title: Preparation and catalytic performance of temperature-responsive cell-like particles.
abstract: A novel kind of cell-like particles as temperature-responsive catalysts was presented in this paper. First, uniform α-Fe₂O₃shuttle-like nanoparticles were prepared by homogeneous hydrolysis. Then, these α-Fe₂O₃particles were coated by Au nanoparticles (AuNPs), SiO₂and poly (N-isopropylacrylamide) (PNIPAM), respectively. After the removal of SiO₂layer by etching with HF solution, the cell-like particles were prepared when the α-Fe₂O₃, AuNPs, and PNIPAM were as cell nucleus, catalysts, and cell membranes, respectively. These cell-like particles showed a novel temperature-responsively catalytic performance because the PNIPAM shell could change its hydrophilicity and swelling capacity under different temperature. When the temperature was 25°C, the yield of 4-aminophenol (4-AP) from 4-nitrophenol (4-NP) by reduction of NaBH₄was about 100% in 15 min, while the yield of 4-AP was about 90.5% in 40 min. when the temperature was 40°C.
authors.affiliation: Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China.
authors.forename: Qiufeng
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Dai
authors.affiliation: Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Guo
authors.affiliation: Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Chu
authors.affiliation: Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, USA.
authors.forename: Guangping
authors.initials: G
authors.lastname: Chen
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D002384:Catalysis; D006046:Gold; D053768:Metal Nanoparticles / Q000737:chemistry*; D013696:Temperature
chemical_list: D000180:Acrylic Resins; C052970:poly-N-isopropylacrylamide; D006046:Gold