Ni(0)nanoparticles(NPs)are unstable and tend to aggregate in water,which poses a considerable challenge in their catalytic application.To overcome these drawbacks,integrated Ni-noble metal bimetallic NPs with a hollow...Ni(0)nanoparticles(NPs)are unstable and tend to aggregate in water,which poses a considerable challenge in their catalytic application.To overcome these drawbacks,integrated Ni-noble metal bimetallic NPs with a hollow-structured support are expected to enhance performances in heterogeneous catalysis.Herein,we present a simple approach for facile fabrication of Ni NPs embedded in a carbon layer on raspberry-like SiO_(2) hollow nanocages with a hydrophobic surface(SiO_(2)@C-Ni).Owing to the high affinity between Ni and histine-rich protein,the resultant raspberry-like SiO_(2)@C-Ni composites exhibit good performance in the adsorption of His-rich protein.Moreover,by the galvanic replacement reaction between Ni and Pd2+,hollow structured SiO_(2)@C-PdNi composites are easily obtained,while endowing the SiO_(2)@C-PdNi composites with a hydrophilic surface,greatly beneficial for the catalysis reaction in the aqueous phase.More attractively,the synthetic strategy could be extended to the synthesis of other Nibased bimetallic alloy NPs,such as SiO_(2)@C-AgNi and SiO_(2)@C-AuNi composites.This work highlights the superiority of transition metal ion mediated RF chemistry,the sol–gel process and emulsifier-free polymerization in the ingenious design of hollow structured materials embedded with well-dispersed metal alloy NPs.展开更多
基金the financial support provided by the Natural Science Foundation of Shanghai City(18ZR1416400)the Fundamental Research Funds for the Central Universities(PA2020GDKC0005)the National Key R&D Program of China(no.2018YFC1801503).
文摘Ni(0)nanoparticles(NPs)are unstable and tend to aggregate in water,which poses a considerable challenge in their catalytic application.To overcome these drawbacks,integrated Ni-noble metal bimetallic NPs with a hollow-structured support are expected to enhance performances in heterogeneous catalysis.Herein,we present a simple approach for facile fabrication of Ni NPs embedded in a carbon layer on raspberry-like SiO_(2) hollow nanocages with a hydrophobic surface(SiO_(2)@C-Ni).Owing to the high affinity between Ni and histine-rich protein,the resultant raspberry-like SiO_(2)@C-Ni composites exhibit good performance in the adsorption of His-rich protein.Moreover,by the galvanic replacement reaction between Ni and Pd2+,hollow structured SiO_(2)@C-PdNi composites are easily obtained,while endowing the SiO_(2)@C-PdNi composites with a hydrophilic surface,greatly beneficial for the catalysis reaction in the aqueous phase.More attractively,the synthetic strategy could be extended to the synthesis of other Nibased bimetallic alloy NPs,such as SiO_(2)@C-AgNi and SiO_(2)@C-AuNi composites.This work highlights the superiority of transition metal ion mediated RF chemistry,the sol–gel process and emulsifier-free polymerization in the ingenious design of hollow structured materials embedded with well-dispersed metal alloy NPs.
