高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (12): 3561.doi: 10.7503/cjcu20210542

• 无机化学 • 上一篇    下一篇

纤锌矿型β-CuGa1-xZnxO2的Zn2+取代Ga3+不等价掺杂对其结构及光催化性质的影响

姚明彩1,2, 杨强1, 孟健1, 刘孝娟1,2()   

  1. 1.稀土资源与利用国家重点实验室, 中国科学院长春应用化学研究所, 长春 130022
    2.中国科学技术大学应用化学与工程学院, 合肥 230026
  • 收稿日期:2021-07-30 出版日期:2021-12-10 发布日期:2021-09-23
  • 通讯作者: 刘孝娟 E-mail:lxjuan@ciac.ac.cn
  • 基金资助:
    吉林省自然科学基金(20190201106JC);国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(U2130114)

Effect of Zn2+ Substituting Ga3+ on Structure and Photocatalytic Properties of Wurtzite β-CuGa1-xZnxO2 with Unequal Doping

YAO Mingcai1,2, YANG Qiang1, MENG Jian1, LIU Xiaojuan1,2()   

  1. 1.State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.College of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
  • Received:2021-07-30 Online:2021-12-10 Published:2021-09-23
  • Contact: LIU Xiaojuan E-mail:lxjuan@ciac.ac.cn
  • Supported by:
    the Natural Science Foundation of Jilin Province, China(20190201106JC);the China Academy of Engineering Physics?NSAF Joint Fund of National Natural Science Foundation of China(U2130114)

摘要:

采用离子交换法制备了Zn2+在Ga-位不等价掺杂的功能陶瓷材料(β-CuGa1-xZnxO2). 通过X射线衍射(XRD)和透射电子显微镜(TEM)对材料的晶体结构进行表征, 通过原位高温X射线衍射(HT-XRD)和同步热分析仪(TG-DSC)对材料的热稳定性进行表征, 通过紫外-可见漫散射光谱(UV-Vis DRS)以及第一性原理计算对材料的光学性质进行研究, 并通过甲基橙(MO)的降解反应评价了Zn2+在Ga-位的引入对该功能陶瓷光催化性能的影响. 结果显示, Zn2+的引入引起带隙变宽, 吸光范围变窄, 自发极化变小, 进而导致单位时间内生成的高活性物质减少, 不利于降解反应. 通过光致发光光谱(PL)对降解机理进行了初步探究. 根据实验结果提出了改进β-CuGaO2性质的可能方法.

关键词: β-CuGa1-xZnxO2, 不等价掺杂, 光催化降解

Abstract:

Functional ceramic material with unequal doping of Zn2+ at the Ga-site, β-CuGa1-xZnxO2, were synthesized via ion exchange method. Firstly, the crystal structure of the material was investigated by means of X-ray diffraction(XRD) and transmission electron microscopy(TEM). Furthermore, the thermal stability of the material was studied by in?situ high temperature X-ray diffraction(HT-XRD) and synchronous thermal analyzer(TG-DSC). Next, the optical properties of the material were assessed by UV-Vis diffuse scattering spectroscopy(UV-Vis DRS) and first principles calculations. Then, the effect of the introduction of Zn2+ at the Ga-site on the performance of the ceramic was evaluated by the degradation reaction of methyl orange(MO). The results showed that the introduction of Zn2+ is unfavorable to the degradation reaction. Finally, the degradation mechanism was investigated by photoluminescence spectroscopy(PL). In summary, based on the above experimental results, another possible method to improve the properties of β-CuGaO2 is proposed.

Key words: β-CuGa1-xZnxO2, Non-equivalent doping, Photo-catalytic degradation

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