期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 110, 期 -, 页码 9-14出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2017.05.025
关键词
Elemental bismuth; Reduction of p-nitrophenol; Bi@SiO2 composites; In-situ reduction
资金
- National Natural Science Foundation of China (NSFC) [21273038, 21543002, 11305091]
- Open Project Program of the State Key Laboratory of Photo catalysis on Energy and Environment, Fuzhou University [SKLPEE-KF201703]
The present work reports that the elemental bismuth nanoparticles (Bi NPs) modified with silica can be obtained via in-situ reduction of bismuth oxide nanoparticles with porous silica coating layers. The as-synthesized samples were characterized by the powder X-ray diffraction, scanning electron microscope, transmission electron microscope, the Brunauer-Emmett-Teller surface areas and X-ray photoelectron spectroscopy. It is found that metallic bismuth nanoparticles are well covered by porous silica (Bi@SiO2) to form hybrids. Coating metallic bismuth nanoparticles with permeable silica makes it unsusceptible to agglomeration and deactivation, even if the metallic Bi NPs are stored in the oxygen-rich and aqueous atmospheres. Moreover, the synthesized samples can be employed as catalyst for reduction of p-nitrophenol into p-aminophenol. The optimal catalyst of Bi@SiO2-9.03 at % (9.03 = 100*n(si)/n(Bi)) exerts more satisfactory catalytic property and outstanding reusability than the bare metallic bismuth in this target reaction. The superior stability and enhanced activity enable the practical application of Bi NPs to be available and expedient.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据