Fe-Al+柱撑膨润土的制备及其非均相Fenton降解橙黄II.pdf

物理化学学报( Wuli Huaxue Xuebao)
November
Acta Phys.-Chim.Sin.2013,29(11)22429-2436
2429
[ Article」
doi:10.3866/PKU.WHXB201310084
www.whxb.pku.edu.cn
Fe~?柱撑膨润土的制备及其非均相 Fenton降解橙黄
万栋王光华'李文乓陈坤舒广
(武汉科技大学化学工程与技术学院,武汉430081)
摘要:通过离子交换方法制备不同Fe含量的Fe-?柱撑膨润土,并且研究了其作为非均相 -enton催化剂降
解橙黄I的性能.通过X射线粉木衍射(KRD),比表面积(SaEr),傅里叶变换红外(FTIR)光谱,拉曼( Raman)光谱
和扫描电子显微镜(SEM)研究其结构特征.结果显示,钠化膨润土的层间距为1.24mm,经过柱撑之后,A柱
撑膨润土的层间距增大到1.77nm,Fe-A?柱撑膨润土为1.72nm左右,并且比表面积也有明显增大.XRD和
Raman结果表明Fe/(Fe+A)摩尔比达到20%时,样品中出现a-FeOa,膨润土未能形成柱撑.在橙黄初始浓度
为100mg-L,催化剂用量为1.0g“L1,温度为40°C,pH为3.0,HO2初始浓度为10mmol-L1的条件下,考察
了柱撑膨润土的 Fenton催化活性.结果表明,Fe-?柱撑膨润土的催化性能随着Fe含量的增多先增大后略有
降低,当Fe(Fe+A)摩尔比为10%时达到最大,橙黄溶液在4h内色度去除率和化学需氧量(CODe)去除率分
别达到100%和87.73%,并且降解反应为非均相 -enton反应.研究了Fe-?柱撑膨润土的重复使用性.催化剂
循环使用4次,仍然具有良好的活性
关键词:Fe-A柱撑膨润士;非均相催化剂;橙黄l; Fenton反应;降解
中图分类号:O643
Synthesis of Fe-al Pillared Bentonite and Heterogeneous
Fenton Degradation of Orange I
WAN Dong WANG Guang-hua LI Wen-bing CHEN Kun
SHU Guang
(College of Chemical Engineering and Technolog, Wuhan University of Science and Technology Wuhan 430081, P R China
Abstract: A series of Fe-al pillared bentonites with different Fe contents were synthesized through a
simple ion exchange method. The samples were used as catalysts for the heterogeneous Fenton
degradation of rane I Th microsuture of the catalysts was characterized by X-ray diffraction(XRD)
specific surface area measurements (S e ), Fourier transform infrared (TR)spectroscopy, Raman
spectroscopy, and scanning electron microscopy(SEM). The obtained results showed that the pillaring
process increased the basal spacing(d ) from 1 4 nm for the Na-bentonite( Bent)to 1.77 nm for the Al-
Bent and -1.72 nm for the Fe-al pillared bentonites. The Sarr values of the samples were increased after
llaring. t was obvious from the XRD and Raman results that intercalation was not achieved and that
hematite was formed in the 20fe-al-bent sample. The influence of Fe content on the degradation o
Orange I was Investigated, The catalytic activity of pillared bentonites increased with Fe content and
hardly increased when the molar ratio of F(A *Fe)in the pillaring solution exceeded 10%, The
decolorization efficiency and chemical oxygen demand(CODE)removal of Orange reached 100% and
Received July 11, 2013; Revised: October 7, 2013; Published on Web: October 8, 2013
CorrespondingauthorsWANGGuang-hua,Email:whuah@21cn.com;Tel;+86-13908643165.LIWen-bing,email:liwenbing@126.com
Tel:+86-18971670186
The project was supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China(20114219110002), Hubei Ke
Laboratory of Coal Conversion and New Carbon Materials Wuhan University of Science and Technolo ) China WKDM201107), and Educational
Commission of Hubei Province, China (D20131107)
高等学校博士学科点专项科研基金(20142191100煤转化与新型炭材料湖北省重点实验室开放基金(武汉科技大学)(WKDM201107)和湖
北省教育厅重点项目(D20131107资助
O Editorial office of Acta Physico-chimica Sinica