中孔石墨碳负载TiO2复合材料光催化降解罗丹明B和苯酚

催化学报 , 2008, 29(1): 31-36.

中孔石墨碳负载TiO2复合材料光催化降解罗丹明B和苯酚

肖义 ^1, , 党利琴 ^2, , 安丽珍 ^3, , 白士英 ^4, , 雷志斌 ^5,

1.辽宁师范大学化学化工学院功能材料化学研究所,辽宁大连,116029

2.辽宁师范大学化学化工学院功能材料化学研究所,辽宁大连,116029

3.辽宁师范大学化学化工学院功能材料化学研究所,辽宁大连,116029

4.辽宁师范大学化学化工学院功能材料化学研究所,辽宁大连,116029

5.辽宁师范大学化学化工学院功能材料化学研究所,辽宁大连,116029;福建省光催化重点实验室-省部共建国家重点实验室培育基地,福建福州,350002

基金项目: 大连市自然科学基金(2006 J23 JH019) 辽宁省自然科学基金(2050798)

关键词：中孔碳 , 催化石墨化 , 二氧化钛 , 罗丹明B , 苯酚 , 光降解

Photocatalytic Degradation of Rhodamine B and Phenol by TiO2 Loaded on Mesoporous Graphitic Carbon

以26 nm单分散的SiO2球为模板,苯乙烯为碳源, Ni为催化剂,在950 ℃合成了比表面积为298.2 m2/g的中孔石墨碳材料. 采用粉末X射线衍射、低温N2吸附、热重分析和透射电镜等对碳材料进行了结构表征. 结果发现,通过Ni的催化作用,可在较低温度下得到高度石墨化的中孔碳材料. 采用溶胶-凝胶法将TiO2负载在中孔石墨碳材料上,形成TiO2/石墨碳复合材料. 以罗丹明B和苯酚的光催化降解为探针反应,考察了TiO2/石墨碳复合材料的光催化降解活性. 结果表明,在紫外光照射下,罗丹明B和苯酚在该复合材料上的光催化降解反应遵循一级反应动力学,复合材料对罗丹明B和苯酚的光催化降解活性明显高于相同条件下制备的纯锐钛矿型TiO2.

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