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Polydopamine Nanotubes Decorated with Ag Nanoparticles as Catalyst for the Reduction of Methylene Blue
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-12-27 , DOI: 10.1021/acsanm.9b01861
Jingyu Lu 1 , Jinchao Fang 1 , Jiaqi Li 1 , Chenhe Wang 1 , Zijie He 1 , Liping Zhu 1 , Zhikang Xu 1 , Hongbo Zeng 2
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-12-27 , DOI: 10.1021/acsanm.9b01861
Jingyu Lu 1 , Jinchao Fang 1 , Jiaqi Li 1 , Chenhe Wang 1 , Zijie He 1 , Liping Zhu 1 , Zhikang Xu 1 , Hongbo Zeng 2
Affiliation
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In the present work, polydopamine nanotubes (PDA NTs) decorated with silver (Ag) nanoparticles (NPs) were successfully fabricated via a template induced self-polymerization of dopamine, followed by in situ reduction and immobilization of NPs from nitrate solution. The typical [email protected] NTs exhibits 39.1 wt % of Ag content and excellent catalytic activity as demonstrated by the reduction of a model organic pollutant, methylene blue, with an apparent rate constant of 3.19 min–1 in the first-order kinetics model, which is the highest value reported so far. The superior catalytic performance is attributed to the high Ag loading, uniform distribution of NPs, and excellent dispersity in water. Moreover, it is believed that the superhydrophilic hollow morphology of PDA NTs with ultrahigh porosity (81.4%) and open ends facilitates the contact of the catalysts with reactant molecules and mass transfer in aqueous reaction. The [email protected] NTs nanocatalysts could be easily recycled, and the catalytic efficiency remained nearly unchanged over 10 cycles. This synthetic strategy was proved to be applicable to other typical metal catalysts (e.g., Pt, Pd, Au). This work presents a universal approach to fabricate highly efficient nanocatalysts with PDA NTs as supports used for the reduction and degradation of organic dyes.
中文翻译:
银纳米粒子修饰的聚多巴胺纳米管作为还原亚甲基蓝的催化剂
在目前的工作中,通过模板诱导的多巴胺自聚合,然后从硝酸盐溶液中原位还原和固定化NP,成功地制备了装饰有银(Ag)纳米粒子(NP)的聚多巴胺纳米管(PDA NT)。典型的[受电子邮件保护的] NTs表现出39.1 wt%的银含量和出色的催化活性,如模型有机污染物亚甲基蓝的还原所证实,其表观速率常数为3.19 min –1在一级动力学模型中,这是迄今为止报道的最高值。优异的催化性能归因于高的Ag负载量,NPs的均匀分布以及在水中的出色分散性。此外,据信具有超高孔隙率(81.4%)和开放端的PDA NTs的超亲水空心形态促进了催化剂与反应物分子的接触以及在水反应中的质量转移。受[电子邮件保护]的NTs纳米催化剂可以轻松回收利用,并且在10个循环中其催化效率几乎保持不变。事实证明,这种合成策略适用于其他典型的金属催化剂(例如Pt,Pd,Au)。这项工作提出了一种通用的方法,用PDA NTs作为还原和降解有机染料的载体来制备高效的纳米催化剂。
更新日期:2019-12-27
中文翻译:
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银纳米粒子修饰的聚多巴胺纳米管作为还原亚甲基蓝的催化剂
在目前的工作中,通过模板诱导的多巴胺自聚合,然后从硝酸盐溶液中原位还原和固定化NP,成功地制备了装饰有银(Ag)纳米粒子(NP)的聚多巴胺纳米管(PDA NT)。典型的[受电子邮件保护的] NTs表现出39.1 wt%的银含量和出色的催化活性,如模型有机污染物亚甲基蓝的还原所证实,其表观速率常数为3.19 min –1在一级动力学模型中,这是迄今为止报道的最高值。优异的催化性能归因于高的Ag负载量,NPs的均匀分布以及在水中的出色分散性。此外,据信具有超高孔隙率(81.4%)和开放端的PDA NTs的超亲水空心形态促进了催化剂与反应物分子的接触以及在水反应中的质量转移。受[电子邮件保护]的NTs纳米催化剂可以轻松回收利用,并且在10个循环中其催化效率几乎保持不变。事实证明,这种合成策略适用于其他典型的金属催化剂(例如Pt,Pd,Au)。这项工作提出了一种通用的方法,用PDA NTs作为还原和降解有机染料的载体来制备高效的纳米催化剂。