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Fallatah, Ahmed M.
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article
Manganese doped Co<sub>3</sub>O<sub>4</sub>/rGO nanocomposite: synthesis, characterisation and visible light irradiated photocatalytic degradation of methylene blue studies
Abstract
<jats:title>Abstract</jats:title><jats:p>Visible light active, highly stable, nontoxic, and efficient photocatalysts based on 1 %, 3 %, and 5 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> were synthesized and functionalized with reduced graphene oxide. The X-rays diffraction (XRD) spectroscopy and FT-IR spectroscopy were employed for structural and functional group studies. Under visible light irradiation, photocatalytic activities of 1 %, 3 %, and 5 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/rGO nanocomposites were studied for the degradation of organic pollutant methylene blue. Almost 85.4 %, 90.2 %, and 93.4 % degradation of methylene blue were observed after 80 min with 1 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/rGO, 3 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/rGO, and 5 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/rGO respectively. The prepared nanocomposites followed pseudo-first-order kinetic studies. Among all samples, the 5 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/rGO showed maximum degradation of 93.4 % in 80 min. Moreover, 5 % Mn@Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>/rGO nanocomposite maintained its excellent dye degradation ability even after three cycles.</jats:p>