Directed holey and ordered g-C₃N_4.5 nanosheets by a hard template nanocasting approach for sustainable visible-light hydrogen evolution with prominent quantum efficiency

Abstract

<p>Ordered honeycomb-like mesoporous carbon nitride nanosheets with excess nitrogen (g-C₃N_4.5) were developed, which afford exclusive photocatalytic H₂ evolution from water.</p>

Incorporating NiCoP Cocatalyst into Hollow Rings of ZnCo-Metal–Organic Frameworks to Deliver Pt Cocatalyst like Visible Light Driven Hydrogen Evolution Activity

“…The AQY values at different wavelengths for these photocatalysts were also calculated and are listed in Table S2. Among the previously reported materials with noble and non-noble cocatalysts including g-C 3 N 4 , metal sulfides, metal phosphides, metal oxides, hybrid or nanocomposite materials, etc., the current study presents the highest photocatalytic H 2 evolution activity and corresponding AQY which are compared in Table S3, thus presenting the state-of-the-art improvement in the field. ,,,− This comparison also tells that our NCP@ZCM is exhibiting photocatalytic H 2 evolution activity similar or comparable to those of precious metal cocatalyst loaded photocatalysts. Further, to elucidate the stability of the NCP@ZCM photocatalyst, we conducted the recyclability study by running the reaction six times for 18 h (Figure d).…”

“…The photocatalytic performance of a semiconductor photocatalyst has been significantly improved by the integration of a cocatalyst in conjunction with the particular semiconductor photocatalyst. − Introducing a cocatalyst can significantly reduce the overpotential for water reduction and improve the H 2 production rate. Precious metals are well-known efficient cocatalysts, but the natural scarcity and higher cost limit their use in industrial applications for H 2 production .…”

Copolymerization synthesis of highly hydrophilic carbon nitride for efficient solar hydrogen production

“…S5, † the N 2 adsorption-desorption isotherms for all the samples showed classical type IV characteristics, which indicated the existence of a mesoporous structure. 44,45 The specic surface area of PCNInd 0.15 was calculated to be 41.44 m 2 g −1 , which was smaller than that of PCN (78.60 m 2 g −1 ), as conrmed by the results of AFM.…”

One-Dimensional Multichannel g-C3N4.7 Nanostructure Realizing an Efficient Photocatalytic Hydrogen Evolution Reaction and Its Theoretical Investigations

“…These amine groups also act as a shallow electron donor whose free electron lone pairs also effectively and additionally contributed to the reduction of H + to H 2 as seen under the Computational Procedure section. 19,52 Here, more electron density is transferred to the CB of MDY from the −NH x groups as the Fermi level of the amine group is believed to lie above (more negative than) the CB of g-C 3 N 4.7 based on our current band structure experiment and reported electronic structure of liquid ammonia 53 and amine-doped graphene, 54,55 and as shown in Figure 4e (from DFT). Similar characteristics are seen in the electronic band structure of the NH 3 molecule adsorbed (ex situ doping) on a Si nanowire host material, which yields ntype doping, where the Fermi level of NH 3 found pinned near the CB of the host material.…”