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Mangood AH, Gemeay AH, Abdel-Galeil MM, Salama ES, El-Shater RE. Evaluation of synergistic approach of spinel cadmium-copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:106876-106893. [PMID: 37145354 PMCID: PMC10611890 DOI: 10.1007/s11356-023-27170-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 04/18/2023] [Indexed: 05/06/2023]
Abstract
Metal substitution is an efficient strategy to improve the catalytic activity of ferrite-based catalysts. In this study, Cd0.5Cu0.5-xAgxFe2O4 (where 0 ≤ x ≤ 0.5) ferrites were fabricated via a simple co-precipitation method. The influence of the silver ions on the structural, magnetic, and catalytic characteristics of the spinel nanoparticles, as well as on their morphology, was examined. X-ray diffractograms revealed a crystalline cubic spinel structure with crystallite sizes in the nanoregime (7-15 nm). The saturation magnetization reduced from 29.8 to 2.80 emu as the Ag+ doping increased. Two prominent absorption bands were visible in Fourier-transform infrared spectra at 600 cm-1 and 400 cm-1, respectively, and they belonged to the tetrahedral (A) and octahedral (B) sites. The samples were then used as catalysts for the oxidative breakdown of the typical organic contaminant indigo carmine dye (IC). The catalytic process followed the first-order kinetic model, and the rate constant increased from 0.007 to 0.023 min-1 with increasing of Ag+ doping. Cd0.5Cu0.5-xAgxFe2O4 exhibited excellent catalytic performance in the pH range of 2-11, which means that they are promising efficient and stable materials for Fenton-based alkaline wastewater treatment. Finally, the pathway includes, HO•, HO2-•, and O2-• as oxidants resulted from the synergistic effects of Fe3+, Cu2+, and Ag+, with H2O2 and surface hydroxyl groups have been proposed.
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Affiliation(s)
- Ahmed H Mangood
- Chemistry Department, Faculty of Science, Menofia University, Shabien Elkom, Egypt
| | - Ali H Gemeay
- Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.
| | | | - Eman Sh Salama
- Chemistry Department, Faculty of Science, Menofia University, Shabien Elkom, Egypt
| | - Reda E El-Shater
- Physics Department, Faculty of Science, Tanta University, Tanta, Egypt
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2
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Velgosova O, Mačák L, Čižmárová E, Mára V. Influence of Reagents on the Synthesis Process and Shape of Silver Nanoparticles. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6829. [PMID: 36234170 PMCID: PMC9571871 DOI: 10.3390/ma15196829] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
The aim of this study was to prepare the silver nanoparticles (AgNPs) via chemical reduction and analyze the impact of used reduction agents: sodium borohydride (NaBH4), trisodium citrate (TSC), polyvinylpyrrolidone (PVP), and hydrogen peroxide (H2O2) on the reduction rate of Ag+ ions to Ag0, and on nanoparticles shape. It was proven that combinations of reduction agents dramatically influence the synthesis rate of AgNPs and the color of solutions, which depends on the shape and size of nanoparticles. NaBH4, TSC, and PVP showed good reduction power. In particular, TSC proved to be a key factor influencing the shape of AgNPs. The shape of nanoparticles influences the color of colloidal solutions. Yellow solutions, where UV-vis absorbance maxima (ABSmax) are in the wavelength interval 380-420 nm, contain spherical particles with a mean size of 25 nm, whereas the blue shift of ABSmax to wavelengths higher than 750 nm indicate the presence of triangular nanoparticles (size interval 18-150 nm). A mixture of spherical, triangular, irregular, and hexagonal nanoparticles give different color, e.g., green. The formation and stability of AgNPs was tracked by UV-vis spectroscopy, size and shape by TEM techniques, and particle size distribution was studied by particle size analyzer.
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Affiliation(s)
- Oksana Velgosova
- Institute of Materials and Quality Engineering, Faculty of Materials Metallurgy and Recycling, Technical University of Košice, Letná 9/A, 042 00 Košice, Slovakia
| | - Lívia Mačák
- Institute of Materials and Quality Engineering, Faculty of Materials Metallurgy and Recycling, Technical University of Košice, Letná 9/A, 042 00 Košice, Slovakia
| | - Elena Čižmárová
- Department of Materials Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Karlovo nám. 13, 121 32 Prague 2, Czech Republic
| | - Vladimír Mára
- Department of Materials Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Karlovo nám. 13, 121 32 Prague 2, Czech Republic
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Chen J, He L, Fan Z, Yang H, Mao H, Ren Y, Yin J, Dai W, Cui H. Ferric Chloride-Induced Synthesis of Silver Nanodisks with Considerable Activity for the Reduction of 4-Nitrophenol. ACS OMEGA 2022; 7:28860-28865. [PMID: 36033709 PMCID: PMC9404193 DOI: 10.1021/acsomega.2c01928] [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: 03/29/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Silver nanodisks (AgNDs) have been successfully synthesized by using ferric chloride as an auxiliary agent in the presence of polyvinylpyrrolidone and N,N-dimethylformamide as both a solvent and a reducing agent. The mass ratio of reactants, temperature, and time were demonstrated to be the key factors determining the morphology of the product, and the conversion of Fe3+/Fe2+ ions played an important role in increasing the ratio of silver nanosheets (AgNSs). As the reaction prolonged, the etching effect of Cl- ions on the tips of AgNSs became more and more obvious, which made the obtained typical polygonal AgNSs turn into AgNDs eventually. In addition, the prepared AgNDs exhibited a considerable catalytic activity in the reduction of 4-nitrophenol.
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Synthesis and Analysis of Polymorphic Silver Nanoparticles and Their Incorporation into the Polymer Matrix. Polymers (Basel) 2022; 14:polym14132666. [PMID: 35808712 PMCID: PMC9269157 DOI: 10.3390/polym14132666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/14/2022] [Accepted: 06/27/2022] [Indexed: 02/01/2023] Open
Abstract
A chemical method was successfully used to synthesize silver nanoparticles (AgNPs) with various shapes. The shape of the nanoparticles affects the color of the colloid (spherical—yellow solution, triangular—blue, a mixture of spherical and triangular—green). The NaBH4, which acts as the main reducing agent and H2O2 have a significant impact on the shape of AgNPs. It has also been shown that the ratio between precursor, reducing, and the stabilizing agent is crucial for the formation of the required nanoparticles. The light sensitivity of AgNPs and the presence of H2O2 lead to a significant change in AgNPs’ shape and size with time and to the formation of the dichroic effect. UV–vis spectrophotometry, TEM, SEM/FIB, and EDX methods were used to analyze the shape, size, and composition of the nanoparticles. Polymer matrix composite with AgNPs was prepared by the “ex-situ” method.
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5
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Tunable self-assembled Casimir microcavities and polaritons. Nature 2021; 597:214-219. [PMID: 34497392 DOI: 10.1038/s41586-021-03826-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/15/2021] [Indexed: 11/08/2022]
Abstract
Spontaneous formation of ordered structures-self-assembly-is ubiquitous in nature and observed on different length scales, ranging from atomic and molecular systems to micrometre-scale objects and living matter1. Self-ordering in molecular and biological systems typically involves short-range hydrophobic and van der Waals interactions2,3. Here we introduce an approach to micrometre-scale self-assembly based on the joint action of attractive Casimir and repulsive electrostatic forces arising between charged metallic nanoflakes in an aqueous solution. This system forms a self-assembled optical Fabry-Pérot microcavity with a fundamental mode in the visible range (long-range separation distance about 100-200 nanometres) and a tunable equilibrium configuration. Furthermore, by placing an excitonic material in the microcavity region, we are able to realize hybrid light-matter states (polaritons4-6), whose properties, such as coupling strength and eigenstate composition, can be controlled in real time by the concentration of ligand molecules in the solution and light pressure. These Casimir microcavities could find future use as sensitive and tunable platforms for a variety of applications, including opto-mechanics7, nanomachinery8 and cavity-induced polaritonic chemistry9.
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Lima MJA, Reis BF. Photogeneration of silver nanoparticles induced by UV radiation and their use as a sensor for the determination of chloride in fuel ethanol using a flow-batch system. Talanta 2019; 201:373-378. [PMID: 31122437 DOI: 10.1016/j.talanta.2019.03.118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 03/28/2019] [Accepted: 03/30/2019] [Indexed: 11/26/2022]
Abstract
Photogeneration of silver chloride nanoparticles (AgCl-NPs) in fuel ethanol was used as a sensor for the spectrophotometric determination of chloride. A low-power UV radiation source (germicidal lamp) was placed close to a flow-batch chamber and a 3D-built support for the reaction chamber was used to couple fiber optic cables in the orthogonal direction with the UV-lamp beam, allowing the monitoring of nanoparticle formation in real-time using a spectrophotometer. The nanoparticles were characterized via high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, and UV-vis spectroscopy. Most of the particles exhibited a spherical shape with an average diameter of 18 nm. The absorbance maximum was observed at 440 nm and was used for chloride determination in fuel ethanol. Under the optimized working conditions, the system exhibited a linear response from 0.05 to 0.8 mg L-1 chloride, with a limit of detection (95%) and coefficient of variation (n = 8) were estimated to be 12 μg L-1 chloride and 2.2%, respectively. The intra- and inter-day precisions (coefficient of variation) were 2.4% and 2.8%, respectively. This working range (0.05-0.8 mg L-1) for the determination of chloride at low concentrations met the limit required by Brazilian legislation (limit of 1.0 mg kg-1). Analyses of fuel ethanol were performed without sample treatment and the obtained results were compared with those obtained by ion-chromatography. No significant differences were observed between the two methods at the 95% confidence level.
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Affiliation(s)
- Manoel J A Lima
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, 13400-970, Brazil
| | - Boaventura F Reis
- Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, SP, 13400-970, Brazil.
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Park H, Ambade RB, Noh SH, Eom W, Koh KH, Ambade SB, Lee WJ, Kim SH, Han TH. Porous Graphene-Carbon Nanotube Scaffolds for Fiber Supercapacitors. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9011-9022. [PMID: 30653285 DOI: 10.1021/acsami.8b17908] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Fiber nanomaterials can become fundamental devices that can be woven into smart textiles, for example, miniaturized fiber-based supercapacitors (FSCs). They can be utilized for portable, wearable electronics and energy storage devices, which are highly prospective areas of research in the future. Herein, we developed porous carbon nanotube-graphene hybrid fibers (CNT-GFs) for all-solid-state symmetric FSCs, which were assembled through wet-spinning followed by a hydrothermal activation process using environmentally benign chemicals (i.e., H2O2 and NH4OH in deionized water). The barriers that limited effective ion accessibility in GFs were overcome by the intercalation of CNTs in the GFs which enhanced their electrical conductivity and mechanical properties as well. The all-solid-state symmetric FSCs of a precisely controlled activated hybrid fiber (a-CNT-GF) electrode exhibited an enhanced volumetric capacitance of 60.75 F cm-3 compared with those of a pristine CNT-GF electrode (19.80 F cm-3). They also showed a volumetric energy density (4.83 mWh cm-3) roughly 3 times higher than that of untreated CNT-GFs (1.50 mWh cm-3). The excellent mechanical flexibility and structural stability of a miniaturized a-CNT-GF are highlighted by the demonstration of negligible differences in capacitance upon bending and twisting. The mechanism of developing porous, large-scale, low-cost electrodes using an environmentally benign activation method presented in this work provides a promising route for designing a new generation of wearable, portable miniaturized energy storage devices.
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Affiliation(s)
| | | | | | | | | | | | - Won Jun Lee
- Department of Fiber System Engineering , Dankook University , Yongin 16890 , Republic of Korea
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Yonezawa T, Čempel D, Nguyen MT. Microwave-Induced Plasma-In-Liquid Process for Nanoparticle Production. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180285] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tetsu Yonezawa
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - David Čempel
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Mai Thanh Nguyen
- Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
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9
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Nishimoto M, Abe S, Yonezawa T. Preparation of Ag nanoparticles using hydrogen peroxide as a reducing agent. NEW J CHEM 2018. [DOI: 10.1039/c8nj01747f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The particle growth mechanism and antibacterial property of Ag nanoparticles prepared by H2O2 reduction was firstly discussed.
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Affiliation(s)
- Masamu Nishimoto
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - Shigeaki Abe
- Department of Biomaterials and Bioengineering
- Graduate School of Dental Medicine
- Hokkaido University
- Sapporo
- Japan
| | - Tetsu Yonezawa
- Division of Materials Science and Engineering
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
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Nishimoto M, Tsukamoto H, Nguyen MT, Yonezawa T. Effects of Additives on the Preparation of Ag Nanoparticles Using the Microwave-Induced Plasma in Liquid Process. ChemistrySelect 2017. [DOI: 10.1002/slct.201701462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masamu Nishimoto
- Hokkaido University, Kita 13 Nishi 8, Kita-ku; Sapporo, Hokkaido 060-8628 Japan
| | - Hiroki Tsukamoto
- Hokkaido University, Kita 13 Nishi 8, Kita-ku; Sapporo, Hokkaido 060-8628 Japan
| | - Mai Thanh Nguyen
- Hokkaido University, Kita 13 Nishi 8, Kita-ku; Sapporo, Hokkaido 060-8628 Japan
| | - Tetsu Yonezawa
- Hokkaido University, Kita 13 Nishi 8, Kita-ku; Sapporo, Hokkaido 060-8628 Japan
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11
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Gatemala H, Ekgasit S, Wongravee K. High purity silver microcrystals recovered from silver wastes by eco-friendly process using hydrogen peroxide. CHEMOSPHERE 2017; 178:249-258. [PMID: 28329714 DOI: 10.1016/j.chemosphere.2017.03.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 02/21/2017] [Accepted: 03/12/2017] [Indexed: 06/06/2023]
Abstract
A simple, rapid, and environmentally friendly process using hydrogen peroxide, was developed for recovering high purity silver directly from industry and laboratory wastes. Silver ammine complex, [Ag(NH3)2]+Cl-, derived from AgCl were generated and then directly reduced using H2O2 to reliably turn into high purity microcrystalline silver (99.99%) examined by EDS and XRD. Morphology of the recovered silver microcrystals could be selectively tuned by an addition of poly(vinyl pyrrolidone). The main parameters in the recovering process including pH, concentration of Ag+ and the mole ratio of H2O2:Ag+ were carefully optimized though the central composite design (CCD). The optimized condition was employed for a trial recovery of 50 L silver ammine complex prepared from a collection of silver-wastes during 3-year research on industrial nanoparticle production. The recovered silver microcrystals >700 g could be recovered with 91.27%. The remaining solution after filtering of the recovered silver microcrystals can be used repeatedly (at least 8 cycles) without losing recovery efficiency. Matrix interferences including Pb2+ and Cl- play a minimal role in our silver recovery process. Furthermore, the direct usage of the recovered silver microcrystals was demonstrated by using as a raw material of silver clay for creating a set of wearable silver jewelries.
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Affiliation(s)
- Harnchana Gatemala
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, Patumwan, Bangkok 10330, Thailand
| | - Sanong Ekgasit
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, Patumwan, Bangkok 10330, Thailand
| | - Kanet Wongravee
- Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phyathai Road, Patumwan, Bangkok 10330, Thailand; Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330 Thailand.
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12
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Zhang XY, Zhou HL, Shan F, Xue XM, Su D, Liu YR, Chen YZ, Wu JY, Zhang T. Synthesis of silver nanoplate based two-dimension plasmonic platform from 25 nm to 40 μm: growth mechanism and optical characteristic investigation in situ. RSC Adv 2017. [DOI: 10.1039/c7ra10952k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We show high-purity synthesis, structural engineering and in situ optical investigation of a 2D plasmonic platform using huge silver nanoplates.
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Affiliation(s)
- Xiao-Yang Zhang
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
| | - Huan-Li Zhou
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
| | - Feng Shan
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
| | - Xiao-Mei Xue
- Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology
- Ministry of Education
- School of Instrument Science and Engineering
- Southeast University
- Nanjing
| | - Dan Su
- Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology
- Ministry of Education
- School of Instrument Science and Engineering
- Southeast University
- Nanjing
| | - Yi-Ran Liu
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
| | - Yu-Zhang Chen
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
| | - Jing-Yuan Wu
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
| | - Tong Zhang
- Joint International Research Laboratory of Information Display and Visualization
- School of Electronic Science and Engineering
- Southeast University
- Nanjing
- People’s Republic of China
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Tan CF, Azmansah SAB, Zhu H, Xu QH, Ho GW. Spontaneous Electroless Galvanic Cell Deposition of 3D Hierarchical and Interlaced S-M-S Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1604417. [PMID: 27758002 DOI: 10.1002/adma.201604417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 09/13/2016] [Indexed: 06/06/2023]
Abstract
One-pot electroless galvanic cell deposition of a 3D hierarchical semiconductor-metal-semiconductor interlaced nanoarray is demonstrated. The fabricated 3D photoanode deviates from the typical planar geometry, and aims to optimize the effective surface area for light harvesting and long-range charge transfer-collection pathways.
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Affiliation(s)
- Chuan Fu Tan
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583
| | - Siti Aishah Bte Azmansah
- Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575
| | - Hai Zhu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543
| | - Qing-Hua Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583
- Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore, 117602
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Gatemala H, Thammacharoen C, Ekgasit S, Pienpinijtham P. 3D nanoporous Ag microstructures fabricated from AgCl microcrystal templates via concerted oxidative etching/re-deposition and galvanic replacement. CrystEngComm 2016. [DOI: 10.1039/c6ce01260d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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