Self‐Assembled 2D/2D Schottky Heterojunction of Ti₃C₂/UiO‐66 Nanosheets for Boosting Photocatalytic H₂ Evolution

Abstract

The construction of heterojunctions is usually considered as a common strategy to improve charge separation and transfer during the photocatalytic hydrogen evolution reaction (HER) process. Originating from the surficial electrical characteristic of Ti3C2 nanosheets and 2D UiO‐66, a novel 2D/2D Ti3C2/UiO‐66 composite is facilely constructed by the electrostatic self‐assembly process for HER. Higher photocatalytic HER efficiency (265.2 μmol h−1 g−1) is achieved for 2D/2D composites compared to both, pristine 3D UiO‐66 (15.89 μmol h−1 g−1) and 2D UiO‐66 (30.2 μmol h−1 g−1), respectively. The formation of a 2D/2D Ti3C2/UiO‐66 Schottky junction is beneficial for photoinduced electron–hole separation and charge transfer. More exposed active sites stemming from the maintained 2D morphology are simultaneously induced, which is also preferable for HER. Experimental and theoretical analysis reveals the prominent performance attributed to effective charge separation and accelerated electron migration from 2D UiO‐66 to Ti3C2 nanosheets with higher electrochemcial active surface area. Herein, a new route for the construction of efficient photocatalytic systems is provided.

Visible‐Light‐Induced Photocatalytic Hydrogen Evolution Performance of Graphdiyne‐Alkyne Phosphating Mo–Metal‐Organic Frameworks Heterojunction

“…This suggested that there is a strong coupling effect at the interface between GDY and PMF. [ 23 ] Figure 2b shows the XRD test results of GDY. As shown in Figure 2b, the characteristic peak of GDY appears at 22°, which corresponds to the (002) crystal plane of the amorphous carbon material.…”

Ti3C2‐modified g‐C3N4/MoSe2S‐Scheme Heterojunction with Full‐Spectrum Response for CO2Photoreduction to CO and CH4

“…[42] For Ti 3 C 2 , the formation of Schottky with other semiconductor materials and the generation of an internal electric field can improve carrier separation, effectively improving the photocatalytic efficiency. [43,44] Due to its good structural stability, hydrophilicity, metal conductivity, low Fermi level and abundant active centers, as a new and cheap non-noble metal cocatalyst, it has been widely used in CO2 photoreduction. [45] Therefore, TI 3 C 2 was chosen as the cocatalyst of g-C 3 N 4 /MoSe 2 .…”

The Linkage‐Moderated Covalent Organic Frameworks with C=N and NN on Charge Transfer Kinetics Towards the Robust Photocatalytic Hydrogen Activity

“…[1][2][3][4] One of the main challenges is how to ensure efficient charge separation to achieve active sites for photocatalytic hydrogen reaction evolution. So far, many strategies including reasonably designing photocatalysts via elemental doping or defect engineering, [5][6][7] introducing single-atom catalysts (SACs) [8,9] or constructing heterojunctions, [10,11] have already been proposed. mobility, while strong electron affinition could hinder the charge transfer process.…”