Abstract A novel Z-scheme AgI/Bi3O4Cl composite was fabricated through solvothermal-calcination method followed by an in-situ deposition process. The AgI/Bi3O4Cl composites exhibited improved photocatalytic activity for degrading rhodamine B (RhB) and tetracycline (TC) in comparison with pristine Bi3O4Cl and AgI under simulated sunlight irradiation. Specifically, BAI-3 composite (mass content of 30% of AgI) showed the highest removal efficiency of RhB and TC. And the degradation rate constants (k) of RhB over BAI-3 was 0.038 min−1, which was 25.3 and 3.8 times than that of pristine Bi3O4Cl (0.0015 min−1) and AgI (0.01 min−1), respectively. The photoelectrochemistry measurements and photoluminescence (PL) spectra manifested that the recombination of photogenerated electrons and holes in AgI/Bi3O4Cl composite was suppressed evidently because of the construction of AgI/Bi3O4Cl heterojunction. Radicals trapping experiments and electron spin resonance (ESR) test showed that ·O2− and h+ were the main reactive species. Combined with the analysis of band structures, a Z-scheme charge transfer mechanism of AgI/Bi3O4Cl composite was confirmed.

中文翻译：

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AgI 纳米粒子装饰的 Bi3O4Cl 微球：一种用于降解罗丹明 B 和四环素的高效 Z 型异质结光催化剂

摘要 通过溶剂热煅烧法和原位沉积工艺制备了一种新型 Z 型 AgI/Bi3O4Cl 复合材料。在模拟阳光照射下，与原始 Bi3O4Cl 和 AgI 相比，AgI/Bi3O4Cl 复合材料在降解罗丹明 B（RhB）和四环素（TC）方面表现出更高的光催化活性。具体而言，BAI-3 复合材料（AgI 的质量含量为 30%）显示出最高的 RhB 和 TC 去除效率。RhB 在 BAI-3 上的降解速率常数 (k) 为 0.038 min-1，分别是原始 Bi3O4Cl (0.0015 min-1) 和 AgI (0.01 min-1) 的 25.3 倍和 3.8 倍。光电化学测量和光致发光 (PL) 光谱表明，AgI/Bi3O4Cl 异质结的构建明显抑制了 AgI/Bi3O4Cl 复合材料中光生电子和空穴的复合。自由基捕获实验和电子自旋共振(ESR)测试表明·O2-和h+是主要的反应物种。结合能带结构分析，证实了AgI/Bi3O4Cl复合材料的Z型电荷转移机制。