Core–Sheath CeO2/SiO2 Nanofibers as Nanoreactors for Stabilizing Sinter-Resistant Pt, Enhanced Catalytic Oxidation and Water Remediation
Yunpeng Wang , Zhihui Li , Wanlin Fu , Yueming Sun , Yunqian Dai
Advanced Fiber Materials ›› 2022, Vol. 4 ›› Issue (5) : 1278 -1289.
Core–Sheath CeO2/SiO2 Nanofibers as Nanoreactors for Stabilizing Sinter-Resistant Pt, Enhanced Catalytic Oxidation and Water Remediation
One-dimensional (1D) oxide nanofibers have attracted much attention in recent years but are still hampered by the difficulty in the expansion to 2D or 3D dimensions. Herein, ultrathin CeO2/SiO2 nanofibers with intriguing core–sheath structures were simply fabricated by a facile single-spinneret electrospinning method and were subsequently integrated as 2D nanofibrous mats and 3D sponges. Introducing secondary oxide (i.e., SiO2) could induce a unique fine structure and further inhibit the sintering of CeO2 nanocrystals, endowing the resultant dual-oxide nanofibers with high porosity, good flexibility, and enriched oxygen defects. Benefiting from the core–sheath structure and dual-oxide component, the CeO2/SiO2 nanofibers could stabilize 2.59 nm-Pt clusters against sintering at 600 °C. Once assembled into a 2D mat, the nanofibers could efficiently decrease the soot oxidation temperature by 63 °C. Moreover, the core–sheath CeO2/SiO2 nanofibers can be readily integrated with graphene nanosheets into a 3D sponge via a gas foaming protocol, showing 218.5 mg/g of adsorption capacity toward Rhodamine B molecules. This work shed lights on the versatile applications of oxide nanofibers toward clean energy ultilization and low-carbon development.
Ultrathin core–sheath CeO2/SiO2 nanofibers were fabricated by a facile single-spinneret electrospinning method and were subsequently integrated as 2D nanofibrous mats and 3D sponges, exhibiting desirable efficiency in heterogeneous catalysis and water remediation.
the Postgraduate Research & Practice Innovation Program of Jiangsu Province(KYCX22_0261)
Natural Science Foundation of China(21975042)
Project of Six Talents Climax Foundation of Jiangsu(XCL–082)
Innovation Platform Project Supported by Jiangsu Province(6907041203)
Young Talent Lifting Project of Jiangsu Science and Technology Associate
Fundamental Research Funds for the Central Universities
Priority Academic Program Development of Jiangsu Higher Education Institutions
open project of State Key Laboratory of Physical Chemistry of Solid Surfaces in Xiamen University
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