硅酸盐学报Issue(11)：1581-1587,7.DOI:10.7521/j.issn.0454-5648.2013.11.20
载银蒙脱石的制备及其对对硝基苯酚还原反应的催化性能
Preparation and Characterization of Silver-based Montmorillonite Nanocomposites and Catalytic Activity for 4-Nitrophenol Reduction
余焕焕 1刘芳 1王士琦 1杨李富 1张卫华 1何占航1
作者信息
- 1. 郑州大学化学与分子工程学院，郑州 450001
- 折叠
摘要
Abstract
Silver-loaded montmorillonite was preparedvia an ion exchange method and a chemical reduction method with silver ni-trate and montmorillonite as a silver precursor and a carrier, respectively. The silver content range in Ag/MMT determined by Mohr method is 0.5%-3.0%. The morphology and structure of as-synthesized specimens were characterized by X-ray diffraction, solid UV (UV-visible) absorbent scanning electron microscopy, and Zeta potential analysis, respectively. The results show that silver nanopar-ticles are inserted into the interlayer space of montmorillonite, and the structure of MMT does not change. Moreover, the samples exhibit effective catalytic and high selectivity for the reduction of 4-nitrophenol (4-NP) in the presence of excess NaBH4 in water. The reaction process accords with the pseudo-first-order kinetics. In addition, the degradation rate is approximately 100% within 15min. The Ag-deposited MMT catalyst nanoparticles still remain active even after they are reused for 23 cycles.关键词
蒙脱石/载银蒙脱石/催化剂/对硝基苯酚/活性Key words
montmorillonite/silver-loaded montmorillonite/catalyst/4-nitrophenol/activity分类
化学化工引用本文复制引用
余焕焕,刘芳,王士琦,杨李富,张卫华,何占航..载银蒙脱石的制备及其对对硝基苯酚还原反应的催化性能[J].硅酸盐学报,2013,(11):1581-1587,7.
