高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (11): 2629.doi: 10.7503/cjcu20130270

• 物理化学 • 上一篇    下一篇

微波辐射对纳米ZnO材料物理性质与光催化活性的影响

高宇1, 李莉1,2, 张秀丽1, 王丽丽1, 张文治1, 黄贤丹1   

  1. 1. 齐齐哈尔大学材料科学与工程学院, 齐齐哈尔 161006;
    2. 黑龙江省高校复合改性材料重点实验室, 齐齐哈尔 161006
  • 收稿日期:2013-03-22 出版日期:2013-11-10 发布日期:2013-05-03
  • 作者简介:李莉,女,博士,教授,主要从事纳米复合材料的制备与光催化性能研究,E-mail:qqhrll@163.com
  • 基金资助:

    国家自然科学基金(批准号:21376126)、黑龙江省自然科学基金(批准号:B201106)、黑龙江省教育厅科学技术研究项目(批准号:12511592)、黑龙江省政府博士后资助经费(批准号: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.

Effect of Microwave Irradiation on Physical Properties and Photocatalytic Activities of ZnO Nano-material

GAO Yu1, LI Li1,2, ZHANG Xiu-Li1, WANG Li-Li1, ZHANG Wen-Zhi1, HUANG Xian-Dan1   

  1. 1. College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China;
    2. Key Laboratory Composition of Polymer and Modification College of Heilongjiang Province, Qiqihar 161006, China
  • Received:2013-03-22 Online:2013-11-10 Published:2013-05-03

PDF (PC)

被引次数

4

摘要：

在采用沉淀法制备ZnO的过程中, 用不同功率(100, 150, 200, 250和300 W)的微波辐射ZnO前驱体, 获得了一系列纳米ZnO材料, 并对合成材料的晶型结构、 形貌及表面物理化学性质进行了表征. 结果表明, 与普通沉淀法制备的ZnO相比, 使用微波辐射后ZnO半导体材料的晶型仍为六方纤锌矿结构, 但吸收光谱发生了蓝移或红移, 且比表面积均有不同程度的增加. 同时, 微波辐射功率不同, ZnO形貌差异明显, 并随着微波功率变化分别呈现纳米颗粒、 椭圆形纳米团簇、 纳米片和球状纳米簇等多样化形态. 以罗丹明B为模型分子, 分别在紫外及微波辅助光催化条件下考察了所合成纳米ZnO材料的光催化性能. 结果显示, 经不同功率微波辐射作用后, ZnO的光催化活性均得到了不同程度的提高, 并且明显高于市售P25和未经微波辐射作用的ZnO.

关键词: 微波, 纳米ZnO材料, 光催化, 罗丹明B

Abstract:

A series of ZnO nano-materials was prepared by sedimentation method under different microwave power(100, 150, 200, 250 and 300 W) irradiation. The crystal structures, morphologies and surface physicochemical properties of the as-prepared samples were characterized by X-ray diffraction(XRD), UV-Vis diffuse reflectance spectrum(UV-Vis/DRS), scanning electron microscopy(SEM) and N2 adsorption/desorption determination. The results indicate that the crystalline phase of ZnO sample with different microwave power irradiation is hexagonal wurtzite, moreover, compared with the ZnO prepared by conventional sedimentation, there are blue shift or red shift in the absorption spectra, and the specific surface area is increased more or less. The morphology of each ZnO sample is much distinctive because of the different microwave power, which shows many kinds of shape including nano-grain, oval nano-clusters, nano-plane, spherical nano-clusters and so on. Photocatalytic properties of the ZnO nano-materials were tested by the UV irradiation and microwave-assisted photodegradation of Rhodamine B(RhB). The results show that the photocatalytic activities of ZnO prepared under different microwave power irradiation are enhanced in different degrees, which are much higher than that of P25 and ZnO sample without microwave irradiation.

Key words: Microwave, ZnO nano-material, Photocatalysis, Rhodamine B

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