Browsing by Author "Prabhu Teja, K."

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    Visible Light Mediated Photocatalytic Reduction of CO2 to Non-fossil Fuel and Valuable Products by Polyaniline-TiO2 Nanocomposites
    (Springer Science and Business Media Deutschland GmbH, 2022) Prabhu Teja, K.; Shetty K, V.
    CO2, a major contributor for global warming may be considered as a free source of carbon and can be converted into hydrocarbons. Mimicking the photosynthesis process that utilizes light energy to convert CO2, is the favorable option, and solar energy may be harnessed. The present paper reports the visible light mediated photocatalytic reduction of CO2 to formic acid, formaldehyde and methanol using Polyaniline-TiO2 nanocomposites (PANI-TiO2) in aqueous media under ambient conditions. The optimum TiO2 content in the nanocomposite to maximize the yield of formaldehyde and formic acid is 18.2% by weight, and it has a band gap of 2.81 eV. The yield of formaldehyde, formic acid and methanol obtained were 80.57, 32.17 and 6.3 μmole/g catalyst, respectively, in eight hours with 0.3 g/L catalyst loading. The catalyst loading of 0.7 g/L is the optimum loading to maximize the yield of formaldehyde and formic acid. Maximum yield of methanol was obtained with PANI-TiO2 containing 35% TiO2. This approach can lead the energy sector toward a non-fossil fuel-based economy. © 2022, King Fahd University of Petroleum & Minerals.