Recent advances in g-C₃N₄-based photocatalysts incorporated by MXenes and their derivatives

Abstract

As one of fascinating visible-light-responsive photocatalysts, the two-dimensional (2D) graphitic carbon nitride (g-C3N4) has drawn broad attention in the field of solar energy conversion and environmental remediation. However, its intrinsic...

Engineering a surface defect-rich Ti3C2 quantum dots/mesoporous C3N4 hollow nanosphere Schottky junction for efficient N2 photofixation

“…6–10 Among them, the two-dimensional (2D) metal-free g-C 3 N 4 is a promising photocatalyst, and has attracted increasing attention owing to its ideal band structure, facile synthesis, low cost, physicochemical stability and nontoxicity. 11,12 Photocatalytic N 2 fixation over g-C 3 N 4 has been proven to be theoretically feasible, 13 nevertheless, bulk g-C 3 N 4 usually suffers from severe recombination of photogenerated electron–hole pairs and poor transfer rate of charge carriers, resulting in low N 2 photofixation efficiency. 14,15 In principle, N 2 photofixation is a multi-charge transfer process, which requires the accumulation of multiple electrons on the N 2 adsorption sites of the photocatalyst.…”

Efficient photocatalytic hydrogen evolution coupled with benzaldehyde production over 0D Cd0.5Zn0.5S/2D Ti3C2 Schottky heterojunction

“…Thus, it is urgent to find a new co-catalyst to replace them [28][29][30]. MXene is a kind of twodimensional (2D) materials with a general formula of M n+1 X n T x , where M, X, and T denote transition metals, C or N, and surface terminations involving -OH, -O, and -F, respectively [31][32][33][34][35][36]. Ti 3 C 2 , a typical MXene, has great potential in photocatalysis due to its high metallic conductivity and rich surface functional groups, which can enhance the separation of photogenerated carriers and increase the surface active sites [37][38][39][40][41].…”

First-Principles Study on the Half-Metallicity of New MXene Materials Nd2NT2 (T = OH, O, S, F, Cl, and Br)

“…M 2 N (M = Cr, Mo, W), which belongs to the VIB group in MXene materials ( Hou et al, 2021 ), has excellent properties whose surface functional groups can induce Cr 2 NO 2 to exhibit stable half-metallicity ( Wang, 2016 ). On the basis of the semimetal properties of VIB MXene materials reported thus far, this work explored the structural and electromagnetic properties of the lanthanide MXene material Nd 2 NT 2 (T = OH, O, S, F, Cl, and Br) to increase the known types of lanthanide MXene materials.…”