Construction of a rod-like Bi(2)O(4)modified porous g-C(3)N(4)nanosheets heterojunction photocatalyst for the degradation of tetracycline

摘要

The solar-powered semiconductor photocatalytic technology for pollutant degradation has been widely studied for its potential to alleviate the current environmental crisis. Here, a novel Bi2O4/g-C(3)N(4)heterojunction photocatalyst was successfully synthesizedviaintegrating high-temperature calcination with a hydrothermal method. The as-prepared Bi2O4/g-C(3)N(4)showed a superior degradation efficiency of about 95% for degrading tetracycline (TC), much higher than that of pure g-C3N4. The enhanced degradation performance derived from the porous structure of g-C(3)N(4)can provide a larger specific surface area and more abundant reaction sites. Moreover, the heterojunction structure between Bi(2)O(4)and g-C(3)N(4)can improve the separation efficiency of electron-hole pairs. Furthermore, the morphology, crystalline property, physicochemical properties and surface area of Bi2O4/g-C(3)N(4)were investigatedviaa series of characterizations. The mechanism of photocatalytic degradation is discussed by capture experiments and ESR detection. This study describes the synthesis of a heterojunction system for improving the photocatalytic performance of g-C3N4.