A novel Z-scheme Ag₂CO₃-NG heterojunction photocatalyst by employing N-doped graphene (NG) was successfully synthesized with enhanced photocatalytic activity for microcystin-LR (MC-LR) degradation. Characterization results suggested that doping of N can promote the nucleation and crystallization of Ag₂CO₃. Photocatalytic tests showed that Ag₂CO₃-NG with 30 wt.% N-participation (AGON/1–30) showed the best photocatalytic performance under visible-light irradiation, which could remove MC-LR in 7.5 min, superior to Ag₂CO₃-GO composite. Multiple factors including dosage, pH value, MC-LR concentration, H₂O₂, and the coexistence of Microcystis aeruginosa were studied to reveal the environmental impact on MC-LR degradation. Results showed that ·OH, ·O₂⁻, as well as ·CO₃⁻ were the main ROSs in MC-LR degradation. The excellent reusability and stability of AGON/1–30 were proved through five consecutive cycles of degradation. Therefore, the Z-scheme Ag₂CO₃-NG heterojunction photocatalyst is a promising technique for MC-LR remediation.

利用N掺杂的石墨烯（NG）成功合成了新型的Z型Ag ₂ CO ₃ -NG异质结光催化剂，其光催化活性增强了对微囊藻毒素-LR的降解。表征结果表明，掺杂N可以促进Ag ₂ CO ₃的成核和结晶。光催化测试表明，N参与量为30 wt。％的Ag ₂ CO ₃ -NG（AGON / 1-30）在可见光照射下表现出最佳的光催化性能，可以在7.5分钟内去除MC-LR，优于Ag ₂ CO ₃ -GO复合材料。多种因素包括剂量，pH值，MC-LR浓度，H ₂ O₂，并研究了铜绿微囊藻的共存，以揭示环境对MC-LR降解的影响。结果表明，·OH，·O2 ₂ ^- ，以及·CO ₃ ^-为主要ROSS在MC-LR降解。通过连续五个降解周期证明了AGON / 1–30具有出色的可重复使用性和稳定性。因此，Z方案Ag ₂ CO ₃ -NG异质结光催化剂是一种有前途的MC-LR修复技术。