Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/97111
Title: Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst
Authors: Lim, Teik-Thye
Hou, Dianxun
Feng, Liang
Zhang, Jianbin
Dong, Shuangshi
Zhou, Dandan
Issue Date: 2011
Source: Hou, D., Feng, L., Zhang, J., Dong, S., Zhou, D., & Lim, T.-T. (2012). Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst. Journal of Hazardous Materials, 199-200, 301-308.
Series/Report no.: Journal of hazardous materials
Abstract: A novel spherical activated carbon (SAC) supported and Er3+:YFeO3-doped TiO2 visible-light responsive photocatalyst (Er3+:YFeO3/TiO2-SAC) was synthesized by a modified sol–gel method with ultrasonic dispersion. It was characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDS), powder X-ray diffractometer (XRD) and UV–vis diffuse reflectance spectrophotometer (DRS). The photocatalytic activity of Er3+:YFeO3/TiO2-SAC was evaluated for degradation of methyl orange (MO) under visible light irradiation. The effects of calcination temperature and irradiation time on its photocatalytic activity were examined. The experimental results indicated that Er3+:YFeO3 could function as an upconversion luminescence agent, enabling photocatalytic degradation of MO by TiO2 under visible light. The Er3+:YFeO3/TiO2 calcinated at 700 °C showed the highest photocatalytic capability compared to those calcinated at other temperatures. The photocatalytic degradation of MO followed the Langmuir–Hinshelwood kinetic model. Although the photocatalyst showed a good physical stability and could tolerate a shear force up to 25 × 10−3 N/g, its photocatalytic activity decreased over a four-cycle of reuse in concentrated MO solution, indicating that the decreased activity was ascribed to the fouling of catalyst surface by MO during the degradation process. However, the fouled Er3+:YFeO3/TiO2-SAC could be regenerated through water rinsing-calcination or acid rinsing-calcination treatment.
URI: https://hdl.handle.net/10356/97111
http://hdl.handle.net/10220/11669
ISSN: 0304-3894
DOI: http://dx.doi.org/10.1016/j.jhazmat.2011.11.011
Rights: © 2011 Elsevier B.V.
metadata.item.grantfulltext: none
metadata.item.fulltext: No Fulltext
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