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

Nature Chemistry
Biao KongDongyuan Zhao

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 (∼3 nm), excellent dispersibility and high photoconversion efficiency (∼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.

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Citations

Jan 14, 2017·Journal of the American Chemical Society·Jing WeiDongyuan Zhao
Feb 28, 2019·Advanced Materials·Yongyang SongShutao Wang
Apr 6, 2017·Angewandte Chemie·Siyu LuBai Yang
Nov 15, 2019·Chemistry : a European Journal·Yu ShaoWen-Bin Zhang
Feb 19, 2020·Chemical Communications : Chem Comm·Yu WenJiangong Cheng
May 27, 2020·Angewandte Chemie·Hongyue ZhangJihong Yu
Jul 9, 2016·Chemical Communications : Chem Comm·Yi WangRongqin Huang
Jul 4, 2017·Particle & Particle Systems Characterization : Measurement and Description of Particle Properties and Behavior in Powders and Other Disperse Systems·Yangyang LiChuanbin Mao
Dec 21, 2017·Nature Communications·Chenlong ChenKui Xie
Sep 8, 2016·Angewandte Chemie·Shaohua LiuXinliang Feng
Sep 28, 2016·Nanotechnology·Xiahui LiuJiangtao Chen
Nov 4, 2020·Journal of the American Chemical Society·Tiancong ZhaoDongyuan Zhao
Aug 28, 2021·Nanomaterials·Spyridon Gavalas, Antonios Kelarakis
Sep 4, 2021·Nanoscale·Dragana ParipovićHolger Frauenrath
Oct 6, 2021·Chemical Reviews·Linlin DuanDongyuan Zhao

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