Abstract
In this research, the preparation of a Ag3PO4/g-C3N4@MoS2 photocatalyst and the performance and mechanism of degradation of 2-amino-4-acetaminoanisole (AMA) were studied. The phase composition and morphology of the synthesized samples were comprehensively characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet–visible diffuse reflectance (UV–Vis), and photoelectron spectroscopy (XPS). The catalytic performance of the photocatalyst was evaluated by the visible-light catalytic degradation of the AMA. The experimental results show that the Ag3PO4/g-C3N4@MoS2 composite photocatalyst has stronger photocatalytic oxidation and reduction capabilities than Ag3PO4 and Ag3PO4/g-C3N4. The material only decreases by 31.3% after five cycles of use, indicating that the material has good light stability. Free radical capture experiments prove that photo-generated holes (h+) and superoxide radicals (·O2−) are the main active substances in the photocatalytic process. The fundamental studies in the present research provide a new perspective for constructing an innovative type of visible-light photocatalyst and a new way to promote the photocatalytic degradation of organic pollutants.
Highlights
In particular, generate wastewaters containing a wide variety of recalcitrant organic pollutants such as phenol, benzene, anilines, and chlorophenols, etc
The morphologies of Ag3 PO4, g-C3 N4, MoS2, and Ag3 PO4 /g-C3 N4 @MoS2 were determined by scanning electron microscope (SEM) images (Figure 1)
The Ag3 PO4 /g-C3 N4 @MoS2 composites with different MoS2 contents were successfully synthesized by electrostatic self-assembly and ion-exchange methods
Summary
The treatment of industrial wastewaters is a historical challenge which is relevant and significant to the environment. In particular, generate wastewaters containing a wide variety of recalcitrant organic pollutants such as phenol, benzene, anilines, and chlorophenols, etc. Dyeing and printing processes are among the chemical processes that can generate various types of wastewaters respective to the intermediate dyes or printing materials in use [3,4]. The poor treatment of AMA-dyed wastestream could lead to serious water pollution [5]. Molybdenum disulfide (MoS2 ), as a catalyst, has tunable optical properties, a unique layered structure, and a large bandgap, and could be potentially applied in the degradation of organic pollutants [26–32], hydrogen release reactions (water decomposition), and CO2 reduction applications [33–35]. G-C3 N4 is a highly stable and environmentally friendly material, which can be used to decompose organic pollutants under visible light [37]. The study objectives are (1) to test the photocatalytic activity of as-synthesized materials by degrading AMA; (2) to determine the stability and photocorrosion resistance of materials through cycle experiments; and, (3) to propose possible photocatalytic degradation pathways and mechanisms
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
