Micelle directed synthesis of (C19H42N)4H3(PW11O39) nanoparticles and their catalytic efficiency for oxidative degradation of azo dye |
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Authors: | Asma Tufail Shah Adnan Mujahid Muhammad Umar Farooq Waqar Ahmad Baoshan Li Muhammad Irfan Muhammad Abdul Qadir |
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Institution: | 1. Institute of Chemistry, University of the Punjab, Lahore, 54590, Pakistan 2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China 3. PCSIR Labs, Pakistan Institute of Technology For Minerals and Advanced Engineering Materials, Lahore, Pakistan
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Abstract: | The nanoparticles of monovacant lacunary keggin-type polyoxometalate (C19H42N)4H3(PW11O39) has been successfully synthesized by Micelle Directed Method using hexadecyltrimthyl ammonium bromide (CTAB) as a template. Non-ionic copolymer Pluronic F127 was used as a capping agent that helps in formation of nanoparticles by preventing the aggregation during the coating of H3(PW11O39)4- onto the counter ion (C19H42N)+. The synthesized material was characterized by Scanning electron microscope (SEM), TGA, DSC and FT-IR techniques. SEM images indicated that (C19H42N)4H3(PW11O39) nanoparticles possess spherical structure. FTIR results revealed that the structural integrity of monovacant lacunary keggin-type polyoxometalates (POM) was not affected when reducing the size. TGA–DSC results showed that the material was thermally stable (with 37 % weight loss) and POM encapsulates CTAB. The efficiency of synthesized material was checked by applying it as a catalyst for the oxidation of toxic mordant yellow dye i.e., potentially hazardous and non-biodegradable azo dye. The (C19H42N)4H3(PW11O39) nanoparticles gave 96 % dye degradation in 60 min at 60 °C temperature. Moreover, on recycling POM nanoparticles demonstrate 92 % oxidative degradation of mordant yellow dye. |
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