Study of the Photocatalytic Degradation of Rhodamine B on TiO2/Clinoptilolite

doi:10.7517/j.issn.1674-0475.2007.04.284

Abstract

Abstract: A series of TiO₂/clinoptilolite catalysts(different calcination temperature,different particle size and different loading) were prepared.The catalysts can degrade organic dye RhB under UV irradiation.The results show that they have a better catalytic reactivity when the calcination temperature is 500 ℃,the particle size is 180—200 mesh and the authentic mass fraction is 6.18%.It was compared with P25.The results show that its degradation rate is slower than P25:After UV light irradiation of 84 minutes,COD change of P25 is 100%.But after UV light irradiation of 5.5 h,COD change of TiO₂/clinoptilolite calcinated at 500 ℃ is 71.8%.But TiO₂/clinoptilolite catalysts are easier to reuse.Because the particle size of P25 is smaller,its sediment rate is slower and it can’t fastly be separated.XRD,TEM,BET,TG-DTA,UV,and Visible diffuse reflectance spectra were employed to characterize these catalysts.The experimental results show that they will have a better photocatalytic reactivity when their BET surface area is bigger.

Key words: TiO₂/clinoptilolite, RhB, UV light irradiation, photocatalytic, degradation

CLC Number:

LI Jing-yi, LIU Li-na, SIQIN Gao-wa, BAI Tu-ya. Study of the Photocatalytic Degradation of Rhodamine B on TiO₂/Clinoptilolite[J]. Imaging Science and Photochemistry, 2007, 25(4): 284-295.

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Study of the Photocatalytic Degradation of Rhodamine B on TiO₂/Clinoptilolite

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