A new S-scheme heterojunction of 1D ZnGa2O4/ZnO nanofiber for efficient photocatalytic degradation of TC-HCl

One-dimensional shaped ZnGa2O4, ZnO and ZnGa2O4/ZnO nanofibers were successfully prepared by electrostatic spinning technique and the photocatalytic degradation performance of tetracycline hydrochloride (TC-HCl) were studied. It was found that the S-scheme heterojunction formed in the ZnGa2O4/ZnO could greatly reduce the recombination of the photogenerated carriers and therefore improve the photocatalytic performance. By optimizing the ratio of the ZnGa2O4 and ZnO, the largest degradation rate could reach 0.0573 min-1, which was 20 times of the self-degradation rate of TC-HCl. It was verified that the h+ played the key role in the reactive groups for the high performance decomposition of TC-HCl by capture experiments. This work provides a new method for the highly efficient photocatalytic degradation of TC-HCl.

Automated summary

One-dimensional shaped ZnGa2O4, ZnO, and ZnGa2O4/ZnO nanofibers were prepared using the electrostatic spinning technique. The photocatalytic degradation performance of tetracycline hydrochloride (TC-HCl) was studied, and it was found that the S-scheme heterojunction formed in ZnGa2O4/ZnO significantly improved the photocatalytic performance. By optimizing the ratio of ZnGa2O4 and ZnO, the degradation rate of TC-HCl reached 0.0573 min-1, which was 20 times higher than its self-degradation rate. Capture experiments confirmed the crucial role of h+ in the efficient decomposition of TC-HCl. This work provides a new method for highly efficient photocatalytic degradation of TC-HCl.