Conjugated polymer dots/graphitic carbon nitride nanosheet heterojunctions for metal-free hydrogen evolution photocatalysis

Abstract

Pdot/g-C3N4 heterojunctions exhibit an HER of 929.3 μmol h−1 g−1 and AQE of 5.7% at 420 nm without a metallic catalyst.

Recent Advances in Visible‐Light‐Driven Hydrogen Evolution from Water using Polymer Photocatalysts

“…Recently, Chen and coworkers reported heterojunctionbased photocatalysts consisting of polyfluorene Pdots that were easily coupled with g-C 3 N 4 nanosheets to improve the HER and photocatalytic function. [94] Notably, F8T2 Pdots/g-C 3 N 4 showed a high HER of 0.929 mmol h À 1 g À 1 with an excellent AQY of 5.7 % at 420 nm under visible light in a TEA solution under metal-free conditions. Their theoretical calculation results clearly indicated hole-electron transfer within the heterojunctions of the F8T2 Pdots and g-C 3 N 4 ( Figure 10); thus, the reduction of H + to H 2 in the sacrificial donor solution was improved significantly.…”

“…Recently, Chen and coworkers reported heterojunction‐based photocatalysts consisting of polyfluorene Pdots that were easily coupled with g‐C 3 N 4 nanosheets to improve the HER and photocatalytic function . Notably, F8T2 Pdots/g‐C 3 N 4 showed a high HER of 0.929 mmol h −1 g −1 with an excellent AQY of 5.7 % at 420 nm under visible light in a TEA solution under metal‐free conditions.…”

“…HOMO and LUMO distribution of F8T2 and CNUS calculated using density functional theory. Reproduced with permission from ref [94]. copyright Royal Society of Chemistry 2019.…”

A nine-fold enhancement of visible-light photocatalytic hydrogen production of g-C3N4 with TCNQ by forming a conjugated structure

“…The conjugative p-electron structures of polymer hybridized photocatalysts exhibit elevated photoactivity because of rapid photogenerated charger transfer. [19][20][21] Although conjugated polymers have been demonstrated to form polymer/C 3 N 4 heterojunctions, [22][23][24][25][26][27][28][29][30] there are few researches which have applied TCNQ on pure g-C 3 N 4 for hydrogen generation utilizing water splitting with visible light.…”

Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

“…In recent years, in addition to graphene, two-dimensional nanomaterials, such as hexagonal boron nitride (h-BN) [11][12][13][14][15][16], molybdenum disul de (MoS 2 ) [17][18][19][20] and black phosphorus [21] (Figure 1), have also been developed, which has greatly expanded the properties and applications of two-dimensional materials in this realm. Notably, two-dimensional materials and their derivatives have been extensively studied as photocatalysts [22,23], sensors [24], drug delivery vehicles [25], transistors [26], lithium ion batteries [27], water treatment agents [28], ion exchange [29], fuel cells [30], nano ltration membranes [31], conductive inks [32], quantum dots [33], adsorbents [34] and supercapacitors [35]. Moreover, two-dimensional nanomaterials/polymer composites have also been investigated.…”