A facile strategy has been developed for the preparation of novel silver/poly(styrene-N-isopropylacrylamide-methacrylic acid) (Ag/PSNM) nanocomposite spheres with high catalytic activity and good storage stability. Silver (Ag) nanoparticles are successfully deposited on poly(styrene-N-isopropylacrylamide-methacrylic acid) (PSNM) spheres surfaces via in situ reduction and simultaneously protected by polyvinylpyrrolidone (PVP). The prepared Ag/PSNM nanocomposite spheres show good temperature/pH responsive property and improved thermal property. Moreover, they also exhibit high catalytic activity and good recyclability for the catalytic reduction of methylene blue (MB) to leuco methylene blue (LMB). The result of clock reaction indicate that the redox reaction generates a colorless (LMB) solution which easily reverts back to blue (MB) in air. The catalytic activity increase with the increasing of temperature and the reaction rate constant (k) follows the typical Arrhenius-type dependence on temperature. In addition, the prepared Ag/PSNM nanocomposite spheres show good storage stability and the catalytic activity remains almost unchanged after storage for 90 days at room temperature. Therefore, the prepared Ag/PSNM nanocomposite spheres can have a highly potential use in the catalytic degradation of organic dyes in wastewater treatment applications.

已开发出一种简便的策略来制备具有高催化活性和良好储存稳定性的新型银/聚（苯乙烯-N-异丙基丙烯酰胺-甲基丙烯酸）（Ag / PSNM）纳米复合球。银（Ag）纳米粒子通过原位成功沉积在聚（苯乙烯-N-异丙基丙烯酰胺-甲基丙烯酸）（PSNM）球表面上还原并同时受到聚乙烯吡咯烷酮（PVP）的保护。制备的Ag / PSNM纳米复合球具有良好的温度/ pH响应特性和改善的热性能。此外，它们还显示出高催化活性和良好的可回收性，可将亚甲基蓝（MB）催化还原为无色亚甲基蓝（LMB）。时钟反应的结果表明，氧化还原反应生成了无色（LMB）溶液，该溶液很容易在空气中恢复为蓝色（MB）。催化活性随温度的升高而增加，反应速率常数（k）遵循典型的阿累尼乌斯型温度依赖性。另外，制备的Ag / PSNM纳米复合球显示出良好的储存稳定性，并且在室温下储存90天后催化活性几乎保持不变。所以，