ray photoelectron spectroscopy (XPS). As shown in Figure 2j, the binding energy peaks located at 398.2, 398.9, 399.8, and 400.8 eV correspond to sp 2 hybridized CNC, tertiary N (N(C) 3 ), CNH, and CN bonds of bare CN, [ 38 ] respectively. Markedly, Au/PCN displayed the same binding energies pattern with a shift toward high energy, indicating the successful loading of Au on PCN inducing the local electron density variation in PCN, leading to the donation of electrons from PCN to Au.…”

Ultrasonication-assisted liquid-phase exfoliation enhances photoelectrochemical performance in α-Fe2O3/MoS2 photoanode

“…However, bare α-Fe 2 O 3 has some limitations in terms of PEC performance, including fast electron-hole recombination, short hole diffusion length (typically 2–4 nm), and low conductivity [2] , [21] , [22] , [23] . Various methods can be used to overcome these drawbacks, such as the application of doping elements to improve electron transport [24] the inclusion of a heterojunction with other semiconductors to enhance charge separation [25] , [26] , [27] , [28] , [29] the use of nanostructures to generate more electron–hole pairs, the addition of co-catalysts on the surface to promote charge migration, and other methods to control morphology [30] , [31] , [32] . The p–n junction between a p-type and an n-type semiconductor can enhance the efficiency of the photoanode by not only decreasing the charge recombination rate but also improving the electron–hole separation.…”

In Situ Corrosion Fabrication of NaNbO3/Nb3O7F Heterojunctions with Optimized Band Realignment for Enhanced Photocatalytic Hydrogen Evolution

“…The carrier separation and charge transfer behaviors were further investigated by using transient photocurrent and EIS measurements. Usually, a higher photocurrent response indicates higher carrier separation efficiency, and smaller diameter of the Nyquist semicircle plot means smaller interfacial resistance and faster charge transfer [37, 38] . As seen in Figure 8 d, the photocurrent response of the NNO/NOF heterojunctions is higher than that of pure NNO, but lower than that of pure NOF.…”