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  • 1.
    Bhatti, Muhammad Ali
    et al.
    Department of Environmental Sciences University of Sindh Jamshoro, Sindh, Pakistan.
    Shah, Aqeel Ahmed
    NED University of Engineering and Technology Karachi, Pakistan.
    Almani, Khalida Faryal
    Department of Environmental Sciences University of Sindh Jamshoro, Sindh, Pakistan.
    Tahira, Aneela
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Chalangar, Ebrahim
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Chandio, Ali dad
    NED University of Engineering and Technology Karachi, Pakistan.
    Nur, Omer
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Willander, Magnus
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Ibupoto, Zafar Hussain
    Institute of Chemistry University of Sindh Jamshoro, Sindh, Pakistan.
    Efficient photo catalysts based on silver doped ZnO nanorods for the photo degradation of methyl orange2019Ingår i: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 45, nr 17, Part B, s. 23289-23297Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, the doped ZnO nanorods with silver (Ag) as photosensitive material are prepared by the solvothermal method. The structural and optical characterization is carried out by the scanning electron microscopy, X-ray diffraction, energy dispersive spectroscopy and UV–visible spectroscopy. The use of Ag as dopant did not alter the morphology of ZnO except sample 4 which has flower like morphology. The Ag, Zn and O are the main constituent of doped materials. The XRD revealed a hexagonal phase for ZnO and cubic phase for silver and confirmed the successful doping of Ag. The photocatalytic activity of Ag doped ZnO nanorods was investigated for the photo degradation of methyl orange. The photocatalytic measurements show that 88% degradation of methyl orange by the sample 4 within the 2 h of UV light treatment (365 nm) is significant advancement in the photocatalyst and provide the inexpensive and promising materials for the photochemical applications. © 2019 Elsevier Ltd and Techna Group S.r.l.

  • 2.
    Shah, Aqeel Ahmed
    et al.
    NED University of Engineering and Technology, Karachi, Pakistan.
    Bhatti, Muhammad Ali
    Department of Environmental Sciences, University of Sindh, Jamshoro, Pakistan.
    Tahira, Aneela
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Chandio, Ali Dad
    NED University of Engineering and Technology, Karachi, Pakistan.
    Channa, Iftikhar A.
    NED University of Engineering and Technology, Karachi, Pakistan.
    Sahito, Ali Ghulam
    Centre for Pure and Applied Geology, University of Sindh, Jamshoro, Pakistan.
    Chalangar, Ebrahim
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Willander, Magnus
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Nur, Omer
    Department of Science and Technology, Campus Norrköping, Linköping University, Norrköping, Sweden.
    Ibupoto, Zafar Hussain
    Centre for Pure and Applied Geology, University of Sindh, Jamshoro, Pakistan.
    Facile synthesis of copper doped ZnO nanorods for the efficient photo degradation of methylene blue and methyl orange2020Ingår i: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 46, nr 8, part A, s. 9997-10005Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, zinc oxide (ZnO) nanorods are doped with copper by low temperature aqueous chemical growth method using different concentrations of copper 5 mg, 10 mg, 15 mg and 20 mg and labeled as sample 1, 2, 3 and 4 respectively. The morphology and phase purity of nanostructures was investigated by scanning electron microscopy, and powder X-ray diffraction techniques. The optical characterization was carried out through UV–Vis spectrophotometer. The band gap of coper doped ZnO has brought reduction at 250–600 nm and it indicates the fewer time for the recombination of electron and hole pairs, thus enhanced photo degradation efficiency is found. ZnO exhibits nanorods like shape even after the doping of copper. The photo degradation efficiency for the two chronic dyes such as methyl orange MO and methylene blue MB was found to be 57.5% and 60% respectively for a time of 180 mints. This study suggests that the copper impurity in ZnO can tailor its photocatalytic activity at considerable rate. The proposed photo catalysts are promising and can be used for the waste water treatment and other environmental applications. © 2019 Elsevier Ltd and Techna Group S.r.l.

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