高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (2): 319-326.doi: 10.7503/cjcu20170346

• 物理化学 • 上一篇    下一篇

新型Zn2+掺杂C/Nb2O5纳米催化剂的制备及光催化性能

薛佼, 王润伟(), 张宗弢, 裘式纶   

  1. 吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2017-06-06 出版日期:2018-02-10 发布日期:2017-12-01
  • 作者简介:联系人简介: 王润伟, 男, 博士, 副教授, 主要从事新型无机催化材料的开发和性质研究. E-mail: rwwang@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21261130584, 20741001)资助

Preparation and Photocatalytic Performance of Novel Zn-doped C/Nb2O5 Nanoparticles Catalyst

XUE Jiao, WANG Runwei*(), ZHANG Zongtao, QIU Shilun   

  1. College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University, Changchun 130012, China
  • Received:2017-06-06 Online:2018-02-10 Published:2017-12-01
  • Contact: WANG Runwei E-mail:rwwang@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21261130584, 20741001)

摘要:

采用水热技术制备了Zn掺杂的C/Nb2O5纳米催化剂. 通过X射线衍射(XRD)、 透射电子显微镜(TEM)和X射线光电子能谱(XPS)对催化剂进行了表征. 结果表明, 催化剂呈现较高的结晶度和较均匀的形貌, Zn元素以氧化锌的形式随机分布在C/Nb2O5纳米催化剂的表面, 当锌/铌摩尔比为10%时, 催化剂表面氧空穴(SOVs)的量会达到一个最优值. 对染料罗丹明B(RhB)和罗丹明6G(Rh6G)在可见光下的降解实验结果表明, 与商业P25, Nb2O5以及C/Nb2O5相比, 适量Zn掺杂的C/Nb2O5纳米催化剂具有更好的光催化活性.

关键词: C/Nb2O5, 氧化锌, 表面氧空穴, 光催化活性, 罗丹明B, 罗丹明6G

Abstract:

Novel Zn-doped C/Nb2O5 nanoparticles were prepared via a simple hydrothermal method. The nanoparticles were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM) and X-ray photoelectron spectroscopy(XPS). The as-prepared nanoparticles presented enhanced crystallinity with ultrafine morphology and Zn element was confirmed to exit as the form of ZnO randomly on the surface of C/Nb2O5. The amount of surface oxygen vacancies(SOVs) on the catalyst surface reached an optimal value when the molar ratio of Zn/Nb was 10% proved by the XPS and surface photovoltage spectroscopy(SPS) results. The catalyst with an optimal doping amount of Zn exhibited much higher photocatalytic activity than P25 and commercial Nb2O5 towards degradation of Rhodamine B(RhB) and Rhodamine 6G(Rh6G) under visible light irradiation.

Key words: C/Nb2O5, ZnO, Surface oxygen vacancies(SOVs), Photocatalytic activity, Rhodamine B(RhB), Rhodamine 6G(Rh6G)

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