title: Cross-linked lysozyme crystal templated synthesis of Au nanoparticles as high-performance recyclable catalysts.
abstract: Bio-nanomaterials fabricated using a bioinspired templating technique represent a novel class of composite materials with diverse applications in biomedical, electronic devices, drug delivery, and catalysis. In this study, Au nanoparticles (NPs) are synthesized within the solvent channels of cross-linked lysozyme crystals (CLLCs) in situ without the introduction of extra chemical reagents or physical treatments. The as-prepared AuNPs-in-protein crystal hybrid materials are characterized by light microscopy, transmission electron microscopy, x-ray diffraction, and Fourier-transform infrared spectroscopy analyses. Small AuNPs with narrow size distribution reveal the restriction effects of the porous structure in the lysozyme crystals. These composite materials are proven to be active heterogeneous catalysts for the reduction of 4-nitrophenol to 4-aminophenol. These catalysts can be easily recovered and reused at least 20 times because of the physical stability and macro-dimension of CLLCs. This work is the first to use CLLCs as a solid biotemplate for the preparation of recyclable high-performance catalysts.
authors.affiliation: State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Nankai District, Tianjin, People's Republic of China.
authors.forename: Miao
authors.initials: M
authors.lastname: Liang
authors.forename: Libing
authors.initials: L
authors.lastname: Wang
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Qi
authors.forename: Rongxin
authors.initials: R
authors.lastname: Su
authors.forename: Renliang
authors.initials: R
authors.lastname: Huang
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Yu
authors.forename: Zhimin
authors.initials: Z
authors.lastname: He
mesh_terms: D000627:Aminophenols / Q000378:metabolism; D002384:Catalysis; D003432:Cross-Linking Reagents / Q000378:metabolism*; D003460:Crystallization; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009113:Muramidase / Q000378:metabolism*; D009596:Nitrophenols / Q000378:metabolism; D059027:Recycling; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D000627:Aminophenols; D003432:Cross-Linking Reagents; D009596:Nitrophenols; D006046:Gold; D009113:Muramidase; C026729:4-aminophenol; C024836:4-nitrophenol