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Parimi DS, Jyothirmai MV, Ravva MK, Jaiswal AK, Suresh AK. Bioengineering of Cu 2O structured macro- biotemplate for the ultra-efficient and selective hand-retrieval of glyphosate from agro-farms. Sci Total Environ 2024; 921:171051. [PMID: 38382616 DOI: 10.1016/j.scitotenv.2024.171051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/06/2024] [Accepted: 02/14/2024] [Indexed: 02/23/2024]
Abstract
Glyphosate (Gly) is a massively utilized toxic herbicide exceeding its statutory restrictions, causing adverse environmental and health impacts. Engineered nanomaterials, even though are integral to remediate Gly, their practical use is limited due to time and energy driven purifications, and negative environmental impacts. Here, a 3D wide area (~1.6 ± 0.4 cm2) Cu2O nanoparticle supported biotemplate is designed using fish-scale wastes as a sustainable approach for the ultra-efficient and selective hand-remediation of Gly from real-time samples from agro-farms. While the innate metal binding and reducing ability of collagenous scales aided self-synthesis cum grafting of Cu2O, the selective binding potential of Cu2O to Gly facilitated its hand-retrieval; as assessed using optical characterizations, Fourier transform infrared spectroscopy, thermogravimetric analysis and liquid chromatography mass spectrometry. Optimization studies revealed extractions of diverse pay-loads of Gly between 0.1 μg/mL to 40 μg/mL per 80 mg biotemplate grafted with ~6.354 μg of sub-5 nm Cu2O and was exponential to the number of Cu2O@biotemplates. Even though pH and surfactant didn't have any impact on the adsorption of Gly to the Cu2O@biotemplates, increase in the ionic strength led to a drastic increase in the adsorption. Density function theory simulations unveiled the involvement of phosphonic and carboxylic groups of Gly for interaction with Cu2O with a bond length of 1.826 Å and 1.833 Å, respectively. Overall, our sustainably generated, cost-efficient, hand-retrievable Cu2O supported biotemplate can be generalized to extract diverse organophosphorus toxins from agro-farms and other sewage embodiments. SYNOPSIS: Glyphosate is an excessively applied herbicide with potent health hazards and carcinogenicity. Thus, a hand removable Cu2O-supported biotemplate to selectively and efficiently remediate glyphosate from irrigation water is developed.
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Affiliation(s)
- Divya S Parimi
- Bionanotechnology and Sustainable Laboratory, Department of Biological Sciences, School of Engineering and Applied Sciences, SRM University-AP, Amaravati 522503, India
| | - M V Jyothirmai
- Department of Chemistry, School of Engineering and Applied Sciences, SRM University-AP, Amaravati 522503, India
| | - Mahesh Kumar Ravva
- Department of Chemistry, School of Engineering and Applied Sciences, SRM University-AP, Amaravati 522503, India
| | - Amit K Jaiswal
- Environmental Sustainability and Health Institute, Technological University Dublin, City Campus, Grangegorman, D07 H6K8 Dublin, Ireland
| | - Anil K Suresh
- Bionanotechnology and Sustainable Laboratory, Department of Biological Sciences, School of Engineering and Applied Sciences, SRM University-AP, Amaravati 522503, India.
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Reena VN, Bhagyasree GS, Shilpa T, Aswati Nair R, Misha H, Nithyaja B. Photocatalytic, Antibacterial, Cytotoxic and Bioimaging Applications of Fluorescent CdS Nanoparticles Prepared in DNA Biotemplate. J Fluoresc 2024; 34:437-448. [PMID: 37284964 DOI: 10.1007/s10895-023-03292-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 05/29/2023] [Indexed: 06/08/2023]
Abstract
Synthesizing nanoparticles in biotemplates has been cited as one of the most promising way to obtain monodispersed inorganic nanoparticles. In this method, uniform voids in porous materials serve as hosts to confine the synthesized nanoparticles. DNA template can be described as a smart glue for assembling nanoscale building blocks. Here we investigate the photocatalytic, antibacterial, cytotoxic, and bioimaging applications of DNA capped CdS. XRD, SEM, TEM, UV-visible absorption, and photoluminescence spectra were used to study structural, morphological, and optical properties of CdS nanoparticles. Prepared CdS nanoparticles exhibit visible fluorescence. The photocatalytic activity of CdS towards Rhodamine 6G and Methylene blue are 64% and 91% respectively. A disc-diffusion method is used to demonstrate antibacterial screening. It was shown that CdS nanoparticles inhibit Gram-positive bacteria and Gram-negative bacteria effectively. DNA capped CdS shows higher activity than uncapped CdS nanoparticles. MTT cell viability assays were carried out in HeLa cells to investigate the cytotoxicity for 24 h. At a concentration 2.5 µg/ml, it shows 84% cell viability and 43% viability at 12.5 µg/ml. The calculated LC50 value is equal to 8 µg/ml. These DNA capped CdS nanoparticles were taken for an in-vitro experiment with HeLa cells to exhibit the possibility of bioimaging applications. The present study suggests that the synthesized CdS nanoparticles could be a potential photocatalyst, antibacterial agent, and biocompatible nanoparticle for bioimaging applications.
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Affiliation(s)
- V N Reena
- Photonic Materials Research Laboratory, Department of Physics, Government College Madappally, Vadakara, Kozhikode, 673102, Kerala, India.
- University of Calicut, Malappuram, 673635, Kerala, India.
| | - G S Bhagyasree
- Photonic Materials Research Laboratory, Department of Physics, Government College Madappally, Vadakara, Kozhikode, 673102, Kerala, India
- University of Calicut, Malappuram, 673635, Kerala, India
| | - T Shilpa
- Department of Biochemistry and Molecular Biology, Central University of Kerala, Kasaragod, 671316, Kerala, India
| | - R Aswati Nair
- Department of Biochemistry and Molecular Biology, Central University of Kerala, Kasaragod, 671316, Kerala, India
| | - H Misha
- Department of Physics, Baselius College, Kottayam, 686001, India
- Mahatma Gandhi University, Kottayam, 686560, India
| | - B Nithyaja
- Photonic Materials Research Laboratory, Department of Physics, Government College Madappally, Vadakara, Kozhikode, 673102, Kerala, India
- University of Calicut, Malappuram, 673635, Kerala, India
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3
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Roostaei T, Rahimpour MR, Zhao H, Eisapour M, Chen Z, Hu J. Recent advances and progress in biotemplate catalysts for electrochemical energy storage and conversion. Adv Colloid Interface Sci 2023; 318:102958. [PMID: 37453344 DOI: 10.1016/j.cis.2023.102958] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/05/2023] [Accepted: 06/30/2023] [Indexed: 07/18/2023]
Abstract
Complex structures and morphologies in nature endow materials with unexpected properties and extraordinary functions. Biotemplating is an emerging strategy for replicating nature structures to obtain materials with unique morphologies and improved properties. Recently, efforts have been made to use bio-inspired species as a template for producing morphology-controllable catalysts. Fundamental information, along with recent advances in biotemplate metal-based catalysts are presented in this review through discussions of various structures and biotemplates employed for catalyst preparation. This review also outlines the recent progress on preparation routes of biotemplate catalysts and discusses how the properties and structures of these templates play a crucial role in the final performance of metal-based catalysts. Additionally, the application of bio-based metal and metal oxide catalysts is highlighted for various key energy and environmental technologies, including photocatalysis, fuel cells, and lithium batteries. Biotemplate metal-based catalysts display high efficiency in several energy and environmental systems. Note that this review provides guidance for further research in this direction.
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Affiliation(s)
- Tayebeh Roostaei
- Department of Chemical Engineering, Shiraz University, Shiraz, Iran; Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N1N4, Canada
| | | | - Heng Zhao
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N1N4, Canada
| | - Mehdi Eisapour
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N1N4, Canada
| | - Zhangxin Chen
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N1N4, Canada; Eastern Institute for Advanced Study, Ningbo, Zhengjiang 315200, China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N1N4, Canada.
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Shah SN, Saunders K, Thuenemann EC, Evans DJ, Lomonossoff GP. Designer-length palladium nanowires can be templated by the central channel of tobacco mosaic virus nanorods. Virology 2022; 577:155-162. [PMID: 36384077 DOI: 10.1016/j.virol.2022.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 11/09/2022]
Abstract
We have developed methods for the templated synthesis of palladium nanowires (Pd NWs) within the central channel of tobacco mosaic virus (TMV) nanorods of various lengths. We show that uniform 4 nm diameter Pd NWs can be produced by selective growth within these channels by including the capping reagent, poly(vinyl-pyrrolidone) (PVP30K) and reducing the metal precursor to metallic palladium with ascorbic acid. The length of the Pd NWs can be controlled either by varying the length of the nanorod templates and/or through alterations to the reaction conditions. We have also demonstrated bimetallic gold (Au)-palladium (Pd) in-situ metallization of TMV nanorods resulting in the production of Pd NWs 6 nm gold nanoparticles attached to their ends. The materials produced have many potential applications in the construction of nanoscale devices.
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Affiliation(s)
- Sachin N Shah
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK; Department of Chemistry, University of Hull, Hull, HU6 7RX, UK
| | - Keith Saunders
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK
| | - Eva C Thuenemann
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK
| | - David J Evans
- Department of Chemistry, University of Hull, Hull, HU6 7RX, UK
| | - George P Lomonossoff
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.
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Li H, Li J, Yang P, Ng DHL, Cui X, Ji F. Three-dimensional biogenic C-doped Bi 2MoO 6/In 2O 3-ZnO Z-scheme heterojunctions derived from a layered precursor. J Environ Sci (China) 2019; 79:54-66. [PMID: 30784464 DOI: 10.1016/j.jes.2018.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 06/09/2023]
Abstract
Novel 3D biogenic C-doped Bi2MoO6/In2O3-ZnO Z-scheme heterojunctions were synthesized for the first time, using cotton fiber as template. The as-prepared samples showed excellent adsorption and photodegradation performance toward the hazardous antibiotic doxycycline under simulated sunlight irradiation. The morphology, phase composition and in situ carbon doping could be precisely controlled by adjusting processing parameters. The carbon doping in Bi2MoO6/In2O3-ZnO was derived from the cotton template, and the carbon content could be varied in the range 0.9-4.4 wt.% via controlling the heat treatment temperature. The sample with Bi2MoO6/In2O3-ZnO molar ratio of 1:2 and carbon content of 1.1 wt.% exhibited the highest photocatalytic activity toward doxycycline degradation, which was 3.6 and 4.3 times higher than those of pure Bi2MoO6 and ZnInAl-CLDH (calcined layered double hydroxides), respectively. It is believed that the Z-scheme heterojunction with C-doping, the 3D hierarchically micro-meso-macro porous structure, as well as the high adsorption capacity, contributed significantly to the enhanced photocatalytic activity.
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Affiliation(s)
- Hongyan Li
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Jia Li
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China.
| | - Ping Yang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Dickon H L Ng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Xinling Cui
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
| | - Fei Ji
- School of Material Science and Engineering, University of Jinan, Jinan 250022, China
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Abstract
RNA-guided self-assembly of tobacco mosaic virus (TMV)-like nucleoprotein nanotubes is possible using 3'-terminally surface-linked scaffold RNAs containing the viral origin of assembly (OAS). In combination with TMV coat protein (CP) preparations, these scaffold RNAs can direct the growth of selectively addressable multivalent carrier particles directly at sites of interest on demand. Serving as adapter templates for the installation of functional molecules, they may promote an integration of active units into miniaturized technical devices, or enable their presentation on soft-matter nanotube systems at high surface densities advantageous for, for example, biodetection or purification applications. This chapter describes all procedures essential for the bottom-up fabrication of "nanostar" colloids with gold cores and multiple TMV-like arms, immobilized in a programmable manner by way of hybridization of the RNA scaffolds to oligodeoxynucleotides exposed on the gold beads.
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Affiliation(s)
- Christina Wege
- Department of Molecular Biology and Plant Virology, Institute of Biomaterials and Biomolecular Systems, University of Stuttgart, Stuttgart, Germany.
| | - Fabian J Eber
- Department of Molecular Biology and Plant Virology, Institute of Biomaterials and Biomolecular Systems, University of Stuttgart, Stuttgart, Germany
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Zhao W, Wang Z, Chen L, Huang C, Huang Y, Jia N. A biomimetic Au@BSA-DTA nanocomposites-based contrast agent for computed tomography imaging. Mater Sci Eng C Mater Biol Appl 2017; 78:565-70. [PMID: 28576022 DOI: 10.1016/j.msec.2017.04.127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 04/20/2017] [Accepted: 04/21/2017] [Indexed: 01/24/2023]
Abstract
Early detection of cancer is increasingly important for being considered to increase the survival rate in the treatment process. The past decades years have witnessed the great progress in the biological detection application of gold nanoparticles. Herein, we reported a facile one-pot synthesis process to obtain gold nanoparticles (Au@BSA) with bovine serum albumin (BSA) as a biotemplate following with conjugation of diatrizoic acid (DTA) for a potential X-ray computed tomography (CT) imaging contrast agent (Au@BSA-DTA). The as-prepared biomimetic material was characterized systematically by several techniques. It was shown that the prepared biomaterial is colloid stable under the tested range of pH and temperature. The cell cytotoxicity assay, hemolytic assay and cell morphology observation showed that Au@BSA-DTA has good biocompatibility and hemocompatibility at a concentration of Au even up to 80μg/mL. Besides, the biomimetic material Au@BSA-DTA with double radiodense elements of Au and iodine displayed much stronger CT imaging effect compared with the traditional small molecule contrast agents, which paves the potential clinical application in cancer early diagnosis.
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Chen JY, Yang CY, Chen PY. Synthesis of hierarchically porous structured CaCO3 and TiO2 replicas by sol-gel method using lotus root as template. Mater Sci Eng C Mater Biol Appl 2016; 67:85-97. [PMID: 27287102 DOI: 10.1016/j.msec.2016.04.092] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 04/21/2016] [Accepted: 04/27/2016] [Indexed: 11/18/2022]
Abstract
Intensive attention has been put in mimicking the morphologies in nature owing to their uniqueness, complexity, and diversity. One of the effective approaches to mimic bio-morphologies is through biotemplating - the technique of using biological structures as template to reproduce intricate structure in other forms of materials. This work presents a facile sol-gel technique that can be widely used to convert various carbon-rich bio-structures into different materials. Lotus root, a biomorphic template with high porosity at varying length scales, was selected as the example to demonstrate this approach. The experiment was conducted by infiltrating precursors - titanium (IV) n-butoxide (TnBT) and acetic acid calcium solution - into the lotus root template under vacuum system, followed by calcination. After the treatment, the replicas were calcite CaCO3 and anatase TiO2. In both CaCO3 and TiO2 replicas, the intact structure of the template was preserved. In spite of the overall similarity of the CaCO3 and TiO2 lotus root replicas, some respective differences were found. TiO2 replica was covered with nanowire bundles of 100-200nm in diameter, formed by preferable crystallization of particles, while CaCO3 replica presented the gradient-distributed pores of 10-100μm, which greatly resembled the microstructure of lotus root template. In the BET result, TiO2 replica was mesoporous structure with pores centralizing in 3-4nm. On the other hand, CaCO3 replica had pores in a wider distribution ranging from micro to macro scale. In addition, the surface area was greatly enhanced in both cases. The synthesized materials with hierarchical biomorphic structures may have great potential for purification applications due to their large specific surface area, photocatalytic property, and high adsorption rate.
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Affiliation(s)
- Jui-Yi Chen
- Material Science and Engineering Department, National Tsing-Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu30013, Taiwan ROC
| | - Ching-Yu Yang
- Material Science and Engineering Department, National Tsing-Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu30013, Taiwan ROC
| | - Po-Yu Chen
- Material Science and Engineering Department, National Tsing-Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu30013, Taiwan ROC.
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Menchaca-Nal S, Londoño-Calderón CL, Cerrutti P, Foresti ML, Pampillo L, Bilovol V, Candal R, Martínez-García R. Facile synthesis of cobalt ferrite nanotubes using bacterial nanocellulose as template. Carbohydr Polym 2015; 137:726-731. [PMID: 26686185 DOI: 10.1016/j.carbpol.2015.10.068] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 10/16/2015] [Accepted: 10/18/2015] [Indexed: 10/22/2022]
Abstract
A facile method for the preparation of cobalt ferrite nanotubes by use of bacterial cellulose nanoribbons as a template is described. The proposed method relays on a simple coprecipitation operation, which is a technique extensively used for the synthesis of nanoparticles (either isolated or as aggregates) but not for the synthesis of nanotubes. The precursors employed in the synthesis are chlorides, and the procedure is carried out at low temperature (90 °C). By the method proposed a homogeneous distribution of cobalt ferrite nanotubes with an average diameter of 217 nm in the bacterial nanocellulose (BC) aerogel (3%) was obtained. The obtained nanotubes are formed by 26-102 nm cobalt ferrite clusters of cobalt ferrite nanoparticles with diameters in the 9-13 nm interval. The nanoparticles that form the nanotubes showed to have a certain crystalline disorder, which could be attributed in a greater extent to the small crystallite size, and, in a lesser extent, to microstrains existing in the crystalline lattice. The BC-templated-CoFe2O4 nanotubes exhibited magnetic behavior at room temperature. The magnetic properties showed to be influenced by a fraction of nanoparticles in superparamagnetic state.
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Affiliation(s)
- S Menchaca-Nal
- Institute of Polymer Technology and Nanotechnology, Faculty of Engineering, University of Buenos Aires-CONICET, Argentina
| | - C L Londoño-Calderón
- Institute of Polymer Technology and Nanotechnology, Faculty of Engineering, University of Buenos Aires-CONICET, Argentina
| | - P Cerrutti
- Department of Chemical Engineering, Faculty of Engineering, University of Buenos Aires, Argentina
| | - M L Foresti
- Institute of Polymer Technology and Nanotechnology, Faculty of Engineering, University of Buenos Aires-CONICET, Argentina
| | - L Pampillo
- Institute of Technology and Engineering Sciences "Hilario Fernández Long", Faculty of Engineering, University of Buenos Aires-CONICET, Argentina
| | - V Bilovol
- Institute of Technology and Engineering Sciences "Hilario Fernández Long", Faculty of Engineering, University of Buenos Aires-CONICET, Argentina
| | - R Candal
- Institute of Physical Chemistry of Materials Environment and Energy, Faculty of Natural Sciences, University of Buenos Aires-CONICET, Argentina
| | - R Martínez-García
- Faculty of Natural Resources, National University of Formosa-CONICET, Campus Universitario, Modulo I, Av. Gutnisky 3200, Formosa, Argentina.
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Murugappan G, Parthasarathy M. Bio-inspired morphological evolution of zinc oxide nanostructures on a tunable enzyme platform. Enzyme Microb Technol 2014; 61-62:13-6. [PMID: 24910331 DOI: 10.1016/j.enzmictec.2014.04.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 04/06/2014] [Accepted: 04/11/2014] [Indexed: 11/27/2022]
Abstract
Diamine oxidase is a copper-containing enzyme with interesting structural dynamics sensitive to environmental conditions. The present work explores the applicability of the system as a tunable platform for the shape and size selective synthesis of zinc oxide nanoparticles under ambient conditions. Significant changes in the nanoscale morphology of ZnO have been observed, using scanning electron microscopy, with respect to changes in pH and gas atmosphere of the medium. More specifically, hexagonal plates of nanoscale ZnO were formed at pH below the isoelectric point of the enzyme and spherical particles at alkaline pH. Interestingly the average particle size of ZnO nanostructures increases with increasing oxygen content at acidic pH while the opposite trend is noticed at alkaline pH. The observations are explained on the basis of changes in the enzyme's surface charge, conformation and redox potential using a combination of techniques like zeta potential measurements, FTIR spectroscopy, fluorescence spectroscopy, open circuit potential studies and cyclic voltammetry. Thus the present work demonstrates the applicability of an enzyme as a dynamic bio-template for the synthesis of a multitude of ZnO nanostructures which are expected to add newer insight into bottom-up fabrication of oxide nanostructures.
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Affiliation(s)
- Gunavadhi Murugappan
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur, Tamil Nadu 613 401, India
| | - Meera Parthasarathy
- Centre for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur, Tamil Nadu 613 401, India.
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Yu Q, Sasaki K, Hirajima T. Bio-templated synthesis of lithium manganese oxide microtubes and their application in Li+ recovery. J Hazard Mater 2013; 262:38-47. [PMID: 24007997 DOI: 10.1016/j.jhazmat.2013.08.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 08/05/2013] [Accepted: 08/11/2013] [Indexed: 06/02/2023]
Abstract
Microbial transformations, a primary pathway for the Mn oxides formation in nature, provide potential for material-oriented researchers to fabricate new materials. Using Mn oxidizing fungus Paraconiothyrium sp. WL-2 as a bio-oxidizer as well as a bio-template, a special lithium ion sieve with microtube morphology was prepared through a solid-state transformation. Varying the calcination temperature from 300 to 700 °C was found to influence sample properties and consequently, the adsorption of Li(+). Lithium manganese oxide microtube (LMO-MTs) calcined at different temperatures as well as their delithiated products (HMO-MTs) were characterized by X-ray diffraction (XRD), X-ray absorption fine structure (XAFS) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Calcination temperatures affect not only the content but also the crystal structure of LMO spinel, which is important in Li(+) adsorption. The optimized sample was obtained after calcination at 500 °C for 4h, which shows higher Li(+) adsorption capacity than particulate materials.
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Affiliation(s)
- Qianqian Yu
- Department of Earth Resources Engineering, Kyushu University, 744 Motooka, Fukuoka 819-0395, Japan.
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12
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Ramimoghadam D, Bin Hussein MZ, Taufiq-Yap YH. Hydrothermal synthesis of zinc oxide nanoparticles using rice as soft biotemplate. Chem Cent J 2013; 7:136. [PMID: 23919386 PMCID: PMC3751658 DOI: 10.1186/1752-153x-7-136] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 07/25/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Rice as a renewable, abundant bio-resource with unique characteristics can be used as a bio-template to synthesize various functional nanomaterials. Therefore, the effect of uncooked rice flour as bio-template on physico-chemical properties, especially the morphology of zinc oxide nanostructures was investigated in this study. The ZnO particles were synthesized through hydrothermal-biotemplate method using zinc acetate-sodium hydroxide and uncooked rice flour at various ratios as precursors at 120°C for 18 hours. RESULTS The results indicate that rice as a bio-template can be used to modify the shape and size of zinc oxide particles. Different morphologies, namely flake-, flower-, rose-, star- and rod-like structures were obtained with particle size at micro- and nanometer range. Pore size and texture of the resulting zinc oxide particles were found to be template-dependent and the resulting specific surface area enhanced compared to the zinc oxide synthesized without rice under the same conditions. However, optical property particularly the band gap energy is generally quite similar. CONCLUSION Pure zinc oxide crystals were successfully synthesized using rice flour as biotemplate at various ratios of zinc salt to rice. The size- and shape-controlled capability of rice to assemble the ZnO particles can be employed for further useful practical applications.
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Affiliation(s)
- Donya Ramimoghadam
- Material Synthesis and Characterization Laboratory (MSCL), Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Mohd Zobir Bin Hussein
- Research center for Catalysis Science and Technology PutraCAT, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Yun Hin Taufiq-Yap
- Research center for Catalysis Science and Technology PutraCAT, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
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