Photocatalytic degradation of VOCs from air stream using Mo:TiO2/GAC nanocomposites. (4th February 2022)

• Record Type: Journal Article
• Authors: Abedi, Kamaladdin; Shahmoradi, Behzad; Mohammadi, Ebrahim; Wantala, Kitirote; Maleki, Afshin; Zandsalimi, Yahya; Salimi, Sonya; Kohzadi, Shadi
• Is Part Of: Materials research express. Volume 9:Number 2(2022)
• Publication Date: 2022-02-04
• Subjects: Mo -- TiO2/GAC -- Chloroform -- light source -- Photocdegradation -- organic compounds; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ac4aa3
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Modification of TiO2 is one of the techniques used to enhance its photodegradation efficiency and to make it visible-light-active. In this study, Mo-doped TiO2 nanoparticles were synthesized using a fast sol-gel technique and then coated on granular activated carbon (GAC) as both substrate and adsorbent to obtain Mo:TiO2 /GAC composite. The fabricated composite was characterized by many techniques such as powder XRD, SEM, EDX, FTIR, and N2 adsorption-desorption analysis. Then, the composite was applied to photodegrade volatile organic compounds (VOCs) under both UV and visible light irradiations. The characterization results showed high crystallinity and purity. Mo:TiO2 /GAC composite gave a higher photodegradation efficiency compared with bare TiO2 and bare GAC. Moreover, studying operational parameters showed that the optimum condition for photodegradation efficiency of VOCs was at a flowrate of 1 L min −1, VOCs concentration of 20 ppm, and light intensity of 400 and 600 W m −2 for UV and visible light, respectively. The results suggest that Mo:TiO2 /GAC is a visible-light-active composite and can be acceptably used to decompose VOCs under visible light with adequate efficiency and without the generation of harmful by-products such as O3 as compared with UV.