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Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst
นักวิจัย : Hou, Dianxun , Feng, Liang , Zhang, Jianbin , Dong, Shuangshi , Zhou, Dandan , Lim, Teik-Thye
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : 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. , 0304-3894 , http://hdl.handle.net/10220/11669 , http://dx.doi.org/10.1016/j.jhazmat.2011.11.011
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of hazardous materials
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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.

บรรณานุกรม :
Hou, Dianxun , Feng, Liang , Zhang, Jianbin , Dong, Shuangshi , Zhou, Dandan , Lim, Teik-Thye . (2554). Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Hou, Dianxun , Feng, Liang , Zhang, Jianbin , Dong, Shuangshi , Zhou, Dandan , Lim, Teik-Thye . 2554. "Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Hou, Dianxun , Feng, Liang , Zhang, Jianbin , Dong, Shuangshi , Zhou, Dandan , Lim, Teik-Thye . "Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Hou, Dianxun , Feng, Liang , Zhang, Jianbin , Dong, Shuangshi , Zhou, Dandan , Lim, Teik-Thye . Preparation, characterization and performance of a novel visible light responsive spherical activated carbon-supported and Er3+:YFeO3-doped TiO2 photocatalyst. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.