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In Situ Synthesis of All-Solid-State Z-Scheme BiOBr0.3I0.7/Ag/AgI Photocatalysts with Enhanced Photocatalytic Activity Under Visible Light Irradiation.

ABSTRACT: A series of novel visible light driven all-solid-state Z-scheme BiOBr0.3I0.7/Ag/AgI photocatalysts were synthesized by facile in situ precipitation and photo-reduction methods. Under visible light irradiation, the BiOBr0.3I0.7/Ag/AgI samples exhibited enhanced photocatalytic activity compared to BiOBr0.3I0.7 and AgI in the degradation of methyl orange (MO). The optimal ratio of added elemental Ag was 15%, which degraded 89% of MO within 20 min. The enhanced photocatalytic activity of BiOBr0.3I0.7/Ag/AgI can be ascribed to the efficient separation of photo-generated electron-hole pairs through a Z-scheme charge-carrier migration pathway, in which Ag nanoparticles act as electron mediators. The mechanism study indicated that ·O2- and h+ are active radicals for photocatalytic degradation and that a small amount of ·OH also participates in the photocatalytic degradation process.

SUBMITTER: Lu J 

PROVIDER: S-EPMC6246750 | biostudies-other | 2018 Nov

REPOSITORIES: biostudies-other

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In Situ Synthesis of All-Solid-State Z-Scheme BiOBr<sub>0.3</sub>I<sub>0.7</sub>/Ag/AgI Photocatalysts with Enhanced Photocatalytic Activity Under Visible Light Irradiation.

Lu Junlin J   Shang Chaoqun C   Meng Qingguo Q   Lv Haiqin H   Chen Zhihong Z   Liao Hua H   Li Ming M   Zhang Yongguang Y   Jin Mingliang M   Yuan Mingzhe M   Wang Xin X   Zhou Guofu G  

Nanoscale research letters 20181120 1

A series of novel visible light driven all-solid-state Z-scheme BiOBr<sub>0.3</sub>I<sub>0.7</sub>/Ag/AgI photocatalysts were synthesized by facile in situ precipitation and photo-reduction methods. Under visible light irradiation, the BiOBr<sub>0.3</sub>I<sub>0.7</sub>/Ag/AgI samples exhibited enhanced photocatalytic activity compared to BiOBr<sub>0.3</sub>I<sub>0.7</sub> and AgI in the degradation of methyl orange (MO). The optimal ratio of added elemental Ag was 15%, which degraded 89% of MO  ...[more]

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