State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of High Performance Fibers and Products (Ministry of Education), College of Materials Science and Engineering, Donghua University, Shanghai, 201620, PR China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of High Performance Fibers and Products (Ministry of Education), College of Materials Science and Engineering, Donghua University, Shanghai, 201620, PR China.
Carbohydr Polym. 2017 Mar 15;160:34-42. doi: 10.1016/j.carbpol.2016.12.020. Epub 2016 Dec 9.
A novel nanohybrid was successfully fabricated by deposition of gold nanoparticles (AuNPs) onto the surface of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized bacterial cellulose nanofibers (TOBCNs). The prepared AuNPs/TOBCNs nanohybrids were characterized by UV-vis spectral analysis, XRD, TEM and HRTEM. Their catalytic activity for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) was estimated by UV-vis spectrometry. The results showed that the AuNPs/TOBCNs nanohybrids possessed AuNPs with an average diameter of 4.30±0.97nm exhibited superior catalytic properties for the reduction of 4-NP to 4-AP. The influences of the content of reducing agent and system temperature on the catalytic property were studied. Moreover, the turnover frequency of AuNPs/TOBCNs was 750h, which is higher than most recently reported AuNPs-based catalysts. This work reported a heterogeneous catalyst based on TOBCNs supported AuNPs with superior catalytic properties.
一种新型纳米杂化材料通过将金纳米粒子（AuNPs）沉积在 2,2,6,6-四甲基哌啶-1-氧自由基（TEMPO）氧化的细菌纤维素纳米纤维（TOBCNs）表面上成功制备。所制备的 AuNPs/TOBCNs 纳米杂化物通过紫外可见光谱分析、XRD、TEM 和 HRTEM 进行了表征。通过紫外可见光谱法评估了它们对 4-硝基苯酚（4-NP）还原为 4-氨基酚（4-AP）的催化活性。结果表明，AuNPs/TOBCNs 纳米杂化物具有平均直径为 4.30±0.97nm 的 AuNPs，表现出对 4-NP 还原为 4-AP 的优异催化性能。研究了还原剂含量和体系温度对催化性能的影响。此外，AuNPs/TOBCNs 的周转频率为 750h，高于最近报道的大多数基于 AuNPs 的催化剂。这项工作报道了一种基于具有优异催化性能的 TOBCNs 负载的 AuNPs 的多相催化剂。
