TY - JOUR ID - 87444 TI - Preparation and photocatalytic application of ternary Fe3O4/GQD/g-C3N4 heterostructure photocatalyst for RhB degradation. JO - Pollution JA - POLL LA - en SN - 2383-451X AU - Mirzaei, Hourieh AU - Ehsani, Mohammad Hossein AU - Shakeri, Alireza AU - Ganjali, Mohammad Reza AU - Badiei, Alireza AD - Department of Physics, Semnan University, Semnan, Iran AD - School of Chemistry, College of Science, University of Tehran, Tehran, Iran AD - Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran Y1 - 2022 PY - 2022 VL - 8 IS - 3 SP - 779 EP - 791 KW - Graphene quantum dots KW - G-C3N4 KW - RhB KW - Visible-light KW - Nanocomposites DO - 10.22059/poll.2022.331685.1202 N2 - Preparation of an efficient hybrid structure photocatalyst for photocatalytic decomposition has been considered a great option to develop renewable technologies for environmental remediation. Herein, ternary magnetic Fe3O4/GQD/g-C3N4 nanocomposite (FGC) was prepared using the ball mill method. Binary nanocomposites Fe3O4/g-C3N4 (F/CN) and GQD/g-C3N4 (G/CN) were prepared to compare photocatalytic activity with FGC. The performance of photocatalysts for degradation of rhodamine B (RhB) was studied. EDX results showed that Fe3O4, GQD and g-C3N4 nanoparticles (NPs) are uniformly distributed in the FGC. The FGC nanocomposite shows superparamagnetic behaviour with a saturation magnetization of 12 emu. g-1, which makes it favourable compound for magnetic separation procedure. Photocatalytic activity of FGC (100%) was much higher than those of the G/CN (88%) and F/CN (77%) photocatalysts. The superior activity of FGC compared to binary composites was attributed to broader absorption in the visible light band and greater suppression of electron-hole recombination. The photocatalytic degradation of RhB using FGC was consistent with pseudo-first-order kinetics. The reusability of FGC was examined for four runs and no noticeable decrease was observed with the same irradiation time for each run. Finally, it can be argued that FGC photocatalyst can be an efficient semiconductor for the degradation of organic dyes from wastewater. UR - https://jpoll.ut.ac.ir/article_87444.html L1 - https://jpoll.ut.ac.ir/article_87444_ed7d3183a1e8112377c8e889ba69fd0e.pdf ER -