AgI/Bi₅O₇I plate composite was fabricated at room temperature by the phase transition and morphological transformation of BiOI microspheres. The orange BiOI microsphere was transferred to light yellow AgI/Bi₅O₇I plate by the addition of NaOH and AgNO₃ to the system. The formation process and possible transformation mechanism of AgI/Bi₅O₇I plate were detected and are discussed. The visible light absorption area of AgI/Bi₅O₇I extended to 667 nm and photo-excited electrons migrated from Bi₅O₇I to AgI to effectively inhibit the recombination of photo-generated carriers in the Z-scheme AgI/Bi₅O₇I plate. As a result, the photocatalytic ability of AgI/Bi₅O₇I plate increased by a factor of 21.9 than that of pure Bi₅O₇I and a factor of 45.7 than that of pure AgI under visible light irradiation. This study provides a facile fabrication of Z-scheme visible light photocatalysts with high performance and a method for designing semiconductor photocatalysts with controllable morphology.

中文翻译：

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在室温下通过BiOI微球的相变和形态转变制备具有高可见光光催化性能 的Z型AgI / Bi ₅ O ₇ I板†

通过BiOI微球的相变和形变，在室温下制备了AgI / Bi ₅ O ₇ I平板复合材料。通过向系统中添加NaOH和AgNO ₃，将橙色的BiOI微球转移到浅黄色的AgI / Bi ₅ O ₇ I板上。检测并讨论了AgI / Bi ₅ O ₇ I板的形成过程和可能的转变机理。AgI / Bi ₅ O ₇ I的可见光吸收面积扩展至667 nm，光激发电子从Bi ₅ O ₇迁移I至AgI可有效抑制Z方案AgI / Bi ₅ O ₇ I板中光生载流子的重组。结果，在可见光照射下，AgI / Bi ₅ O ₇ I板的光催化能力比纯Bi ₅ O ₇ I的光催化能力提高了21.9倍，比纯AgI的光催化能力提高了45.7倍。这项研究提供了一种高性能的Z方案可见光光催化剂的简便制造方法，以及一种可控制形态的半导体光催化剂的设计方法。