Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 227, Issue -, Pages 530-540Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.01.069
Keywords
Environmental remediation; Internal electric field; Oxygen-doped carbon nitride; Layered double hydroxide; Heterostructure
Funding
- Singapore Ministry of Education Academic Research Funds [MOE2014-T2-2-074, ARC16/15, 2015-T1-001-023, RG7/15]
- GSK (GlaxoSmithKline) - EDB (Economic Development Board) Trust Fund
- Joint Singapore-Germany Research Project Fund [SGP-PROG3-019]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51521006]
- Key Project of National Nature Science Foundation of China [51739004]
- Projects of the National Nature Science Foundation of China [21776066, 51708195]
Ask authors/readers for more resources
Semiconductor heterojunctions, widely applied in photocatalytic solar-to-chemical energy conversion, are advantageous for spatially separating photogenerated charge across the heterojunction boundary, inhibiting carrier recombination processes and synergistically accelerating photocatalytic reaction beyond individual components. Herein, a novel type of 2D-2D heterostructure consisting of oxygen-doped carbon nitride (OCN) and ultrathin CoAl-layered double hydroxide (CoAl-LDH) with the aid of hydrogen bonding has been constructed via in situ growth method. The visible-light photocatalytic degradation efficiency of the hybridized photocatalyst is 38 and 239 folds higher than that of pure OCN and pure COAL-LDH, respectively. This is due to the strong electronic coupling effect in the heterostructured interface, which induces photogenerated charge transfer from CoAl-LDH to OCN and make for the constrction of an interfacial internal electric field (IIEF) between CoAl-LDH and OCN. Based on the experimental evidence and density functional theory calculations, an IIEF-induced direct Z-scheme charge transfer mechanism has been proposed to enhance the extraction and utilization of photoinduced electron and hole in respectively CoAl-LDH and OCN. This work uncovers the nature of charge transfer system based on a 2D-2D heterostructured system, which can be potentially employed in various fields of photocatalysis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available