物理化学学报 >> 2013, Vol. 29 >> Issue (12): 2615-2623.doi: 10.3866/PKU.WHXB201310221

催化和表面科学 上一篇    下一篇

三维有序大孔复合材料Bi2O3/TiO2制备与多模式下光催化降解结晶紫

黄贤丹1, 李莉1,2, 魏秋颖1, 张文治1, 路露1   

  1. 1 齐齐哈尔大学材料科学与工程学院, 黑龙江齐齐哈尔 161006;
    2 黑龙江省高校复合改性材料重点实验室, 黑龙江齐齐哈尔 161006
  • 收稿日期:2013-07-16 修回日期:2013-10-16 发布日期:2013-11-28
  • 通讯作者: 李莉 E-mail:qqhrll@163.com
  • 基金资助:

    国家自然科学基金(21376126), 黑龙江省自然科学基金(B201106), 黑龙江省教育厅科学技术研究项目(12511592), 黑龙江省政府博士后资助经费(LBH-Z11108)和黑龙江省普通高校绿色化工技术重点实验室开放课题(2013 年)资助

Preparation of Three-Dimensionally Ordered Macroporous Composite Bi2O3/TiO2 and Its Photocatalytic Degradation of Crystal Violet under Multiple Modes

HUANG Xian-Dan1, LI Li1,2, WEI Qiu-Ying1, ZHANG Wen-Zhi1, LU Lu1   

  1. 1 College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, Heilongjiang Province, P. R. China;
    2 Key Laboratory of Composite Modified Material of Colleges in Heilongjang Provence, Qiqihar 161006, Heilongjiang Province, P. R. China
  • Received:2013-07-16 Revised:2013-10-16 Published:2013-11-28
  • Contact: LI Li E-mail:qqhrll@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21376126), Natural Science Foundation of Heilongjiang Province, China (B201106), Scientific Research of Heilongjiang Province Educaton Department (12511592), Government of Heilongjiang Province Postdoctoral Grants, China (LBH-Z11108), and Open Project of Green Chemical Technology Key Laboratory of Heilongjing Province College, China (2013 year).

摘要:

以TiO2为基体, 在聚苯乙烯(PS)胶球和EO20PO70EO20(P123)两种模板剂作用下通过溶胶-凝胶及煅烧后处理方法制备了三维有序大孔纳米复合材料Bi2O3/TiO2. 经傅里叶变换红外(FT-IR)光谱、X-射线衍射(XRD)、等离子体原子发射光谱(ICP-AES)、紫外-可见漫反射吸收光谱(UV-Vis DRS)、X-射线光电子能谱(XPS)、扫描电子显微镜(SEM)和N2吸附-脱附等物理测试手段对其组成、结构、形貌及表面物理化学性能进行了表征. 结果表明, 该复合材料晶型结构良好, 孔结构排列整齐有序, 孔壁呈介孔结构, 属于三维有序大孔材料(3DOM). 与TiO2相比, 3DOM-Bi2O3/TiO2对光的吸收至少红移60 nm, 且红移至可见区. 在紫外光、可见光以及微波辅助等多模式光催化降解结晶紫的实验中, 复合材料3DOM-Bi2O3/TiO2表现出良好的光催化活性, 其活性明显高于P25、Bi2O3和Bi2O3/TiO2. 同时, 该复合材料针对不同类型的染料均表现出较好的紫外光降解效果, 且3 次循环实验后, 依旧保持较高活性.

关键词: 聚苯乙烯, 三维有序大孔, Bi2O3/TiO2, 光催化, 结晶紫

Abstract:

Polystyrene latex (PS) spheres and EO20PO70O20 (P123) were used as dual template agents, with TiO2 as the matrix, to prepare a three-dimensionally ordered macroporous (3DOM) composite Bi2O3/TiO2, using a sol-gel method and post-processing calcination. The phase structures, chemical composition, morphology, and surface physicochemical properties were characterized using X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), ultraviolet-visible diffuse reflectance (UV-Vis DRS) and X-ray photoelectron spectroscopies (XPS), inductively coupled plasma atomic emission spectroscopy (ICP-AES), scanning electron microscopy (SEM), and N2 adsorption-desorption measurements. The results show that the composite is well crystallized and has a highly ordered porous structure with mesoporous walls; it is a 3DOM material. The light absorption of 3DOM-Bi2O3/TiO2 is red-shifted by about 60 nm to the visible region compared with TiO2. In the photocatalytic degradation of crystal violet using various methods, namely ultraviolet, visible-light, and microwave-assisted irradiation, the activity of 3DOM-Bi2O3/TiO2 is significantly higher than those of P25, Bi2O3, and Bi2O3/TiO2. The 3DOM-Bi2O3/TiO2 composite also shows good photocatalytic activity in the degradations of various dyes under ultraviolet irradiation. The 3DOM-Bi2O3/TiO2 activity is well retained after three cycles.

Key words: Polystyrene, Three-dimensionally ordered macroporous, Bi2O3/TiO2, Photocatalysis, Crystal violet

MSC2000: 

  • O644