Abstract The electrostatic induced self-assembly method is successfully applied to prepare core-shell hierarchical structure of BiOI/OMCMB (Oxidized mesocarbon microbead) composites (MB), in which BiOI nanosheets were uniformly immobilized on the surface of OMCMB. The low-priced graphite carbon OMCMB played a crucial role in inducing and assembling the core-shell structure of the MB composites, which not only effectively improved the conductivity of the catalyst, but also enhanced the stability of BiOI in the catalytic process. The photocatalytic degradation of tetracycline hydrochloride (TH) revealed that the hierarchical structure of OMCMB and BiOI promoted the photogenerated charge separation, and enhanced the photocatalytic performance of BiOI. And sample MB-3 had the highest photocatalytic performance with TH degradation of 96.8 % under the visible-light irradiation for 60 min. MB-3 remains favorable photocatalytic activity after four cycles. Moreover, based on the related optical and electrical characterization analysis, a possible photocatalytic mechanism about MB composites was proposed tentatively.

中文翻译：

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BiOI/氧化中间相碳微珠核壳复合材料的可控自组装：一种新型分层结构促进光催化活性

摘要 静电诱导自组装方法成功地用于制备BiOI/OMCMB（氧化中间相碳微珠）复合材料（MB）的核壳分层结构，其中BiOI纳米片均匀固定在OMCMB表面。低价石墨碳OMMCB在诱导和组装MB复合材料的核壳结构方面发挥了至关重要的作用，不仅有效提高了催化剂的电导率，而且增强了BiOI在催化过程中的稳定性。四环素盐酸盐（TH）的光催化降解表明OMMCB和BiOI的分级结构促进了光生电荷分离，增强了BiOI的光催化性能。样品 MB-3 具有最高的光催化性能，TH 降解为 96。8 % 在可见光照射下 60 分钟。MB-3 在四次循环后仍保持良好的光催化活性。此外，基于相关的光学和电学表征分析，初步提出了 MB 复合材料可能的光催化机理。