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author:

Li, Guosheng (Li, Guosheng.) [1] | Hu, Zhuofeng (Hu, Zhuofeng.) [2]

Indexed by:

EI SCIE CSCD

Abstract:

Coupling two-dimention carbon materials like graphene on photodelectrode can achieve high-efficiency photoelectrochemical cells. Bottom-up synthesis of carbon-based two-dimensional materials in green media from simple molecules is very attractive but remains a challenge. Carbohydrate is an ideal precursor for the synthesis but previous report requires pyrolysis at high temperature (> 700 degrees C). Herein, starting with glucose, we develop a low temperature (210 degrees C) synthesis of carbonaceous nanosheets in aqueous solution of glucose. With the aid of ethylenediamine and Fe3+/Fe2+/Co2+/Ni2+ ions, the nanosheets can grow on hematite nanorod array with very close contact. Importantly, a metallic region is formed at the interface due to atom distribution distortion, which can promote the charge transfer. The activity can be greatly enhanced by about 500% due to fast charge transfer. This is much better than that prepared by physically or chemically mixing graphene and hematite (< 200%). The enhancement is mainly due to the deformation area between the nanosheets and the hematite. The effective hole diffusion length increases from 2 to 8 nm and lifetime of charge carrier also increases, as confirmed by ultrafast transient absorption spectra. This method provides more opportunity for simple, mild and cost-effective fabrication of carbon-based two-dimensional by bottom-up method.

Keyword:

bottom-up carbon hematite photocatalytic water oxidation two-dimensional

Community:

  • [ 1 ] [Hu, Zhuofeng]Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Peoples R China
  • [ 2 ] [Li, Guosheng]Zhaoqing Univ, Coll Environm & Chem Engn, Zhaoqing 526061, Peoples R China
  • [ 3 ] [Li, Guosheng]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China

Reprint 's Address:

  • [Hu, Zhuofeng]Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Peoples R China

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Source :

NANO RESEARCH

ISSN: 1998-0124

Year: 2021

Issue: 1

Volume: 15

Page: 627-636

1 0 . 2 6 9

JCR@2021

9 . 6 0 0

JCR@2023

ESI Discipline: PHYSICS;

ESI HC Threshold:87

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 4

SCOPUS Cited Count: 5

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 5

Online/Total:198/10019947
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