Green synthesis of sheet-like cellulose nanocrystal–zinc oxide nanohybrids with multifunctional performance through one-step hydrothermal method
writer：Somia Yassin Hussain Abdalkarim.Hou-Yong Yu .Chuang Wang. Lin-Xi Huang.Juming Yao
keywords：Cellulose nanocrystal - ZnO nanohybrids - Photocatalytic activity - Antimicrobial ratio
source：期刊
Issue time：2018年
In the present study, we report novel sheet-like cellulose nanocrystal–zinc oxide nanohybrids (CNC–ZnO) by using a one-step hydrothermal method. Various concentrations of Zn2+ ions were functionalized in CNC surface and a possible mechanism for the formation of CNC–ZnO nanohybrids with hexagonal sheet-like structure converted to the flower-like structure was also presented. Additionally, the sheet-like CNC–ZnO 5.0 showed good antimicrobial activity, excellent thermal stability and high photocatalytic activity of 95.21% of methylene blue dye was decomposed after 200 min under UV light irradiation. More significantly, the CNC–ZnO 5.0 nanohybrid can be recycled three times with good Turnover frequency values. Compared to pure CNC, the maximum degradation temperature (Tmax) of sheet-like nanocrystal–zinc oxide nanohybrid with the addition of 5 mmol Zn2+ ions (CNC–ZnO 5.0) nanohybrid was improved by 23.1 °C, and its limiting oxygen index increased up to 49.6%. This work provides a simple preparation procedure of sheet-like CNC–ZnO nanohybrids with good antimicrobial, photocatalytic and thermal properties for attractive applications as biomedical materials and flame-retardants.