Highly Efficient Photocatalysis and Photo Fenton‐Like Catalyst Degradation of Tetracycline and Rhodamine B Using Novel Porous Z‐Scheme WO3/g‐C3N4 of In Situ Synthesis

Abstract A Z‐scheme WO 3 /g‐C 3 N 4 heterojunction is fabricated by adopting melamine and ammonium tungstate as the precursor by calcination and a simple in situ growth method. The morphology, structure, optical properties, and degradation efficiency of Z‐scheme WO 3 /g‐C 3 N 4 heterojunctions are investigated in this paper. The photocatalytic experiments indicate that WO 3 /g‐C 3 N 4 (5 wt%) has the fastest degradation rate of tetracycline (TC) and rhodamine B (RhB) under light conditions. Furthermore, the properties of WO 3 /g‐C 3 N 4 (5 wt%) are also assessed according to the degradation velocity of RhB and TC by the photo Fenton‐like experiment, respectively within 30 min. A 96% RhB removal and a 76% TC removal are recorded after 30 min of photo Fenton‐like reaction, which has a big improvement of degradation velocity over photocatalytic experiments. During the calcination of ammonium tungstate, water vapor and ammonia gas are removed to promote the composition of porous structures of WO 3 /g‐C 3 N 4 , which is a remarkable contributor to enhancing the specific surface area and reactive activity sites. The porous structures obtained by calcination and Z‐scheme heterojunction constituted by the combination of g‐C 3 N 4 and WO 3 synergistically promote the improvement of photocatalytic activity.