MOF‐Templated Synthesis of Ultrasmall Photoluminescent Carbon‐Nanodot Arrays for Optical Applications

Abstract

Arrays of ultrasmall and uniform carbon nanodots (CDs) are of pronounced interest for applications in optical devices. Herein, we describe a low-temperature calcination approach with rather inexpensive reactants. After glucose molecules had been loaded into the pores of metal-organic frameworks (MOFs), well-defined CD arrays were produced by heating to 200 °C. The size and spacing of the CDs could be controlled by the choice of templating MOF: HKUST-1, ZIF-8, or MIL-101. The sizes of the obtained CDs were approximately 1.5, 2.0, and 3.2 nm, which are close to the corresponding MOF pores sizes. The CD arrays exhibited interesting photophysical properties, including photoluminescence with tunable emission and pronounced nonlinear optical (NLO) effects. The NLO properties of the obtained CD arrays were significantly different from those of a CD suspension, thus indicating the existence of collective phenomena.

Highly Ordered N‐Doped Carbon Dots Photosensitizer on Metal–Organic Framework‐Decorated ZnO Nanotubes for Improved Photoelectrochemical Water Splitting

“…Additional peaks at 7.4°, 12.8°, 16.4°, and 18.1°, could be assigned to (110), (211), (310), and (222) planes of ZIF‐8. However, no XRD peaks for N‐CDs were observed in ZnO nanotubes with N‐CD embedded ZIF‐8 due to the possible overlap of weak peaks with strong peaks . In addition, the PXRD patterns (Figure c) identified the diffraction peaks at 7.4°, 10.4°, 12.8°, 14.6°, 16.4°, and 18.1° representing the reflections of (110), (200), (211), (220), (310), and (222) planes from the sodalite ZIF‐8, respectively .…”

Fe3O4/MIL‐101(Fe) nanocomposite as an efficient and recyclable catalyst for Strecker reaction

“…New porous metal‐organic frameworks (MOFs) offer innovative opportunities in scientific and technological fields by combining the profits of both inorganic and organic moieties, in which provide unique properties of high surface areas and well defined cavities or channels that can lead to potential applications in gas storage, separation, optical devices, sensors, drug delivery, and heterogeneous catalysis…”

2D Polymers as Emerging Materials for Photocatalytic Overall Water Splitting

“…Metal‐free carbon nanodots (CDots) exhibit unique properties in photoinduced electron transfer and electron reservoir, representing another class of 0D cocatalyst for photocatalysis . More importantly, CDots could efficiently promote the decomposition of H 2 O 2 .…”