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Dunne PW, Starkey CL, Gimeno-Fabra M, Lester EH. The rapid size- and shape-controlled continuous hydrothermal synthesis of metal sulphide nanomaterials. NANOSCALE 2014; 6:2406-2418. [PMID: 24435800 DOI: 10.1039/c3nr05749f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Continuous flow hydrothermal synthesis offers a cheap, green and highly scalable route for the preparation of inorganic nanomaterials which has predominantly been applied to metal oxide based materials. In this work we report the first continuous flow hydrothermal synthesis of metal sulphide nanomaterials. A wide range of binary metal sulphides, ZnS, CdS, PbS, CuS, Fe(1-x)S and Bi2S3, have been synthesised. By varying the reaction conditions two different mechanisms may be invoked; a growth dominated route which permits the formation of nanostructured sulphide materials, and a nucleation driven process which produces nanoparticles with temperature dependent size control. This offers a new and industrially viable route to a wide range of metal sulphide nanoparticles with facile size and shape control.
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Affiliation(s)
- Peter W Dunne
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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52
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Xia Q, Batentschuk M, Osvet A, Richter P, Häder DP, Schneider J, Brabec CJ, Wondraczek L, Winnacker A. Enhanced photosynthetic activity in Spinacia oleracea by spectral modification with a photoluminescent light converting material. OPTICS EXPRESS 2013; 21 Suppl 6:A909-A916. [PMID: 24514932 DOI: 10.1364/oe.21.00a909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The spectral conversion of incident sunlight by appropriate photoluminescent materials has been a widely studied issue for improving the efficiency of photovoltaic solar energy harvesting. By using phosphors with suitable excitation/emission properties, also the light conditions for plants can be adjusted to match the absorption spectra of chlorophyll dyes, in this way increasing the photosynthetic activity of the plant. Here, we report on the application of this principle to a high plant, Spinacia oleracea. We employ a calcium strontium sulfide phosphor doped with divalent europium (Ca0.4Sr0.6S:Eu(2+), CSSE) on a backlight conversion foil in photosynthesis experiments. We show that this phosphor can be used to effectively convert green to red light, centering at a wavelength of ~650 nm which overlaps the absorption peaks of chlorophyll a/b pigments. A measurement system was developed to monitor the photosynthetic activity, expressed as the CO2 assimilation rate of spinach leaves under various controlled light conditions. Results show that under identical external light supply which is rich in green photons, the CO2 assimilation rate can be enhanced by more than 25% when the actinic light is modified by the CSSE conversion foil as compared to a purely reflecting reference foil. These results show that the phosphor could be potentially applied to modify the solar spectrum by converting the green photons into photosynthetically active red photons for improved photosynthetic activity.
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53
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Broadband Luminescence in Rare Earth Doped Sr2SiS4: Relating Energy Levels of Ce3+ and Eu2. MATERIALS 2013; 6:3663-3675. [PMID: 28811459 PMCID: PMC5521328 DOI: 10.3390/ma6083663] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 07/17/2013] [Accepted: 08/13/2013] [Indexed: 11/25/2022]
Abstract
Sr2SiS4:Ce3+ is an efficient blue-emitting (460 nm) phosphor, excitable with light of wavelengths up to 420 nm. From the excitation spectrum, we construct the energy level scheme and use it to check the predictive power of the Dorenbos model, relating the positions of the Ce3+ energy levels with those of Eu2+ in the same host. For strontium thiosilicate, this method gives excellent results and allows us to determine which of two available crystallographic sites is occupied by cerium. We use the Dorenbos method for extracting information on the coordination of Ce3+ from the observed crystal field splitting.
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54
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Solar spectral conversion for improving the photosynthetic activity in algae reactors. Nat Commun 2013; 4:2047. [DOI: 10.1038/ncomms3047] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 05/22/2013] [Indexed: 12/11/2022] Open
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55
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Bazhin DN, Kudyakova YS, Gorbunova TI, Kozhevnikova NS, Suntsov AY, Burgart YV, Rempel’ AA, Saloutin VI, Chupakhin ON. Water-soluble 2-aminomethylidene-1,3-dicarbonyl compounds as new chalcogenide colloidal stabilizers. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2013. [DOI: 10.1134/s1070428013030019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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56
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Three 3d–4f heterometallic coordination polymers based on polydentate ligand and sulfate: Synthesis, crystal structure and photoluminescent properties. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2012.10.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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57
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Yakimanskii AV, Goikhman MY, Podeshvo IV, Anan’eva TD, Nekrasova TN, Smyslov RY. Luminescence of Ln3+ lanthanide complexes in polymer matrices. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x1209009x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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58
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Shang M, Geng D, Kang X, Yang D, Zhang Y, Lin J. Hydrothermal Derived LaOF:Ln3+ (Ln = Eu, Tb, Sm, Dy, Tm, and/or Ho) Nanocrystals with Multicolor-Tunable Emission Properties. Inorg Chem 2012; 51:11106-16. [DOI: 10.1021/ic301662c] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mengmeng Shang
- State Key
Laboratory of Rare
Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R.
China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Dongling Geng
- State Key
Laboratory of Rare
Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R.
China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaojiao Kang
- State Key
Laboratory of Rare
Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R.
China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Dongmei Yang
- State Key
Laboratory of Rare
Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R.
China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yang Zhang
- State Key
Laboratory of Rare
Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R.
China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jun Lin
- State Key
Laboratory of Rare
Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R.
China
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Jeong YK, Cho DH, Kim KB, Kang JG. Highly Luminescent (Zn0.6Sr0.3Mg0.1)2Ga2S5:Eu2+Green Phosphors for a White Light-Emitting Diode. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.8.2523] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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60
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Shang M, Li G, Kang X, Yang D, Geng D, Peng C, Cheng Z, Lian H, Lin J. LaOF : Eu3+ nanocrystals: hydrothermal synthesis, white and color-tuning emission properties. Dalton Trans 2012; 41:5571-80. [DOI: 10.1039/c2dt30082f] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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61
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Sun YG, Xiong G, Guo MY, Ding F, Wang SJ, Smet PF, Poelman D, Gao EJ, Verpoort F. Hydrothermal synthesis, crystal structure and properties of Ni(ii)–4f complexes based on 1H-benzimidazole-5,6-dicarboxylic acid. Dalton Trans 2012; 41:7670-80. [DOI: 10.1039/c2dt30277b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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62
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Composition and Conductivity-type Analysis of Spray Pyrolysed ZnS Thin Films using Photoluminescence. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.egypro.2012.02.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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63
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Van den Eeckhout K, Smet PF, Poelman D. Luminescent Afterglow Behavior in the M₂Si₅N₈: Eu Family (M = Ca, Sr, Ba). MATERIALS (BASEL, SWITZERLAND) 2011; 4:980-990. [PMID: 28879962 PMCID: PMC5448633 DOI: 10.3390/ma4060980] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 05/18/2011] [Accepted: 05/26/2011] [Indexed: 11/16/2022]
Abstract
Persistent luminescent materials are able to emit light for hours after being excited. The majority of persistent phosphors emit in the blue or green region of the visible spectrum. Orange- or red-emitting phosphors, strongly desired for emergency signage and medical imaging, are scarce. We prepared the nitrido-silicates Ca₂Si₅N₈:Eu (orange), Sr₂Si₅N₈:Eu (reddish), Ba₂Si₅N₈:Eu (yellowish orange), and their rare-earth codoped variants (R = Nd, Dy, Sm, Tm) through a solid state reaction, and investigated their luminescence and afterglow properties. In this paper, we describe how the persistent luminescence is affected by the type of codopant and the choice and ratio of the starting products. All the materials exhibit some form of persistent luminescence, but for Sr₂Si₅N₈:Eu,R this is very weak. In Ba₂Si₅N₈:Eu the afterglow remains visible for about 400 s, and Ca₂Si₅N₈:Eu,Tm shows the brightest and longest afterglow, lasting about 2,500 s. For optimal persistent luminescence, the dopant and codopant should be added in their fluoride form, in concentrations below 1 mol%. A Ca₃N₂ deficiency of about 5% triples the afterglow intensity. Our results show that Ba₂Si₅N₈:Eu(,R) and Ca₂Si₅N₈:Eu(,R) are promising persistent phosphors for applications requiring orange or red light.
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Affiliation(s)
- Koen Van den Eeckhout
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Gent, Belgium.
| | - Philippe F Smet
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Gent, Belgium.
| | - Dirk Poelman
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, 9000 Gent, Belgium.
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64
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Wu YC, Chen YC, Wang DY, Lee CS, Sun CC, Chen TM. α-(Y,Gd)FS:Ce3+: a novel red-emitting fluorosulfide phosphor for solid-state lighting. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12819a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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