Abstract The core-shell Ag2CO3@g-C3N4 photocatalyst was prepared by coating two-dimensional nanosheet g-C3N4 on the surface of Ag2CO3, which could substantial improve the photo-degradation for MO (methyl orange), and the Ag2CO3@g-C3N4 (5 wt%) composite exhibited the best degradation efficiency, up to 96.7%. Meanwhile, the composites also have great degradation properties for MB (methylene blue), RhB (Rhodamine B) and phenol, the enhanced photocatalytic performance was due to the faster photogenerated carrier migration efficiency derived from core-shell structure and chemical bond hybridization effect arising from Ag2CO3 and g-C3N4. In addition, the Ag2CO3@g-C3N4 photocatalyst has great stability for MO degradation and the activity remains at 87.3% after five cycles, due to the Z-scheme structure formed by the Ag2CO3@g-C3N4 photoacatalyst, which effectively avoids the accumulation of photoinduced electrons in the Ag2CO3 and inhibits Ag+ photoreduction, which greatly improves the stability of Ag2CO3. This Ag2CO3@g-C3N4 core-shell photocatalyst with Z-scheme system not only promotes the photodegradability of Ag2CO3, but ensures its stability performance, which providing new ideas for designing new high-efficiency photocatalytic materials.

中文翻译：

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Z-scheme Ag2CO3@g-C3N4核壳结构增加光诱导电荷分离和稳定光催化降解

摘要 通过在 Ag2CO3 表面包覆二维纳米片 g-C3N4 制备核壳型 Ag2CO3@g-C3N4 光催化剂，可显着改善 MO（甲基橙）的光降解，Ag2CO3@g-C3N4 (5 wt%) 复合材料表现出最好的降解效率，高达 96.7%。同时，复合材料对MB（亚甲蓝）、RhB（罗丹明B）和苯酚也有很好的降解性能，增强的光催化性能是由于核壳结构和化学键杂化效应产生的更快的光生载流子迁移效率。 Ag2CO3 和 g-C3N4。此外，由于Ag2CO3@g-C3N4光催化剂形成的Z型结构，Ag2CO3@g-C3N4光催化剂对MO降解具有很好的稳定性，5个循环后活性保持在87.3%，有效避免了Ag2CO3中光生电子的积累，抑制了Ag+的光还原，大大提高了Ag2CO3的稳定性。这种具有Z-scheme体系的Ag2CO3@g-C3N4核壳光催化剂不仅促进了Ag2CO3的光降解性，而且保证了其稳定性能，为设计新型高效光催化材料提供了新思路。