Iron oxide nanoparticles immobilized to mesoporous NH2-SiO2 spheres by sulfonic acid functionalization as highly efficient catalysts
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Zhang, Guoliang
- 通讯作者：
- Zhang, GL (reprint author), Zhejiang Univ Technol, Coll Chem Engn & Mat Sci, Inst Ocean & Environm Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China.
- 合写作者：
- Qin, Lei,Wu, Yujiao,Xu, Zehai,Guo, Xinwen
- 发表时间：
- 2015-01-21
- 发表刊物：
- NANOSCALE
- 收录刊物：
- SCIE、EI、Scopus
- 文献类型：
- J
- 卷号：
- 7
- 期号：
- 3
- 页面范围：
- 1102-1109
- ISSN号：
- 2040-3364
- 摘要：
- A novel SiO2 nanosphere was synthesized by the post-synthetic grafting of sulfonic acid groups on to anionic-surfactant-templated mesoporous NH2-silica (AMAS). This one-pot post-functionalization strategy allowed more metal ions to be homogeneously anchored into the channel of the meso-SiO2 nanosphere. After hydrothermal and calcination treatment, the in situ growth of alpha-Fe2O3 on sulfonic acid-functionalized mesoporous NH2-SiO2 (SA-AMAS) exhibited much higher activity in the visible-light assisted Fenton reaction at neutral pH than that for AMAS or meso-SiO2 nanospheres. By analysis, the grafted sulfonic acid group can not only enhance the acid strength of the catalyst, but can also bring more orbital-overlapping between the active sites (Fe-II and Fe-III) and the surface peroxide species, to facilitate the decomposition of H2O2 to hydroxyl radical. The present results provide opportunities for developing heterogeneous catalysts with high-performance in the field of green chemistry and environmental remediation.
- 是否译文：
- 否
