Catalytic Membrane Reactor Immobilized with Alloy Nanoparticle-Loaded Protein Fibrils for Continuous Reduction of 4-Nitrophenol.
A catalytic membrane reactor, which contains a membrane matrix and a catalytic film of alloy nanoparticle-loaded β-lactoglobulin fibrils (NPs@β-LGF), was developed for the continuous-flow reduction of 4-nitrophenol (4-NP). The Cu-Ag and Cu-Ag-Au alloy NPs were synthesized using β-LGF as a scaffold and stabilizing agent. In this process, the Cu nanoclusters were formed in the initial stage and were able to promote the synthesis of Ag0, which acts as a reducing agent for the rapid formation of Au0. Furthermore, a catalytic membrane reactor was constructed by depositing the NPs@β-LGFs on a membrane matrix. The catalytic activity of the Cu-Ag-Au alloy NPs was higher than that of the Cu-Ag alloy NPs, using the reduction of 4-NP to 4-AP as a model reaction. The observed rate constant in the continuous-flow system is also higher than that in the batch system. In addition, these catalytic membrane reactors had good operating stability and antibacterial activity.
Renliang
R
Huang
Hongxiu
H
Zhu
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, PR China.
Rongxin
R
Su
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, PR China.
Wei
W
Qi
Zhimin
Z
He
D000497:Alloys; D019149:Bioreactors; D002384:Catalysis; D053758:Nanoparticles; D009596:Nitrophenols; D011506:Proteins / Q000737:chemistry
D000497:Alloys; D009596:Nitrophenols; D011506:Proteins; C024836:4-nitrophenol