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Zamisa MK, Seadira TW, Baloyi SJ. Transforming wastewater treatment: Recent advancements in Catalytic Wet Air Oxidation with pillared clay catalysts for phenol remediation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 361:124842. [PMID: 39209055 DOI: 10.1016/j.envpol.2024.124842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 08/25/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Catalytic Wet Air Oxidation (CWAO) has recently been recognized as a promising technique for degrading persistent organic pollutants, such as phenol, in wastewater. Among various catalysts, Pillared Interlayer Clays (PILCs) stand out due to their high specific surface area and porous nature. This review delves into the latest progress in CWAO processes utilizing PILCs for the degradation of organic contaminants such as phenol in wastewater. It meticulously assesses the synthesis of PILCs, and their structural properties, including monolithic forms, to understand their effect on catalyst efficiency. Key insights into how these attributes affect the phenol degradation rate and the CWAO process's stability are discussed, providing crucial direction for enhancing catalyst performance. The review highlights the significance of choosing catalysts that offer a balance between cost-efficiency and operational efficacy under mild conditions. The recent results are reported, summarized, and compared, thus proving the feasibility of using PILCs as promising materials for phenol removal. The reaction parameters, phenol conversion, and degradation mechanisms are highlighted. The catalytic efficiency of PILCs was significantly affected by the synthesis methods and reaction parameters, and outperformed most costly catalysts. PILCs are highlighted as especially advantageous catalysts, offering strong performance at lower costs, which boosts the up-scaling opportunities of CWAO methods. This analysis also points out research gaps and proposes directions for future studies, such as exploring innovative PILC synthesis methods to improve their catalytic effectiveness and durability further. It stresses the need to incorporate environmental and sustainability considerations into catalyst design and selection, aligning with the principles of green chemistry in wastewater treatment. Finally, we conclude that proposing new directions for PILCs in CWAO in further naturally-based surface modifications, is also a promising approach for PILCs to perform more efficiently.
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Affiliation(s)
- Mantsopa K Zamisa
- Department of Chemical and Materials Engineering, University of South Africa, Florida Park, Roodepoort, 1710, South Africa.
| | - Tumelo W Seadira
- Department of Chemical and Materials Engineering, University of South Africa, Florida Park, Roodepoort, 1710, South Africa.
| | - Siwela J Baloyi
- Smart Places Cluster, Council for Scientific and Industrial Research (CSIR), Pretoria, 0001, South Africa
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2
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Kim MS, Yoon JH, Kim HM, Lee DJ, Hirose T, Takeda Y, Kim JP. Amplifying Photochromic Response in Tungsten Oxide Films with Titanium Oxide and Polyvinylpyrrolidone. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1121. [PMID: 38998726 PMCID: PMC11243557 DOI: 10.3390/nano14131121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 06/26/2024] [Accepted: 06/27/2024] [Indexed: 07/14/2024]
Abstract
Tungsten oxide (WO3) is known for its photochromic properties, making it useful for smart windows, displays, and sensors. However, its small bandgap leads to rapid recombination of electron-hole pairs, resulting in poor photochromic performance. This study aims to enhance the photochromic properties of WO3 by synthesizing hexagonal tungsten oxide via hydrothermal synthesis, which increases surface area and internal hydrates. Titanium oxide (TiO2) was adsorbed onto the tungsten oxide to inject additional charges and reduce electron-hole recombination. Additionally, polyvinylpyrrolidone (PVP) was used to improve dispersion in organic solvents, allowing for the fabrication of high-quality films using the doctor blade method. Characterization confirmed the enhanced surface area, crystal structure, and dispersion stability. Reflectance and transmittance measurements demonstrated significant improvements in photochromic properties due to the composite structure. These findings suggest that the introduction of TiO2 and PVP to tungsten oxide effectively enhances its photochromic performance, broadening its applicability in various advanced photochromic applications.
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Affiliation(s)
- Min-Sung Kim
- Lab of Organic Photo-Functional Materials, Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jun-Ho Yoon
- Lab of Organic Photo-Functional Materials, Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hong-Mo Kim
- Semiconductor Analysis Team, Advanced Institute of Convergence Technology, 145 Gwanggyo-ro, Yeongtong-gu, Suwon-si 16229, Republic of Korea
| | - Dong-Jun Lee
- Lab of Organic Photo-Functional Materials, Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Tamaki Hirose
- Hydrogen Related Materials Group, Research Center for Energy and Environmental Materials, National Institute for Materials Science (NIMS), Tsukuba 305-0003, Japan
| | - Yoshihiko Takeda
- Hydrogen Related Materials Group, Research Center for Energy and Environmental Materials, National Institute for Materials Science (NIMS), Tsukuba 305-0003, Japan
| | - Jae-Pil Kim
- Lab of Organic Photo-Functional Materials, Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
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3
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Pincella F, Isozaki K, Sato R, Teranishi T, Takaya H, Nakamura M. Reusable Magnetite Nanoparticle (Fe 3O 4 NP) Catalyst for Selective Oxidation of Alcohols under Microwave Irradiation. ACS OMEGA 2024; 9:24477-24488. [PMID: 38882095 PMCID: PMC11170727 DOI: 10.1021/acsomega.4c00361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/16/2024] [Accepted: 04/22/2024] [Indexed: 06/18/2024]
Abstract
Iron oxide nanoparticles (NPs) are nontoxic and abundant materials which have long been investigated as reusable catalysts in oxidation reactions, but their use so far has been hampered by a low selectivity. Here, unsupported iron oxide NPs have been found to successfully catalyze the microwave-assisted oxidation of primary and secondary alcohols to their respective aldehydes and ketones with a high selectivity when N-methylmorpholine N-oxide was used as the terminal oxidant. The crystalline phase and size of the iron-based catalyst have a drastic effect on its activity, with small magnetite (Fe3O4) NPs being the optimal catalyst for this reaction. The nanocatalyst could be easily recovered by magnetoseparation and successfully recycled four times without any need for special pretreatment or reactivation step and with a minimal loss of activity. The subsequent loss of activity was attributed to the transition from magnetite (Fe3O4) to maghemite (γ-Fe2O3), as confirmed by X-ray diffraction, Fourier transform infrared, and X-ray absorption near-edge spectroscopy. The nanocatalyst could then be reactivated by the high-temperature microwave treatment and used again for the microwave-assisted oxidation reaction.
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Affiliation(s)
- Francesca Pincella
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Katsuhiro Isozaki
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Ryota Sato
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Toshiharu Teranishi
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Hikaru Takaya
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Masaharu Nakamura
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
- Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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4
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Senthil Rathi B, Ewe LS, S S, S S, Yew WK, R B, Tiong SK. Recent trends and advancement in metal oxide nanoparticles for the degradation of dyes: synthesis, mechanism, types and its application. Nanotoxicology 2024; 18:272-298. [PMID: 38821108 DOI: 10.1080/17435390.2024.2349304] [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: 01/15/2024] [Accepted: 03/30/2024] [Indexed: 06/02/2024]
Abstract
Synthetic dyes play a crucial role in our daily lives, especially in clothing, leather accessories, and furniture manufacturing. Unfortunately, these potentially carcinogenic substances are significantly impacting our water systems due to their widespread use. Dyes from various sources pose a serious environmental threat owing to their persistence and toxicity. Regulations underscore the urgency in addressing this problem. In response to this challenge, metal oxide nanoparticles such as titanium dioxide (TiO2), zinc oxide (ZnO), and iron oxide (Fe3O4) have emerged as intriguing options for dye degradation due to their unique characteristics and production methods. This paper aims to explore the types of nanoparticles suitable for dye degradation, various synthesis methods, and the properties of nanoparticles. The study elaborates on the photocatalytic and adsorption-desorption activities of metal oxide nanoparticles, elucidating their role in dye degradation and their application potential. Factors influencing degradation, including nanoparticle properties and environmental conditions, are discussed. Furthermore, the paper provides relevant case studies, practical applications in water treatment, and effluent treatment specifically in the textile sector. Challenges such as agglomeration, toxicity concerns, and cost-effectiveness are acknowledged. Future advancements in nanomaterial synthesis, their integration with other materials, and their impact on environmental regulations are potential areas for development. In conclusion, metal oxide nanoparticles possess immense potential in reducing dye pollution, and further research and development are essential to define their role in long-term environmental management.
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Affiliation(s)
- B Senthil Rathi
- Institute of Sustainable Energy, Universiti Tenaga Nasional (UNITEN), Kajang, Selangor, Malaysia
| | - Lay Sheng Ewe
- Institute of Sustainable Energy, Universiti Tenaga Nasional (UNITEN), Kajang, Selangor, Malaysia
| | - Sanjay S
- Department of Chemical Engineering, St. Joseph's College of Engineering, Chennai, India
| | - Sujatha S
- Department of Chemical Engineering, St. Joseph's College of Engineering, Chennai, India
| | - Weng Kean Yew
- School of Engineering and Physical Science, Heriot-Watt University Malaysia, Putrajaya, Malaysia
| | | | - Sieh Kiong Tiong
- Institute of Sustainable Energy, Universiti Tenaga Nasional (UNITEN), Kajang, Selangor, Malaysia
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Hatshan M, Khan M, Assal ME, Shaik MR, Kuniyil M, Al-warthan A, Siddiqui MRH, Adil SF. Green, Solvent-Free Mechanochemical Synthesis of Nano Ag 2O/MnO 2/N-Doped Graphene Nanocomposites: An Efficient Catalyst for Additive-Base-Free Aerial Oxidation of Various Kinds of Alcohols. ACS OMEGA 2024; 9:2770-2782. [PMID: 38250433 PMCID: PMC10795140 DOI: 10.1021/acsomega.3c07865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 01/23/2024]
Abstract
Herein, we report a solvent-less, straightforward, and facile mechanochemical technique to synthesize nanocomposites of Ag2O nanoparticles-doped MnO2, which is further codoped with nitrogen-doped graphene (N-DG) [i.e., (X %)N-DG/MnO2-(1% Ag2O)] using physical milling of separately prepared N-DG and Ag2O NPs-MnO2 annealed at 400 °C over an eco-friendly ball-mill process. To assess the efficiency in terms of catalytic performance of the nanocomposites, selective oxidation of benzyl alcohol (BlOH) to benzaldehyde (BlCHO) is selected as a substrate model with an eco-friendly oxidizing agent (O2 molecule) and without any requirements for the addition of any harmful additives or bases. Various nanocomposites were prepared by varying the amount of N-DG in the composite, and the results obtained highlighted the function of N-DG in the catalyst system when they are compared with the catalyst MnO2-(1% Ag2O) [i.e., undoped catalyst] and MnO2-(1% Ag2O) codoped with different graphene dopants such as GRO and H-RG for alcohol oxidation transformation. The effects of various catalytic factors are systematically evaluated to optimize reaction conditions. The N-DG/MnO2-(1% Ag2O) catalyst exhibits premium specific activity (16.0 mmol/h/g) with 100% BlOH conversion and <99.9% BlCHO selectivity within a very short interval. The mechanochemically prepared N-DG-based nanocomposite displayed higher catalytic efficacy than that of the MnO2-(1% Ag2O) catalyst without the graphene dopant, which is N-DG in this study. A wide array of aromatic, heterocyclic, allylic, primary, secondary, and aliphatic alcohols have been selectively converted to respective ketones and aldehydes with full convertibility without further oxidation to acids over N-DG/MnO2-(1% Ag2O). Interestingly, it is also found that the N-DG/MnO2-(1% Ag2O) can be efficiently reused up to six times without a noteworthy decline in its effectiveness. The prepared nanocomposites were characterized using various analytical, microscopic, and spectroscopic techniques such as X-ray diffraction, thermogravimetric analysis, Fourier-transform infrared spectroscopy, Raman, field emission scanning electron microscopy, and Brunauer-Emmett-Teller.
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Affiliation(s)
- Mohammad
Rafe Hatshan
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mujeeb Khan
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohamed E. Assal
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohammed Rafi Shaik
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mufsir Kuniyil
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulrahman Al-warthan
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | | | - Syed Farooq Adil
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Asghar N, Hussain A, Nguyen DA, Ali S, Hussain I, Junejo A, Ali A. Advancement in nanomaterials for environmental pollutants remediation: a systematic review on bibliometrics analysis, material types, synthesis pathways, and related mechanisms. J Nanobiotechnology 2024; 22:26. [PMID: 38200605 PMCID: PMC10777661 DOI: 10.1186/s12951-023-02151-3] [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: 06/07/2023] [Accepted: 10/09/2023] [Indexed: 01/12/2024] Open
Abstract
Environmental pollution is a major issue that requires effective solutions. Nanomaterials (NMs) have emerged as promising candidates for pollution remediation due to their unique properties. This review paper provides a systematic analysis of the potential of NMs for environmental pollution remediation compared to conventional techniques. It elaborates on several aspects, including conventional and advanced techniques for removing pollutants, classification of NMs (organic, inorganic, and composite base). The efficiency of NMs in remediation of pollutants depends on their dispersion and retention, with each type of NM having different advantages and disadvantages. Various synthesis pathways for NMs, including traditional synthesis (chemical and physical) and biological synthesis pathways, mechanisms of reaction for pollutants removal using NMs, such as adsorption, filtration, disinfection, photocatalysis, and oxidation, also are evaluated. Additionally, this review presents suggestions for future investigation strategies to improve the efficacy of NMs in environmental remediation. The research so far provides strong evidence that NMs could effectively remove contaminants and may be valuable assets for various industrial purposes. However, further research and development are necessary to fully realize this potential, such as exploring new synthesis pathways and improving the dispersion and retention of NMs in the environment. Furthermore, there is a need to compare the efficacy of different types of NMs for remediating specific pollutants. Overall, this review highlights the immense potential of NMs for mitigating environmental pollutants and calls for more research in this direction.
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Affiliation(s)
- Nosheen Asghar
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
| | - Alamdar Hussain
- Department of Botany, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan
| | - Duc Anh Nguyen
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Salar Ali
- Department of Environmental Science, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan
| | - Ishtiaque Hussain
- Department of Environmental Science, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan
- Department of Environmental Science, Quaid-i-Azam University of Islamabad, Islamabad, 15320, Pakistan
| | - Aurangzeb Junejo
- Department of Global Smart City, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Attarad Ali
- Department of Environmental Science, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan.
- Directorate of Quality Enhancement Cell, University of Baltistan, Skardu 16400, Gilgit-Baltistan, Pakistan.
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7
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Al-Mohaimeed AM, Al Omar SY, El-Tohamy MF. Fast and novel multiwalled carbon nanotubes decorated with metal oxide nanoparticles for potentiometric detection of a prohibited medication in sports acebutolol hydrochloride. Heliyon 2023; 9:e20997. [PMID: 37876475 PMCID: PMC10590941 DOI: 10.1016/j.heliyon.2023.e20997] [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: 06/06/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/26/2023] Open
Abstract
A straightforward approach for creating fast and novel potentiometric sensors that are modified with multi-walled nanotubes (MWCNTs) was described. The impact of the selective sensor's material was studied. The suggested sensors were successfully fabricated for instant and fast detection of the prohibited β-adrenoreceptor blocking agent acebutolol hydrochloride (AC) in commercial products. Acebutolol-phosphomolybdate (AC-PM) carbon paste sensor was formed by mixing AC and phosphomolybdic acid and graphite powder in the presence of o-nitrophenyl octyl ether (o-NPOE) as a plasticizing agent. The functionalized AC-PM-MWCNTs and AC-PM-MWCNTs-Al2O3 nanocomposite sensors were prepared and all parameters affecting the sensors' potential responses have been investigated as well as the green synthesis of Al2O3NPs has been characterized using various microscopic and spectroscopic techniques. AC-PM-MWCNTs and AC-PM-MWCNTs-Al2O3 nanocomposite sensors demonstrated linearity of 1.0 × 10-7-1.0 × 10-2 and 1.0 × 10-8-1.0 × 10-2 mol L-1, respectively with regression equations -53.571x + 423.24 (r = 0.999) and -57.107x + 518.54 (r = 0.999). It also revealed excellent selectivity and sensitivity for the determination and quantification of AC. The developed potentiometric system was suitable for the determination of AC in bulk powder and commercial products.
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Affiliation(s)
- Amal M. Al-Mohaimeed
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Suliman Y. Al Omar
- Doping Research Chair, Zoology Department, College of Science, King Saud University, Riyadh University, Riyadh, 11451, Saudi Arabia
| | - Maha F. El-Tohamy
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
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Pal N, Chakraborty D, Cho EB, Seo JG. Recent Developments on the Catalytic and Biosensing Applications of Porous Nanomaterials. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2184. [PMID: 37570502 PMCID: PMC10420944 DOI: 10.3390/nano13152184] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023]
Abstract
Nanoscopic materials have demonstrated a versatile role in almost every emerging field of research. Nanomaterials have come to be one of the most important fields of advanced research today due to its controllable particle size in the nanoscale range, capacity to adopt diverse forms and morphologies, high surface area, and involvement of transition and non-transition metals. With the introduction of porosity, nanomaterials have become a more promising candidate than their bulk counterparts in catalysis, biomedicine, drug delivery, and other areas. This review intends to compile a self-contained set of papers related to new synthesis methods and versatile applications of porous nanomaterials that can give a realistic picture of current state-of-the-art research, especially for catalysis and sensor area. Especially, we cover various surface functionalization strategies by improving accessibility and mass transfer limitation of catalytic applications for wide variety of materials, including organic and inorganic materials (metals/metal oxides) with covalent porous organic (COFs) and inorganic (silica/carbon) frameworks, constituting solid backgrounds on porous materials.
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Affiliation(s)
- Nabanita Pal
- Department of Physics and Chemistry, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad 500075, India;
| | - Debabrata Chakraborty
- Institute for Applied Chemistry, Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea;
| | - Eun-Bum Cho
- Institute for Applied Chemistry, Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea;
| | - Jeong Gil Seo
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
- Clean-Energy Research Institute, Hanyang University, Seoul 04763, Republic of Korea
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Devesa S, Gonçalves F, Graça M. Influence of the Preparation Method on the Structural, Morphological and Dielectric Properties of FeNbO 4 Ceramics. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3202. [PMID: 37110041 PMCID: PMC10145454 DOI: 10.3390/ma16083202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/30/2023] [Accepted: 04/12/2023] [Indexed: 06/19/2023]
Abstract
In this work, iron niobate (FeNbO4) was prepared via two processes based on the sol-gel method: colloidal gel and polymeric gel. The obtained powders were submitted to heat treatments at different temperatures based on the results obtained via differential thermal analysis. The structures of the prepared samples were characterized via X-ray diffraction and the morphology was characterized via scanning electron microscopy. The dielectric measurements were performed in the radiofrequency region using the impedance spectroscopy technique and in the microwave range using the resonant cavity method. The influence of the preparation method was noticeable in the structural, morphological and dielectric properties of the studied samples. The polymeric gel method promoted the formation of monoclinic and orthorhombic iron niobate at lower temperatures. The differences in the samples' morphology were also remarkable, both in the size and shape of the grains. The dielectric characterization revealed that the dielectric constant and the dielectric losses had the same order of magnitude and similar trends. A relaxation mechanism was identified in all the samples.
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Affiliation(s)
- Susana Devesa
- CFisUC, Physics Department, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal
| | - Filipa Gonçalves
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Manuel Graça
- I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal
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Matějová L, Troppová I, Pitkäaho S, Pacultová K, Fridrichová D, Kania O, Keiski R. Oxidation of Methanol and Dichloromethane on TiO 2-CeO 2-CuO, TiO 2-CeO 2 and TiO 2-CuO@VUKOPOR ®A Ceramic Foams. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1148. [PMID: 37049242 PMCID: PMC10096961 DOI: 10.3390/nano13071148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
The application-attractive form of TiO2, CeO2 and CuO-based open-cell foam supported catalysts was designed to investigate their catalytic performance in oxidation of two model volatile organic compounds-methanol and dichloromethane. TiO2-CeO2, TiO2-CuO and TiO2-CeO2-CuO catalysts as thin films were deposited on VUKOPOR®A ceramic foam using a reverse micelles-controlled sol-gel method, dip-coating and calcination. Three prepared catalytic foams were investigated via light-off tests in methanol and dichloromethane oxidation in the temperature range of 45-400 °C and 100-500 °C, respectively, at GHSV of 11, 600 h-1, which fits to semi-pilot/industrial conditions. TiO2-CuO@VUKOPOR®A foam showed the best catalytic activity and CO2 yield in methanol oxidation due to its low weak Lewis acidity, high weak basicity and easily reducible CuO species and proved good catalytic stability within 20 h test. TiO2-CeO2-CuO@VUKOPOR®A foam was the best in dichloromethane oxidation. Despite of its lower catalytic activity compared to TiO2-CeO2@VUKOPOR®A foam, its highly-reducible -O-Cu-Ce-O- active surface sites led to the highest CO2 yield and the highest weak Lewis acidity contributed to the highest HCl yield. This foam also showed the lowest amount of chlorine deposits.
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Affiliation(s)
- Lenka Matějová
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Ivana Troppová
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Satu Pitkäaho
- Environmental and Chemical Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
| | - Kateřina Pacultová
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Dagmar Fridrichová
- Institute of Environmental Technology, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Ondřej Kania
- Elvac Ekotechnika s.r.o, Tavičská 337/23, 703 00 Ostrava-Vítkovice, Czech Republic
| | - Riitta Keiski
- Environmental and Chemical Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
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Alhajj M, Safwan Abd Aziz M, Salim A, Sharma S, Kamaruddin W, Ghoshal S. Customization of structure, morphology and optical characteristics of silver and copper nanoparticles: Role of laser fluence tuning. APPLIED SURFACE SCIENCE 2023; 614:156176. [DOI: 10.1016/j.apsusc.2022.156176] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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12
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Influence of gamma radiation on optical, structural and surface morphological properties of WO3 thin films grown by RF sputtering. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2022.110554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Gokhale TA, Phatake VV, Bhanage BM. MnO2 nanostructures as sustainable catalysts for selectivity tuning and syntheses of amine coupling products with bio-derived glycerol. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Ahmad S, Ayoub MH, Khan AM, Waseem A, Yasir M, Khan MS, Bajwa TM, Shaikh AJ. Diverse comparative studies for preferential binding of graphene oxide and transition metal oxide nanoparticles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129057] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Liu M, Zhang G. Amorphous Goethite as a Catalyst of Chemoselectivity Epoxidation of Alkenes by Hydrogen Peroxide. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222080230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Abednatanzi S, Najafi M, Gohari Derakhshandeh P, Van Der Voort P. Metal- and covalent organic frameworks as catalyst for organic transformation: Comparative overview and future perspectives. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214259] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Naikoo GA, Awan T, Salim H, Arshad F, Hassan IU, Pedram MZ, Ahmed W, Faruck HL, Aljabali AAA, Mishra V, Serrano‐Aroca Á, Goyal R, Negi P, Birkett M, Nasef MM, Charbe NB, Bakshi HA, Tambuwala MM. Fourth-generation glucose sensors composed of copper nanostructures for diabetes management: A critical review. Bioeng Transl Med 2022; 7:e10248. [PMID: 35111949 PMCID: PMC8780923 DOI: 10.1002/btm2.10248] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 01/31/2023] Open
Abstract
More than five decades have been invested in understanding glucose biosensors. Yet, this immensely versatile field has continued to gain attention from the scientific world to better understand and diagnose diabetes. However, such extensive work done to improve glucose sensing devices has still not yielded desirable results. Drawbacks like the necessity of the invasive finger-pricking step and the lack of optimization of diagnostic interventions still need to be considered to improve the testing process of diabetic patients. To upgrade the glucose-sensing devices and reduce the number of intermediary steps during glucose measurement, fourth-generation glucose sensors (FGGS) have been introduced. These sensors, made using robust electrocatalytic copper nanostructures, improve diagnostic efficiency and cost-effectiveness. This review aims to present the essential scientific progress in copper nanostructure-based FGGS in the past 10 years (2010 to present). After a short introduction, we presented the working principles of these sensors. We then highlighted the importance of copper nanostructures as advanced electrode materials to develop reliable real-time FGGS. Finally, we cover the advantages, shortcomings, and prospects for developing highly sensitive, stable, and specific FGGS.
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Affiliation(s)
- Gowhar A. Naikoo
- Department of Mathematics and SciencesCollege of Arts and Applied Sciences, Dhofar UniversitySalalahOman
| | - Tasbiha Awan
- Department of Mathematics and SciencesCollege of Arts and Applied Sciences, Dhofar UniversitySalalahOman
| | - Hiba Salim
- Department of Mathematics and SciencesCollege of Arts and Applied Sciences, Dhofar UniversitySalalahOman
| | - Fareeha Arshad
- Department of BiochemistryAligarh Muslim UniversityAligarhIndia
| | | | - Mona Zamani Pedram
- Faculty of Mechanical Engineering—Energy DivisionK.N. Toosi University of TechnologyTehranIran
| | - Waqar Ahmed
- School of Mathematics and PhysicsCollege of Science, University of LincolnLincolnUK
| | | | - Alaa A. A. Aljabali
- Departmnt of Pharmaceutics and Pharmaceutical TechnologyYarmouk UniversityIrbidJordan
| | - Vijay Mishra
- School of Pharmaceutical SciencesLovely Professional UniversityPhagwaraPunjabIndia
| | - Ángel Serrano‐Aroca
- Biomaterials and Bioengineering LabTranslational Research Centre San Alberto Magno, Catholic University of Valencia San Vicente MártirValenciaSpain
| | - Rohit Goyal
- School of Pharmaceutical SciencesShoolini University of Biotechnology and Management SciencesSolanIndia
| | - Poonam Negi
- School of Pharmaceutical SciencesShoolini University of Biotechnology and Management SciencesSolanIndia
| | - Martin Birkett
- Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle upon TyneUK
| | - Mohamed M. Nasef
- Department of PharmacySchool of Applied Science, University of HuddersfieldUK
| | - Nitin B. Charbe
- Department of Pharmaceutical SciencesRangel College of Pharmacy, Texas A&M UniversityKingsvilleTexasUSA
| | - Hamid A. Bakshi
- School of Pharmacy and Pharmaceutical ScienceUlster UniversityColeraineUK
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18
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Mirza-Aghayan M, Saeedi M, Boukherroub R. An efficient CuO/rGO/TiO2 photocatalyst for the synthesis of benzopyranopyrimidine compounds under visible light irradiation. NEW J CHEM 2022. [DOI: 10.1039/d1nj05819c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study reports the synthesis of CuO/rGO/TiO2 in coupling reaction under visible light irradiation. Its photocatalytic performance was explored in a pseudo 4-component and a domino reaction for the synthesis of benzopyranopyrimidine compounds. It can be recovered and recycled for 5 runs.
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Affiliation(s)
- Maryam Mirza-Aghayan
- Chemistry and Chemical Engineering Research Center of Iran (CCERCI), P. O. BOX 14335-186, Tehran, Iran
| | - Mandana Saeedi
- Chemistry and Chemical Engineering Research Center of Iran (CCERCI), P. O. BOX 14335-186, Tehran, Iran
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 – IEMN, F-59000 Lille, France
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19
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Elyasi Z, Reza Najafi G, Safaei Ghomi J, Sharif MA. Design and fabrication of novel polymerized dual nature ionic liquid as highly effective catalyst for regioselective synthesis of monospiro derivatives. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117800] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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20
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Etim UJ, Bai P, Gazit OM, Zhong Z. Low-Temperature Heterogeneous Oxidation Catalysis and Molecular Oxygen Activation. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1919044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ubong J. Etim
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
| | - Peng Bai
- College of Chemical Engineering, China University of Petroleum, Qingdao, China
| | - Oz M. Gazit
- Wolfson Faculty of Chemical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
- Technion Israel Institute of Technology (IIT), Haifa, Israel
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21
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Effects of Y2O3 and transition-metal nitrates on phase, microstructures and PL properties of N-containing Ce2Si2.5Al0.5O3.5N3.5 melilite. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2020.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Atomic Resolution Electron Microscopy: A Key Tool for Understanding the Activity of Nano-Oxides for Biomedical Applications. NANOMATERIALS 2021; 11:nano11082073. [PMID: 34443904 PMCID: PMC8400361 DOI: 10.3390/nano11082073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 01/09/2023]
Abstract
Transition metal oxides constitute one of the most fruitful sources of materials with continuously increasing potential applications prompted by the expectations derived from the reduction of the particle size. The recent advances in transmission electron microscopy, because of the development of lenses, have made it possible to reach atomic resolution, which can provide answers regarding the performance of the transition metal nano-oxides. This critical information is related not only to the ability to study their microstructural characteristics but also their local composition and the oxidation state of the transition metal. Exploring these features is a well-known task in nano-oxides for energy and electronic technologies, but they are not so commonly used for elucidating the activity of these oxides for biomedical applications. Nevertheless, the identification at the atomic level of a certain dopant or the unambiguous determination of the oxidation state of a transition metal in a nano-oxide can be important questions to be answered in a certain biomedical application. In this work, we provide several examples in transition metal nano-oxides to show how atomic-resolution electron microscopy can be a key tool for its understanding.
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23
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Highly efficient, recyclable and alternative method of synthesizing phenols from phenylboronic acids using non-endangered metal: Samarium oxide. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Sonobe K, Tanabe M, Imaoka T, Chun WJ, Yamamoto K. Low-Temperature H 2 Reduction of Copper Oxide Subnanoparticles. Chemistry 2021; 27:8452-8456. [PMID: 33884681 DOI: 10.1002/chem.202100508] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Indexed: 11/08/2022]
Abstract
Subnanoparticles (SNPs) with sizes of approximately 1 nm are attractive for enhancing the catalytic performance of transition metals and their oxides. Such SNPs are of particular interest as redox-active catalysts in selective oxidation reactions. However, the electronic states and oxophilicity of copper oxide SNPs are still a subject of debate in terms of their redox properties during oxidation reactions for hydrocarbons. In this work, in situ X-ray absorption fine structure (XAFS) measurements of Cu28 Ox SNPs, which were prepared by using a dendritic phenylazomethine template, during temperature-programmed reduction (TPR) with H2 achieved lowering of the temperature (T50 =138 °C) reported thus far for the CuII →CuI reduction reaction because of Cu-O bond elongation in the ultrasmall copper oxide particles.
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Affiliation(s)
- Kazutaka Sonobe
- Laboratory for Chemistry and Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Makoto Tanabe
- JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Takane Imaoka
- Laboratory for Chemistry and Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.,JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Wang-Jae Chun
- Graduate School of Arts and Sciences, International Christian University, Mitaka, Tokyo, 181-8585, Japan
| | - Kimihisa Yamamoto
- Laboratory for Chemistry and Life Science, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.,JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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25
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Fulvic acid-embedded poly (vinyl alcohol)–zinc oxide hydrogel nanocomposite: synthesis, characterization, swelling and release kinetic. INTERNATIONAL NANO LETTERS 2021. [DOI: 10.1007/s40089-021-00344-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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26
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Kesavan G, Chen SM. Highly sensitive manganese oxide/hexagonal boron nitride nanocomposite: An efficient electrocatalyst for the detection of anti-cancer drug flutamide. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105906] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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27
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de Sá RG, Arantes TM, de Macedo EF, Dona' LM, Pereira JCF, Hurtado CR, Varghese RJ, Oluwafemi OS, Tada DB. Photoprotective activity of zirconia nanoparticles. Colloids Surf B Biointerfaces 2021; 202:111636. [PMID: 33706163 DOI: 10.1016/j.colsurfb.2021.111636] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/04/2021] [Accepted: 02/15/2021] [Indexed: 11/19/2022]
Abstract
The increasing incidence of diseases caused by the harmful effects of UV radiation in skin, predominantly skin cancer, induce the search for more efficient photoprotector agents. Nowadays, titanium dioxide (TiO2) and zinc oxide (ZnO) are the most widely used photoprotectors and therefore form the main components of commercially available sunscreens. Although the outstanding efficiency in absorbing and scattering UV radiation, mainly as nanoparticles, recent studies have raised concerns regarding the safe use of these nanoparticles, especially due to their high generation of reactive oxygen species (ROS). Thereby, this work focus on the evaluation of the photoprotective activity of zirconia nanoparticles (ZrO2 NPs) and their cytotoxicity study in the presence and absence of UV irradiation. The ZrO2 NPs were synthesized by hydrothermal method and their hydrodynamic diameter, Zeta potential and colloidal stability were characterized by dynamic light scattering. The morphology and size were observed by transmission electron microscopy. The synthesis resulted in ZrO2 NPs with 50 nm of diameter and 56 nm of hydrodynamic diameter. The high colloidal stability was evidenced by the high value of Zeta potential (+48 mV) and low polydispersity index (0.09). The UV-vis spectrum of the ZrO2 NPs in aqueous suspension showed an intense light scattering below 250 and a wide absorption band at 285 nm. The poor generation of ROS by ZrO2 NPs was confirmed by the absence of photodegradation of methylene blue after long periods of irradiation. The in vitro assays performed with HaCaT cell line showed that the cell viability did not decrease in the absence of irradiation. However, after 24 h of incubation, the cell viability decreased under UV-irradiation in comparison with irradiated cells that were not incubated with ZrO2 NPs. Notably, in these assays, the cells were incubated with the ZrO2 NPs and after 24 h, they were replaced by fresh culture medium before the cell viability assay. Nevertheless, another in vitro assay was performed in order to evaluate the photoprotective activity of ZrO2 NPs. The cells were irradiated in the presence of ZrO2 NPs suspension. In this case, cell viability did not decrease even after long period of UV-irradiation and at higher concentration of ZrO2 NPs. The present results showed that ZrO2 NPs could be an interesting material to be used for skin photoprotection since they showed low cytotoxicity, absence of ROS generation and protection under UV irradiation. Additionally, the ZrO2 NPs suspension was transparent as usually required for applications in sunscreens.
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Affiliation(s)
- Renata Guimarães de Sá
- Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil
| | | | - Erenilda Ferreira de Macedo
- Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil
| | - Luísa Molina Dona'
- Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil
| | - Jeniffer C F Pereira
- Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil
| | - Carolina Ramos Hurtado
- Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil
| | - R Jose Varghese
- Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Johannesburg, South Africa; Centre for Nanomaterials Science Research, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Johannesburg, South Africa
| | - Oluwatobi Samuel Oluwafemi
- Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Johannesburg, South Africa; Centre for Nanomaterials Science Research, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, Johannesburg, South Africa
| | - Dayane Batista Tada
- Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil.
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28
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Khalil M, Kadja GT, Ilmi MM. Advanced nanomaterials for catalysis: Current progress in fine chemical synthesis, hydrocarbon processing, and renewable energy. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.09.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Mishra S, Sangma SW, Bal R, Dey RK. Preparation and characterization of a copper oxide nanoparticle-supported red-mud catalyst for liquid phase oxidation of ethyl benzene to acetophenone. NEW J CHEM 2021. [DOI: 10.1039/d1nj00888a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In this study, liquid phase oxidation of ethyl benzene to acetophenone was widely investigated using a new recyclable supported catalyst of CuO nanoparticles impregnated over activated red-mud (CuO_AARM).
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Affiliation(s)
- Subhashree Mishra
- Department of Chemistry
- Central University of Jharkhand (CUJ)
- Ranchi – 835 205
- India
| | - Simon Watre Sangma
- Department of Chemistry
- Central University of Jharkhand (CUJ)
- Ranchi – 835 205
- India
| | - Rajaram Bal
- Catalytic Conversion & Processes Division
- CSIR-Indian Institute of Petroleum (IIP)
- Dehradun – 248005
- India
| | - Ratan Kumar Dey
- Department of Chemistry
- Central University of Jharkhand (CUJ)
- Ranchi – 835 205
- India
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30
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Eggermont SGF, Prato R, Dominguez-Benetton X, Fransaer J. Oxidation-assisted alkaline precipitation of nanoparticles using gas-diffusion electrodes. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00463d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By benchmarking gas-diffusion electrocrystallization against alkaline precipitation for the synthesis of (hydr)oxide nanoparticles, oxidation-assisted precipitation of magnetite nanoparticles was demonstrated.
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Affiliation(s)
| | - Rafael Prato
- Flemish Institute for Technological Research (VITO)
- BE-2400 Mol
- Belgium
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31
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MirMoghtadaei G, Ghosalya MK, Artiglia L, Bokhoven JA, Falamaki C. Strong Promoting Effect of Gold Nanoparticles on the CO Abatement Catalytic Activity of CoO
x
/Clay‐Bonded SiC Catalysts Produced by AA‐MOCVD Method Using Co(acac)
2
as Precursor. ChemistrySelect 2020. [DOI: 10.1002/slct.202003728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Golnoosh MirMoghtadaei
- Chemical Engineering Department Amirkabir University of Technology (Tehran Polytechnic) P.O. Box 15875–4413 Tehran Iran
| | - Manoj K. Ghosalya
- Institute for Chemistry and Bioengineering ETH Zurich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
| | - Luca Artiglia
- Laboratory for Sustainable Chemistry and Catalysis Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland
- Laboratory of Environmental Chemistry Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland
| | - Jeroen A. Bokhoven
- Institute for Chemistry and Bioengineering ETH Zurich Vladimir-Prelog-Weg 1 8093 Zürich Switzerland
- Laboratory for Sustainable Chemistry and Catalysis Paul Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland
| | - Cavus Falamaki
- Chemical Engineering Department Amirkabir University of Technology (Tehran Polytechnic) P.O. Box 15875–4413 Tehran Iran
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32
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Controllable Hydrothermal Synthesis and Photocatalytic Performance of Bi2MoO6 Nano/Microstructures. Catalysts 2020. [DOI: 10.3390/catal10101161] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Bi2MoO6 with a tunable morphology was synthesized by a facile hydrothermal route using different surfactants, including nanosheet-assembled microspheres, smooth microspheres, nanoparticle aggregates and nanoparticles. The morphology, crystal structure and photocatalytic activity of as-obtained Bi2MoO6 were characterized by scanning electron microscopes (SEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and UV–Vis spectrophotometer. Bi2MoO6 flower-like microspheres using cetyl-trimethyl-ammonium bromide (BET) as the surfactant exhibited much better photocatalytic activity than Bi2MoO6 with the other morphologies, with a degradation efficiency of 98.4%. It can be summarized that the photocatalytic activity of Bi2MoO6 samples depends on their morphology and composition.
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33
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Environmentally benign production of cupric oxide nanoparticles and various utilizations of their polymeric hybrids in different technologies. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213378] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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Derina K, Korotkova E, Barek J. Non-enzymatic electrochemical approaches to cholesterol determination. J Pharm Biomed Anal 2020; 191:113538. [PMID: 32919143 DOI: 10.1016/j.jpba.2020.113538] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/02/2020] [Accepted: 08/05/2020] [Indexed: 01/06/2023]
Abstract
Cholesterol plays a vital role in a human body. It is known as one of the most important sterols, because it forms cell walls and participates in signal transduction. Moreover, cholesterol was recognized as biomarker of cardiovascular diseases and of some metabolic disorders. As a result, cholesterol blood levels should be controlled in a variety of diseases such as ischemic heart disease, cerebrovascular ischemia, stroke, hypertension, type II diabetes, and many others. Hence, the accurate cholesterol quantification plays an important role in diagnosis and treatment of these diseases. Modern voltammetric and amperometric methods are increasingly used for cholesterol monitoring. Consequently, the problem of electrode fabrication for cholesterol detection has high importance for clinical tests. Novel electrode materials initiated the fast growth of electrochemical biosensors. Biomaterials are still the most frequently used modifiers for cholesterol sensors due to their high selectivity. However, biomaterials have low stability complicating their practical applications. This fact is crucial for analytical parameters such as limit of detection (LOD) and sensitivity. Therefore, nanomaterials are used to eliminate disadvantages of biomaterials and to improve sensors performance by increasing the electrode surface, conductivity and sensitivity. This review is focused on the use of non-enzymatic electrodes for cholesterol quantification and on different approaches to their fabrication. Firstly, the necessity and role of modifier is discussed. Afterwards, the advantages and disadvantages of currently used modifiers are critically compared together with all aspects and approaches to sensors fabrication. Finally, the prospects of non-enzymatic electrodes application for cholesterol sensors engineering are summarised.
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Affiliation(s)
- Ksenia Derina
- National Research Tomsk Polytechnic University, Division for Chemical Engineering, School of Earth Science and Engineering, Lenin Avenue 30, 634050 Tomsk, Russia
| | - Elena Korotkova
- National Research Tomsk Polytechnic University, Division for Chemical Engineering, School of Earth Science and Engineering, Lenin Avenue 30, 634050 Tomsk, Russia
| | - Jiří Barek
- National Research Tomsk Polytechnic University, Division for Chemical Engineering, School of Earth Science and Engineering, Lenin Avenue 30, 634050 Tomsk, Russia; Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Albertov 6, 128 43 Prague 2, Czech Republic.
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35
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Li J, An Z, Sun J, Tan C, Gao D, Tan Y, Jiang Y. Highly Selective Oxidation of Organic Sulfides by a Conjugated Polymer as the Photosensitizer for Singlet Oxygen Generation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35475-35481. [PMID: 32658457 DOI: 10.1021/acsami.0c10162] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A cationic conjugated polyelectrolyte PPET3-N2 was used as a photosensitizer for photocatalytic oxidation of organic sulfides, including thioanisole, ethyl phenyl sulfide, 4-methylphenyl methyl sulfide, etc., to form sulfoxides with good yields and high selectivity. Oxidation reactions were performed in both batch and microfluidic reactors, where the microfluidic reactor can significantly promote the conversion of photocatalytic oxidation reaction to over 98% in about 8 min. Further studies of the photocatalytic oxidation of the antitumor drug ricobendazole in the microfluidic reactor demonstrate the potential application of the polymer material in organic reactions given its high selectivity, good efficiency, and operation convenience.
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Affiliation(s)
- Jingfeng Li
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Zhaoyi An
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- Open FIESTA, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
| | - Junyang Sun
- Choate Rosemary Hall, Wallingford, Connecticut 06490, United States
| | - Chunyan Tan
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- Open FIESTA, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
| | - Dan Gao
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- Open FIESTA, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
| | - Ying Tan
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- Open FIESTA, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
| | - Yuyang Jiang
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
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36
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Amini M, Hajipour E, Akbari A, Hwa Chae K. Immobilization of copper nanoparticles on WO
3
with enhanced catalytic activity for the synthesis of 1,2,3‐triazoles. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mojtaba Amini
- Department of Chemistry, Faculty of Science University of Maragheh Maragheh Iran
| | - Elham Hajipour
- Department of Chemistry, Faculty of Science University of Maragheh Maragheh Iran
| | - Ali Akbari
- Solid Tumor Research Center, Cellular and Molecular Medicine Institute Urmia University of Medical Sciences Urmia Iran
| | - Keun Hwa Chae
- Advanced Analysis Center Korea Institute of Science and Technology Seoul 136‐791 South Korea
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37
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In situ fabrication of Au–CoFe2O4: an efficient catalyst for soot oxidation. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01502-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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38
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Selective Photocatalytic Oxidation of 5-HMF in Water over Electrochemically Synthesized TiO2 Nanoparticles. Processes (Basel) 2020. [DOI: 10.3390/pr8060647] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
TiO2 nanoparticles were prepared via an electrochemical method using pulse alternating current and applied in the photocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). Its physicochemical properties were characterized by SEM, HRTEM, XRD, and BET methods. The effect of scavenger and UVA light intensity was studied. The results revealed that electrochemically synthesized TiO2 nanoparticles exhibit higher DFF selectivity in the presence of methanol (up to 33%) compared with commercial samples.
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39
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Morphology-Controlled Fabrication of Co3O4 Catalysts and Performance Towards Low Temperature CO Oxidation. Catal Letters 2020. [DOI: 10.1007/s10562-020-03249-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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40
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Development of Nanosized Mn3O4-Co3O4 on Multiwalled Carbon Nanotubes for Cathode Catalyst in Urea Fuel Cell. ENERGIES 2020. [DOI: 10.3390/en13092322] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Double-oxide Mn3O4-Co3O4 nanoparticles were synthesized and anchored on multiwalled carbon nanotubes (MWCNTs) via a single-step solvothermal method. The largest specific area (99.82 m2g−1) of the catalyst was confirmed via a nitrogen adsorption isotherm. Furthermore, the uniform coating of the Mn3O4-Co3O4 nanoparticles on the surface of the MWCNTs was observed via scanning electron microscopy and transmission electron microscopy; the uniform coating provided an effective transport pathway during the electrocatalytic activities. The rotating disk electrode and rotating ring disk electrode measurements indicated that the electron transfer number was 3.96 and the evolution of H2O2 was 2%. In addition, the Mn3O4-Co3O4/MWCNT catalyst did not undergo urea poisoning and remained stable in an alkaline solution. Conversely, commercial Pt/C could not withstand urea poisoning for long. The performance cell achieved a power density of 0.4226 mW cm−2 at 50 °C. Therefore, Mn3O4-Co3O4/MWCNT is an efficient and inexpensive noble-metal-free cathodic catalyst for direct urea fuel cells.
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41
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Polyamide-zinc oxide-based thin film nanocomposite membranes: Towards improved performance for forward osmosis. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114362] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Abstract
Selective oxidation of benzyl alcohol to benzaldehyde was carried out with MoO2 nanoparticles (MoO2 NPs). MoO2 NPs were synthesized by two different approaches and characterized by several techniques. The synthesis was done by a hydrothermal procedure using ethylenediamine and either Fe2O3 or hydroquinone. In the latter case, an additional calcination step under N2 was performed to eliminate passivating agents at the surface of the nanoparticles. The synthesized nanocatalysts showed similar catalytic properties, being efficient catalysts in the oxidation of benzyl alcohol. High substrate conversion and product selectivity were achieved under all tested conditions. Studies were conducted using two different oxidants: tert-butyl hydroperoxide and hydrogen peroxide, in our continuous effort to obtain more efficient catalysts for more sustainable catalytic processes. When H2O2 was used as the oxidant, 94% yield was achieved with 100% selectivity for benzaldehyde, which was a very promising result to undergo other studies with this system. Moreover, to elucidate some aspects of the reaction mechanism, a study was conducted, and it was possible to conclude that the reaction undergoes, to some extent, through a radical mechanism with both oxidants.
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43
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Aguirre NF, Jung J, Yang P. Unraveling the structural stability and the electronic structure of ThO 2 clusters. Phys Chem Chem Phys 2020; 22:18614-18621. [DOI: 10.1039/d0cp00478b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unraveling the correlations between the geometry, the relative energy and the electronic structure of actinide oxide nanostructures is crucial for a better control of their size, shape and properties.
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Affiliation(s)
| | - Julie Jung
- Theoretical Division
- Los Alamos National Laboratory
- Los Alamos
- USA
| | - Ping Yang
- Theoretical Division
- Los Alamos National Laboratory
- Los Alamos
- USA
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44
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Naikwade A, Jagadale M, Kale D, Rashinkar G. Magnetic Nanoparticle Supported Ionic Liquid Phase Catalyst for Oxidation of Alcohols. Aust J Chem 2020. [DOI: 10.1071/ch19627] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new magnetic nanoparticle supported ionic liquid phase (SILP) catalyst containing perruthenate anions was prepared by a multistep procedure. The various analytical techniques such as FT-IR spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, thermogravimetric analysis, energy dispersive X-ray analysis, and vibrating sample magnetometer analysis ascertained the successful formation of catalyst. The performance of a magnetically retrievable SILP catalyst was evaluated in the selective oxidation of alcohols. The split test and leaching studies of the SILP catalyst confirmed its heterogeneous nature. In addition, the reusability potential of SILP catalyst was also investigated which revealed its robust activity up to six consecutive cycles.
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45
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Zhu Y, Wu J, Chen M, Liu X, Xiong Y, Wang Y, Feng T, Kang S, Wang X. Recent advances in the biotoxicity of metal oxide nanoparticles: Impacts on plants, animals and microorganisms. CHEMOSPHERE 2019; 237:124403. [PMID: 31356996 DOI: 10.1016/j.chemosphere.2019.124403] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/14/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
The contact between metal oxide nanoparticles (NPs) and human is more and more close with their wide applications. The inputs of metal oxide NPs to the environment are also growing every year, which causes potential environmental and human health risks. They are toxic to animals, microorganisms and plants at high concentrations, and they show different mechanisms of toxicity to different species. In addition, under complex environmental conditions, their toxic effects are often unpredictable. We have integrated the recent studies on the biotoxicity of metal oxide NPs from 2015-present, and clarified their toxic mechanism, as well as the toxic harm. It lays a foundation for further studying the toxicity and ecological risk of metal oxide NPs.
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Affiliation(s)
- Yi Zhu
- School of Environmental Science & Engineering, Hubei Polytechnic University, Huangshi, 435003, PR China
| | - Jianhua Wu
- School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430080, PR China
| | - Ming Chen
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Xianli Liu
- School of Environmental Science & Engineering, Hubei Polytechnic University, Huangshi, 435003, PR China.
| | - Yijie Xiong
- School of Environmental Science & Engineering, Hubei Polytechnic University, Huangshi, 435003, PR China
| | - Yanyan Wang
- School of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Tao Feng
- School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430080, PR China
| | - Shuang Kang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xianfeng Wang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
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46
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Akbari A, Naderahmadian A, Eftekhari-Sis B. Silver and copper nanoparticles stabilized on ionic liquids-functionalized polyhedral oligomeric silsesquioxane (POSS): Highly active and recyclable hybrid catalysts. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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47
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Sharma S, Sudarshan K, Sen D, Pujari P. Microenvironment of mesopores of MCM-41 supported CuO catalyst: An investigation using positronium probe. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.03.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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48
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Mahmoud HR, El-Molla SA, Naghmash MA. Novel mesoporous MnO 2/SnO 2 nanomaterials synthesized by ultrasonic-assisted co-precipitation method and their application in the catalytic decomposition of hydrogen peroxide. ULTRASONICS 2019; 95:95-103. [PMID: 30903814 DOI: 10.1016/j.ultras.2019.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 02/13/2019] [Accepted: 03/13/2019] [Indexed: 06/09/2023]
Abstract
Novel mesoporous MnO2/SnO2 catalysts were successfully synthesized via traditional and ultrasonic co-precipitation methods. Moreover, their catalytic efficiencies were evaluated in decomposition of hydrogen peroxide (H2O2). Interestingly, it was found that the mixing of MnO2 with SnO2 catalyst led to a significant improvement in their catalytic efficiencies compared with single oxides catalysts. However, the influence of ultrasonic power and irradiation time on MnO2/SnO2 nanomaterials were compared to get optimum synthetic condition. Subsequently, the catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption analysis and high-resolution transmission electron microscopy (HR-TEM). Results represented that the effect of ultrasonic power and irradiation time on MnO2/SnO2 catalysts exerted a great influence on the BET surface area and average particle diameter. Furthermore, the results showed that the best catalytic efficiency was obtained for the mesoporous MnO2/SnO2 catalyst which is sonicated at power of 60% for 30 min as optimum conditions. Finally, the outcomes appeared that the catalysts synthesized by ultrasonic co-precipitation method were more efficient than those synthesized by traditional co-precipitation in catalyzing H2O2 decomposition.
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Affiliation(s)
- Hala R Mahmoud
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt.
| | - Sahar A El-Molla
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt
| | - Mona A Naghmash
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt
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49
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Removal of Evans Blue dye from aqueous solution using magnetic spinel ZnFe2O4 nanomaterial: Adsorption isotherms and kinetics. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.nanoso.2019.100290] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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50
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Ni-bearing nanoporous alumina loaded ultralow-concentrated Pd as robust dual catalyst toward hydrogenation and oxidation reactions. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.nanoso.2019.100287] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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