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Download fileUltrathin Two-Dimensional BiOCl with Oxygen Vacancies Anchored in Three-Dimensional Porous g‑C3N4 to Construct a Hierarchical Z‑Scheme Heterojunction for the Photocatalytic Degradation of NO
journal contribution
posted on 2021-12-27, 17:37 authored by Mengmeng Wang, Beibei Wang, Bingke Xie, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Dongyun Chen, Jianmei LuIn
this paper, we successfully designed a hierarchical Z-scheme
heterojunction with adjustable oxygen vacancy concentration, in which
ultrathin two-dimensional BiOCl nanosheets with oxygen vacancies (OVs)
were anchored on porous three-dimensional g-C3N4 spheres to obtain BiOCl-OVs/g-C3N4 spherical
composites. The synergistic effect of oxygen vacancies and Z-scheme
heterojunctions on composite BiOCl-OVs/g-C3N4 spheres increases the transmission rate of photogenerated carriers
and inhibits the recombination of electrons and holes. Meanwhile,
OVs are not only used as electronic media but also as the recombination
and storage centers of photogenerated carriers. The porous structure
of the three-dimensional spheres provides a larger specific surface
area and an open pore structure, which facilitates the circulation
and transfer of pollutant gases. The above characteristics give BiOCl-OVs/g-C3N4 spheres excellent performance in degrading NO
under visible light, at rates of up to 66.5%. In addition, cycle experiments
and X-ray diffraction (XRD) indicate that the material also has excellent
stability and recyclability.
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open pore structurecharacteristics give biocl4 sub3 subdimensional biocl nanosheetsspheres excellent performancedimensional spheres providesoxygen vacancies anchoredoxygen vacanciesdimensional bioclporous structureexcellent stabilityobtain bioclcomposite bioclspheres increasesvisible lightultrathin twotransmission ratesynergistic effectsuccessfully designedstorage centersspherical compositesscheme heterojunctionsscheme heterojunctionray diffractionpollutant gasesphotogenerated carriersphotocatalytic degradationelectronic mediadimensional gcycle experiments5 %.