1
|
Briševac D, Gabelica I, Ljubas D, Bafti A, Matijašić G, Ćurković L. Effects of TiO 2 Nanoparticles Synthesized via Microwave Assistance on Adsorption and Photocatalytic Degradation of Ciprofloxacin. Molecules 2024; 29:2935. [PMID: 38930999 PMCID: PMC11207004 DOI: 10.3390/molecules29122935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/15/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024] Open
Abstract
In this study, the optimal microwave-assisted sol-gel synthesis parameters for achieving TiO2 nanoparticles with the highest specific surface area and photocatalytic activity were determined. Titanium isopropoxide was used as a precursor to prepare the sol (colloidal solution) of TiO2. Isopropanol was used as a solvent; acetylacetone was used as a complexation moderator; and nitric acid was used as a catalyst. Four samples of titanium dioxide were synthesized from the prepared colloidal solution in a microwave reactor at a temperature of 150 °C for 30 min and at a temperature of 200 °C for 10, 20, and 30 min. The phase composition of the TiO2 samples was determined by X-ray diffraction analysis (XRD) and Fourier-transform infrared spectroscopy (FTIR). Nitrogen adsorption/desorption isotherms were used to determine the specific surface area and pore size distributions using the Brunauer-Emmett-Teller (BET) method. The band-gap energy values of the TiO2 samples were determined by diffuse reflectance spectroscopy (DRS). The distribution of Ti and O in the TiO2 samples was determined by SEM-EDS analysis. The effects of adsorption and photocatalytic activity of the prepared TiO2 samples were evaluated by the degradation of ciprofloxacin (CIP) as an emerging organic pollutant (EOP) under UV-A light (365 nm). The results of the photocatalytic activity of the synthesized TiO2 nanoparticles were compared to the benchmark Degussa P25 TiO2. Kinetic parameters of adsorption and photocatalysis were determined and analyzed. It was found that crystalline TiO2 nanoparticles with the highest specific surface area, the lowest energy band gap, and the highest photocatalytic degradation were the samples synthesized at 200 °C for 10 min. The results indicate that CIP degradation by all TiO2 samples prepared at 200 °C show a synergistic effect of adsorption and photocatalytic degradation in the removal process.
Collapse
Affiliation(s)
- Debora Briševac
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Ivana Gabelica
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Davor Ljubas
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Arijeta Bafti
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (A.B.); (G.M.)
| | - Gordana Matijašić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (A.B.); (G.M.)
| | - Lidija Ćurković
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| |
Collapse
|
2
|
Cimen A, Bilgic A, Bayrak M. Fabrication and characterization of new Fe 3O 4@SiO 2@TiO 2-CPTS-HBAP (FST-CH) nanoparticles for photocatalytic degradation and adsorption removal of rhodamine B dye in the aquatic environment. Heliyon 2024; 10:e29355. [PMID: 38623186 PMCID: PMC11016715 DOI: 10.1016/j.heliyon.2024.e29355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 02/16/2024] [Accepted: 04/05/2024] [Indexed: 04/17/2024] Open
Abstract
In this study, Fe3O4@SiO2@TiO2-CPTS-HBAP (FST-CH) nanoparticle was prepared for the simultaneous adsorption and photocatalytic degradation of aromatic chemical pollutants (Rhodamine B dye) in aqueous solution. FST-CH nanoparticle was characterized using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), Energy Dispersive X-Ray (EDX) Fluorescence Spectrometer and X-Ray Diffraction (XRD) spectroscopy. The photocatalytic activity of rhodamine B dye (RhB) was evaluated with a Kerman UV 8/18 vertical roller photoreactor. About 56% of RhB in aqueous medium was adsorbed by FST-CH nanoparticles with only 45 min of stirring in the dark, and about 77.01% was degraded or converted to other structures under the photoreactor for 120 min. The photocatalytic degradation of RhB (apparent rate constant: 0.0026 mg dm-3 min-1) occurred by a pseudo-second order reaction. In addition, the recovery of the prepared magnetic FST-CH nanoparticle by an external magnetic field, exhibiting good magnetic response and reusability, shows that the obtained magnetic FST-CH nanoparticle is stable and maintains high degradation ratio and catalyst recovery even after four cycles. Thus, the prepared FST-CH nanoparticle can be highly recommended for its use in potential applications of water decontamination.
Collapse
Affiliation(s)
- Aysel Cimen
- Department of Chemistry, Kamil Ozdag Science Faculty, Karamanoglu Mehmetbey University, 70100, Karaman, Turkey
| | - Ali Bilgic
- Vocational School of Technical Sciences, Karamanoglu Mehmetbey University, 70100, Karaman, Turkey
| | - Melike Bayrak
- Department of Chemistry, Kamil Ozdag Science Faculty, Karamanoglu Mehmetbey University, 70100, Karaman, Turkey
| |
Collapse
|
3
|
Toan TQ, Mai NT, Trang HM, Van Hao P, Van Thanh D. Ultrasonic-assisted synthesis of magnetic recyclable Fe 3O 4/rice husk biochar based photocatalysts for ciprofloxacin photodegradation in aqueous solution. RSC Adv 2023; 13:11171-11181. [PMID: 37056971 PMCID: PMC10086671 DOI: 10.1039/d3ra00178d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/30/2023] [Indexed: 04/15/2023] Open
Abstract
In this work, a new facile one-spot method has been designed to fabricate a magnetic recyclable Fe3O4/rice husk biochar photocatalyst (FBP) for the removal of Ciprofloxacin (CIP) in aqueous solution. This method combines ultrasonic-assisted impregnation and precipitation, which can overcome the difficulties of long-time reactions, complex procedures, and extreme condition requirements. The successful fabrication of the Fe3O4/biochar material has been proven by a series of material characterization techniques, including X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Raman, Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), and vibrating sample magnetometer (VSM). Moreover, the as-product FBP exhibited the excellent ability of photodegrading CIP and the possibility of magnetic recovery from the aqueous solution, suggesting a potential solution for removing antibiotic pollutants in environmental remediation.
Collapse
Affiliation(s)
- Tran Quoc Toan
- Faculty of Chemistry, Thai Nguyen University of Education 20 Luong Ngoc Quyen Thai Nguyen Vietnam
| | - Nguyen Thi Mai
- Faculty of Environmental Sciences, University of Science, Vietnam National University Hanoi 334 Nguyen Trai Road Hanoi Vietnam
- Faculty of Basic Science, Thai Nguyen University of Agriculture and Forestry Quyet Thang ward Thai Nguyen city Thai Nguyen Vietnam
| | - Hoang Minh Trang
- Faculty of Environmental Sciences, University of Science, Vietnam National University Hanoi 334 Nguyen Trai Road Hanoi Vietnam
| | - Pham Van Hao
- TNU-University of Information and Communication Technology Z115 St., Quyet Thang Ward Thai Nguyen City Thai Nguyen Vietnam
| | - Dang Van Thanh
- Faculty of Basic Science, Thai Nguyen University of Medicine and Pharmacy 284 Luong Ngoc Quyen, Thai Nguyen city Thai Nguyen Vietnam
| |
Collapse
|
4
|
Muşat V, Crintea (Căpăţână) L, Anghel EM, Stănică N, Atkinson I, Culiţă DC, Baroiu L, Țigău N, Cantaragiu Ceoromila A, Botezatu (Dediu) AV, Carp O. Ag-Decorated Iron Oxides-Silica Magnetic Nanocomposites with Antimicrobial and Photocatalytic Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4452. [PMID: 36558305 PMCID: PMC9783173 DOI: 10.3390/nano12244452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Nanotechnology offers unlimited possibilities for creating effective hybrid materials, which combine functional performance in environment depollution and antimicrobial defense with a lack of toxicity, biocompatibility, biodegradability, and natural availability. This paper presents the silver effect on photocatalytic and antibacterial activities of double-coated iron oxide nanoparticles (NPs), Fe3O4@SiO2/ZnO-Ag. The structural, morphological, and textural information of the, core-shell iron oxides-based superparamagnetic nanoparticles (IOMNPs) decorated with 5% Ag by ultrasound-assisted synthesis were evaluated by scanning electron microscopy with energy dispersive spectroscopy (SEM-EDX), X-ray diffraction, Raman spectroscopy, and Brunauer-Emmett-Teller physisorption measurements. Although two synthesis temperatures of 95 and 80 °C were used for the co-precipitated iron oxide cores, the XRD patterns revealed the formation of a single magnetite, Fe3O4, phase. The sorption-photocatalytic activities under dark and UV irradiation encountered a maximum removal efficiency of the MB (90.47%) for the Fe3O4@SiO2/ZnO-Ag sample with iron oxide core obtained at 80 °C. The rate constant for the second-order kinetics was 0.0711 min-1 for 2 h, and the correlation coefficient R2 closed to unity. Two samples with Ag-decorated hybrid SiO2/ZnO shell and hierarchically interconnected porous structure with large surface area (328.8 and 342.5 m2g-1) exhibited the best disk diffusion antimicrobial activity against four microorganisms, especially gram-positive Staphylococcus aureus.
Collapse
Affiliation(s)
- Viorica Muşat
- Laboratory of Chemical Nanotechnologies-Center of Nanostructures and Functional Materials LNC-CNMF, Dunărea de Jos” University of Galati, 47 Domnească Street, 800008 Galati, Romania
| | - Lenuța Crintea (Căpăţână)
- Laboratory of Chemical Nanotechnologies-Center of Nanostructures and Functional Materials LNC-CNMF, Dunărea de Jos” University of Galati, 47 Domnească Street, 800008 Galati, Romania
| | - Elena-Maria Anghel
- Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, Spl. Independenţei 202, 060021 Bucharest, Romania
| | - Nicolae Stănică
- Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, Spl. Independenţei 202, 060021 Bucharest, Romania
| | - Irina Atkinson
- Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, Spl. Independenţei 202, 060021 Bucharest, Romania
| | - Daniela Cristina Culiţă
- Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, Spl. Independenţei 202, 060021 Bucharest, Romania
| | - Liliana Baroiu
- Faculty of Medicine and Pharmacy, “Dunărea de Jos” University of Galati, 47 Domnească Street, 800008 Galati, Romania
| | - Nicolae Țigău
- Department of Physical-Chemistry and Environment, “Dunărea de Jos” University of Galati, 47 Domnească Street, 800008 Galati, Romania
| | - Alina Cantaragiu Ceoromila
- Department of Applied Sciences, Cross-Border Faculty, “Dunărea de Jos” University of Galati, 47 Domnească Street, 800008 Galati, Romania
| | - Andreea-Veronica Botezatu (Dediu)
- Department of Physical-Chemistry and Environment, “Dunărea de Jos” University of Galati, 47 Domnească Street, 800008 Galati, Romania
| | - Oana Carp
- Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, Spl. Independenţei 202, 060021 Bucharest, Romania
| |
Collapse
|
5
|
Javaid A, Imran M, Latif S, Hussain N, Bilal M. Functionalized magnetic nanostructured composites and hybrids for photocatalytic elimination of pharmaceuticals and personal care products. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 849:157683. [PMID: 35940270 DOI: 10.1016/j.scitotenv.2022.157683] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/19/2022] [Accepted: 07/24/2022] [Indexed: 06/15/2023]
Abstract
Due to rapid urbanization and globalization, an enormous use of pharmaceuticals and personal care products (PPCPs) has resulted their excessive release in water bodies leading to several environmental issues. This release into the environment takes place via household sewage, hospital effluents, manufacturing units and landfill sites etc. The pharmaceuticals and personal care products (PPCPs) are recently listed as emerging contaminants having many adverse effects towards aquatic life, human beings, and the whole ecosystem. The alarming threats of PPCPs demand efficient methods to cope up their hazardous impacts. The conventional wastewater remediations are not specifically designed for the removal of PPCPs and hence, they require advanced technologies and materials for their elimination to ensure water safety. Among various methods employed so far, photocatalysis is considered to be one of the most cost effective and eco-friendly method but it requires a suitable candidate as a photocatalyst. Thanks to the magnetic nanocomposites which have improved the limitations (poor stability, agglomeration, and difficult separation, etc.) of classically used nanomaterials. Magnetic nanocomposites contain at least one component having magnetic properties making their separation easy from the aqueous media after the photodegradation phenomenon. These can be further functionalized with other materials to obtain maximum advantage as photocatalyst. Few examples of such functionalized nanocomposites are inorganic material based magnetic nanocomposites, carbon based magnetic nanocomposites, biomaterial based magnetic nanocomposites, metal-organic framework based magnetic nanocomposites and polymer based magnetic nanocomposites etc. This review covers the global environmental issue of water pollution especially with respect to the PPCPs, their occurrence in aqueous environment and toxic effects on living beings. A comprehensive discussion of the recently reported functionalized magnetic nanocomposites for the photocatalytic removal of PPCPs from water is the main aim of this review. The synthetic/morphological approaches of various functionalized magnetic composites and their mechanism of action are also elaborated. The possible research challenges in the field of magnetic nanocomposites and future research directions are discussed to apply magnetic nanocomposites for wastewater treatment in near future.
Collapse
Affiliation(s)
- Ayesha Javaid
- Centre for Inorganic Chemistry, School of Chemistry, University of the Punjab, Lahore 54000, Pakistan
| | - Muhammad Imran
- Centre for Inorganic Chemistry, School of Chemistry, University of the Punjab, Lahore 54000, Pakistan.
| | - Shoomaila Latif
- School of Physical Sciences, University of the Punjab, Lahore 54000, Pakistan
| | - Nazim Hussain
- Centre for Applied Molecular Biology (CAMB), University of the Punjab, Lahore 53700, Pakistan
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China.
| |
Collapse
|
6
|
Sanchez Tobon C, Panžić I, Bafti A, Matijašić G, Ljubas D, Ćurković L. Rapid Microwave-Assisted Synthesis of N/TiO 2/rGO Nanoparticles for the Photocatalytic Degradation of Pharmaceuticals. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3975. [PMID: 36432262 PMCID: PMC9696933 DOI: 10.3390/nano12223975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/06/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
Nanocomposites comprising nitrogen-doped TiO2 and reduced graphene oxide (N/TiO2/rGO), with different rGO loading qualities, were prepared by a cost-effective microwave-assisted synthesis method. The synthesized materials were broadly characterized by Raman spectroscopy, X-ray diffraction (XRD), infrared spectroscopy (FTIR), photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), electron microscopy (SEM-EDS), and nitrogen adsorption/desorption isotherms. Anatase was the only crystalline phase observed for all synthesized materials. The rGO loading did not affect the morphological properties, but it positively influenced the photocatalytic activity of the nanocomposite materials, especially at low rGO loading. Photocatalysts were evaluated via the degradation of specific organic micropollutant (OMP) pharmaceuticals: ciprofloxacin (CIP), diclofenac (DCF), and salicylic acid (SA), under different radiation sources: ultraviolet A (UVA), solar light simulator (SLS), blue visible light (BVL) and cold visible light (CVL). CIP and SA were removed effectively via the synergy of adsorption and photocatalysis, while DCF degradation was achieved solely by photocatalysis. After implementing scavenger agents, photocatalytic degradation processes mainly depended on the specific pollutant type, while irradiation sources barely defined the photocatalytic mechanism. On the other hand, changes in irradiation intensity significantly influenced the photolysis process, while photocatalysis was slightly affected, indicating that irradiation spectra are more relevant than intensity.
Collapse
Affiliation(s)
- Camilo Sanchez Tobon
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
| | - Ivana Panžić
- Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, 10000 Zagreb, Croatia
| | - Arijeta Bafti
- Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, 10000 Zagreb, Croatia
| | - Gordana Matijašić
- Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, 10000 Zagreb, Croatia
| | - Davor Ljubas
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
| | - Lidija Ćurković
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
| |
Collapse
|
7
|
Poh Yan L, Gopinath SCB, Subramaniam S, Chen Y, Velusamy P, Chinni SV, Gobinath R, Lebaka VR. Greener synthesis of nanostructured iron oxide for medical and sustainable agro-environmental benefits. Front Chem 2022; 10:984218. [PMID: 36212054 PMCID: PMC9533193 DOI: 10.3389/fchem.2022.984218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 08/23/2022] [Indexed: 12/07/2022] Open
Abstract
Nanoscale iron oxide-based nanostructures are among the most apparent metallic nanostructures, having great potential and attracting substantial interest due to their unique superparamagnetic properties. The green production of nanostructures has received abundant attention and been actively explored recently because of their various beneficial applications and properties across different fields. The biosynthesis of the nanostructure using green technology by the manipulation of a wide variety of plant materials has been the focus because it is biocompatible, non-toxic, and does not include any harmful substances. Biological methods using agro-wastes under green synthesis have been found to be simple, environmentally friendly, and cost-effective in generating iron oxide-based nanostructures instead of physical and chemical methods. Polysaccharides and biomolecules in agro-wastes could be utilized as stabilizers and reducing agents for the green production of nanostructured iron oxide towards a wide range of benefits. This review discusses the green production of iron oxide-based nanostructures through a simple and eco-friendly method and its potential applications in medical and sustainable agro-environments. This overview provides different ways to expand the usage of iron oxide nanomaterials in different sectors. Further, provided the options to select an appropriate plant towards the specific applications in agriculture and other sectors with the recommended future directions.
Collapse
Affiliation(s)
- Leong Poh Yan
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, Arau, Perlis, Malaysia
| | - Subash C. B. Gopinath
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, Arau, Perlis, Malaysia
- Micro System Technology, Centre of Excellence (CoE), Universiti Malaysia Perlis (UniMAP), Arau, Perlis, Malaysia
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, Kangar, Perlis, Malaysia
- Centre for Chemical Biology (CCB), Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
- *Correspondence: Subash C. B. Gopinath,
| | - Sreeramanan Subramaniam
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis, Arau, Perlis, Malaysia
- Centre for Chemical Biology (CCB), Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
- School of Biological Sciences, Universiti Sains Malaysia, Georgetown, Penang, Malaysia
| | - Yeng Chen
- Department of Oral & Craniofacial Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Palaniyandi Velusamy
- Research & Development, Sree Balaji Medical College and Hospital (SBMCH)- BIHER, Chennai, Tamil Nadu, India
| | - Suresh V. Chinni
- Department of Biochemistry, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom, Selangor, Malaysia
- Department of Periodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, India
| | - Ramachawolran Gobinath
- Department of Foundation, RCSI & UCD Malaysia Campus, Georgetown, Pulau Pinang, Malaysia
| | | |
Collapse
|
8
|
Magnetic Core-Shell Iron Oxides-Based Nanophotocatalysts and Nanoadsorbents for Multifunctional Thin Films. MEMBRANES 2022; 12:membranes12050466. [PMID: 35629792 PMCID: PMC9144956 DOI: 10.3390/membranes12050466] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 02/01/2023]
Abstract
In recent years, iron oxides-based nanostructured composite materials are of particular interest for the preparation of multifunctional thin films and membranes to be used in sustainable magnetic field adsorption and photocatalysis processes, intelligent coatings, and packing or bio-medical applications. In this paper, superparamagnetic iron oxide (core)-silica (shell) nanoparticles suitable for thin films and membrane functionalization were obtained by co-precipitation and ultrasonic-assisted sol-gel methods. The comparative/combined effect of the magnetic core co-precipitation temperature (80 and 95 °C) and ZnO-doping of the silica shell on the photocatalytic and nano-sorption properties of the resulted composite nanoparticles were investigated by ultraviolet-visible (UV-VIS) spectroscopy monitoring the discoloration of methylene blue (MB) solution under ultraviolet (UV) irradiation and darkness, respectively. The morphology, structure, textural, and magnetic parameters of the investigated powders were evidenced by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, Brunauer–Emmett–Teller (BET) measurements, and saturation magnetization (vibrating sample magnetometry, VSM). The intraparticle diffusion model controlled the MB adsorption. The pseudo- and second-order kinetics described the MB photodegradation. When using SiO2-shell functionalized nanoparticles, the adsorption and photodegradation constant rates are three–four times higher than for using starting core iron oxide nanoparticles. The obtained magnetic nanoparticles (MNPs) were tested for films deposition.
Collapse
|
9
|
Sanchez Tobon C, Ljubas D, Mandić V, Panžić I, Matijašić G, Ćurković L. Microwave-Assisted Synthesis of N/TiO 2 Nanoparticles for Photocatalysis under Different Irradiation Spectra. NANOMATERIALS 2022; 12:nano12091473. [PMID: 35564182 PMCID: PMC9104789 DOI: 10.3390/nano12091473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 12/10/2022]
Abstract
Nitrogen-doped TiO2 (N/TiO2) photocatalyst nanoparticles were derived by the environmentally friendly and cost-effective microwave-assisted synthesis method. The samples were prepared at different reaction parameters (temperature and time) and precursor ratio (amount of nitrogen source; urea). The obtained materials were characterized by X-ray diffraction (XRD), photoelectron spectroscopy (XPS), Raman spectroscopy (RS), infrared spectroscopy (FTIR), diffuse reflectance spectroscopy (DRS), electron microscopy (SEM-EDS), and nitrogen adsorption/desorption isotherms. Two cycles of optimizations were conducted to determine the best reaction temperature and time, as well as N content. The phase composition for all N/TiO2 nanomaterials was identified as photoactive anatase. The reaction temperature was found to be the most relevant parameter for the course of the structural evolution of the samples. The nitrogen content was the least relevant for the development of the particle morphology, but it was important for photocatalytic performance. The photocatalytic activity of N/TiO2 nanoparticle aqueous suspensions was evaluated by the degradation of antibiotic ciprofloxacin (CIP) under different irradiation spectra: ultraviolet A light (UVA), simulated solar light, and visible light. As expected, all prepared samples demonstrated efficient CIP degradation. For all irradiation sources, increasing synthesis temperature and increasing nitrogen content further improved the degradation efficiencies.
Collapse
Affiliation(s)
- Camilo Sanchez Tobon
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (C.S.T.); (D.L.); (L.Ć.)
| | - Davor Ljubas
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (C.S.T.); (D.L.); (L.Ć.)
| | - Vilko Mandić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (V.M.); (I.P.); (G.M.)
| | - Ivana Panžić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (V.M.); (I.P.); (G.M.)
| | - Gordana Matijašić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (V.M.); (I.P.); (G.M.)
| | - Lidija Ćurković
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (C.S.T.); (D.L.); (L.Ć.)
| |
Collapse
|
10
|
Fatimah I, Fadillah G, Purwiandono G, Sahroni I, Purwaningsih D, Riantana H, Avif AN, Sagadevan S. Magnetic-silica nanocomposites and the functionalized forms for environment and medical applications: A review. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109213] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
11
|
Immobilised rGO/TiO2 Nanocomposite for Multi-Cycle Removal of Methylene Blue Dye from an Aqueous Medium. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app12010385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This work presents the immobilisation of titanium dioxide (TiO2) nanoparticles (NPs) and reduced graphene oxide (rGO)-TiO2 nanocomposite on glass sheets for photocatalytic degradation of methylene blue (MB) under different radiation sources such as ultraviolet and simulated solar radiation. The TiO2 NPs and rGO-TiO2 nanocomposite were synthesised through a simple hydrothermal method of titanium isopropoxide precursor followed by calcination treatment. Deposition of prepared photocatalysts was performed by spin-coating method. Additionally, ethylene glycol was mixed with the prepared TiO2 NPs and rGO-TiO2 nanocomposite to enhance film adhesion on the glass surface. The photocatalytic activity under ultraviolet and simulated solar irradiation was examined. Further, the influence of different water matrices (milli-Q, river, lake, and seawater) and reactive species (h+, •OH, and e−) on the photocatalytic efficiency of the immobilised rGO/TiO2 nanocomposite was careful assessed. MB dye photocatalytic degradation was found to increase with increasing irradiation time for both irradiation sources. The immobilisation of prepared photocatalysts is very convenient for environment applications, due to easy separation and reusability, and the investigated rGO/TiO2-coated glass sheets demonstrated high efficiency in removing MB dye from an aqueous medium during five consecutive cycles.
Collapse
|