Abstract
A series of AgVO3@ZIF(Zn, Co) samples were solvothermally prepared, and further evaluated as the photocatalysts for photodegradation of organic pollutants. The inherent characteristics of the as-synthesized composites were determined by some techniques such as XRD, SEM, TG-DTG, XPS, UV-Vis, ESR, and N2-adsorption. Interestingly, the component of the composite constructed with mass ratio of 3:1 (AgVO3@BZIF-3) showed the highest catalytic performance for the degradation of methylene blue (MB). This may be related to the formation of type II heterojunction between AgVO3 and bimetallic ZIF(Zn, Co), which results in MB molecules to be easily adsorbed and degraded on AgVO3@BZIF-3. The results of DFT calculations suggested that the newly-formed O-N bonds linking ZIF structure and AgVO3 crystal surface could promote the charge carriers through the heterostructure interface easily. Moreover, the highest photodegradation efficiency of MB was achieved with 98.20 % when the reaction system was carried out at pH of 5, 3 h and 25 °C in the presence of photocatalyst mass of 30 mg. In addition, various substrates including methyl orange, indole, rofloxacin, methyl blue and tetracycline were respectively investigated under the optimal reaction conditions. Moreover, combined with ESR analysis and free radical capture experiments, superoxide radicals (O2−) was confirmed as the key active species for organic pollutant photodegradation over AgVO3@BZIF-3.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.