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Incorporation of well-dispersed sub-5-nm graphitic pencil nanodots into ordered mesoporous frameworks

TitleIncorporation of well-dispersed sub-5-nm graphitic pencil nanodots into ordered mesoporous frameworks
Publication TypeJournal Article
Year of Publication2016
AuthorsKong, Biao, Tang Jing, Zhang Yueyu, Jiang Tao, Gong Xingao, Peng Chengxin, Wei Jing, Yang Jianping, Wang Yongcheng, Wang Xianbiao, Zheng Gengfeng, Selomulya Cordelia, and Zhao Dongyuan
JournalNature Chemistry
Volume8
Pagination171–178
Date Published02/2016
Abstract

Over the past few decades the direct assembly of optical nanomaterials into ordered mesoporous frameworks has proved to be a considerable challenge. Here we propose the incorporation of ultrasmall (sub-5-nm) graphitic pencil nanodots into ordered mesoporous frameworks for the fabrication of optoelectronic materials. The nanodots, which were prepared from typical commercial graphite pencils by an electrochemical tailoring process, combine properties such as uniform size (similar to 3 nm), excellent dispersibility and high photoconversion efficiency (similar to 27%). These nanodots were incorporated into a variety of ordered mesoporous frameworks (TiO2, silica, carbon and silica-carbon materials) by co-assembly, driven by hydrogen bonding, with the frameworks' precursors. The resulting materials showed a high degree of ordering, and a sharp increase in their optical performance (for example, photocurrent density). We envisage that the large-scale synthesis of ultrasmall carbon nanodots and their incorporation into ordered mesoporous frameworks may facilitate the preparation of materials with a variety of optical properties.

DOI10.1038/NCHEM.2405

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