化学学报 ›› 2012, Vol. 70 ›› Issue (06): 691-698.DOI: 10.6023/A1108301 上一篇    下一篇

研究论文

微波辅助制备CdS 插层K2La2Ti3O10 复合物及其光催化制氢的性能

崔文权, 齐跃丽, 胡金山, 刘利, 梁英华   

  1. 河北联合大学化学工程学院 唐山 063009
  • 收稿日期:2011-08-30 修回日期:2011-12-15 出版日期:2012-03-28 发布日期:2012-04-01
  • 通讯作者: 梁英华
  • 基金资助:

    国家自然科学基金(Nos. 50972037, 51172063)、河北省教育厅科研计划(No. 2010130)和唐山市科技计划(No. 10140201c-6)资助项目.

Synthesis of CdS-pillared K2La2Ti3O10 Catalyst via a Microwave Assisted Process and Its Photocatalytic Property

Cui Wenquan, Qi Yueli, Hu Jinshan, Liu Li, Liang Yinghua   

  1. College of Chemical Engineering, Hebei United University, Tangshan 063009, China
  • Received:2011-08-30 Revised:2011-12-15 Online:2012-03-28 Published:2012-04-01
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 50972037, 51172063), the Research Project of Education Department of Hebei Province (No. 2010130) and the Research Project of Tangshan City (No. 10140201c-6).

采用微波辅助通过酸交换、胺柱撑、离子交换等步骤制备了CdS 插层的K2La2Ti3O10(记做CdS-K2La2Ti3O10)复合光催化剂. 利用X射线粉末衍射(XRD), 场发射扫描电子显微镜(SEM), 紫外-可见漫反射吸收光谱(UV-Vis)和光致发光光谱(PL)等对产物进行表征, 考察了CdS-K2La2Ti3O10 在紫外光及可见光下催化制氢活性. 结果表明, 微波辅助法与传统法制备的插层复合催化剂晶型结构相似, 同时大大减少了离子交换反应时间, 减少了对层间结构的破坏, 拓展了催化剂的可见光吸收范围. 微波辅助制备的催化剂在紫外光和可见光照射3 h 后的产氢量分别为 221.53 mmol/(g cat.)和3.23 mmol/(g cat.), 并对光催化机理进行了分析.

关键词: 微波辅助, 插层复合, K2La2Ti3O10, CdS, 光催化

CdS-pillared K2La2Ti3O10 photocatalysts were synthesized via ion-exchange reaction, butylamine pillaring and sulfuration processes under the assistance of the microwave irradiation. The structure of the photocatalysts was determined by means of powder X-ray diffraction (XRD), scanning electron microscope (SEM), and ultraviolet-visible diffuse reflection spectra (UV-Vis). The photocatalytic activities of these composite compounds for hydrogen production were also investigated under UV and visible light irradiation. The results revealed that the CdS-pillared K2La2Ti3O10 photocatalysts prepared under the assistance of microwave irradiation possess the similar crystal structures with that prepared via a traditional waterlogging method. At the same time, microwave irradiation can greatly decrease the preparation time, resulting in less destruction of the layered structure and improve the absorption for visible light. The photocatalytic activities for hydrogen production of the CdS-pillared K2La2Ti3O10 photocatalyst prepared via a microwave assisted procedure were 221.53 mmol/(g cat.) and 3.23 mmol/(g cat.) under UV light and visible light irradiation, respectively, after 3 h irradiation. At last, the photocatalysis mechanism was deduced.

Key words: microwave, intercalation, K2La2Ti3O10, CdS, photocatalysis