Effects of ultrasonic treatment on aqueous suspensions of diamond nanopowders
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Published:2023-06-30
Issue:2
Volume:14
Page:223-229
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ISSN:2079-1704
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Container-title:Himia, Fizika ta Tehnologia Poverhni
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language:
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Short-container-title:Him. Fiz. Tehnol. Poverhni
Author:
Ilnytska G. D., ,Loginova O. B.,Starik S. P.,Lisovenko S. O.,Bazaliy G. A.,Tsyba N. N., , , , ,
Abstract
It has been found that ultrasonic treatment of diamond nanopowders contributes to surface cleaning due to the removal of non-diamond carbon and impurities from the surface boundary of nanodiamond grains (from 0.4 and 0.32 % for ASUD-99 and 0.67 and 0.55 % for ASUD 75, respectively). It does not affect the total sorption volume and the values of the specific surface of the studied samples do not change, but it changes the composition of groups on the surface of diamond nanoparticles, which affect its hydrophilicity. In the samples of АSUD-75 after ultrasonic treatment, a redistribution of the ratio of the intensities of valence vibrations of С=О bonds in the lactone (anhydride) group (1742 cm–1) and the quinone (carboxyl) group (1683 cm–1) is observed, which indicates the decay of the lactone ring and its transformation into carbonyl and carboxyl groups. All samples of АSUD-99 have a hydroxyl group O-H (3400 cm−1), which does not change significantly under the influence of ultrasound. This explains the noticeable change in agglomeration for ASUD-75 in contrast to ASUD 99.
Publisher
National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)
Subject
Materials Chemistry,Colloid and Surface Chemistry,Physical and Theoretical Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Ceramics and Composites
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