TY - JOUR
T1 - Strong enhancement on dye photocatalytic degradation by ball-milled TiO2
T2 - A study of cationic and anionic dyes
AU - Jia, Z.
AU - La, L. B T
AU - Zhang, W. C.
AU - Liang, S. X.
AU - Jiang, B.
AU - Xie, S. K.
AU - Habibi, D.
AU - Zhang, L. C.
PY - 2017/8
Y1 - 2017/8
N2 - 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 = 0.78μm, specific surface area=88.17m2 g-1, pore volume=0.41cm3 g-1), the 60min ball-milled TiO2 (d 50 = 0.55μm, specific surface area=99.48m2 g-1, pore volume=0.48cm3 g-1) enhanced the adsorption quantity of congo red and methylene blue from 10.4mgg-1 to 13.6mgg-1, and from 17.0mgg-1 to 22.2mgg-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).
AB - 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 = 0.78μm, specific surface area=88.17m2 g-1, pore volume=0.41cm3 g-1), the 60min ball-milled TiO2 (d 50 = 0.55μm, specific surface area=99.48m2 g-1, pore volume=0.48cm3 g-1) enhanced the adsorption quantity of congo red and methylene blue from 10.4mgg-1 to 13.6mgg-1, and from 17.0mgg-1 to 22.2mgg-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).
KW - Ball-milled TiO
KW - Congo red
KW - Equilibrium adsorption
KW - Methylene blue
KW - Photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85015663094&partnerID=8YFLogxK
U2 - 10.1016/j.jmst.2017.02.006
DO - 10.1016/j.jmst.2017.02.006
M3 - Article
VL - 33
SP - 856
EP - 863
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
SN - 1005-0302
IS - 8
ER -