Koga Hirotaka, Namba Naoko, Takahashi Tsukasa, Nogi Masaya, Nishina Yuta
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
Research Core for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan.
ChemSusChem. 2017 Jun 22;10(12):2560-2565. doi: 10.1002/cssc.201700576. Epub 2017 May 4.
Continuous-flow nanocatalysis based on metal nanoparticle catalyst-anchored flow reactors has recently provided an excellent platform for effective chemical manufacturing. However, there has been limited progress in porous structure design and recycling systems for metal nanoparticle-anchored flow reactors to create more efficient and sustainable catalytic processes. In this study, traditional paper is used for a highly efficient, recyclable, and even renewable flow reactor by tailoring the ultrastructures of wood pulp. The "paper reactor" offers hierarchically interconnected micro- and nanoscale pores, which can act as convective-flow and rapid-diffusion channels, respectively, for efficient access of reactants to metal nanoparticle catalysts. In continuous-flow, aqueous, room-temperature catalytic reduction of 4-nitrophenol to 4-aminophenol, a gold nanoparticle (AuNP)-anchored paper reactor with hierarchical micro/nanopores provided higher reaction efficiency than state-of-the-art AuNP-anchored flow reactors. Inspired by traditional paper materials, successful recycling and renewal of AuNP-anchored paper reactors were also demonstrated while high reaction efficiency was maintained.
基于金属纳米颗粒催化剂固定流动反应器的连续流纳米催化技术，最近为高效化学制造提供了一个极佳的平台。然而，在金属纳米颗粒固定流动反应器的多孔结构设计和循环系统方面，进展有限，难以创造出更高效、可持续的催化过程。在本研究中，通过对木浆超微结构进行剪裁，将传统纸张用于构建高效、可循环甚至可再生的流动反应器。“纸反应器”具有分级互连的微米和纳米级孔隙，分别可作为对流和快速扩散通道，使反应物能够高效接触金属纳米颗粒催化剂。在连续流、水相、室温条件下将4-硝基苯酚催化还原为4-氨基苯酚的反应中，具有分级微/纳米孔隙的金纳米颗粒（AuNP）固定纸反应器比最先进的AuNP固定流动反应器具有更高的反应效率。受传统纸材料启发，还展示了AuNP固定纸反应器在保持高反应效率的同时成功实现循环和更新。
