Dong Youming, Wang Kaili, Tan Yi, Wang Qingchun, Li Jianzhang, Mark Hughes, Zhang Shifeng
MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing, 100083, China.
Wood Material Technology, Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, 02150, Espoo, Finland.
Nanoscale Res Lett. 2018 Apr 24;13(1):119. doi: 10.1186/s11671-018-2543-0.
The inherent sophisticated structure of wood inspires researchers to use it as a natural template for synthesizing functional nanoparticles. In this study, pure copper nanoparticles were synthesized using poplar wood as a natural inexpensive and renewable template. The crystal structure and morphologies of the copper nanoparticles were characterized by X-ray diffraction and field emission scanning electron microscopy. The optical properties, antibacterial properties, and stability of the hybrid wood materials were also tested. Due to the hierarchical and anisotropic structure and electron-rich components of wood, pure copper nanoparticles with high stability were synthesized with fcc structure and uniform sizes and then assembled into corncob-like copper deposits along the wood cell lumina. The products of nanoparticles depended strongly on the initial OH concentration. With an increase in OH concentration, CuO gradually decreased and Cu remained. Due to the restrictions inherent in wood structure, the derived Cu nanoparticles showed similar grain size in spite of increased Cu concentration. This combination of Cu nanostructures and wood exhibited remarkable optical and antibacterial properties.
木材固有的复杂结构激发了研究人员将其用作合成功能性纳米颗粒的天然模板。在本研究中，以杨木为天然、廉价且可再生的模板合成了纯铜纳米颗粒。通过X射线衍射和场发射扫描电子显微镜对铜纳米颗粒的晶体结构和形貌进行了表征。还测试了杂化木材材料的光学性能、抗菌性能和稳定性。由于木材的分级和各向异性结构以及富含电子的成分，合成了具有面心立方结构、尺寸均匀且稳定性高的纯铜纳米颗粒，然后沿木材细胞腔组装成玉米芯状的铜沉积物。纳米颗粒的产物在很大程度上取决于初始OH浓度。随着OH浓度的增加，CuO逐渐减少而Cu保留下来。由于木材结构固有的限制，尽管铜浓度增加，衍生的铜纳米颗粒仍显示出相似的晶粒尺寸。这种铜纳米结构与木材的组合表现出显著的光学和抗菌性能。
