Abstract Zn2GeO4 nanosheets/MIL-125(Ti) composites were successfully prepared via a facile two-step solvothermal route, and the phase structures were studied in detail. The as-obtained Zn2GeO4 nanosheets/MIL-125(Ti) composites exhibited remarkable photocatalytic activity and excellent cycle stability for the degradation of RhB 6G dye molecules under a 300 W Xenon lamp light emitting UV and visible radiation over 300−700 nm. It was found that 100 mL of 10 mg L−1 RhB 6G can be completely degraded over 50 mg of Zn2GeO4 nanosheets/MIL-125(Ti) photocatalyst within 90 min, and the degradation efficiency keep invariable after 4 cycles. MIL-125(Ti) endows the photocatalysts enhanced UV–vis light adsorption capability, while the Zn2GeO4 nanosheet with relatively high surface area can effectively improve the charge transfer process of generated holes and pairs. Finally, the potential photocatalytic mechanism of photocatalysis of RhB 6G involved in the photoactive electrons and holes transfer was further discussed.

中文翻译：

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用 MIL-125(Ti) 杂化光催化剂制备 Zn2GeO4 纳米片以改善有机污染物的光降解

摘要 通过简便的两步溶剂热法成功制备了Zn2GeO4纳米片/MIL-125(Ti)复合材料，并对其相结构进行了详细研究。所获得的 Zn2GeO4 纳米片/MIL-125(Ti) 复合材料在 300 W 氙气灯下发射超过 300-700 nm 的紫外线和可见光辐射时，对 RhB 6G 染料分子的降解表现出显着的光催化活性和优异的循环稳定性。结果表明，100 mL 10 mg L-1 RhB 6G 可以在 50 mg Zn2GeO4 纳米片/MIL-125(Ti) 光催化剂上在 90 分钟内完全降解，并且降解效率在 4 个循环后保持不变。MIL-125(Ti) 赋予光催化剂增强的紫外-可见光吸附能力，而具有较高表面积的Zn2GeO4纳米片可以有效改善产生的空穴和对的电荷转移过程。最后，进一步讨论了参与光活性电子和空穴转移的 RhB 6G 光催化的潜在光催化机制。