Facile synthesis and comparative study of the enhanced photocatalytic degradation of two selected dyes by TiO 2 -g-C 3 N 4 composite.

Autor: Alothman AA; Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia., Ayub A; Institute of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan. asif.chemist45@gmail.com., Hachim SK; Medical Laboratory Techniques Department, Al-Farahidi University, Baghdad, Iraq., Mohammed BM; Engineering Department, Mazaya University College, Nasiriyah, Dhi Qar, Iraq., Hussain F; Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan., Altaf M; Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan., Kadhim ZJ; Optics Techniques Department, Al-Mustaqbal University College, Hillah, Iraq., Lafta HA; Al-Nisour University College, Baghdad, Iraq., Alnassar YS; The University of Mashreq, Baghdad, Iraq., Shams MA; Technical Engineering College, Al-Ayen University, Nasiriyah, Thi-Qar, Iraq., Almuhous NA; Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia., Ouladsmane M; Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia., Sillanpaa M; Department of Biological and Chemical Engineering, Aarhus University, Norrebrogade 44, 8000, Aarhus C, Denmark.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Mar; Vol. 30 (13), pp. 37332-37343. Date of Electronic Publication: 2022 Dec 26.
DOI: 10.1007/s11356-022-24839-z
Abstrakt: Photocatalysis is considered a useful technique employed for the dye degradation through solar light, visible or UV light irradiation. In this study, TiO 2 , g-C 3 N 4 , and TiO 2 -g-C 3 N 4 nanocomposites were successfully synthesized and studied for their ability to degrade Rhodamine B (RhB) and Reactive Orange 16 (RO-16), when exposed to visible light. The analytical techniques including XRD, TEM, SEM, DRS, BET, XPS, and fluorescence spectroscopy were used to explore the characteristics of all the prepared semiconductors. The photocatalytic performance of synthesized materials has been tested against both the selected dyes, and various experimental parameters were studied. The experimental results demonstrate that, in comparison to other fabricated composites, the TiO 2 -g-C 3 N 4 composite with the optimal weight ratio of g-C 3 N 4 (15 wt%) to TiO 2 has shown outstanding degrading efficiency against RhB (89.62%) and RO-16 (97.20%). The degradation experiments were carried out at optimal conditions such as a catalyst load of 0.07 g, a dye concentration of 50 ppm, and a temperature of 50 ℃ at neutral pH in 90 min. In comparison to pure TiO 2 and g-C 3 N 4 , the TiO 2 -g-C 3 N 4 , a semiconductor, has shown higher degradation efficiency due to its large surface area and decreased electron-hole recombination. The scavenger study gave an idea about the primary active species ( - OH radicals), responsible for dye degradation. The reusability of TiO 2 -g-C 3 N 4 was also examined in order to assess the composite sustainability.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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