首页|Boosted visible-light photocatalytic performance of Au/BiOCl/BiOI by high-speed spatial electron transfer channel
Boosted visible-light photocatalytic performance of Au/BiOCl/BiOI by high-speed spatial electron transfer channel
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NSTL
Elsevier
To improve the visible-light photocatalytic performance of BiOI, it is extremely desired to boost charge transfer and separation. Herein, a novel ternary Au/BiOCl/BiOI photocatalyst with enhanced separation efficiency and prolonged lifetime of photogenerated carrier was successfully in-situ prepared via a facile thermal reduction method. The Au nanoparticles uniformly distributed on BiOI and BiOCl acted as an electron-bridge, which could promote the transfer of electron from BiOI to BiOCl, forming a high-speed spatial electron transfer channel. In addition, BiOCl provided a high-energy-level platform to prolong charge lifetime by receiving high-energy electrons of BiOI to alleviate the relaxation to the valence band and recombination with the holes on the valence band. The synergistic effect of Au and BiOCl largely improved the separation efficiency of BiOI photogenerated carrier, ultimately the photocatalytic performances of Au/BiOCl/BiOI nanocomposites for RhB degradation in static system (97%) and dynamic system (85.52%) and NO removal (65.4%) were enhanced by 1.52, 1.71 and 1.32 times compared to BiOI, respectively. Thus, this work can provide new insights into understanding the important role of electron-bridge in accelerating electron transfer and designing the suitable high-energy-level platform to prolong charge lifetime.
Au electron-bridgeEnhanced separationHigh-energy-level platformNOx removalProlonged lifetime
MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices College of Materials Science and Engineering Guilin University of
Analytical & Testing Center Jinan University
School of Environment Guangdong Key Laboratory of Environmental Pollution and Health Jinan University
NSTL
Elsevier
