Novel lignin-based phenolic nanosphere supported palladium nanoparticles with highly efficient catalytic performance and good reusability
Novel lignin-based phenolic nanosphere supported palladium nanoparticles with highly efficient catalytic performance and good reusability
复制标题
新型木质素基酚醛纳米球负载钯纳米粒子，具有高效催化性能和良好的可重复使用性
DOI：
10.1016/j.indcrop.2020.112164
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发表时间：
2020-03-01
影响因子：
5.9
通讯作者：
Si, Chuanling
中科院分区：
文献类型：
--
作者：
Chen, Shilin;Wang, Guanhua;Si, Chuanling
木质素是最丰富的芳香族生物聚合物，在酚醛树脂合成中作为可持续的苯酚替代物具有很大的潜力，这被认为是木质素增值的最有前途的选择之一。在这项工作中，硫酸盐木质素从竹子被用作苯酚的替代品的制造新型木质素基酚醛树脂（LPR）纳米球使用一个简单的水热过程。然后将所制备的LPR纳米球用作还原剂和稳定载体用于合成Pd纳米颗粒（NPs）。结果表明，木质素取代40%的苯酚后，纳米球的粒径明显减小，表面粗糙度增加，比表面积增加。由于木质素的比表面积增加和优异的还原活性，所制备的LPR纳米球与不含木质素的PR载体相比具有相当高的Pd NPs负载量。因此，所制备的Pd@LPR纳米复合材料对有毒的Cr（VI）和两种典型染料的还原表现出高效的催化能力.此外，Pd@LPR纳米复合材料表现出优异的可重复使用性，由于稳定负载的Pd NPs的木质素基载体。因此，木质素为基础的纳米球，通过一个简单的水热过程中制备，被用作还原剂和Pd纳米粒子的合成载体，这提出了一种新的方法来开发木质素功能化的催化剂材料。
Lignin, the most abundant aromatic biopolymer, has great potential as a sustainable phenol replacement in phenolic resin synthesis, which has been considered as one of the most promising options for lignin valorization. In this work, kraft lignin from bamboo was used as a phenol substitute for the fabrication of novel lignin-based phenolic resin (LPR) nanosphere using a facile hydrothermal process. The as-prepared LPR nanosphere was then used as a reducing agent and a stabilizing support for synthesis of Pd nanoparticles (NPs). It was found that 40 % replacement of phenol by lignin led to a significant decrease of the nanosphere size and enhancement of the nanosphere surface roughness, which eventually increased the specific surface area of LPR nanosphere. Owing to the enhanced specific surface area and the excellent reducing activity of lignin, the as-prepared LPR nanosphere had considerably higher Pd NPs loading amount compared with the lignin-free PR support. Therefore, the asprepared Pd@LPR nanocomposites demonstrated highly efficient catalytic ability for the reduction of toxic Cr (VI) and two typical dyes. Moreover, the Pd@LPR nanocomposites exhibited excellent reusability owing to the stable loading of Pd NPs on the lignin-based support. Consequently, the lignin-based nanosphere, prepared by a facile hydrothermal process, is used as a reducing agent and a support for Pd NPs synthesis, which presents a novel approach to develop lignin-functionalized catalyst materials.