Boosting interfacial charge separation of Ba5Nb4O15/g-C3N4 photocatalysts by 2D/2D nanojunction towards efficient visible-light driven H2 generation

By Kai Wang, Yuan Li, Jun Li, Gaoke Zhang. 2020

204 citations recorded by the source corpus.

Abstract To efficiently facilitate the charge transfer by constructing heterojunction photocatalysts is a promising strategy for improving solar-driven hydrogen generation. Herein, a novel 2D/2D nanojunction architecture of Ba5Nb4O15/g-C3N4 photocatalysts with powerful interfacial charge transfer are rationally designed. Advanced electron microscopy analysis elucidates the layered hexagonal nanosheets were coupled on the surface of ultrathin g-C3N4 forming a 2D/2D nanojunction. More importantly, such characterizations and theoretical calculations together illustrate that a strong interfacial charge transfer existed between the g-C3N4 layer and Ba-O layer of the Ba5Nb4O15 nanosheets, which fostered the efficient transfer and provided more massive reactive centers for photocatalytic hydrogen evolution. The unique 2D/2D structure in Ba5Nb4O15/g-C3N4 heterojunction leads to generate numerous charge transfer nanochannels, and which could accelerate the interfacial charge separation efficiency to a great extent. Ba5Nb4O15/g-C3N4 (1:20) sample displayed a remarkable photocatalytic H2 evolution rate (2.67 mmol h−1 g−1) in oxalic acid solution, nearly 2.35 times higher than that of single g-C3N4 under visible light and exhibits an outstanding photostability even after four cycles. This work would provide a new insight for the design of 2D/2D heterojunction photocatalyst with efficient interfacial charge transfer and separation for solar-to-H2 conversion.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/66515297ac85d47b37750b557bd9746e9fd4a1a3

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

  1. Dongnv Jin
  2. Gao-Jie Jiao
  3. Xinze Li
  4. Xiaohong Chen
  5. Qiong Liu
  6. Jiliang Ma
  7. Yancong Li
  8. Yanzhu Guo

Citations in the corpus