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A Biotemplating Route for the Synthesis of Hierarchical Fe 2 O 3 with Highly Dispersed Carbon as Electron‐Transfer Channel
Author(s) -
Yang Zhao,
Kang Jianxin,
Li Lidong,
Guo Lin
Publication year - 2020
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201900641
Subject(s) - calcination , carbon fibers , composite number , materials science , photocatalysis , electron transfer , photodegradation , chemical engineering , nanoparticle , ion , reaction rate constant , nanotechnology , catalysis , composite material , chemistry , kinetics , organic chemistry , physics , quantum mechanics , engineering
Although the preparation of carbon composites has made great progress, the construction of systems comprising uniformly dispersed carbon as a framework to link active constituents still remains a challenge. Herein, a hierarchical Fe 2 O 3 /C composite was synthesized in a one‐step biotemplating route, where agarose was firstly reacted with Fe 3+ and Ca 2+ ions, which resulted in a competitive interaction between these ions and the hydroxy groups, then partly calcined to achieve the final product that consisted of α‐Fe 2 O 3 nanoparticles embedded in highly dispersed carbon. The carbon within the composite acts as an efficient photoelectron transfer channel to improve conductivity during photocatalysis. The hierarchical Fe 2 O 3 /C composite exhibited a photodegradation rate constant (k) of 0.091 min −1 , more than four times that of α‐Fe 2 O 3 (0.020 min −1 ).