Enhanced performance and recyclability for peroxymonosulfate activation via controlling the different morphologies of g-C3N4

Abstract

This article aims to analysis high photocatalytic/PMS activation synergy ability of graphitic carbon nitride (g-C3N4) by improving the carriers transfer efficiency and reducing energy band based on controlling the morphology of materials. In this study, tubular g-C3N4 (TCN) with porous structure was prepared by an acid-induced-assembly step and the photocatalysis/PMS activation effects were discussed. Compared with bulk g-C3N4 (BCN), TCN could exhibit enhanced visible light absorption, effectively inhibit electrons and holes recombination in the system, which significantly improved PMS-assisted visible light catalytic efficiency. 97.15 % Rhodamine B (RhB) and 62.3 % Tetracycline (TC) degradation were achieved within 60 min. In addition, the synergistic effect of PMS activation and TCN photocatalysis has a broad pH application range, which is very beneficial for application in practical aqueous systems. Quenching experiments showed that the synergistic effect of photocatalysis/PMS activation on TCN principally the cause of formating 1O2. Based on the intermediate products detected by liquid chromatography-mass spectrometry (LC-MS) technology, a possible photodegradation pathway of TC was proposed. This paper provides an original perspective to improve carriers transfer and reduce energy band due to conduct the morphology g-C3N4, which could further broaden the applications in the field of environmental governance.