Strong enhancement on dye photocatalytic degradation by ball-milled TiO2: A study of cationic and anionic dyes. Issue 8 (August 2017)

• Record Type: Journal Article
• Authors: Jia, Z.; La, L.B.T.; Zhang, W.C.; Liang, S.X.; Jiang, B.; Xie, S.K.; Habibi, D.; Zhang, L.C.
• Is Part Of: Journal of materials science & technology. Volume 33:Issue 8(2017:Aug.)
• Page Start: 856
• Page End: 863
• Publication Date: 2017-08
• Subjects: Ball-milled TiO2 -- Congo red -- Methylene blue -- Equilibrium adsorption -- Photocatalysis; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2017.02.006
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: TiO2 particles with desirable properties were produced by undergoing specific durations of ball milling. Characterizations of the TiO2 particles before and after ball milling were investigated via X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), particle size analysis, zeta potential, and scanning electron microscope (SEM). The equilibrium adsorption data were well fitted to Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherms. Compared to the as-received TiO2 (mean particle size d 50 = 0.78 μm, specific surface area = 88.17 m 2 g −1, pore volume = 0.41 cm 3 g −1 ), the 60 min ball-milled TiO2 ( d 50 = 0.55 μm, specific surface area = 99.48 m 2 g −1, pore volume = 0.48 cm 3 g −1 ) enhanced the adsorption quantity of congo red and methylene blue from 10.4 mg g −1 to 13.6 mg g −1, and from 17.0 mg g −1 to 22.2 mg g −1, respectively; and also improved the kinetic rates from k = 0.1325 to 0.2193, and k = 0.0944 to 0.1553, respectively. Dye adsorption and degradation efficiency of congo red was enhanced in acidic pH range (2–5.14), and methylene blue was enhanced in alkaline pH range (7.58–12).