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Direct Z‐Scheme Structure g ‐C 3 N 4 ‐BiOI with Highly Efficient Visible‐Light‐Driven Photocatalytic Activity for Bacteria Inactivation
Author(s) -
Chen Cuirong R.,
Wang Xiaodong D.,
Wang Shilin L.,
Zhang Jinlong L.,
Tian Baozhu Z.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003942
Subject(s) - photocatalysis , oxidizing agent , visible spectrum , photoluminescence , photocurrent , absorption (acoustics) , materials science , irradiation , photochemistry , dielectric spectroscopy , electrochemistry , absorption spectroscopy , chemistry , nuclear chemistry , optoelectronics , catalysis , optics , electrode , physics , organic chemistry , nuclear physics , composite material
A series of direct Z‐scheme g ‐C 3 N 4 ‐BiOI photocatalysts with different BiOI contents were constructed by in‐situ depositing BiOI nanoplates on the surface of g ‐C 3 N 4 nanosheets. Light absorption results indicated that the introduction of BiOI can improve the visible‐light absorption of g ‐C 3 N 4 . By analyzing the transient photocurrent responses, electrochemical impedance and photoluminescence (PL) emission spectra, it was disclosed that g ‐C 3 N 4 ‐BiOI Z‐scheme structure not only decreases the recombination rate of photogenerated charge carriers but also remains the electrons with higher reduction ability and holes with higher oxidizing ability. The results of photocatalytic disinfection of Escherichia coli ( E. coli ) under visible light irradiation indicated that g ‐C 3 N 4 ‐BiOI exhibits dramatically enhanced photocatalytic activity when compared to single g ‐C 3 N 4 and BiOI. And the optimal loading amount of BiOI corresponding to the highest photocatalytic performance of g ‐C 3 N 4 ‐BiOI is 20 %. In addition, the radical trapping experiments indicated that . O 2 − and h + are the main reactive species responsible for the disinfection of E. coli .

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