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Batool SS, Saleem R, Khan RRM, Saeed Z, Pervaiz M, Summer M. Enhancing photocatalytic performance of zirconia-based nanoparticles: A comprehensive review of factors, doping strategies, and mechanisms. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 2024; 178:108419. [DOI: 10.1016/j.mssp.2024.108419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
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2
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Yulizar Y, Abdullah I, Surya RM, Alifa NL. Green synthesis of novel YMnO 3-doped TiO 2 for enhanced visible-light- driven photocatalytic degradation of malachite green. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 342:118139. [PMID: 37285771 DOI: 10.1016/j.jenvman.2023.118139] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 05/03/2023] [Accepted: 05/08/2023] [Indexed: 06/09/2023]
Abstract
Recently, new methods of utilizing chemistry materials to overcome environmental issues worldwide, for instance, water purification have widely evolved since it is well-aligned with the sustainable development goals 6: clean water and sanitation. These issues have become a vital research topic for researchers in the last decade, particularly, the use of green photocatalyst due to the limitation of renewable resources. Herein, we report the modification of titanium dioxide with yttrium manganite (TiO2/YMnO3) by a novel high-speed stirring technique in n-hexane-water utilizing Annona muricata L. leaf extracts (AMLE). The YMnO3 incorporation in the presence of TiO2 was introduced to accelerate the photocatalytic performance for the degradation of malachite green in aqueous media. TiO2 modification with YMnO3 presented a drastic decline of bandgap energy from 3.34 to 2.38 eV and the highest rate constant (kapp) of 2.275 × 10-2 min-1. Surprisingly, TiO2/YMnO3 exhibited an extraordinary photodegradation efficiency of 95.34%, which was 1.9-fold higher than that of TiO2 under visible light illumination. The enhanced photocatalytic activity is ascribed to the formation of a TiO2/YMnO3 heterojunction, narrower optical band gap, excellent charge carrier separation. H+ and .O2- were the major scavenger species that play a significant role in the photodegradation of malachite green. Additionally, TiO2/YMnO3 shows outstanding stability over five cycles of photocatalytic reaction without significant loss of its effectiveness. This work presents a recent understanding of the green construction of a novel TiO2-based YMnO3 photocatalyst with excellent efficiency in the visible region for environmental technology application in water purification specifically in degrading organic dyes.
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Affiliation(s)
- Yoki Yulizar
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia.
| | - Iman Abdullah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia
| | - Rizki Marcony Surya
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia
| | - Naya Luvy Alifa
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia
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Kanth Kadiyala N, Mandal BK, Kumar Reddy LV, Barnes CHW, De Los Santos Valladares L, Sen D. Efficient One-Pot Solvothermal Synthesis and Characterization of Zirconia Nanoparticle-Decorated Reduced Graphene Oxide Nanocomposites: Evaluation of Their Enhanced Anticancer Activity toward Human Cancer Cell Lines. ACS OMEGA 2023; 8:2406-2420. [PMID: 36687032 PMCID: PMC9850483 DOI: 10.1021/acsomega.2c06822] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
This study mainly deals with an effective one-pot solvothermal synthetic pathway for the preparation of uniformly dispersed zirconium oxide nanoparticles on the flattened rough surface of reduced graphene oxide (ZrO2/rGO NCs) using the aqueous leaf extract of Andrographis paniculata. After obtaining detailed information on the preparation and characterization, the anticancer activity of the synthesized ZrO2/rGO nanocrystals (NCs) was evaluated on two human cancer cell lines (A549 and HCT116) along with one normal human cell line (hMSC). The 3-[4,5-dimethylthiazole-2-yl]-2,5-diphenyltetrazolium bromide assays revealed that ZrO2/rGO NCs exhibited a dose-dependent cytotoxicity pattern. The cell viability (%) drastically decreases up to 96-98% after exposure to an optimal concentration of 10 ppm nanocomposites. Analysis of both the reactive oxygen species generation and the Annexin V-FTIC staining assays reveal that ZrO2/rGO NCs have the ability to induce apoptosis in A549 and HCT116 cell lines. Thus, the green synthesis of ZrO2/rGO NCs shows potential in developing efficient therapeutic agents for cancer therapy.
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Affiliation(s)
- Nalinee Kanth Kadiyala
- Trace
Elements Speciation Research Laboratory, Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology (VIT), Vellore 632014, India
| | - Badal Kumar Mandal
- Trace
Elements Speciation Research Laboratory, Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology (VIT), Vellore 632014, India
| | - L. Vinod Kumar Reddy
- Cellular
and Molecular Therapeutics Laboratory, Centre for Biomaterials, Cellular
and Molecular Theranostics, Vellore Institute
of Technology (VIT), Vellore 632014, India
| | - Crispin H. W. Barnes
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
| | - Luis De Los Santos Valladares
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
- Faculty
of Physics and Technology, L.N. Gumilyov
Euroasian National University, Nur-Sultan 010000, Kazakhstan
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima 14-0149, Peru
| | - Dwaipayan Sen
- Cellular
and Molecular Therapeutics Laboratory, Centre for Biomaterials, Cellular
and Molecular Theranostics, Vellore Institute
of Technology (VIT), Vellore 632014, India
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Negrescu AM, Killian MS, Raghu SNV, Schmuki P, Mazare A, Cimpean A. Metal Oxide Nanoparticles: Review of Synthesis, Characterization and Biological Effects. J Funct Biomater 2022; 13:jfb13040274. [PMID: 36547533 PMCID: PMC9780975 DOI: 10.3390/jfb13040274] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/22/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022] Open
Abstract
In the last few years, the progress made in the field of nanotechnology has allowed researchers to develop and synthesize nanosized materials with unique physicochemical characteristics, suitable for various biomedical applications. Amongst these nanomaterials, metal oxide nanoparticles (MONPs) have gained increasing interest due to their excellent properties, which to a great extent differ from their bulk counterpart. However, despite such positive advantages, a substantial body of literature reports on their cytotoxic effects, which are directly correlated to the nanoparticles' physicochemical properties, therefore, better control over the synthetic parameters will not only lead to favorable surface characteristics but may also increase biocompatibility and consequently lower cytotoxicity. Taking into consideration the enormous biomedical potential of MONPs, the present review will discuss the most recent developments in this field referring mainly to synthesis methods, physical and chemical characterization and biological effects, including the pro-regenerative and antitumor potentials as well as antibacterial activity. Moreover, the last section of the review will tackle the pressing issue of the toxic effects of MONPs on various tissues/organs and cell lines.
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Affiliation(s)
- Andreea Mariana Negrescu
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania
| | - Manuela S. Killian
- Department of Chemistry and Biology, Chemistry and Structure of Novel Materials, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Swathi N. V. Raghu
- Department of Chemistry and Biology, Chemistry and Structure of Novel Materials, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Patrik Schmuki
- Department of Materials Science WW4-LKO, Friedrich-Alexander University, 91058 Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Palacky University, Listopadu 50A, 772 07 Olomouc, Czech Republic
- Chemistry Department, King Abdulaziz University, Jeddah 80203, Saudi Arabia
| | - Anca Mazare
- Department of Materials Science WW4-LKO, Friedrich-Alexander University, 91058 Erlangen, Germany
- Advanced Institute for Materials Research (AIMR), National University Corporation Tohoku University (TU), Sendai 980-8577, Japan
- Correspondence:
| | - Anisoara Cimpean
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania
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Kumari N, Aulakh MK, Anand V, Sareen S, Verma M, Sharma A, Kataria R, Mutreja V. Visible-Light Driven Degradation of Tetracycline Hydrochloride Using Zirconia Nanoparticles as Photocatalysts. Top Catal 2022. [DOI: 10.1007/s11244-022-01735-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Vinayagam R, Singhania B, Murugesan G, Kumar PS, Bhole R, Narasimhan MK, Varadavenkatesan T, Selvaraj R. Photocatalytic degradation of methylene blue dye using newly synthesized zirconia nanoparticles. ENVIRONMENTAL RESEARCH 2022; 214:113785. [PMID: 35793722 DOI: 10.1016/j.envres.2022.113785] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/23/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Zirconium oxide nanoparticles (ZrO2NPs) were prepared using the leaf extract of Muntingia calabura as a reductant. The absorption peak at 232 nm confirmed the signature peak for ZrO2NPs with band energy at 5.07 eV. The ZrO2NPs were tetragonal and highly crystalline, possessing a mean diameter of 14.83 nm as confirmed by XRD studies. The lattice constants (a = 0.362 nm and c = 0.511 nm) were consistent with the literature. Spherical nanoaggregates (29.25 nm) were seen in FESEM image and the specific signals for Zr and O were noticed in EDS image. The tetragonal phase of the ZrO2NPs were further confirmed from the XPS and Raman studies. PL spectrum had a sharp emission at 493 nm. The FTIR spectrum revealed the presence of various functional groups. ZrO2NPs were thermally stable with 5.76% total weight loss - as revealed from TGA profile. The photocatalytic breakdown of methylene blue (MB) dye under the influence of solar irradiation was performed using ZrO2NPs which exhibited 89.11% degradation within 5 h. Hence, the synthesized ZrO2NPs can be used as an alternate potential photocatalyst for the degradation of various dyes present in waste streams.
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Affiliation(s)
- Ramesh Vinayagam
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Bhawesh Singhania
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Gokulakrishnan Murugesan
- Department of Biotechnology, M.S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110, India; Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, 140413, India
| | - Ruchi Bhole
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Manoj Kumar Narasimhan
- Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Potheri, Kattankulathur, 603203, Chengalpattu District, Tamil Nadu, India
| | - Thivaharan Varadavenkatesan
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Raja Selvaraj
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
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Kumari N, Sareen S, Verma M, Sharma S, Sharma A, Sohal HS, Mehta SK, Park J, Mutreja V. Zirconia-based nanomaterials: recent developments in synthesis and applications. NANOSCALE ADVANCES 2022; 4:4210-4236. [PMID: 36321156 PMCID: PMC9552756 DOI: 10.1039/d2na00367h] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 08/19/2022] [Indexed: 05/30/2023]
Abstract
In the last decade, the whole scientific community has witnessed great advances and progress in the various fields of nanoscience. Among the different nanomaterials, zirconia nanomaterials have found numerous applications as nanocatalysts, nanosensors, adsorbents, etc. Additionally, their exceptional biomedical applications in dentistry and drug delivery, and interesting biological properties, viz. anti-microbial, antioxidant, and anti-cancer activity, have further motivated the researchers to explore their physico-chemical properties using different synthetic pathways. With such an interest in zirconia-based nanomaterials, the present review focuses systematically on different synthesis approaches and their impact on the structure, size, shape, and morphology of these nanomaterials. Broadly, there are two approaches, viz., chemical synthesis which includes hydrothermal, solvothermal, sol-gel, microwave, solution combustion, and co-precipitation methods, and a greener approach which employs bacteria, fungus, and plant parts for the preparation of zirconia nanoparticles. In this review article, the aforementioned methods have been critically analyzed for obtaining specific phases and shapes. The review also incorporates a detailed survey of the applications of zirconia-based nanomaterials. Furthermore, the influence of specific phases, morphology, and the comparison with their counterpart composites for different applications have also been included. Finally, the concluding remarks, prospects and possible scope are given in the last section.
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Affiliation(s)
- Nisha Kumari
- Department of Chemistry, University Institute of Science, Chandigarh University Mohali Punjab-140 413 India
| | - Shweta Sareen
- Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh-160 014 India
| | - Meenakshi Verma
- Department of Chemistry, University Institute of Science, Chandigarh University Mohali Punjab-140 413 India
- Department of UCRD, Chandigarh University Gharuan Mohali Punjab-140 413 India
| | - Shelja Sharma
- Department of Chemistry, University Institute of Science, Chandigarh University Mohali Punjab-140 413 India
| | - Ajay Sharma
- Department of Chemistry, University Institute of Science, Chandigarh University Mohali Punjab-140 413 India
- Department of UCRD, Chandigarh University Gharuan Mohali Punjab-140 413 India
| | - Harvinder Singh Sohal
- Department of Chemistry, University Institute of Science, Chandigarh University Mohali Punjab-140 413 India
| | - S K Mehta
- Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University Chandigarh-160 014 India
| | - Jeongwon Park
- Department of Electrical and Biomedical Engineering, University of Nevada Reno NV 89557 USA
| | - Vishal Mutreja
- Department of Chemistry, University Institute of Science, Chandigarh University Mohali Punjab-140 413 India
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8
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Hussain T, Akhter N, Nadeem R, Rashid U, Noreen S, Anjum S, Ullah S, Hussain HR, Ashfaq A, Perveen S, A. Alharthi F, Kazerooni EA. Biogenic synthesis of date stones biochar-based zirconium oxide nanocomposite for the removal of hexavalent chromium from aqueous solution. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02599-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Photocatalytic degradation of malachite green and antibacterial potential of biomimetic-synthesized zirconium oxide nanoparticles using Annona reticulata leaf extract. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-021-02148-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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10
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Tran TV, Nguyen DTC, Kumar PS, Din ATM, Jalil AA, Vo DVN. Green synthesis of ZrO 2 nanoparticles and nanocomposites for biomedical and environmental applications: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2022; 20:1309-1331. [PMID: 35035338 PMCID: PMC8741578 DOI: 10.1007/s10311-021-01367-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 11/30/2021] [Indexed: 05/05/2023]
Abstract
Pollution and diseases such as the coronavirus pandemic (COVID-19) are major issues that may be solved partly by nanotechnology. Here we review the synthesis of ZrO2 nanoparticles and their nanocomposites using compounds from bacteria, fungi, microalgae, and plants. For instance, bacteria, microalgae, and fungi secret bioactive metabolites such as fucoidans, digestive enzymes, and proteins, while plant tissues are rich in reducing sugars, polyphenols, flavonoids, saponins, and amino acids. These compounds allow reducing, capping, chelating, and stabilizing during the transformation of Zr4+ into ZrO2 nanoparticles. Green ZrO2 nanoparticles display unique properties such as a nanoscale size of 5-50 nm, diverse morphologies, e.g. nanospheres, nanorods and nanochains, and wide bandgap energy of 3.7-5.5 eV. Their high stability and biocompatibility are suitable biomedical and environmental applications, such as pathogen and cancer inactivation, and pollutant removal. Emerging applications of green ZrO2-based nanocomposites include water treatment, catalytic reduction, nanoelectronic devices, and anti-biofilms.
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Affiliation(s)
- Thuan Van Tran
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414 Vietnam
| | - Duyen Thi Cam Nguyen
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414 Vietnam
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310 Johor, Malaysia
| | - Ponnusamy Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603110 India
| | - Azam Taufik Mohd Din
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
| | - Aishah Abdul Jalil
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310 Johor, Malaysia
- Centre of Hydrogen Energy, Institute of Future Energy, UTM Johor Bahru, 81310 Johor, Malaysia
| | - Dai-Viet N. Vo
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414 Vietnam
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia
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Raju L, Lipin R, Eswaran R. Identification, ADMET evaluation and molecular docking analysis of Phytosterols from Banaba ( Lagerstroemia speciosa ( L.) Pers) seed extract against breast cancer. In Silico Pharmacol 2021; 9:43. [PMID: 34367875 PMCID: PMC8289922 DOI: 10.1007/s40203-021-00104-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 07/10/2021] [Indexed: 01/22/2023] Open
Abstract
Lagerstroemia speciosa (L.) Pers., (Lythraceae), commonly called Banaba, is a native plant of Southeast Asia and is widely used in the treatment of diabetics, obesity, kidney diseases, and other inflammatory disorders. L. speciosa consists of several phytoconstituents like glycosides, flavones, corosolic acid, ellagic acids, triterpenes, tannins, which are reported to be present in leaves, stem, flowers, fruit, bark, and roots. This paper presents an investigation on the binding interaction of phytosterols derivatives identified from the ethanolic extract of Lagerstroemia speciosa seeds against breast cancer target protein. The ethanolic extracts Lagerstroemia speciosa seeds were analyzed via GC-MS for the identification of their chemical constituent. In silico methods are adopted to predict ADME parameters, pharmacokinetic properties, drug-likeliness, and acute toxicity of the identified phytosterols molecules. Molecular docking analysis of the phytosterols was performed against three breast cancer targets. A total of 29 compounds were identified from the extract by GC-MS analysis, among which four phytosterols derivatives namely cholesterol margarate, 7-dehydrodiosgenin, Stigmastan-3,5-diene, and γ-sitosterol have been considered for the present study. These phytosterols are identified as non-toxic, non-carcinogenic, and non-mutagenic. Molecular docking studies reveal the extent of molecular interaction with breast cancer targets. The outcomes of the investigation suggest that the phytosterols obtained from the ethanolic seed extract of Lagerstroemia speciosa could act as a promising candidate against breast cancer.
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Affiliation(s)
- Liju Raju
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai, India
| | - Raju Lipin
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai, India
| | - Rajkumar Eswaran
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai, India
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da Silva AFV, Fagundes AP, Macuvele DLP, de Carvalho EFU, Durazzo M, Padoin N, Soares C, Riella HG. Green synthesis of zirconia nanoparticles based on Euclea natalensis plant extract: Optimization of reaction conditions and evaluation of adsorptive properties. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123915] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Phyto-Nanocatalysts: Green Synthesis, Characterization, and Applications. Molecules 2019; 24:molecules24193418. [PMID: 31547052 PMCID: PMC6804184 DOI: 10.3390/molecules24193418] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/14/2019] [Accepted: 09/18/2019] [Indexed: 01/14/2023] Open
Abstract
Catalysis represents the cornerstone of chemistry, since catalytic processes are ubiquitous in almost all chemical processes developed for obtaining consumer goods. Nanocatalysis represents nowadays an innovative approach to obtain better properties for the catalysts: stable activity, good selectivity, easy to recover, and the possibility to be reused. Over the last few years, for the obtaining of new catalysts, classical methods—based on potential hazardous reagents—have been replaced with new methods emerged by replacing those reagents with plant extracts obtained in different conditions. Due to being diversified in morphology and chemical composition, these materials have different properties and applications, representing a promising area of research. In this context, the present review focuses on the metallic nanocatalysts’ importance, different methods of synthesis with emphasis to the natural compounds used as support, characterization techniques, parameters involved in tailoring the composition, size and shape of nanoparticles and applications in catalysis. This review presents some examples of green nanocatalysts, grouped considering their nature (mono- and bi-metallic nanoparticles, metallic oxides, sulfides, chlorides, and other complex catalysts).
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14
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Sai Saraswathi V, Rajaguru P, Santhakumar K. Solar catalysed activity against methyl orange dye, cytotoxicity activity of MCF-7 cell lines and identification of marker compound by HPTLC of Lagerstroemia speciosa. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 170:263-270. [PMID: 28460300 DOI: 10.1016/j.jphotobiol.2017.04.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/08/2017] [Accepted: 04/12/2017] [Indexed: 10/19/2022]
Abstract
The investigation was aimed to quantify the Gallic acid present in Lagerstroemia speciosa leaves (Lythraceae). The High-Performance Thin Layer Chromatography (HPTLC) quantification was performed for acetone (AE), methanolic (ME) and chloroform (CE) extract of leaves of L. speciosa. The pre-coated silica gel 60 F254 was used for complete separation of compounds using the mobile phase pet. Ether: ethyl acetate: formic acid (5:5:1v/v).The validation of the extracts was carried out using ICH guidelines for precision, repeatability and accuracy showing the Rf 0.49 against standard Gallic acid. Linearity range for Gallic acid was done from 200 to 1000ng/spot (AE) and200 ng to 600ng/spot (ME), with Correlation, coefficient r=0.99 (AE) and 0.54 (ME) in the said concentrations. The composition in crude leaf extract was determined to be of 49.712mg (AE) and 20.125mg (ME), while it was not found in chloroform extract against standard Gallic acid. Hence the proposed method was very simple, precise, accurate and easy for the screening of the bioactive compounds present in the acetone and methanolic extracts of the leaves of L. speciosa. It was observed that the acetone extract subjected to cytotoxicity showed promising activity at higher concentrations (100 and 200μg/ml) showed 92.9% and 87.13% inhibition against MCF-7 cell lines respectively. The photocatalytic activity of the acetone and methanolic extracts of methyl orange was found to be 90.25% (190min) and 89.03% (180min) respectively. Therefore this can be used as an indicator of purity of herbal drugs and formulation containing L. speciosa.
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Affiliation(s)
- V Sai Saraswathi
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, India.
| | - P Rajaguru
- Department of Biotechnology, Anna University-BITS Campus, Trichy, India
| | - K Santhakumar
- CO(2) Research and Green Technologies Centre, VIT University, Vellore 632014, Tamil Nadu, India
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15
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Biofilm inhibition formation of clinical strains of Pseudomonas aeruginosa mutans, photocatalytic activity of azo dye and GC-MS analysis of leaves of Lagerstroemia speciosa. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 169:148-160. [PMID: 28319869 DOI: 10.1016/j.jphotobiol.2017.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 03/08/2017] [Indexed: 01/02/2023]
Abstract
The investigation was conducted to analyse the bioactive compounds from the leaf extracts of L. speciosa by GC-MS. The extracts were screened for antibacterial and antibiofilm activities against potential clinical strains. The bioactive compounds from the leaves of L. speciosa were extracted by soxhlet continuous extraction method and their chemical composition was analysed by Gas Chromatography-Mass Spectroscopy (GC-MS). The antibacterial activity was evaluated against clinical strain like Staphylococcus aureus, Escherichia coli, P. aeruginosa and Salmonella typhi by well diffusion technique. We also screened for antibacterial property against common food borne pathogens namely Listeria monocytogenes and Bacillus cereus at varied concentration 250μml-1 to 1000μml-1. Thereafter antibiofilm assay was carried out at from 250 to 1000μg/ml against P. aeruginosa (high biofilm forming pathogen) clinical strain by cover slip technique and the morphology of the pathogen was observed using Scanning Electron Microscopy-(SEM). It was observed that diverse class of secondary metabolites were found by GC-MS analysis for all the extracts upon the continuous extraction. It was found that only minimum inhibition was seen in alcoholic extract for antibacterial activity, whereas all other extracts showed negligible activity. P. aeruginosa biofilm inhibited to 93.0±2% and 91±2% at higher concentration (1000μg/ml) for methanolic and ethanolic extract respectively. Absence of extracellular matrix structure and the surface cracking of biofilm were viewed by SEM, which confirmed the antibiofilm activity. Hence this study reveals that L. speciosa showed significant antibiofilm activity against P. aeruginosa due to the phytoconstituents present in the leaf extracts which was well documented in the alcoholic extracts by GC-MS analysis. The methanolic and ethanolic extract showed good photocatalytic activity of 77.44% and 96.66% against azo dye degradation respectively. Further, isolating the novel phyto-compounds would yield better promising biological activities.
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