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Enhanced photocatalytic performance of CeO2–TiO2 nanocomposite for degradation of crystal violet dye and industrial waste effluent

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Abstract

This study presents the synthesis of CeO2–TiO2 nanocomposite and its potential application for the visible light-driven photocatalytic degradation of model crystal violet dye as well as real industrial waste water. The ceria–titania (CeO2–TiO2) nanocomposite material was synthesised using facile hydrothermal route without the assistance of any template molecule. As-prepared composite was characterised by SEM, TEM, HRTEM, XRD, XPS for surface features, morphological and crystalline characters. The formed nanostructures were determined to possess crystal-like geometrical shape and average size less than 100 nm. The as-synthesised nanocomposite was further investigated for their heterogeneous photocatalytic potential against the oxidative degradation of CV dye taken as model pollutant. The photo-catalytic performance of the as-synthesised material was evaluated both under ultra-violet as well as visible light. Best photocatalytic performance was achieved under visible light with complete degradation (100%) exhibited within 60 min of irradiation time. The kinetics of the photocatalytic process were also considered and the reaction rate constant for CeO2–TiO2 nanocomposite was determined to be 0.0125 and 0.0662 min−1 for ultra-violet and visible region, respectively. In addition, the as-synthesised nanocomposite demonstrated promising results when considered for the photo-catalytic degradation of coloured industrial waste water collected from local textile industry situated in Faisalabad region of Pakistan. Enhanced photo-catalytic performance of CeO2–TiO2 nanocomposite was proposed owing to heterostructure formation leading to reduced electron–hole recombination.

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Acknowledgements

This research is funded by Higher Education Commission (HEC) of Pakistan by research Grant no. NRPU6115. Dr. Waheed S. Khan also acknowledges the support of Chinese Academy of Sciences under CAS-PIFI Fellowship at Ningbo Institute of Materials Technology and Engineering (NIMTE), Ningbo City, Zhejiang, P. R. China.

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Authors and Affiliations

  1. National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad, 38000, Pakistan

    Mehvish Zahoor, Amara Arshad, Mazhar Iqbal, Sadia Zafar Bajwa, Razium Ali Soomro & Waheed S. Khan

  2. National Centre for Physics, QAU Campus, Shahdra Valley Road, Islamabad, 44000, Pakistan

    Yaqoob Khan & Ishaq Ahmad

  3. Division of Science and Technology, University of Education, College Road Township, Lahore, Pakistan

    Faheem K. Butt

  4. Nanobiomaterials Group, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo, Zhejiang, People’s Republic of China

    M. Zubair Iqbal, Aiguo Wu & Waheed S. Khan

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  1. Mehvish Zahoor
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  2. Amara Arshad
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  11. Waheed S. Khan
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Correspondence to Waheed S. Khan.

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Zahoor, M., Arshad, A., Khan, Y. et al. Enhanced photocatalytic performance of CeO2–TiO2 nanocomposite for degradation of crystal violet dye and industrial waste effluent. Appl Nanosci 8, 1091–1099 (2018). https://doi.org/10.1007/s13204-018-0730-z

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