Original Article

Photocatalytic Removal of Toluene Vapour Pollutant from the Air Using Titanium Dioxide Nanoparticles Supported on the Natural Zeolite


Background: The emission of volatile organic compounds (VOCs) in industrial and urban areas has adverse effects on the environment and human health. Toluene, the main pollutant among the VOCs, has wide applications in different industries such as plastics, adhesives, silicone sealant, paint, etc. This study aimed to remove of toluene from the air by using TiO2 nanoparticles supported on the natural zeolite using the photocatalytic process.

Methods: This is an experimental study that was conducted in 2017 in the Chemical Agents Laboratory of the Occupational Health Engineering Department at Jundishapur University in Ahvaz. Toluene vapour decomposition was carried out using UV/ZE, UV/TiO2, and UV/TiO2-ZE under continuous flows conditions. The effects of toluene initial concentration, retention time, and nanocomposite surface weight on toluene vapour decomposition were also investigated.

Results: When UV/TiO2 and UV/TiO2-ZE systems are performed, increasing the initial toluene concentration reduces the efficiency of photocatalytic decomposition. The SEM images of TiO2-ZE catalyst show that zeolite pores were occupied by titanium dioxide nanoparticles. Moreover, the combination of titanium dioxide nanoparticles and zeolite has an incremental effect on toluene decomposition. Increasing retention time raises toluene decomposition, and the increased nanocomposite surface weight raises decomposition to the maximum level (70%) at 33.68 mg/cm2 weight and then decreases.

Conclusion: The increasing toluene decomposition rate by using the TiO2-ZE nanocomposite can be due to the incremental effect of absorption and photocatalytic decomposition.


(2005). Dermal exposure assessment to benzene and toluene using charcoal cloth pads. J Expo Sci Environ Epidemiol, 15(1):47-50.
2. Sahri M, Widajati N (2013). Evaluation of Toluene Exposure in Workers at Indus-trial Area of Sidoarjo, Indonesia by Measurement of Urinary Hippuric Acid. Asia Pac J Med Toxicol, 2:145-9.
3. Hajimiragha H, Ewers U, Brockhaus A, Boettger A (1989). Levels of benzene and other volatile aromatic compounds in the blood of non-smokers and smokers. Int Arch Occup Environ Health, 61(8):513-8.
4. Hougaard KS, Hass U, Lund SP, Simonsen L (1999). Effects of prenatal exposure to toluene on postnatal development and behavior in rats. Neurotoxicol Teratol, 21(3):241-50.
5. Shih HT, Yu CL, Wu MT, et al (2011). Sub-clinical abnormalities in workers with continuous low-level toluene exposure. Toxicol Ind health, 27(8):691-9
6. American Conference of Governmental In-dustrial Hygienists. 2021 Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs); Signature Publication; American Conference of Governmental Industrial Hygienists: Cincinnati, OH, USA, 2021; p. 34.
7. Wang LK, Pereira NC, Hung YT (2004). Air pollution control engineering. Springer.
8. Rezaee A, Rangkooy H, Khavanin A, Jafari AJ (2014). High photocatalytic decompo-sition of the air pollutant formaldehyde using nano-ZnO on bone char. Environ Chem let, 12(2):353-7.
9. Palau J, Colomer M, Penya-Roja JM, Mar-tínez-Soria V (2012). Photodegradation of toluene, m-xylene, and n-butyl acetate and their mixtures over TiO2 catalyst on glass fibers. Ind Eng Chem Res, 51(17):5986-94.
10. Parvari R, Ghorbani-Shahna F, Bahrami A, et al (2020). A novel core-shell structured α-Fe2O3/Cu/g-C3N4 nanocomposite for continuous photocatalytic removal of air ethylbenzene under visible light irra-diation. J Photochem Photobiol A Chem, 24:112643.
11. Tseng TK, Lin YS, Chen YJ, Chu H (2010). A review of photocatalysts prepared by sol-gel method for VOCs removal. In J Mol Sci, 11(6):2336-61.
12. Yang Y, Zhan S, Goa X, et al (2013). Deg-radation of Toluene Using Modified TiO2 as Photocatalysts. AMR, 669:7-18.
13. Šuligoj A, Štangar UL, Ristić A, et al (2016). TiO 2–SiO 2 films from organic-free col-loidal TiO 2 anatase nanoparticles as photocatalyst for removal of volatile or-ganic compounds from indoor air. Appl Catal B, 184:119-31.
14. Sansotera M, Kheyli SG, Baggioli A, et al (2019). Absorption and photocatalytic degradation of VOCs by perfluorinated ionomeric coating with TiO2 nanopow-ders for air purification. Che Eng J, 1;361:885-96.
15. Shiraishi F, Maruoka D, Tanoue Y (2017). A better UV light and TiO 2-PET sheet ar-rangement for enhancing photocatalytic decomposition of volatile organic com-pounds. Sep Purif Technol, 175:185-93.
16. Colón G, Maicu M, Hidalgo M, et al (2010). Gas phase photocatalytic oxidation of toluene using highly active Pt doped TiO 2. J Mol Catal A Chem, 320(1):14-8.
17. Beauchet R, Magnoux P, Mijoin J (2007). Catalytic oxidation of volatile organic compounds (VOCs) mixture (isopropa-nol/o-xylene) on zeolite catalysts. Catal Today, 124(3):118-23.
18. Rezaee A, Rangkooy H, Jonidi-Jafari A, Khavanin A (2013). Surface modification of bone char for removal of formalde-hyde from air. Appl Surf Sci, 286:235-9.
19. Rangkooy HA, Ghaedi H, Jahani F (2019). Removal of xylene vapor pollutant from the air using new hybrid substrates of TiO2-WO3 nanoparticles immobilized on the ZSM-5 zeolite under UV radiation at ambient temperature: experimental to-wards modeling. J Environ Chem Eng, 7(4):103247.
20. Kazemian H (2004). An Introduction to Ze-olites: The Magic Minerals. Behesht Publica-tion, Tehran, Iran ISBN, 964-92798.
21. Assari MJ, Rezaee A, Rangkooy H (2015). Bone char surface modification by nano-gold coating for elemental mercury vapor removal. Appl Surf Sci, 342:106-11.
22. Hong Q, SUN D-z, CHI G-q (2007). For-maldehyde degradation by UV/TiO 2/O 3 process using continuous flow mode. J Environ Sci, 19(9):1136-40.
23. Koli VB, Kim JS (2019). Photocatalytic oxi-dation for removal of gases toluene by TiO2-CeO2 nanocomposites under UV light irradiation. Mater Sci Semicond Process, 94:70-9.
24. Zou L, Luo Y, Hooper M, Hu E (2006). Removal of VOCs by photocatalysis process using adsorption enhanced TiO2–SiO2 catalyst. Chem Eng Pro-cess.Process Intensification, 45(11):959-64.
25. Lu Y, Wang D, Ma C, Yang H (2010). The Effect of Activated Carbon Adsorption on the Photocatalytic Removal of For-maldehyde. Build Environ, 45(3):615-21.
26. Irvani H, Pour MN, Vahidi A, Arezooman-dan S, Abady HSF (2018). Removal of toluene vapors from the polluted air with modified natural zeolite and titanium di-oxide nanoparticles. Med Gas Res, 8(3):91-97.
27. Yu H, Zhang K, Rossi C (2007). Theoretical study on photocatalytic oxidation of VOCs using nano-TiO 2 photocatalyst. J Photochem Photobiol A Chem, 188(1):65-73.
IssueVol 52 No 1 (2023) QRcode
SectionOriginal Article(s)
DOI https://doi.org/10.18502/ijph.v52i1.11681
Toluene Zeolite Titanium dioxide nanoparticles Photocatalytic decomposition

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How to Cite
Rangkooy HA, Mokaramian S, Zargar B. Photocatalytic Removal of Toluene Vapour Pollutant from the Air Using Titanium Dioxide Nanoparticles Supported on the Natural Zeolite. Iran J Public Health. 2023;52(1):184-192.