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Bibi M, Rashid J, Siddiqa A, Xu M. The mechanism and reaction kinetics of visible light active bismuth oxide deposited on titanium vanadium oxide for aqueous diclofenac photocatalysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:23228-23246. [PMID: 38413524 DOI: 10.1007/s11356-024-32477-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 02/10/2024] [Indexed: 02/29/2024]
Abstract
Non-uniform, non-spherical bismuth oxide deposited on titanium vanadium oxide (3%-BVT1) was successfully synthesized via co-precipitation method and assessed for visible light degradation of aqueous diclofenac. The synthesized photocatalysts were characterized using X-ray diffraction, diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy. Up to 80.7% diclofenac degradation was observed with a significant increment in reaction rate compared to commercially available Degussa P25 (kapp = 0.0013 → 0.0083 min-1) achieved within 3 h treatment time under optimized parameters of diclofenac concentration (10 mg L-1), catalyst loading (0.1 g L-1), and pH (5). The enhanced photocatalysis could be due to electron-hole separation and contribution of powerful oxidative species •OH > O2•- > h+ > > e-. The recyclability experiments indicate that 3%-BVT1 retained its efficiency up to 74.1% over five reaction cycles. Gas chromatography-mass spectrometry analysis indicated the formation of several transformation products during the degradation pathway. The studies of interfering ions depicted mild interference by sulfates, while interference by phosphates and nitrates was negligible during photocatalytic process, i.e., 70, 78.01, and 78.43% for the selected concentrations of 50, 25, and 40 mg L-1 as per their maximum concentrations detected in the natural wastewaters. Thus, 3%-BVT1 is a potential versatile candidate to treat various organic pollutants including pharmaceuticals.
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Affiliation(s)
- Mehmooda Bibi
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Jamshaid Rashid
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan.
- BNU-HKUST Laboratory for Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, 519087, China.
| | - Asima Siddiqa
- National Centre for Physics, Quaid-I-Azam University Complex, Islamabad, 45320, Pakistan
| | - Ming Xu
- BNU-HKUST Laboratory for Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, 519087, China
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2
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Rani M, Yadav J, Shanker U, Wang C. Recent updates on remediation approaches of environmentally occurring pollutants using visible light-active nano-photocatalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:22258-22283. [PMID: 38418782 DOI: 10.1007/s11356-024-32455-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 02/08/2024] [Indexed: 03/02/2024]
Abstract
Photocatalysis emerges as a potential remedy for the issue of an unreliable light source. Recognized as the most dependable and potent energy source sustaining life on Earth, sunlight offers a promising solution. Sunlight is abundant and free, operational costs associated with running photocatalytic system using nanoparticles are often lower compared to system relying on artificial light source. The escalating problem of water pollution, particularly in highly industrialized nations, necessitates effective wastewater treatment methods. These methods aim to combat elevated pollution levels, encompassing pharmaceuticals, dyes, flame retardants, and pesticide components. Advanced oxidation processes within photocatalytic wastewater treatment exhibit substantial promise for removing complex organic pollutants. Doped nanomaterials, with their enhanced properties, enable efficient utilization of light. Coupled nanomaterials present significant potential in addressing both water and energy challenges by proficiently eliminating persistent pollutants from environment. Photocatalysis when exposed to sunlight can absorb photons and generate e- h + pairs. This discussion briefly outlines the wastewater treatment facilitated by interconnected nanomaterials, emphasizing their role in water-energy nexus. In exploring the capabilities of components within a functional photocatalyst, a comprehensive analysis of both simple photocatalysts and integrated photocatalytic systems is undertaken. Review aims to provide detailed explanation of the impact of light source on photon generation and significance of solar light on reaction kinetics, considering various parameters such as catalyst dosage, pH, temperature, and types of oxidants. By shedding light on these aspects, this review seeks to enhance our understanding of intricate processes involved in photocatalysis and its potential applications in addressing contemporary environmental challenges.
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Affiliation(s)
- Manviri Rani
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India
| | - Jyoti Yadav
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan, 302017, India
| | - Uma Shanker
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India, 144027.
| | - Chongqing Wang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China
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3
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Lin JY, Zhang Y, Bian Y, Zhang YX, Du RZ, Li M, Tan Y, Feng XS. Non-steroidal anti-inflammatory drugs (NSAIDs) in the environment: Recent updates on the occurrence, fate, hazards and removal technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166897. [PMID: 37683862 DOI: 10.1016/j.scitotenv.2023.166897] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023]
Abstract
Non-steroidal Anti-inflammatory Drugs (NSAIDs) are extensively utilized pharmaceuticals worldwide. However, owing to the improper discharge and disposal practices, they have emerged as significant contaminants that are widely distributed in water, soils, and sewage sediments. This ubiquity poses a substantial threat to the ecosystem and human health. Consequently, it is imperative to develop rapid, cost-effective, efficient and reliable approaches for containing these substance in order to mitigate the deleterious impact of NSAIDs. This research provides a comprehensive review of the occurrence, fate, and hazards associated with NSAIDs in the general environment. Additionally, various removal technologies, including advanced oxidation processes, biodegradation, and adsorption, were systematically summarized. The study also presents a comparative analysis of the benefits and drawbacks of different removal technologies while interpreting challenges related to NSAIDs' removal and proposing strategies for future development.
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Affiliation(s)
- Jia-Yuan Lin
- School of Pharmacy, China Medical University, Shenyang 110122, China; Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Yu Bian
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Yi-Xin Zhang
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Rong-Zhu Du
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Ming Li
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China
| | - Yue Tan
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang 110022, China
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang 110122, China.
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4
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García-Ramírez P, Diaz-Torres LA. Self-cleaning cellulose acetate/crystalline nanocellulose/polyvinylidene fluoride/Mg 0.975Ni 0.025SiO 3membrane for removal of diclofenac sodium and methylene blue dye in water. NANOTECHNOLOGY 2023; 35:015703. [PMID: 37751721 DOI: 10.1088/1361-6528/acfd32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 09/25/2023] [Indexed: 09/28/2023]
Abstract
Recalcitrant pollutants present in wastewater, without an effective treatment, have several effects on aquatic ecosystems and human health due to their chemical structure and persistence. Therefore, it is crucial the development of efficient technologies to eliminate such pollutants in water. Nano-photocatalysts are considered a promising technology for water remediation; however, one common drawback is the difficulty of recovering it after water processing. One effective strategy to overcome such problem is its immobilization into substrates such as polymeric membranes. In this study, a polymeric membrane with embedded Mg0.975Ni0.025SiO3is proposed to remove model pollutants diclofenac sodium and methylene blue dye by synergetic adsorption and photocatalytic processes. Mg0.975Ni0.025SiO3was synthesized by the combustion method. The matrix polymeric blend consisting of a blend of cellulose acetate, crystalline nanocellulose and polyvinylidene fluoride was obtained by the phase inversion method. The composite membranes were characterized by FTIR, x-ray diffraction, and scanning electron microscopy. With pollutant solutions at pH 7, the pollutant adsorption capacity of the membranes reached up to 30% and 45% removal efficiencies for diclofenac sodium and methylene blue, respectively. Under simulated solar irradiation photocatalytic removal performances of 70% for diclofenac sodium pH 7, and of 97% for methylene blue dye at pH 13, were reached. The membrane photocatalytic activity allows the membrane to avoid pollutant accumulation on its surface, given a self-cleaning property that allows the reuse of at least three cycles under sunlight simulator irradiation. These results suggest the high potential of photocatalytic membranes using suitable and economical materials such as cellulosic compounds and magnesium silicates for water remediation.
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Affiliation(s)
- P García-Ramírez
- Laboratorio de Fotocatálisis y Fotosíntesis Artificial (F&FA), Grupo de Espectroscopía de Materiales Avanzados y Nanoestructurados (GEMANA), Centro de Investigaciones en Óptica, A.C., Lomas del Bosque 115, Lomas del Campestre, León, 37150, Guanajuato, Mexico
| | - L A Diaz-Torres
- Laboratorio de Fotocatálisis y Fotosíntesis Artificial (F&FA), Grupo de Espectroscopía de Materiales Avanzados y Nanoestructurados (GEMANA), Centro de Investigaciones en Óptica, A.C., Lomas del Bosque 115, Lomas del Campestre, León, 37150, Guanajuato, Mexico
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5
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Valadez-Renteria E, Perez-Gonzalez R, Gomez-Solis C, Diaz-Torres LA, Encinas A, Oliva J, Rodriguez-Gonzalez V. A novel and stretchable carbon-nanotube/Ni@TiO 2:W photocatalytic composite for the complete removal of diclofenac drug from the drinking water. J Environ Sci (China) 2023; 126:575-589. [PMID: 36503783 DOI: 10.1016/j.jes.2022.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 06/17/2023]
Abstract
We present the structural, morphological and photocatalytic properties of stretchable composites made with carbon nanotubes (CNTs), silicon rubber and Ni@TiO2:W nanoparticles (TiWNi NPs) with average size of 37 ± 2 nm. Microscopy images showed that the TiWNi NPs decorated the surface of the CNT fibers, which are oriented in a preferential direction. TiWNi NPs presented a mixture of anatase/rutile phases with cubic structure. The performance of the TiWNi powders and stretchable composites was evaluated for the photocatalytic degradation of diclofenac (DCF) anti-inflammatory drug under ultraviolet-visible light. The results revealed that the maximum DCF degradation percentages were 34.6%, 91.9%, 97.1%, 98.5% and 100% for the CNT composite (stretched at 0%), TiWNi powders, CNT + TiWNi (stretched at 0%), CNT + TiWNi (stretched at 50%) and CNT + TiWNi (stretched at 100%), respectively. Thus, stretching the CNT + TiWNi composites was a good strategy to enhance the DCF degradation percentage from 97.1% to 100%, since stretching created additional defects (oxygen vacancies) that acted as electron sink, delaying the electron-hole recombination, and favors the DCF degradation. Raman/absorbance measurements confirmed the presence of such defects. Moreover, the reactive oxygen species (ROS) were determined by the scavenger's experiments and found that the main ROS were the ·OH and O2- radicals, which attacked the DCF molecules, causing their degradation. The results of this investigation confirmed that the stretchable CNT/TiWNi-based composites are a viable alternative to remove pharmaceutical contaminants from water and can be manually separated from the decontaminated water, which is unviable using photocatalytic powders.
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Affiliation(s)
- Ernesto Valadez-Renteria
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México
| | - Rafael Perez-Gonzalez
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México
| | | | - Luis Armando Diaz-Torres
- Grupo de Espectroscopia de Materiales Avanzados y Nanoestructurados (GEMANA), Centro de Investigaciones en Óptica, A.C., Lomas Del Campestre, León 37150, México
| | - Armando Encinas
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México
| | - Jorge Oliva
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México.
| | - Vicente Rodriguez-Gonzalez
- Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, México.
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6
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Nazim VS, El-Sayed GM, Amer SM, Nadim AH. Functionalized SnO 2 nanoparticles with gallic acid via green chemical approach for enhanced photocatalytic degradation of citalopram: synthesis, characterization and application to pharmaceutical wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:4346-4358. [PMID: 35965298 PMCID: PMC9376129 DOI: 10.1007/s11356-022-22447-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Eco-friendly stannic oxide nanoparticles functionalized with gallic acid (SnO2/GA NP) were synthesized and employed as a novel photocatalyst for the degradation of citalopram, a commonly prescribed antidepressant drug. SnO2/GA NP were characterized using high-resolution transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller measurements and X-ray diffraction. A validated RP-HPLC assay was developed to monitor citalopram concentration in the presence of its degradation products. Full factorial design (24) was conducted to investigate the effect of irradiation time, pH, SnO2/GA NP loading and initial citalopram concentration on the efficiency of the photodegradation process. Citalopram initial concentration was found to be the most significant parameter followed by irradiation time and pH, respectively. At optimum conditions, 88.43 ± 0.7% degradation of citalopram (25.00 µg/mL) was obtained in 1 h using UV light (1.01 mW/cm2). Citalopram kinetics of degradation followed pseudo-first order rate with Kobs and t0.5 of - 0.037 min-1 and 18.73 min, respectively. The optimized protocol was successfully applied for treatment of water samples collected during different cleaning validation cycles of citalopram production lines. The reusability of SnO2/GA NP was studied for 3 cycles without significant loss in activity. This approach would provide a green and economic alternative for pharmaceutical wastewater treatment of organic pollutants.
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Affiliation(s)
- Veronia S Nazim
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini st, Cairo, Egypt
| | - Ghada M El-Sayed
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini st, Cairo, Egypt
| | - Sawsan M Amer
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini st, Cairo, Egypt
| | - Ahmed H Nadim
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini st, Cairo, Egypt.
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7
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Zhao J, Chen Y, Guan R, Cheng X, Wu Z, Zhao N, Shang Q, Sun Y. Enhancement of water soluble PDI-NapSO3H on the photocatalytic performance of Fe-TiO2 under visible light. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Kulhary D, Singh S. Design of g‐C
3
N
4
/BaBiO
3
Heterojunction Nanocomposites for Photodegradation of an Organic Dye and Diclofenac Sodium under Visible Light via Interfacial Charge Transfer. ChemistrySelect 2022. [DOI: 10.1002/slct.202201964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dinesh Kulhary
- Special Center for Nanoscience Jawaharlal Nehru University New Delhi 110067 India
| | - Satyendra Singh
- Special Center for Nanoscience Jawaharlal Nehru University New Delhi 110067 India
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9
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Grosu EF, Seftel E, Cuykx M, Mertens M, Covaci A, Cool P, Carja G. Efficient degradation and mineralization of diclofenac in water on ZnMe (Me: Al; Co; Ga) layered double hydroxides and derived mixed oxides as novel photocatalysts. CR CHIM 2022. [DOI: 10.5802/crchim.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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SnO2 nanoparticles embedded onto MoS2 nanoflakes - An efficient catalyst for photodegradation of methylene blue and photoreduction of hexavalent chromium. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140173] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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11
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Rajput RB, Jamble SN, Kale RB. A review on TiO 2/SnO 2 heterostructures as a photocatalyst for the degradation of dyes and organic pollutants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 307:114533. [PMID: 35121365 DOI: 10.1016/j.jenvman.2022.114533] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 01/10/2022] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
Industrialization, civilization and human activities have all grown steadily in recent years. As a result, small and large industries discharge many organic pollutants into the environment and contribute to environmental pollution. These compounds are quite stable and challenging to break down over time, posing a long-term risk. The heterogeneous advanced oxidation processes technology has gained tremendous attention. It depends on the light-induced formation of e-/h+ pairs, which combine with water and aqueous oxygen to generate highly reactive hydroxyl radicals that degrade the organic pollutants in a solution and convert them ultimately into non-toxic products. In this paper, the synergetic impact of TiO2-SnO2 coupling with other semiconductor materials and their photodegradation performance on toxic contaminants in an aqueous medium has been reviewed. In addition, multiple approaches for the synthesis of TiO2-SnO2 photocatalysts have been discussed. Among them, hydrothermal, sol-gel, electrospinning, precipitation and even their combination are extensively used to synthesize various forms of nanostructures. These techniques demonstrate better tunability for visible absorption, suppression of e-/h+ pair recombination and enhanced e-/h+ separation to improve photocatalytic performance. This paper also summarises the role of different operating factors such as catalyst loading, pH, pollutants variation concentration, various light sources and oxidizing agents on the photodegradation of organic pollutants.
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Affiliation(s)
- Rekha B Rajput
- Department of Physics, The Institute of Science, Madam Cama Road, Mumbai, India.
| | - Shweta N Jamble
- Department of Physics, The Institute of Science, Madam Cama Road, Mumbai, India
| | - Rohidas B Kale
- Department of Physics, The Institute of Science, Madam Cama Road, Mumbai, India.
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12
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Javaid A, Latif S, Imran M, Hussain N, Rajoka MSR, Iqbal HMN, Bilal M. Nanohybrids-assisted photocatalytic removal of pharmaceutical pollutants to abate their toxicological effects - A review. CHEMOSPHERE 2022; 291:133056. [PMID: 34838839 DOI: 10.1016/j.chemosphere.2021.133056] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/03/2021] [Accepted: 11/22/2021] [Indexed: 02/08/2023]
Abstract
Advancement in medication by health care sector has undoubtedly improved our life but at the same time increased the chemical burden on our natural ecosystem. The residuals of pharmaceutical products become part of wastewater streams by different sources such as excretion after their usage, inappropriate way of their disposal during production etc. Hence, they are serious health hazards for human, animal, and aquatic lives. Due to rapid urbanization, the increased demand for clean drinking water is a burning global issue. In this regard it is need of the present era to explore efficient materials which could act as photocatalyst for mitigation of pharmaceuticals in wastewater. Nanohybrid as photocatalyst is one of the widely explored class of materials in photocatalytic degradation of such harmful pollutants. Among these nanohybrids; metal based nanohybrids (metals/metal oxides) and carbon based nanohybrids (carbon nanotubes, graphene, fullerenes etc.) have been explored to remove pharmaceutical drugs. Keeping in view the increasing harmful impacts of pharmaceuticals; the sources of pharmaceuticals in wastewater, their health risk factors and their mitigation using efficient nanohybrids as photocatalysts have been discussed in this review.
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Affiliation(s)
- Ayesha Javaid
- 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, Pakistan
| | - Muhammad Imran
- Centre for Inorganic Chemistry, School of Chemistry, University of the Punjab, Lahore, 54000, Pakistan
| | - Nazim Hussain
- Centre for Applied Molecular Biology (CAMB), University of the Punjab, Lahore, 53700, Pakistan
| | - Muhammad Shahid Riaz Rajoka
- Department of Food Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen, Guangdong, People's Republic of China
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
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13
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Mishra SR, Ahmaruzzaman M. Tin oxide based nanostructured materials: synthesis and potential applications. NANOSCALE 2022; 14:1566-1605. [PMID: 35072188 DOI: 10.1039/d1nr07040a] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In view of their inimitable characteristics and properties, SnO2 nanomaterials and nanocomposites have been used not only in the field of diverse advanced catalytic technologies and sensors but also in the field of energy storage such as lithium-ion batteries and supercapacitors, and in the field of energy production such as solar cells and water splitting. This review discusses the various synthesis techniques such as traditional methods, including processes like thermal decomposition, chemical vapor deposition, electrospinning, sol-gel, hydrothermal, solvothermal, and template-mediated methods and green methods, which include synthesis through plant-mediated, microbe-mediated, and biomolecule-mediated processes. Moreover, the advantages and limitations of these synthesis procedures and how to overcome them that would lead to future research are also discussed. This literature also focuses on various applications such as environmental remediation, energy production, energy storage, and removal of biological contaminants. Therefore, the rise and journey of SnO2-based nanocomposites will motivate the modern generation of chemists to modify and design robust nanoparticles and nanocomposites that can effectively tackle significant environmental challenges. This overview concludes by providing future perspectives on research into tin oxide in synthesis and its various applications.
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Affiliation(s)
- Soumya Ranjan Mishra
- Department of Chemistry, National Institute of Technology, Silchar - 788010, Assam, India.
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology, Silchar - 788010, Assam, India.
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14
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Qiang C, Li N, Zuo S, Guo Z, Zhan W, Li Z, Ma J. Microwave-assisted synthesis of RuTe2/black TiO2 photocatalyst for enhanced diclofenac degradation: Performance, mechanistic investigation and intermediates analysis. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120214] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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TiO2/SnO2 nano-composite: New insights in synthetic, structural, optical and photocatalytic aspects. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120640] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Bohač M, Čižmar T, Kojić V, Marčec J, Juraić K, Grčić I, Gajović A. Novel, Simple and Low-Cost Preparation of Ba-Modified TiO 2 Nanotubes for Diclofenac Degradation under UV/Vis Radiation. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2714. [PMID: 34685154 PMCID: PMC8538042 DOI: 10.3390/nano11102714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/06/2021] [Accepted: 10/12/2021] [Indexed: 11/21/2022]
Abstract
A novel low-cost synthesis of barium-modified TiO2 nanotube (TNT) arrays was used to obtain an immobilized photocatalyst for degradation of diclofenac. TNT arrays were prepared by electrochemical anodization of titanium thin films deposited on fluorine-doped tin oxide (FTO) coated glass by magnetron sputtering, ensuring transparency and immobilization of the nanotubes. The Ba-modifications were obtained by annealing solutions of Ba(OH)2 spin coated on top of TNT. Three different concentrations of Ba(OH)2 were used (12.5 mM, 25 mM and 50 mM). The crystalline structure, morphology and presence of Ba were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. Ba-modified TiO2 nanotubes (BTNT) were tested for photocatalytic degradation of diclofenac under UV/Vis radiation and it was proven that all of the Ba-modified samples showed an increase in photocatalytic activity with respect to the unmodified TNTs. The most efficient photocatalyst was the sample prepared with 25 mM Ba(OH)2 which showed 90% diclofenac degradation after 60 min. This result was in agreement with cyclic voltammetry measurements that showed the largest increase in photo-oxidation current densities for the same sample due to the increased generation of •OH radicals obtained by a more efficient photogenerated charge separation.
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Affiliation(s)
- Mario Bohač
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Tihana Čižmar
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Vedran Kojić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Jan Marčec
- Faculty of Geotechnical Engineering, University of Zagreb, Hallerova aleja 7, 42000 Varaždin, Croatia
| | - Krunoslav Juraić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
| | - Ivana Grčić
- Faculty of Geotechnical Engineering, University of Zagreb, Hallerova aleja 7, 42000 Varaždin, Croatia
| | - Andreja Gajović
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
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Abstract
TiO2 is a semiconductor material with high chemical stability and low toxicity. It is widely used in the fields of catalysis, sensing, hydrogen production, optics and optoelectronics. However, TiO2 photocatalyst is sensitive to ultraviolet (UV) light; this is why its photocatalytic activity and quantum efficiency are reduced. To enhance the photocatalytic efficiency in the visible light range as well as to increase the number of the active sites on the crystal surface or inhibit the recombination rate of photogenerated electron–hole pairs electrons, various metal ions were used to modify TiO2. This review paper comprehensively summarizes the latest progress on the modification of TiO2 photocatalyst by a variety of metal ions. Lastly, the future prospects of the modification of TiO2 as a photocatalyst are proposed.
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SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation under Extended Solar Irradiation. Catalysts 2021. [DOI: 10.3390/catal11050589] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and optical properties. This study focuses on the photocatalytic activity of flower-like SnS2 nanoparticles (composed of nanosheet subunits) embedded in TiO2 synthesized by a facile hydrothermal method. The materials were characterized using different techniques, and their photocatalytic activity was assessed for hydrogen evolution reaction and the degradation of methylene blue. Among the catalysts studied, 10 wt. % of SnS2 loaded TiO2 nanocomposite shows an optimum hydrogen evolution rate of 195.55 µmolg−1, whereas 15 wt. % loading of SnS2 on TiO2 exhibits better performance against the degradation of methylene blue (MB) with the rate constant of 4.415 × 10−4 s−1 under solar simulated irradiation. The improved performance of these materials can be attributed to the effective photo-induced charge transfer and reduced recombination, which make these nanocomposite materials promising candidates for the development of high-performance next-generation photocatalyst materials. Further, scavenging experiments were carried out to confirm the reactive oxygen species (ROS) involved in the photocatalytic degradation. It can be observed that there was a 78% reduction in the rate of degradation when IPA was used as the scavenger, whereas around 95% reduction was attained while N2 was used as the scavenger. Notably, very low degradation (<5%) was attained when the dye alone was directly under solar irradiation. These results further validate that the •OH radical and the superoxide radicals can be acknowledged for the degradation mechanism of MB, and the enhancement of degradation efficiency may be due to the combined effect of in situ dye sensitization during the catalysis and the impregnation of low bandgap materials on TiO2.
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19
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Albornoz LL, da Silva SW, Bortolozzi JP, Banús ED, Brussino P, Ulla MA, Bernardes AM. Degradation and mineralization of erythromycin by heterogeneous photocatalysis using SnO2-doped TiO 2 structured catalysts: Activity and stability. CHEMOSPHERE 2021; 268:128858. [PMID: 33187661 DOI: 10.1016/j.chemosphere.2020.128858] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 10/05/2020] [Accepted: 10/31/2020] [Indexed: 06/11/2023]
Abstract
Heterogeneous photocatalysis was used for the degradation and mineralization of erythromycin (ERY), with a consequent production of carboxylic acids. For that, a series of TiO2 and Ti1-xSnxO2 structured catalysts, namely M1 to M5, was prepared using the washcoating method, with the catalytic coatings being deposited onto stainless steel meshes. Besides, the catalytic activity of the prepared systems was compared to that of the commercial mesh (CM). The results showed that the prepared TiO2 structured catalyst (M1) presented better ERY oxidation than the CM one, what was associated to the higher catalyst load and to the anatase/rutile ratio. Considering the Sn-doped structured catalysts, for M2, M4 and M5 catalysts, lower ERY mineralization and high formation of carboxylic acids were found, when compared to the M3 catalyst. The improved M3 activity was attributed to the formation of a staggered gap (type II heterojunction), providing better charge separation. In this situation, a high generation of hydroxyl radicals is obtained, resulting on a higher ERY mineralization. By the obtained results it is possible to determine that the addition order and the type of Sn compound added in the washcoating process, affects the catalytic activity due to the formation of a solid solution and to the type of produced heterostructures. The M3 catalyst also showed high stability in long-term tests up to 44 h of reaction. The results provide insights into the development of an inexpensive structured catalyst production method and its influence in the stability of the photocatalyst, as well as in its applicability on water/wastewater treatment.
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Affiliation(s)
- L L Albornoz
- Universidade Federal do Rio Grande do Sul (UFRGS) - Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Av. Bento Gonçalves, 9500, Porto Alegre, RS, Brazil; Instituto de Investigaciones en Catálisis y Petroquímica - INCAPE (UNL - CONICET), Santiago del Estero 2829, 3000, Santa Fe, Argentina
| | - S W da Silva
- UFRGS, Instituto de Pesquisas Hidráulicas (IPH) - Programa de Pós-Graduação em Recursos Hídricos e Saneamento Ambiental, Av. Bento Gonçalves, 9500, Porto Alegre, RS, Brazil.
| | - J P Bortolozzi
- Instituto de Investigaciones en Catálisis y Petroquímica - INCAPE (UNL - CONICET), Santiago del Estero 2829, 3000, Santa Fe, Argentina
| | - E D Banús
- Instituto de Investigaciones en Catálisis y Petroquímica - INCAPE (UNL - CONICET), Santiago del Estero 2829, 3000, Santa Fe, Argentina
| | - P Brussino
- Instituto de Investigaciones en Catálisis y Petroquímica - INCAPE (UNL - CONICET), Santiago del Estero 2829, 3000, Santa Fe, Argentina
| | - M A Ulla
- Instituto de Investigaciones en Catálisis y Petroquímica - INCAPE (UNL - CONICET), Santiago del Estero 2829, 3000, Santa Fe, Argentina
| | - A M Bernardes
- Universidade Federal do Rio Grande do Sul (UFRGS) - Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Av. Bento Gonçalves, 9500, Porto Alegre, RS, Brazil
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20
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A facile synthesis of bismuth oxychloride-graphene oxide composite for visible light photocatalysis of aqueous diclofenac sodium. Sci Rep 2020; 10:14191. [PMID: 32843698 PMCID: PMC7447784 DOI: 10.1038/s41598-020-71139-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/31/2020] [Indexed: 12/20/2022] Open
Abstract
In this study, bismuth oxychloride/graphene oxide (BiOCl-GO) composite was fabricated by facile one pot hydrothermal method. The pure BiOCl and BiOCl-GO composite was characterized by X-ray diffraction, Transmission electron microscopy X-ray photoelectron spectroscopy and UV-Vis diffuse reflectance spectroscopy. The synthesized composite was then assessed for photocatalytic degradation of diclofenac sodium (DCF) in visible as well as direct solar light and UV irradiation. Results indicated that the photocatalytic removal efficiency of DCF was significantly affected by dose of catalysts, pH value and source of light. The results reveled that degradation efficiency of BiOCl-GO for DCF reduced from 100 to 34.4% with the increases in DCF initial concentration from 5 mg L-1 to 25 mg L-1. The solar light degradation of DCF using BiOCl-GO was achieved with apparent rate constant 0.0037 min-1. The effect of scavengers study revealed that superoxide ions and holes were mainly responsible for DCF degradation. The regeneration study indicates that BiOCl-GO composite can be successfully recycled up to the five cycles. The study revealed the effectiveness of one pot hydrothermal method for the fabrication of BiOCl-GO composite.
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21
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da Silva THG, Furtado RXDS, Zaiat M, Azevedo EB. Tandem anaerobic-aerobic degradation of ranitidine, diclofenac, and simvastatin in domestic sewage. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 721:137589. [PMID: 32171136 DOI: 10.1016/j.scitotenv.2020.137589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 02/24/2020] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
There is a consensus among scientists that domestic sewage treatment plants are the main sources of drugs entry into the aquatic environment. Therefore, this work studies the biodegradation of the drugs ranitidine (RNT), diclofenac (DCF), and simvastatin (SVT) (50 μg L-1, each), in real domestic sewage, using a continuous anaerobic-aerobic reactor with immobilized biomass and an anaerobic batch reactor. The continuous anaerobic-aerobic reactor was operated for 6 months with hydraulic retention time (HRT) of 8 h. The initial degradation rates and the maximum oxidation capacities (MOC) of the system were estimated, achieving 90, 72, and 62% removals and 100, 93, and 72% of MOC for RNT, DCF and SVT, respectively, as well as 71% removal of soluble chemical oxygen demand (COD). RNT was degraded throughout the reactor, while DCF was degraded mainly in the two anaerobic chambers and SVT in the first anaerobic chamber. Anaerobic batches were used for the identification of biodegradation by-products (2,6-dichloro-N-(2-methylphenyl) aniline and simvastatin acid), the evaluation of the specific methanogenic activity (SMA) inhibition, and the estimation of acute and chronic ecotoxicities using the ECOSAR 1.11 software. The present study showed that, even at environmental concentrations, RNT, DCF, and SVT were capable of inhibiting the SMA. Lipophilicities dictated the behavior of those three drugs. The greater their lipophilicities, the greater the SMA inhibition and their ecotoxicity.
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Affiliation(s)
- Thiago H G da Silva
- São Carlos, Institute of Chemistry, University of São Paulo, C.P.780, São Carlos, SP CEP 13560-970, Brazil.
| | - Rafaely X de S Furtado
- São Carlos, Institute of Chemistry, University of São Paulo, C.P.780, São Carlos, SP CEP 13560-970, Brazil.
| | - Marcelo Zaiat
- São Carlos School of Engineering, University of São Paulo, C.P.780, São Carlos, SP CEP 13560-970, Brazil.
| | - Eduardo B Azevedo
- São Carlos, Institute of Chemistry, University of São Paulo, C.P.780, São Carlos, SP CEP 13560-970, Brazil.
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22
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Enhanced Photocatalytic Degradation of the Imidazolinone Herbicide Imazapyr upon UV/Vis Irradiation in the Presence of Ca xMnO y-TiO 2 Hetero-Nanostructures: Degradation Pathways and Reaction Intermediates. NANOMATERIALS 2020; 10:nano10050896. [PMID: 32397078 PMCID: PMC7279346 DOI: 10.3390/nano10050896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/29/2020] [Accepted: 04/19/2020] [Indexed: 11/17/2022]
Abstract
The determination of reaction pathways and identification of products of pollutants degradation is central to photocatalytic environmental remediation. This work focuses on the photocatalytic degradation of the herbicide Imazapyr (2-(4-methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl) pyridine-3-carboxylic acid) under UV-Vis and visible-only irradiation of aqueous suspensions of CaxMnOy-TiO2, and on the identification of the corresponding degradation pathways and reaction intermediates. CaxMnOy-TiO2 was formed by mixing CaxMnOy and TiO2 by mechanical grinding followed by annealing at 500 °C. A complete structural characterization of CaxMnOy-TiO2 was carried out. The photocatalytic activity of the hetero-nanostructures was determined using phenol and Imazapyr herbicide as model pollutants in a stirred tank reactor under UV-Vis and visible-only irradiation. Using equivalent loadings, CaxMnOy-TiO2 showed a higher rate (10.6 μM·h−1) as compared to unmodified TiO2 (7.4 μM·h−1) for Imazapyr degradation under UV-Vis irradiation. The mineralization rate was 4.07 µM·h−1 for CaxMnOy-TiO2 and 1.21 μM·h−1 for TiO2. In the CaxMnOy-TiO2 system, the concentration of intermediate products reached a maximum at 180 min of irradiation that then decreased to a half in 120 min. For unmodified TiO2, the intermediates continuously increased with irradiation time with no decrease observed in their concentration. The enhanced efficiency of the CaxMnOy-TiO2 for the complete degradation of the Imazapyr and intermediates is attributed to an increased adsorption of polar species on the surface of CaxMnOy. Based on LC-MS, photocatalytic degradation pathways for Imazapyr under UV-Vis irradiation have been proposed. Some photocatalytic degradation was obtained under visible-only irradiation for CaxMnOy-TiO2. Hydroxyl radicals were found to be main reactive oxygen species responsible for the photocatalytic degradation through radical scavenger investigations.
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23
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Casillas JE, Campa-Molina J, Tzompantzi F, Carbajal Arízaga GG, López-Gaona A, Ulloa-Godínez S, Cano ME, Barrera A. Photocatalytic Degradation of Diclofenac Using Al 2O 3-Nd 2O 3 Binary Oxides Prepared by the Sol-Gel Method. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1345. [PMID: 32188051 PMCID: PMC7142804 DOI: 10.3390/ma13061345] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/02/2020] [Accepted: 03/10/2020] [Indexed: 02/05/2023]
Abstract
This paper reports the sol-gel synthesis of Al2O3-Nd2O3 (Al-Nd-x; x = 5%, 10%, 15% and 25% of Nd2O3) binary oxides and the photodegradation of diclofenac activated by UV light. Al-Nd-based catalysts were analyzed by N2 physisorption, XRD, TEM, SEM, UV-Vis and PL spectroscopies. The inclusion of Nd2O3 in the aluminum oxide matrix in the 10-25% range reduced the band gap energies from 3.35 eV for the γ-Al2O3 to values as low as 3.13-3.20 eV, which are typical of semiconductor materials absorbing in the UV region. γ-Al2O3 and Al-Nd-x binary oxides reached more than 92.0% of photoconverted diclofenac after 40 min of reaction. However, the photocatalytic activity in the diclofenac degradation using Al-Nd-x with Nd2O3 contents in the range 10-25% was improved with respect to that of γ-Al2O3 at short reaction times. The diclofenac photoconversion using γ-Al2O3 was 63.0% at 10 min of UV light exposure, whereas Al-Nd-15 binary oxide reached 82.0% at this reaction time. The rate constants determined from the kinetic experiments revealed that the highest activities in the aqueous medium were reached with the catalysts with 15% and 25% of Nd2O3, and these compounds presented the lowest band gap energies. The experimental results also demonstrated that Nd2O3 acts as a separator of charges favoring the decrease in the recombination rate of electron-hole pairs.
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Affiliation(s)
- José Eduardo Casillas
- Departamento de Ciencias Básicas, Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad, No. 1115, Ocotlán C.P. 47820, Jalisco, Mexico; (J.E.C.); (M.E.C.)
| | - Jorge Campa-Molina
- Departamento de Electrónica, Universidad de Guadalajara, Marcelino García Barragán 1422, Guadalajara C.P. 44430, Jalisco, Mexico; (J.C.-M.); (S.U.-G.)
| | - Francisco Tzompantzi
- Departamento de Química, Universidad Autónoma Metropolitana—Iztapalapa, San Rafael Atlixco 189, Ciudad de México C.P. 09340, Mexico; (F.T.); (A.L.-G.)
| | | | - Alejandro López-Gaona
- Departamento de Química, Universidad Autónoma Metropolitana—Iztapalapa, San Rafael Atlixco 189, Ciudad de México C.P. 09340, Mexico; (F.T.); (A.L.-G.)
| | - Sandra Ulloa-Godínez
- Departamento de Electrónica, Universidad de Guadalajara, Marcelino García Barragán 1422, Guadalajara C.P. 44430, Jalisco, Mexico; (J.C.-M.); (S.U.-G.)
| | - Mario Eduardo Cano
- Departamento de Ciencias Básicas, Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad, No. 1115, Ocotlán C.P. 47820, Jalisco, Mexico; (J.E.C.); (M.E.C.)
| | - Arturo Barrera
- Departamento de Ciencias Básicas, Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad, No. 1115, Ocotlán C.P. 47820, Jalisco, Mexico; (J.E.C.); (M.E.C.)
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24
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Sathishkumar P, Meena RAA, Palanisami T, Ashokkumar V, Palvannan T, Gu FL. Occurrence, interactive effects and ecological risk of diclofenac in environmental compartments and biota - a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 698:134057. [PMID: 31783460 DOI: 10.1016/j.scitotenv.2019.134057] [Citation(s) in RCA: 181] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 08/17/2019] [Accepted: 08/21/2019] [Indexed: 05/17/2023]
Abstract
Diclofenac, a nonsteroidal anti-inflammatory drug has turned into a contaminant of emerging concern; hence, it was included in the previous Watch List of the EU Water Framework Directive. This review paper aims to highlight the metabolism of diclofenac at different trophic levels, its occurrence, ecological risks, and interactive effects in the water cycle and biota over the past two decades. Increased exposure to diclofenac not only raises health concerns for vultures, aquatic organisms, and higher plants but also causes serious threats to mammals. The ubiquitous nature of diclofenac in surface water (river, lake canal, estuary, and sea) is compared with drinking water, groundwater, and wastewater effluent in the environment. This comprehensive survey from previous studies suggests the fate of diclofenac in wastewater treatment plants (WWTPs) and may predict its persistence in the environment. This review offers evidence of fragmentary available data for the water environment, soil, sediment, and biota worldwide and supports the need for further data to address the risks associated with the presence of diclofenac in the environment. Finally, we suggest that the presence of diclofenac and its metabolites in the environment may represent a high risk because of their synergistic interactions with existing contaminants, leading to the development of drug-resistant strains and the formation of newly emerging pollutants.
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Affiliation(s)
- Palanivel Sathishkumar
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China
| | | | - Thavamani Palanisami
- Global Centre for Environmental Remediation (GCER), University of Newcastle, Callaghan, NSW 2308, Australia
| | - Veeramuthu Ashokkumar
- Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals (CBRC), Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Thayumanavan Palvannan
- Laboratory of Bioprocess and Engineering, Department of Biochemistry, Periyar University, Salem 636 011, Tamil Nadu, India
| | - Feng Long Gu
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China.
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25
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Khasawneh OFS, Palaniandy P, Teng LP. Large-scale study for the photocatalytic degradation of paracetamol using Fe 2O 3/TiO 2 nanocomposite catalyst and CPC reactor under natural sunlight radiations. MethodsX 2019; 6:2735-2743. [PMID: 31788439 PMCID: PMC6879991 DOI: 10.1016/j.mex.2019.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 11/14/2019] [Indexed: 02/08/2023] Open
Abstract
Heterogeneous photocatalysis is a promising advanced oxidation process for the degradation of emerging contaminants. In this regard, Hematite (α-Fe2O3) doped TiO2 nanocomposite catalyst was synthesized via sol-gel method. The catalyst was prepared in large quantities (225 g) comparatively with other studies and characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray (EDX), and nitrogen gas physisorption studies. The bandgap of the synthesized catalyst was determined using UV-vis diffused reflectance spectroscopy (DRS), and the point of zero charge (PZC) was identified by measuring the zeta potential (ζ-potential) of the nanoparticles. A large-scale study was conducted using a modified Compound Parabolic Collector Reactor (CPCR) for the degradation of paracetamol under natural sunlight irradiations. The operating parameters including the initial concentration of paracetamol, initial pH of the solution, and catalyst loading were optimized using face-centered central composite design (FCCD) based on response surface method (RSM) to obtain the maximum degradation efficiency of paracetamol. •The simplified and direct sol-gel method described helps in the synthesis of a novel nanocomposite catalyst (Fe2O3/TiO2) in large quantities while maintaining good characteristics compared to other methods.•The described treatment method using the modified CPCR will allow the degradation of paracetamol in a more sustainable and green manner.•Optimizing the operating parameters that have a significant influence on the degradation of paracetamol will contribute towards higher degradation rates.
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Affiliation(s)
- Omar Fawzi Suleiman Khasawneh
- School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
| | - Puganeshwary Palaniandy
- School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
| | - Lum Pei Teng
- School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
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26
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Yao S, Zhou S, Wang J, Li W, Li Z. Optimizing the synthesis of SnO 2/TiO 2/RGO nanocomposites with excellent visible light photocatalytic and antibacterial activities. Photochem Photobiol Sci 2019; 18:2989-2999. [PMID: 31763667 DOI: 10.1039/c9pp00242a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Multifunctional SnO2/TiO2/RGO nanocomposites with enhanced photocatalytic degradation and antibacterial activity have been successfully synthesized by a facile one-pot environmentally friendly green hydrothermal route using titanium tetrabutoxide (TBOT), Na2SnO3 and graphene oxide (GO) without reducing agents and any structure-directing agents. The results demonstrate that the reaction pH conditions play important roles in the control of the crystallographic phases of TiO2 and SnO2. In addition, the visible-light-active photocatalytic and antibacterial activities of the synthesized composites were measured for the degradation of rhodamine B (RhB) and the growth inhibition of the Gram-negative bacteria Escherichia coli (E. coli), which are strongly affected by the SnO2 loading content, the crystal structure of TiO2 and the appropriate addition of graphene. The superior photocatalytic and antibacterial activities of the nanocomposites were attributed to their great optical adsorption capability and excellent charge separation and transfer efficiency. This study may provide new insights into the fabrication of efficient visible-light-active SnO2/TiO2/RGO nanocomposites and expand their applications in the environmental remediation and water disinfection fields.
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Affiliation(s)
- Shujuan Yao
- School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252000, P. R. China
| | - Shanshan Zhou
- School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252000, P. R. China
| | - Jie Wang
- School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252000, P. R. China
| | - Wenzhi Li
- School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252000, P. R. China
| | - Zhihui Li
- Clinical laboratory, Liaocheng People's Hospital of Taishan Medical University, Liaocheng, 252000, P. R. China.
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27
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Shanmugaratnam S, Velauthapillai D, Ravirajan P, Christy AA, Shivatharsiny Y. CoS 2/TiO 2 Nanocomposites for Hydrogen Production under UV Irradiation. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3882. [PMID: 31771298 PMCID: PMC6926893 DOI: 10.3390/ma12233882] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/18/2019] [Accepted: 11/22/2019] [Indexed: 02/05/2023]
Abstract
Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen production efficiencies of cobalt disulfide (CoS2)-embedded TiO2 nanocomposites. Materials are synthesized by using a hydrothermal approach and the hydrogen production efficiencies of pristine CoS2, TiO2 nanoparticles and CoS2/TiO2 nanocomposites are compared under UV irradiation. A higher amount of hydrogen production (2.55 mmol g-1) is obtained with 10 wt.% CoS2/TiO2 nanocomposite than pristineTiO2 nanoparticles, whereas no hydrogen production was observed with pristine CoS2 nanoparticles. This result unveils that the metal dichalcogenide-CoS2 acts as an effective co-catalyst and nanocrystalline TiO2 serves as an active site by effectively separating the photogenerated electron-hole pair. This study lays down a new approach for developing transition metal dichalcogenide materials with significant bandgaps that can effectively harness solar energy for hydrogen production.
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Affiliation(s)
- Sivagowri Shanmugaratnam
- Faculty of Engineering and Science, Western Norway University of Applied Sciences, 5020 Bergen, Norway;
- Clean Energy Research Laboratory, Department of Physics, University of Jaffna, Jaffna 40000, Sri Lanka;
| | - Dhayalan Velauthapillai
- Faculty of Engineering and Science, Western Norway University of Applied Sciences, 5020 Bergen, Norway;
| | - Punniamoorthy Ravirajan
- Clean Energy Research Laboratory, Department of Physics, University of Jaffna, Jaffna 40000, Sri Lanka;
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