Catalytic properties of CeO<sub>2</sub>-TiO<sub>2</sub>/attapulgite nanocomposites prepared by sol-gel method

MENG Yingqin; ZHAO Xiaobing; LI Xiazhang

doi:10.3969/j.issn.0438-1157.2013.07.050

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Catalytic properties of CeO₂-TiO₂/attapulgite nanocomposites prepared by sol-gel method

更新时间：2025-12-10

- Catalytic properties of CeO₂-TiO₂/attapulgite nanocomposites prepared by sol-gel method
- CIESC Journal Issue 7, Pages: 2679-2686(2013)
- 作者机构：
  
  常州大学材料科学与工程学院,江苏,常州,213164
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.07.050
  CLC： B332TB383
- Online First：05 July 2013，
  
  Published：05 July 2013
- 稿件说明：
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MENG Yingqin, ZHAO Xiaobing, LI Xiazhang. Catalytic properties of CeO₂-TiO₂/attapulgite nanocomposites prepared by sol-gel method[J]. CIESC Journal, 2013, (7): 2679-2686. DOI: 10.3969/j.issn.0438-1157.2013.07.050.
DOI：

MENG Yingqin, ZHAO Xiaobing, LI Xiazhang. Catalytic properties of CeO₂-TiO₂/attapulgite nanocomposites prepared by sol-gel method[J]. CIESC Journal, 2013, (7): 2679-2686. DOI: 10.3969/j.issn.0438-1157.2013.07.050. DOI：

摘要

以凹凸棒石(ATP)为载体

Ce(NO3)3·6H2O和Ti(OBu)4为原料

冰醋酸为抑制剂

采用溶胶-凝胶法制备CeO2-TiO2/ATP纳米复合材料。利用TG-DSC、TEM、XRD和N2吸附/脱附仪对复合材料进行表征

考察铈钛摩尔比对所制备样品催化降解罗丹明B溶液性能的影响。结果表明

当Ce/Ti≥5/5时

具有立方萤石结构的氧化物颗粒以固溶体形式均匀分布在ATP表面

颗粒尺寸约5~10 nm;随Ti4+的进一步增加

样品中的CeO2结晶不完全;当Ce/Ti<3/7时

样品中出现锐钛矿型TiO2的分离相。适量的Ti4+掺杂能促进CeO2产生较多的结构缺陷

有利于增加晶格氧空位的浓度

提高样品的催化活性。对罗丹明B的催化降解实验表明

当Ce/Ti=5/5时

样品的催化性能较好

对罗丹明B溶液的化学需氧量(COD)去除率可达96%以上。

Abstract

CeO2-TiO2/attapulgite (ATP)nanocomposites were prepared by the sol-gel method using ATP as support

cerium nitrate hexahydrate and tetrabutyl titanate as raw materials

glacial acetic acid as complexing agent.The microstructures of the as-prepared composites were characterized by thermogravimetric-differential scanning caloricity (TG-DSC)analysis

transmission electron microscopy (TEM)

X-ray diffraction (XRD)

and nitrogen adsorption-desorption measurements.The effects of Ce/Ti molar ratio on catalytic properties of the as-prepared composites for decomposing Rhodamine B solutions were investigated.The results indicated that when Ce/Ti was more than or equal to 5/5

CeO2-TiO2 solid solution oxide particles with cubic fluorite structure were uniformly coated on the surface of ATP with particle size of 5—10 nm.With the increase of Ti4+ content

CeO2 nanoparticles tended to form a defective crystalline phase and existed as amorphous phase.When Ce/Ti was less than 3/7

a separated anatase TiO2 was observed in the composites.A suitable amount of Ti4+ doping could promote the formation of structure defects

which contributed to increasing the content of oxygen vacancies and improving the catalytic activity.The catalytic efficiency of CeO2-TiO2/ATP (Ce/Ti=5/5)nanocomposite on Rhodamine B solution was higher than that of others

and the removal rate of chemical oxygen demand (COD)could reach over 96%.

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Catalytic properties of CeO2-TiO2/attapulgite nanocomposites prepared by sol-gel method

DOI：10.3969/j.issn.0438-1157.2013.07.050

摘要

Abstract

关键词

Keywords

references

Catalytic properties of CeO₂-TiO₂/attapulgite nanocomposites prepared by sol-gel method