中孔TUD负载的氧化铬掺杂氧化钛光催化降解苯酚

doi:10.1016/S1872-2067(16)62492-0

催化学报 ›› 2016, Vol. 37 ›› Issue (11): 1871-1881.DOI: 10.1016/S1872-2067(16)62492-0

中孔TUD负载的氧化铬掺杂氧化钛光催化降解苯酚

Yee Khai Ooi, Leny Yuliati, Siew Ling Lee

a 马来西亚工艺大学理学院化学系, 新山 81310, 马来西亚;
b 马来西亚工艺大学科学与工业研究所, 可持续纳米材料中心, 新山 81310, 马来西亚

收稿日期:2016-07-28 修回日期:2016-08-21 出版日期:2016-11-25 发布日期:2016-11-25
通讯作者: Siew Ling Lee, Tel:+607-5536039, Fax:+607-5536080, E-mail:sllee@ibnusina.utm.my

Phenol photocatalytic degradation over mesoporous TUD-1-supported chromium oxide-doped titania photocatalyst

Yee Khai Ooi, Leny Yuliati, Siew Ling Lee

a Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia;
b Center for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

Received:2016-07-28 Revised:2016-08-21 Online:2016-11-25 Published:2016-11-25
Contact: Siew Ling Lee, Tel:+607-5536039, Fax:+607-5536080, E-mail:sllee@ibnusina.utm.my

摘要/Abstract

摘要：

中孔的TUD-1负载的氧化铬掺杂TiO₂（Cr-TiO₂）有望用于紫外光照射下光催化降解苯酚的催化剂.低角X射线衍射和红外结果证实该样品中TUD-1存在无定形和中孔硅酸盐框架.TUD-1的中孔结构进一步得到N2吸附-脱附的证实：为IV型等温线，并具有窄的孔径分布（3.9 nm）和高的比表面积（>490 m²/g）.透射电镜结果表明，所制样品保持了纳米颗粒和多孔孔道结构.TUD-1中负载Cr-TiO₂后使得带隙能量增加.与未负载的Cr-TiO₂相比，所有TUD-1负载的Cr-TiO₂光催化剂表现出更高的紫外光下降解苯酚的活性.其中Si/Ti摩尔比为30的Cr-TiO₂/TUD-1样品的光催化活性最高（82%）.苯酚的光催化降解遵循一级Langmuir吸附等温线.

关键词: 苯酚, TUD-1, 二氧化钛, 光催化剂, 中孔

Abstract:

Mesoporous Technische Universiteit Delft (TUD-1)-supported chromium oxide-doped titania (Cr-TiO₂) was developed as a promising photocatalyst for phenol photodegradation under visible light irradiation. Low-angle X-ray diffraction and Fourier transform infrared spectroscopy results confirmed the amorphous and mesoporous silicate framework of TUD-1 in TUD-1-supported Cr-TiO₂. The mesostructure of TUD-1 was further verified via N₂ adsorption-desorption analysis, which showed a type-IV isotherm with a narrow average pore size distribution of 3.9 nm and high surface area of >490 m²/g. Transmission electron microscopy analysis results indicated that TUD-1-supported Cr-TiO₂ contained nanoparticles and porous channels. An increase in band gap energy was observed after loading Cr-TiO₂ into TUD-1. Compared with that of unsupported Cr-TiO₂, TUD-1-supported Cr-TiO₂ showed higher photocatalytic activity for phenol degradation under visi-ble light irradiation. The TUD-1 supported Cr-TiO₂ photocatalyst with a Si/Ti molar ratio of 30 ex-hibited the highest photodegradation of phenol (82%) of the prepared samples. The photodegrada-tion of phenol by the supported catalyst followed the Langmuir adsorption isotherm with first-order kinetics.

Key words: Phenol, TUD-1, Titania, Photocatalyst, Mesoporous

Yee Khai Ooi, Leny Yuliati, Siew Ling Lee. 中孔TUD负载的氧化铬掺杂氧化钛光催化降解苯酚[J]. 催化学报, 2016, 37(11): 1871-1881.

Yee Khai Ooi, Leny Yuliati, Siew Ling Lee. Phenol photocatalytic degradation over mesoporous TUD-1-supported chromium oxide-doped titania photocatalyst[J]. Chinese Journal of Catalysis, 2016, 37(11): 1871-1881.

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中孔TUD负载的氧化铬掺杂氧化钛光催化降解苯酚

Phenol photocatalytic degradation over mesoporous TUD-1-supported chromium oxide-doped titania photocatalyst

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