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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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Liu S, Wu D, Hu J, Zhao L, Zhao L, Yang M, Feng Q. Electrospun flexible core-sheath PAN/PU/β-CD@Ag nanofiber membrane decorated with ZnO: enhance the practical ability of semiconductor photocatalyst. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:39638-39648. [PMID: 35107732 DOI: 10.1007/s11356-022-18928-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
It is necessary to effectively separate photocatalytic materials from water bodies and reuse catalysts for industrial wastewater treatment. Herein, a novel nanofiber membrane with enhanced light absorption and reusability of photocatalytic materials was prepared. The three-dimensional porous structure of the nanofibers helps the photocatalyst efficiently degrade pollutants. Specifically, a high-efficiency photocatalyst carrier with a nanofiber structure (PAN/PU/β-CD@Ag nanofiber membrane) was prepared by electrospinning and a simple silver plating process, and then ZnO NPs were synthesized in situ on the nanofiber membrane during the hydrothermal process. Under visible-light irradiation, the ZnO-loaded PAN/PU/β-CD@Ag nanofiber membranes exhibited excellent photocatalytic performance for the degradation of methylene blue (MB, 71.5%) and tetracycline hydrochloride (TCH, 70.5%). Additionally, a possible pathway of charge migration in this system was proposed. This design may provide a new idea for the preparation of visible-light photocatalytic nanofiber membranes and their treatments of wastewater containing dyes and hormones.
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Affiliation(s)
- Suo Liu
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, People's Republic of China
| | - Dingsheng Wu
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, People's Republic of China
| | - Jinyan Hu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Lingling Zhao
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, People's Republic of China
| | - Lei Zhao
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, People's Republic of China
| | - Maohuan Yang
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, People's Republic of China
| | - Quan Feng
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, People's Republic of China.
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Wu PF, Xue Q, Wang TY, Li SJ, Li GP, Xue GL. A PW 12/Ag functionalized mesoporous silica-coated magnetic Fe 3O 4 core-shell composite as an efficient and recyclable photocatalyst. Dalton Trans 2021; 50:578-586. [PMID: 33464251 DOI: 10.1039/d0dt03882b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel composite, Fe3O4@SiO2@mSiO2-PW12/Ag, was successfully prepared by in situ loading Ag nanoparticles (Ag NPs) on the surface of grafted phosphotungstate (denoted as PW12) Fe3O4@SiO2@mSiO2via a photoreduction deposition method. PW12 not only acts as a reducing agent and stabilizer for Ag NPs but also as a bridge to link Ag NPs and the SiO2 shell in the loading process. Its activity toward the photodegradation of methyl orange (MO) and photoreduction of Cr2O72- anions was evaluated. Experimental results showed that Fe3O4@SiO2@mSiO2-PW12/Ag with 5.3 wt% Ag loading and 18.65 wt% of PW12 exhibits the highest photocatalytic efficacy, and complete degradation of MO and 91.2% photoreduction of Cr(vi) were realized under simulated sunlight for 75 min, respectively. The enhanced catalytic activities of the composite are due to its high specific surface area, the synergistic effect among the components and the formation of a heterojunction of PW12/Ag. The possible enhanced photocatalytic mechanism is proposed. The catalyst is durable and can be easily recovered using a magnet for recycling without a significant loss of catalytic activity.
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Affiliation(s)
- Pan-Feng Wu
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, 18 Dianzi Road, Yanta District, Xi'an, 710065, P. R. China. and Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, P. R. China.
| | - Qi Xue
- Xi'an Modern Chemistry Research Institute, Xi'an, 710065, P. R. China
| | - Tian-Yu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, P. R. China.
| | - Shan-Jian Li
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, 18 Dianzi Road, Yanta District, Xi'an, 710065, P. R. China.
| | - Gao-Peng Li
- Key Laboratory of Magnetic Molecules & Magnetic Information Materials (Ministry of Education), School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China.
| | - Gang-Lin Xue
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, College of Chemistry & Materials Science, Northwest University, 1 Xuefu Ave., Xi'an, 710127, P. R. China.
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Wu P, Xue Q, Liu J, Wang T, Feng C, Liu B, Hu H, Xue G. In Situ Depositing Ag NPs on PDA/SiW
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Magnetic Microspheres as Highly Efficient and Durable Visible‐light‐driven Photocatalysts. ChemCatChem 2020. [DOI: 10.1002/cctc.202001539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Panfeng Wu
- College of Chemistry and Chemical Engineering Xi'an Shiyou University Yanta District Xi'an 710065 P. R. China
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
| | - Qi Xue
- Xi'an Modern Chemistry Research Institute Xi'an 710065 P. R. China
| | - Jiquan Liu
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
| | - Tianyu Wang
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
| | - Caiting Feng
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
| | - Bin Liu
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
| | - Huaiming Hu
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
| | - Ganglin Xue
- College of Chemistry & Materials Science Northwest University Guodu Chang'an District Xi'an 710127 P. R. China
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Masudi A, Harimisa GE, Ghafar NA, Jusoh NWC. Magnetite-based catalysts for wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:4664-4682. [PMID: 31873891 DOI: 10.1007/s11356-019-07415-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
The increasing number and concentration of organic pollutants in water stream could become a serious threat in the near future. Magnetite has the potential to degrade pollutants via photocatalysis with a convenient separation process. This study discusses in detail the control size and morphology of magnetite nanoparticles, and their composites with co-precipitation, hydrothermal, sol-gel, and electrochemical route. Further photocatalytic enhancement with the addition of metal and porous support was proposed. This paper also discussed the technology to extend the lifetime of recombination through an in-depth explanation of charge transfer. The possibility to use waste materials as catalyst support was also elucidated. However, magnetite-based photocatalysts still require many improvements to meet commercialization criteria.
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Affiliation(s)
- Ahmad Masudi
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Grace Erlinda Harimisa
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Nawal Abdul Ghafar
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Nurfatehah Wahyuny Che Jusoh
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
- Center of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
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García-Gómez C, García-Gutiérrez S, Obrador A, Fernández MD. Study of Zn availability, uptake, and effects on earthworms of zinc oxide nanoparticle versus bulk applied to two agricultural soils: Acidic and calcareous. CHEMOSPHERE 2020; 239:124814. [PMID: 31527003 DOI: 10.1016/j.chemosphere.2019.124814] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 09/06/2019] [Accepted: 09/07/2019] [Indexed: 06/10/2023]
Abstract
The increasing use of zinc oxide nanoparticles (ZnO NPs) in agriculture renders it necessary to evaluate their impact on soil non-target organisms. This work studies Zn availability to earthworms from the ZnO (NP and bulk) applied to two agricultural soils with a different pH at 20, 225, 500, and 1000 mg Zn kg-1. Zn uptakes and the effects on Eisenia andrei, grown under controlled conditions, were determined. Effects were assessed at three levels: organisms, mortality, growth and reproduction; biochemical, catalase and glutathione S-transferase activities, malondialdehyde (MDA), and protein content; cellular in coelomocytes, reactive oxygen species (ROS) generation, lysosomal membrane alterations (RN) and mitochondrial dysfunction (MTT). Available Zn was 100-fold higher in acidic than in calcareous soil and did not differ among ZnO (NP or bulk). Zn in worms was auto-regulated regardless of the soil Zn concentration, pH and ZnO size. Effects on mortality and weight were observed only in the acidic soil at the highest concentration, ZnO NPs reduced survival and body weight, while ZnO bulk reduced body weight. Reproduction parameters in acidic soil were: EC50 (fecundity) 277 and 256 mg Zn kg-1 and EC50 (fertility) 177 and 179 mg Zn kg-1 for ZnO NPs and bulk, respectively, with no found NP-specific effects. No responses of enzymatic activities, MDA and MTT were detected. ROS and RN were altered in the coelomocyte cells of earthworms in the two soils, but effects depended on ZnO size suggesting nanospecific effects. Soil pH governs toxicity more than ZnO size regardless of body Zn concentration.
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Affiliation(s)
- Concepción García-Gómez
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Departamento de Medio Ambiente y Agronomía.,Ctra, A Coruña, Km 7.5, 28040, Madrid, Spain.
| | - Sandra García-Gutiérrez
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Departamento de Medio Ambiente y Agronomía.,Ctra, A Coruña, Km 7.5, 28040, Madrid, Spain; Technical University of Madrid (UPM), Chemical & Food Technology Department, Avda. Complutense S/n, 28040, Madrid, Spain.
| | - Ana Obrador
- Technical University of Madrid (UPM), Chemical & Food Technology Department, Avda. Complutense S/n, 28040, Madrid, Spain.
| | - María Dolores Fernández
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Departamento de Medio Ambiente y Agronomía.,Ctra, A Coruña, Km 7.5, 28040, Madrid, Spain.
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Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye. Catalysts 2019. [DOI: 10.3390/catal9040346] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this work, the synthesis of zinc oxide (ZnO) photocatalyst from thermal decomposition of zinc acetate (ZnAc) nanoparticles obtained by supercritical antisolvent (SAS) precipitation was investigated. The optimization of calcination conditions of the SAS ZnAc was carried out, studying the effect of temperature (in the range 300–600 °C) on the production of ZnO nanoparticles. In particular, it was demonstrated that the organic residues in ZnO and its particle size, thus the specific surface area, strongly affect the photocatalytic performances. SAS micronization of ZnAc produces regular nanoparticles with a mean diameter of about 54.5 ± 11.5 nm, whereas unprocessed ZnAc is characterized by very large crystals. The experimental results evidenced that ZnAc prepared by SAS process calcined at 500 °C showed a regular nanometric structure (mean diameter: 65.0 ± 14.5 nm) and was revealed to be the best choice for the photocatalytic removal of crystal violet dye (CV). In fact, the photocatalytic activity performances of ZnO nanoparticles prepared by this route were higher with respect to that of ZnO from unprocessed ZnAc calcined at 500 °C (which is characterized by irregular tetrapods with mean size 181.1 ± 65.5 nm). The optimized photocatalyst was able to assure the complete CV decolorization in 60 min of UV irradiation time and a mineralization degree higher than 90% after 120 min of treatment time.
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