Cost-effective route to nanodiamonds from low-rank coal and their fluorescent & dielectric characteristics

Title

Cost-effective route to nanodiamonds from low-rank coal and their fluorescent & dielectric characteristics

Creator

Raj A.M.; Manoj B.

Description

The synthesis of nanodiamonds from abundant and inexpensive precursors has recently piqued the curiosity of researchers. It has the potential to significantly reduce the cost of nanodiamonds and open up a plethora of new applications. In this work, fluorescent nanodiamonds with smaller particle sizes with rich surface functionality are synthesized from low-grade coal lignite by employing a facile acidic oxidation and ultrasonication approach. The extracted nanodiamond particles are hydrophilic and display high excitation-dependent fluorescence in the aqueous medium. The excitation-dependent fluorescence can be ascribed to the collaboration and competition of the OH and COOH functional groups. The as-synthesized nanodiamonds also show good dielectric permittivity and ac conductivity over a wide frequency range at room temperature. The present research opens up the possibility of mass production of nanodiamonds on the industrial scale from a low-cost precursor. 2021

Source

Ceramics International, Vol-48, No. 1, pp. 887-895.

Date

2022-01-01

Publisher

Elsevier Ltd

Subject

Coal; Conductivity; Dielectric; Fluorescence; Nanodiamonds

Coverage

Raj A.M., Department of Physics & Electronics, Christ (Deemed to be University), Bengaluru, 560029, India; Manoj B., Department of Physics & Electronics, Christ (Deemed to be University), Bengaluru, 560029, India

Rights

Restricted Access

Relation

ISSN: 2728842; CODEN: CINND

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1016/j.ceramint.2021.09.171

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115772704&doi=10.1016%2fj.ceramint.2021.09.171&partnerID=40&md5=c7389992dbd3df5530a71eeeaa12e456