Title: Synthesis of V₂O₅ flowers/reduced graphene oxide mixtures for removal of hydrogen sulphide gas

Authors: Diep Ngoc Le; Thang Minh Bui; Nhu Quynh Thi Nguyen; Chien Mau Dang; Tin Chanh Duc Doan

Addresses: Institute for Nanotechnology, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, 700000, Vietnam

Abstract: This paper describes the combination of reduced graphene oxide (rGO) and V₂O₅ flower and its ability to adsorb H₂S. Graphite oxide was prepared using the Hummer method and then reduced to graphene oxide. The V₂O₅-rGO mixture was synthesised by the hydrothermal method, and the variation in the V₂O₅:GO ratio was studied to evaluate its influence on the structure of the material. The amount of rGO in the mixture varied from 2% to 20% according to the mass ratio of rGO : V₂O₅ used for the hydrothermal process. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and fourier-transform infrared spectroscopy (FTIR) were used to analyse the morphology, crystal structure, and chemical structure of V₂O₅-rGO, respectively. The V₂O₅-rGO mixture consists of 1-2 μm in diameter V₂O₅ flowers covered by layers of rGO. The V₂O₅-rGO mixture has the highest adsorption capacity of 2.64 mg/g after 50 min of adsorption.

Keywords: rGO; reduced graphene oxide; V₂O₅; flower-like; H₂S; adsorption.

DOI: 10.1504/IJNT.2024.146463

International Journal of Nanotechnology, 2024 Vol.21 No.7/8/9/10/11/12, pp.667 - 679

Published online: 30 May 2025 *

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