Large-Scale and Controllable Synthesis of Graphene Quantum Dots from Rice Husk Biomass: A Comprehensive Utilization Strategy
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- 作者：Zhaofeng Wang ; Jingfang Yu ; Xin Zhang ; Na Li ; Bin Liu ; Yanyan Li ; Yuhua Wang ; Weixing Wang ; Yezhou Li ; Lichun Zhang ; Shanka Dissanayake ; Steven L. Suib ; Luyi Sun
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：January 20, 2016
- 年：2016
- 卷：8
- 期：2
- 页码：1434-1439
- 全文大小：394K
- ISSN：1944-8252
文摘
In this work, rice husk biomass was utilized as an abundant source to controllably prepare high-quality graphene quantum dots (GQDs) with a yield of ca. 15 wt %. The size, morphology, and structure of the rice-husk-derived GQDs were determined by high-resolution transmission electron microscopy, atomic force microscopy, and Raman spectroscopy. The as-fabricated GQDs can be stably dispersed in water, exhibiting bright and tunable photoluminescence. A cell viability test further confirmed that the GQDs possess excellent biocompatibility, and they can be easily adopted for cell imaging via a facile translocation into the cytoplasm. It is worth noting that mesoporous silica nanoparticles were also synthesized as a byproduct during the fabrication of GQDs. As such, our strategy achieves a comprehensive utilization of rice husks, exhibiting tremendous benefits on both the economy and environment.