tailieunhanh - ZnCr-LDHs with dual adsorption and photocatalysis capability for the removal of acid orange 7 dye in aqueous solution

This study aims to explore the potential of layered double hydroxides (LDHs) materials for the treatment of contaminated waters by organic pollutants, using a combined dual process, namely adsorptionphotocatalysis. A series of LDHs of ZnCr-X where (X ¼ Cl, SO4 and CO3) were synthesized and characterized by several techniques such as DRX, FTIR, BET, TEM, and UV-Visible spectrophotometry. | Journal of Science Advanced Materials and Devices 6 2021 118e126 Contents lists available at ScienceDirect Journal of Science Advanced Materials and Devices journal homepage locate jsamd Original Article ZnCr-LDHs with dual adsorption and photocatalysis capability for the removal of acid orange 7 dye in aqueous solution Lekbira EL Mersly a El Mountassir El Mouchtari a El Mostafa Moujahid b Claude Forano c Mohammadine El Haddad a Samir Briche d Abdelaaziz Alaoui Tahiri a Salah Rafqah a a Laboratoire de Chimie Analytique et Mol eculaire Facult e Polydisciplinaire de Safi Universit e Cadi Ayyad Morocco b Laboratoire Physico-Chimie des Mat eriaux Facult e des Sciences Universit e Chouaib Doukkali EL Jadida Morocco c Universit e Clermont Auvergne CNRS SIGMA Clermont ICCF F-63000 Clermont-Ferrand France d Departement Stockage de l Energie et Rev etements Multifonctionnels SERM MAScIR Foundation Rabat Morocco a r t i c l e i n f o a b s t r a c t Article history This study aims to explore the potential of layered double hydroxides LDHs materials for the treatment Received 27 April 2020 of contaminated waters by organic pollutants using a combined dual process namely adsorption- Received in revised form photocatalysis. A series of LDHs of ZnCr-X where X Cl SO4 and CO3 were synthesized and charac- 4 August 2020 terized by several techniques such as DRX FTIR BET TEM and UV-Visible spectrophotometry. The Accepted 10 August 2020 Available online 25 August 2020 pollutant acid orange 7 AO7 is efficiently adsorbed on the surface of the three LDHs. The adsorption depends on the nature of the intercalated anion. The adsorption percentage of AO7 achieved for the intercalated anions SO4 2 CO3 2 and Cl was 25 32 and respectively. We find that ZnCreSO4 LHD Keywords Layered double hydroxides is the most effective photocatalyst for AO7 dye decomposition in the UV and visible range and its Anions exchange photocatalytic activity is preserved during three cycles of .