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Gil MA, Murcia JJ, Hernández-Laverde M, Morante N, Sannino D, Vaiano V. Ag/Cr-TiO 2 and Pd/Cr-TiO 2 for Organic Dyes Elimination and Treatment of Polluted River Water in Presence of Visible Light. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2341. [PMID: 37630926 PMCID: PMC10459751 DOI: 10.3390/nano13162341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023]
Abstract
In this work, photocatalytic materials constituted by Cr-doped TiO2 (Cr-TiO2) decorated with noble metals show high effectiveness in the mineralization of Acid Orange 7 (AO7) and in the disinfection of real river water. The materials were firstly obtained by sol-gel method to get Cr-TiO2 that was subsequently modified by photochemical deposition of Ag or Pd nanoparticles (Ag/Cr-TiO2, Pd/Cr-TiO2). Chemical-physical characterization results evidenced that the noble metals were homogeneously distributed on the Cr-TiO2 surface. By using Pd(0.25%)/Cr-TiO2, the AO7 discoloration efficiency was about 91.4% after only 60 min of visible irradiation, which can be due to the lowest band gap of this material. Moreover, nitrates, chlorides, total hardness, and coliform bacteria content significantly decreased after the treatment of real river water samples (that is contaminated by industrial and domestic effluents) under UV and visible light irradiation in the presence of TiCrOx decorated with noble metals. One hundred percent of elimination rate for E. coli, total coliforms, and other enterobacteriaceae (without regrowth) was achieved by using Ag/Cr-TiO2 as photocatalyst.
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Affiliation(s)
- Mariana Alejandra Gil
- Grupo de Catálisis, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja 150002, Boyacá, Colombia; (M.A.G.); (J.J.M.); (M.H.-L.)
| | - Julie J. Murcia
- Grupo de Catálisis, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja 150002, Boyacá, Colombia; (M.A.G.); (J.J.M.); (M.H.-L.)
| | - Mónica Hernández-Laverde
- Grupo de Catálisis, Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Tunja 150002, Boyacá, Colombia; (M.A.G.); (J.J.M.); (M.H.-L.)
- Grupo GIA UNAD, Escuela de Ciencias Básicas Tecnología e Ingeniería, Universidad Nacional Abierta y a Distancia UNAD, Sogamoso 152217, Boyacá, Colombia
| | - Nicola Morante
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (N.M.); (V.V.)
| | - Diana Sannino
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (N.M.); (V.V.)
| | - Vincenzo Vaiano
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (N.M.); (V.V.)
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Wei S, Zheng H, Zhao JJ, Yu S, Wu B, Zhang G, Zhang S. Substituent effect in self-sensitized degradation of Acid Orange 7 in solar/diketone processes. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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The Emerging Career of Strontium Titanates in Photocatalytic Applications: A Review. Catalysts 2022. [DOI: 10.3390/catal12121619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The growing energy demands and rapid industrialization drove the attention towards a sustainable living. The methods to a adopt renewable source of energy has made the field of heterogeneous photocatalysis so famous. The photocatalytic hydrogen production seems to be an answer for our future energy crisis. In this regard, alkaline earth metal titanates with a perovskite structure are one of the in demand materials these days. Among these, strontium titanates (SrTiO3) play an important role and have shown a potential, especially in the field of hydrogen production. This review summarizes the significance of (SrTiO3) in photocatalytic water splitting, to produce hydrogen and the photocatalytic degradation of the pollutants from the waste water. Different synthesis methods used for preparing SrTiO3 are also discussed.
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Isac L. Special Issue: Photocatalytic Materials for Environment Treatment and Energy Production. MATERIALS 2022; 15:ma15103631. [PMID: 35629657 PMCID: PMC9145988 DOI: 10.3390/ma15103631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 01/27/2023]
Affiliation(s)
- Luminita Isac
- Renewable Energy Systems and Recycling Research Center, Transilvania University of Brasov, Eroilor 29 Street, 35000 Brasov, Romania
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