Thermal and pH Dual Responsive Copolymer and Silver Nanoparticle Composite for Catalytic Application
Luqman Ali Shah
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
Search for more papers by this authorWulian Chen
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Search for more papers by this authorMohammad Siddiq
Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
Search for more papers by this authorJianhua Hu
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Search for more papers by this authorAngang Dong
Department of Chemistry, Fudan University, Shanghai 200433, China
Search for more papers by this authorCorresponding Author
Dong Yang
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, Tel.: 0086-021-65643575; Fax: 0086-021-65640293Search for more papers by this authorLuqman Ali Shah
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
Search for more papers by this authorWulian Chen
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Search for more papers by this authorMohammad Siddiq
Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
Search for more papers by this authorJianhua Hu
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
Search for more papers by this authorAngang Dong
Department of Chemistry, Fudan University, Shanghai 200433, China
Search for more papers by this authorCorresponding Author
Dong Yang
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China, Tel.: 0086-021-65643575; Fax: 0086-021-65640293Search for more papers by this authorAbstract
N-Isopropylacrylamide and vinyl imidazole copolymer, P(NIPAM-co-VI), was synthesized by free radical emulsion polymerization. Then, the copolymer and silver nanoparticle composite, P(NIPAM-co-VI)-Ag, was prepared by in situ reduction of AgNO3 with NaBH4. Due to the coexistence of thermal-responsive PNIPAM and pH-responsive PVI, P(NIPAM-co-VI) and P(NIPAM-co-VI)-Ag exhibited both thermal and pH responsibility, their size would change while altering the temperature or pH of the circumvent. Their thermal and pH dual responsive properties were studied by dynamic light scattering (DLS). P(NIPAM-co-VI)-Ag could be stably dispersed in water at a pH range from 3.0 to 9.3, which is favorable to use P(NIPAM-co-VI)-Ag as a catalyst in the reduction reaction of p-nitrophenol. The reaction rate constant (kapp) increased with the decrease of pH or the increase of VI content in the copolymer.
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