|
1
|
Abstract
With the increasing global usage of water and the continuous addition of contaminants to water sources, new challenges associated with the abatement of organic pollutants, particularly those that are refractory to conventional water and wastewater treatment technologies, have arisen [...]
Collapse
|
|
2
|
Avramescu SM, Fierascu I, Fierascu RC, Brazdis RI, Nica AV, Butean C, Olaru EA, Ulinici S, Verziu MN, Dumitru A. Removal of Paracetamol from Aqueous Solutions by Photocatalytic Ozonation over TiO 2-Me xO y Thin Films. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:613. [PMID: 35214942 PMCID: PMC8875729 DOI: 10.3390/nano12040613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/01/2022] [Accepted: 02/06/2022] [Indexed: 12/10/2022]
Abstract
Analgesics and nonsteroidal anti-inflammatory drugs (NSAIDs) such as paracetamol, diclofenac, and ibuprofen are frequently encountered in surface and ground water, thereby posing a significant risk to aquatic ecosystems. Our study reports the catalytic performances of nanosystems TiO2-MexOy (Me = Ce, Sn) prepared by the sol-gel method and deposited onto glass slides by a dip-coating approach in the removal of paracetamol from aqueous solutions by catalytic ozonation. The effect of catalyst type and operation parameters on oxidation efficiency was assessed. In addition to improving this process, the present work simplifies it by avoiding the difficult step of catalyst separation. It was found that the thin films were capable of removing all pollutants from target compounds to the oxidation products.
Collapse
Affiliation(s)
- Sorin Marius Avramescu
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 050663 Bucharest, Romania;
- PROTMED Research Centre, University of Bucharest, 050107 Bucharest, Romania; (A.V.N.); (E.A.O.)
| | - Irina Fierascu
- Emerging Nanotechnologies Group, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, 060021 Bucharest, Romania;
- Faculty of Horticulture, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 011464 Bucharest, Romania
| | - Radu Claudiu Fierascu
- Emerging Nanotechnologies Group, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, 060021 Bucharest, Romania;
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 011061 Bucharest, Romania
| | - Roxana Ioana Brazdis
- Emerging Nanotechnologies Group, National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM, 060021 Bucharest, Romania;
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 011061 Bucharest, Romania
| | - Angel Vasile Nica
- PROTMED Research Centre, University of Bucharest, 050107 Bucharest, Romania; (A.V.N.); (E.A.O.)
| | - Claudia Butean
- Department of Chemistry and Biology, North University Centre of Baia Mare, Technical University of Cluj-Napoca, 430122 Baia Mare, Romania;
| | - Elena Alina Olaru
- PROTMED Research Centre, University of Bucharest, 050107 Bucharest, Romania; (A.V.N.); (E.A.O.)
| | | | - Marian Nicolae Verziu
- Department of Bioresources and Polymer Science, Advanced Polymer Materials Group, Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gh Polizu Street, 011061 Bucharest, Romania;
| | - Anca Dumitru
- Faculty of Physics, University of Bucharest, 077125 Magurele, Romania
| |
Collapse
|
|
3
|
Catalytic ozonation of real textile wastewater by magnetic oxidized g-C3N4 modified with Al2O3 nanoparticles as a novel catalyst. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120208] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
|
4
|
Moosavi S, Li RYM, Lai CW, Yusof Y, Gan S, Akbarzadeh O, Chowhury ZZ, Yue XG, Johan MR. Methylene Blue Dye Photocatalytic Degradation over Synthesised Fe 3O 4/AC/TiO 2 Nano-Catalyst: Degradation and Reusability Studies. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2360. [PMID: 33261010 PMCID: PMC7760290 DOI: 10.3390/nano10122360] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/22/2020] [Accepted: 11/25/2020] [Indexed: 12/18/2022]
Abstract
In this study, activated carbon (AC) from coconut shell, as a widely available agricultural waste, was synthesised in a simple one-step procedure and used to produce a magnetic Fe3O4/AC/TiO2 nano-catalyst for the degradation of methylene blue (MB) dye under UV light. Scanning electron microscopy revealed that TiO2 nanoparticles, with an average particle size of 45 to 62 nm, covered the surface of the AC porous structure without a reunion of its structure, which according to the TGA results enhanced the stability of the photocatalyst at high temperatures. The photocatalytic activities of synthesised AC, commercial TiO2, Fe3O4/AC, and Fe3O4/AC/TiO2 were compared, with Fe3O4/AC/TiO2 (1:2) exhibiting the highest catalytic activity (98%). Furthermore, evaluation of the recovery and reusability of the photocatalysts after treatment revealed that seven treatment cycles were possible without a significant reduction in the removal efficiency.
Collapse
Affiliation(s)
- Seyedehmaryam Moosavi
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, Kuala Lumpur 50603, Malaysia; (C.W.L.); (Y.Y.); (O.A.); (Z.Z.C.); (M.R.J.)
| | - Rita Yi Man Li
- Sustainable Real Estate Research Center, Hong Kong Shue Yan University, North Point, Hong Kong 999077;
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, Kuala Lumpur 50603, Malaysia; (C.W.L.); (Y.Y.); (O.A.); (Z.Z.C.); (M.R.J.)
| | - Yusliza Yusof
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, Kuala Lumpur 50603, Malaysia; (C.W.L.); (Y.Y.); (O.A.); (Z.Z.C.); (M.R.J.)
| | - Sinyee Gan
- Publication Unit, Information Technology and Corporate Services Division, Malaysian Palm Oil Board (MPOB), Kajang 43000, Selangor, Malaysia;
| | - Omid Akbarzadeh
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, Kuala Lumpur 50603, Malaysia; (C.W.L.); (Y.Y.); (O.A.); (Z.Z.C.); (M.R.J.)
| | - Zaira Zaman Chowhury
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, Kuala Lumpur 50603, Malaysia; (C.W.L.); (Y.Y.); (O.A.); (Z.Z.C.); (M.R.J.)
| | - Xiao-Guang Yue
- School of Sciences, European University Cyprus, 1516 Nicosia, Cyprus;
- Faculty of Engineering and Technology, Siksha ‘O’ Anusandhan University, Bhubaneswar 751030, India
| | - Mohd RafieBin Johan
- Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University for Malaya (UM), Level 3, Block A, Kuala Lumpur 50603, Malaysia; (C.W.L.); (Y.Y.); (O.A.); (Z.Z.C.); (M.R.J.)
| |
Collapse
|
|
5
|
Abstract
Ag/ZnO nanocomposites were synthesized and applied in the photocatalytic ozonation of phenol. Their crystal, textural, morphological, optical, and electrochemical properties were investigated by XRD, Raman, SEM, TEM, UV–Vis diffuse reflectance spectroscopy (DRS), X-ray photoemission spectroscopy (XPS), and photoluminescence (PL) techniques in detail. The results indicated that silver nanoparticles were well dispersed on the surface of porous ZnO and the intimate contacts were formed at the Ag/ZnO interfaces. This prominently favored the separation and transfer of photoinduced electrons from ZnO to Ag nanoparticles for the activation of ozone to produce •OH and •O2−. As a result, a significant enhancement in photocatalytic ozonation of phenol was achieved over Ag/ZnO catalysts. It also showed a synergistic effect between photocatalysis and ozonation.
Collapse
|