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Synthesis and Characterization of EG/Au Composites via Thermal Exfoliation of Graphite Intercalation Compounds with Tetrachloroauric Acidстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 1 октября 2025 г.
- Авторы: Muravev Aleksandr D., Ivanov Andrei V., Mukhanov Vladimir A., Kulnitskiy Boris A., Maksimova Natalia V., Avdeev Victor V.
- Журнал: Nanomaterials
- Том: 15
- Год издания: 2025
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Первая страница: 1363
- Последняя страница: 1363
- DOI: 10.3390/nano15171363
- Аннотация: This study demonstrates a novel route to synthesize gold-decorated exfoliated graphite (EG) through graphite intercalation compounds (GICs) with tetrachloroauric acid (HAuCl4). We aimed to develop a scalable method for producing EG/Au composites with controlled nanoparticle morphology by investigating the effects of precursor chemistry and thermal expansion conditions. 2-stage GIC-HAuCl4 (average composi-tion: C23HAuCl4; intercalate layer thickness di = 6.85 Å) was prepared via an exchange reaction of HAuCl4 with graphite nitrate. Interaction of this GIC with liquid methyla-mine yielded an occlusive complex, where methylamine-bound HAuCl4 occupies both interlayer and intercrystalline spaces in the graphite matrix. Methylamine treatment of GIC reduces the onset temperature of exfoliation by ≈ 100 oC and enhances expansion efficiency, yielding EG with low bulk density of 4-6 g/L when processed at 900 oC in air or nitrogen. Thermal exfoliation of these GICs yielded EG decorated with gold nano-particles, exhibiting a broad size distribution from a few nanometers to several hundred nanometers, as confirmed by electron microscopy. X-ray diffraction analysis identifies the coexistence of crystalline gold and hexagonal graphite phases, with no detectable impurity phases. Цитирование: Muravev A.D., Ivanov A.V., Mukhanov V.A., Kulnitskiy B.A., Maksimova N.V., Avdeev V.V. Preparation of exfoliated graphite decorated with gold nano-particles by thermal treatment of graphite intercalation com-pounds with tetrachloroauric acid. // Nanomaterials. 2025. V. 15. P. 1363. DOI: 10.3390/nano15171363 ; Received: 11 August 2025; Revised: 27 August 2025; Accepted: 2 September 2025; Published: 4 September 2025. Дата и номер экспертного заключения: 25.07.2025 № 112.2545.2025
- Добавил в систему: Иванов Андрей Владимирович
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