Phosphorus induced crystallinity in carbon dots for solar light assisted seawater desalination

Pal, Ayan ; Natu, Gayatri ; Ahmad, Kafeel ; Chattopadhyay, Arun (2018) Phosphorus induced crystallinity in carbon dots for solar light assisted seawater desalination Journal of Materials Chemistry A, 6 (9). pp. 4111-4118. ISSN 2050-7488

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Official URL: http://doi.org/10.1039/C7TA10224K

Related URL: http://dx.doi.org/10.1039/C7TA10224K

Abstract

A highly ordered crystalline structure in carbon dots (Cdots) can substantially enhance the gamut of their applications in conversion, transfer and transport of energy; however, achievement of such crystallinity in a controlled manner has been elusive. We report here a facile method for the synthesis of highly crystalline doped Cdots of an average size of 2.8 ± 0.8 nm, that contain nitrogen, sulphur and phosphorus heteroatoms (N,S,P-Cdots). The extent of crystallinity was dependent on the phosphorus content in the doped Cdots. We attempt to understand the nature of phosphorus doping into carbon nanostructures (N,S,P-Cdots) via spectroscopic and microscopic techniques. Based on computational refinement of the powder X-ray diffraction pattern via the LeBail method we propose an orthorhombic crystal structure for N,S,P-Cdots. Importantly, the crystallinity in N,S,P-Cdots significantly enhanced the bulk solar photothermal evaporation efficiency to 83.6%. This phenomenon was further applied towards successful and efficient solar-based seawater desalination.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry
ID Code:135443
Deposited On:24 Jan 2023 05:29
Last Modified:24 Jan 2023 05:29

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