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Wala M, Łubiarz D, Waloszczyk N, Simka W. Plasma Electrolytic Oxidation of Titanium in Ni and Cu Hydroxide Suspensions towards Preparation of Electrocatalysts for Urea Oxidation. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2191. [PMID: 36984072 PMCID: PMC10051287 DOI: 10.3390/ma16062191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
The increasing climate crisis requires an improvement in renewable energy technologies. One of them are fuel cells, devices that are capable of generating electricity directly from the chemical reaction that is taking place inside of them. Despite the advantages of these solutions, a lack of the appropriate materials is holding them back from commercialization. This research shows preliminary results from a simple way to prepare black TiO2 coatings, doped with Cu or Ni using the plasma electrolytic oxidation process, which can be used as anodes in urea-fueled fuel cells. They show activity toward urea oxidation, with a maximum current density of 130 μA cm-2 (@1 V vs. Hg|HgO) observed for Cu-enhanced TiO2 and low potential of only 0.742 V (Vs Hg|HgO) required for 50 μA cm-2 for Ni-enhanced TiO2. These results demonstrate how the PEO process can be used for the preparation of TiO2-based doped materials with electrocatalytic properties toward urea electrooxidation.
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Lyulyukin MN, Kovalevskiy NS, Fedorova EA, Selishchev DS, Kozlov DV. Effect of temperature on the action spectra of pristine and Cu-grafted titania. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.03.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
Chemiresistors based on thin films of the Li-doped CuO–TiO2 heterojunctions were synthesized by a 2-step method: (i) repeated ion beam sputtering of the building elements (on the Si substrates and multisensor platforms); and (ii) thermal annealing in flowing air. The structure and composition of the films were analyzed by several methods: Rutherford Backscattering (RBS), Neutron Depth Profiling (NDP), Secondary Ion Mass Spectrometry (SIMS), and Atomic Force Microscopy (AFM), and their sensitivity to gaseous analytes was evaluated using a specific lab-made device operating in a continuous gas flow mode. The obtained results showed that the Li doping significantly increased the sensitivity of the sensors to oxidizing gases, such as NO2, O3, and Cl2, but not to reducing H2. The sensing response of the CuO–TiO2–Li chemiresistors improved with increasing Li content. For the best sensors with about 15% Li atoms, the detection limits were as follows: NO2 → 0.5 ppm, O3 → 10 ppb, and Cl2 → 0.1 ppm. The Li-doped sensors showed excellent sensing performance at a lower operating temperature (200 °C); however, even though their response time was only a few minutes, their recovery was slow (up to a few hours) and incomplete.
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Cu-Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8112067] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Surface contamination by microbes is a major public health concern. A damp environment is one of potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO2) can effectively curb this growing threat. Metal-doped titania in anatase phase has been proven as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu)-doped TiO2 (Cu-TiO2) was evaluated against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO2 was carried out via sol-gel technique. Cu-TiO2 further calcined at various temperatures (in the range of 500–700 °C) to evaluate the thermal stability of TiO2 anatase phase. The physico-chemical properties of the samples were characterized through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV–visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO2 was maintained well, up to 650 °C, by the Cu dopant. UV–vis results suggested that the visible light absorption property of Cu-TiO2 was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasize the introduction of Cu+ and Cu2+ ions by replacing Ti4+ ions in the TiO2 lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9999%) was attained in 30 min of visible light irradiation by Cu-TiO2.
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Jadhav MS, Kulkarni S, Raikar P, Barretto DA, Vootla SK, Raikar US. Green biosynthesis of CuO & Ag–CuO nanoparticles from Malus domestica leaf extract and evaluation of antibacterial, antioxidant and DNA cleavage activities. NEW J CHEM 2018. [DOI: 10.1039/c7nj02977b] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The reactivity of metallic and bimetallic nanoparticles of copper and silver towards in vitro study has been quantitatively investigated.
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Affiliation(s)
| | | | | | - Delicia A. Barretto
- Department of Biotechnology and Microbiology
- Karnatak University
- Dharwad 580003
- India
| | - Shyam Kumar Vootla
- Department of Biotechnology and Microbiology
- Karnatak University
- Dharwad 580003
- India
| | - U. S. Raikar
- Department of Physics
- Karnatak University
- Dharwad 580003
- India
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Muñoz-Batista MJ, Kubacka A, Fontelles-Carceller O, Tudela D, Fernández-García M. Surface CuO, Bi2O3, and CeO2 Species Supported in TiO2-Anatase: Study of Interface Effects in Toluene Photodegradation Quantum Efficiency. ACS APPLIED MATERIALS & INTERFACES 2016; 8:13934-13945. [PMID: 27203735 DOI: 10.1021/acsami.6b03081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The enhancement of active triggered by surface deposition of Cu, Bi, and Ce containing oxidic species onto a high surface area anatase is analyzed through the calculation of the quantum efficiency for toluene photodegradation under UV and Sunlight-type illumination. To this end, series of Cu, Bi, and Ce containing oxides supported on anatase were synthesized having a growing content of the Cu, Bi, and Ce surface species and characterized with X-ray diffraction and photoelectron, UV-visible, and photoluminescence spectroscopies as well as transmission electron microscopy. Utilizing the surface concentration of Cu, Bi, and Ce species as a tool, we analyzed the influence of the system physicochemical properties affecting quantum efficiency in anatase-based materials. First, employing small surface concentrations of the Cu, Bi, and Ce species deposited onto (the unperturbed) anatase, we provided evidence that all steps of the photocatalytic event, including light absorption, charge recombination, as well as surface interaction with the pollutant and chemical output as to activity and selectivity have significance in the quantitative assessment of the enhancement of the efficiency parameter. Second, we analyzed samples rendering maximum quantum efficiency within all these series of materials. The study indicates that maximum enhancement over anatase displays a magnitude strongly dependent on the efficiency level of calculation and would thus require the use of the most accurate one, and that it occurs through a balance between optoelectronic and chemical properties of the composite materials. The (Cu, Bi, Ce) oxide-anatase interface plays a major role modulating the optoelectronic properties of the solids and thus the efficiency observable.
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Affiliation(s)
- Mario J Muñoz-Batista
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de Investigaciones Cientificas (CSIC) , C/Marie Curie, 2, 28049 Madrid, Spain
| | - Anna Kubacka
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de Investigaciones Cientificas (CSIC) , C/Marie Curie, 2, 28049 Madrid, Spain
| | - Olga Fontelles-Carceller
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de Investigaciones Cientificas (CSIC) , C/Marie Curie, 2, 28049 Madrid, Spain
| | - David Tudela
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Campus Cantoblanco , 28049 Madrid, Spain
| | - Marcos Fernández-García
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de Investigaciones Cientificas (CSIC) , C/Marie Curie, 2, 28049 Madrid, Spain
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Artioli GA, Mancini A, Barbieri VR, Quattrini MC, Quartarone E, Mozzati MC, Drera G, Sangaletti L, Gombac V, Fornasiero P, Malavasi L. Correlation between Deposition Parameters and Hydrogen Production in CuO Nanostructured Thin Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1510-1520. [PMID: 26788810 DOI: 10.1021/acs.langmuir.5b03917] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this article, we report a systematic investigation of the role of (i) substrate temperature, (ii) oxygen partial pressure, and (iii) radio frequency (rf) power on the crystal structure and morphology of CuO nanostructured thin films prepared by means of rf-magnetron sputtering starting from a Cu metal target. On selected films, photocatalytic tests have been carried out in order to correlate the structural and morphological properties of the thin films prepared under different conditions with the photocatalytic properties and to find out the key parameters to optimize the CuO nanostructured films. All of the synthesized films were single-phase CuO nanorods of variable diameter between 80 and 200 nm. Better-aligned rods were obtained at relatively low substrate temperatures and from low to intermediate oxygen partial pressures, resulting in more efficient photocatalytic activities. Our investigation suggests a relevant role of the crystallographic orientation of the CuO tenorite film on the photocatalytic activity, as demonstrated by the significant improvement in H2 evolution for highly oriented films.
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Affiliation(s)
| | | | | | | | | | | | - Giovanni Drera
- I-LAMP and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore , 25121 Brescia, Italy
| | - Luigi Sangaletti
- I-LAMP and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore , 25121 Brescia, Italy
| | - Valentina Gombac
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR Trieste Research Unit and INSTM Research Unit, Trieste University , Trieste 34127, Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR Trieste Research Unit and INSTM Research Unit, Trieste University , Trieste 34127, Italy
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Lee JM, Jin HB, Kim IY, Jo YK, Hwang JW, Wang KK, Kim MG, Kim YR, Hwang SJ. A Crucial Role of Rh Substituent Ion in Photoinduced Internal Electron Transfer and Enhanced Photocatalytic Activity of CdS-Ti(5.2-x)/6 Rhx /2 O2 Nanohybrids. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:5771-5780. [PMID: 26456493 DOI: 10.1002/smll.201501806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/08/2015] [Indexed: 06/05/2023]
Abstract
The photocatalytic activity and photostability of CdS quantum dot (QD) can be remarkably enhanced by hybridization with Rh-substituted layered titanate nanosheet even at very low Rh substitution rate (<1%). Mesoporous CdS-Ti(5.2-x)/6 Rhx/2O2 nanohybrids are synthesized by a self-assembly of exfoliated Ti(5.2-x)/6 Rhx/2O2 nanosheets with CdS QDs. The partial substitution of Rh(3+)/Rh(4+) ions for Ti(4+) ions in layered titanate is quite effective in enhancing an electronic coupling between hybridized CdS and titanate components via the formation of interband Rh 4d states. A crucial role of Rh substituent ion in the internal electron transfer is obviously evidenced from in situ X-ray absorption spectroscopy showing the elongation of (RhO) bond under visible light irradiation. This is the first spectroscopic evidence for the important role of substituent ion in the photoinduced electron transfer of hybrid-type photocatalyst. The CdS-Ti(5.2-x)/6 Rhx/2O2 nanohybrids show much higher photocatalytic activity for H2 production and better photostability than do CdS and unsubstituted CdS-TiO2 nanohybrid. This result is ascribable to the enhancement of visible light absorptivity, the depression of electron-hole recombination, and the enhanced hole curing of CdS upon Rh substitution. The present study underscores that the hybridization with composition-controlled inorganic nanosheet provides a novel efficient methodology to optimize the photo-related functionalities of semiconductor nanocrystal.
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Affiliation(s)
- Jang Mee Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Hyung Bin Jin
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
- Department of Chemistry, College of Natural Sciences, Yonsei University, Seoul, 03722, Korea
| | - In Young Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Yun Kyung Jo
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
| | - Jung-Wook Hwang
- Department of Chemistry, College of Natural Sciences, Yonsei University, Seoul, 03722, Korea
| | - Kang-Kyun Wang
- Department of Chemistry, College of Natural Sciences, Yonsei University, Seoul, 03722, Korea
| | | | - Yong-Rok Kim
- Department of Chemistry, College of Natural Sciences, Yonsei University, Seoul, 03722, Korea
| | - Seong-Ju Hwang
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
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Sarkar D, Chattopadhyay KK. Branch density-controlled synthesis of hierarchical TiO2 nanobelt and tunable three-step electron transfer for enhanced photocatalytic property. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10044-59. [PMID: 24857888 DOI: 10.1021/am502379q] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The successful adjustment of phase composition and morphology of hierarchical TiO2 nanobelts, which feature homoepitaxial nanobranches, has been developed via the hydrothermal method and chemical bath deposition technique. Effects of hydrothermal reaction time, titanium butoxide treatment in chemical bath deposition, and calcination temperature are systematically investigated. For the first time, three-step ultrafast electron transfers between the band edges of the engaged phases are realized through the enhanced photocatalytic activity results. Growth mechanism related to branch density control on nanobelt surface under such soft chemical process is discussed in detail on the basis of classical nucleation theory. The current work might provide new insights into the fabrication of one-dimensional homoepitaxial branched TiO2 nanostructures as high performance photocatalysts and facilitate their application in environmental cleanup.
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Affiliation(s)
- Debabrata Sarkar
- School of Material Science & Nanotechnology, and ‡Thin Film & Nanoscience Laboratory, Department of Physics, Jadavpur University , Kolkata 700 032, India
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Logar M, Bračko I, Potočnik A, Jančar B. Cu and CuO/titanate nanobelt based network assemblies for enhanced visible light photocatalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4852-4862. [PMID: 24697758 DOI: 10.1021/la5008704] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
3D network configurations of copper(II) oxide/titanate nanobelt (CuO/TiNBs) and copper/titanate nanobelt (Cu/TiNBs) were formed using a two-step polyelectrolyte-assisted synthesis and assembly approach. The photoactivity of the TiNB/CuO and Cu/TiNB composite networks is significantly enhanced as compared to the activity of 3D structures formed of pristine TiNB. An efficient, UV-vis-light-induced electron transfer at the two-component interface achieved by the intimate coupling of TiNB with p-type semiconducting CuO and plasmonic Cu nanoparticles in composite heterostructures facilitates control over the system's exciton dynamics, which results in highly efficient UV-vis photocatalytic performance of heterostructures. The superior photocatalytic activity of the metal and semiconductor/semiconductor nanocomposite structures in the visible region is discussed, highlighting the role of interfacial electron-charge transfer (IFCT) in semiconductor-semiconductor (CuO/TiNB) and surface plasmon resonance (SPR) of Cu nanoparticles in metal-semiconductor heterostructures.
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Affiliation(s)
- Manca Logar
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
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Park S, Lee JM, Jo YK, Kim IY, Hwang SJ. A facile exfoliation-crystal growth route to multicomponent Ag2CO3/Ag-Ti5NbO14 nanohybrids with improved visible light photocatalytic activity. Dalton Trans 2014; 43:10566-73. [DOI: 10.1039/c4dt00018h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A novel visible light active photocatalyst is developed via a direct crystal growth of silver oxosalts on exfoliated titanoniobate nanosheets.
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Affiliation(s)
- Suhye Park
- Department of Chemistry and Nano Sciences
- Ewha Womans University
- Seoul 120-750, Korea
| | - Jang Mee Lee
- Department of Chemistry and Nano Sciences
- Ewha Womans University
- Seoul 120-750, Korea
| | - Yun Kyung Jo
- Department of Chemistry and Nano Sciences
- Ewha Womans University
- Seoul 120-750, Korea
| | - In Young Kim
- Department of Chemistry and Nano Sciences
- Ewha Womans University
- Seoul 120-750, Korea
| | - Seong-Ju Hwang
- Department of Chemistry and Nano Sciences
- Ewha Womans University
- Seoul 120-750, Korea
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Ogawa M, Saito K, Sohmiya M. A controlled spatial distribution of functional units in the two dimensional nanospace of layered silicates and titanates. Dalton Trans 2014; 43:10340-54. [DOI: 10.1039/c4dt00147h] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of the spatial distribution of functional units in the interlayer space of intercalation compounds are discussed.
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Affiliation(s)
- Makoto Ogawa
- Department of Earth Sciences
- Waseda University
- Tokyo 169-8050, Japan
- Graduate School of Creative Science and Engineering
- Waseda University
| | - Kanji Saito
- Graduate School of Creative Science and Engineering
- Waseda University
- Tokyo 169-8050, Japan
| | - Minoru Sohmiya
- Department of Earth Sciences
- Waseda University
- Tokyo 169-8050, Japan
- Graduate School of Creative Science and Engineering
- Waseda University
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Highly efficient visible light-induced O₂ generation by self-assembled nanohybrids of inorganic nanosheets and polyoxometalate nanoclusters. Sci Rep 2013; 3:2080. [PMID: 23801108 PMCID: PMC3693097 DOI: 10.1038/srep02080] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 06/11/2013] [Indexed: 11/24/2022] Open
Abstract
Unusually high photocatalytic activity of visible light-induced O2 generation can be achieved by electrostatically-derived self-assembly between exfoliated Zn-Cr-LDH 2D nanosheets and POM 0D nanoclusters (W7O246− and V10O286−) acting as an electron acceptor. This self-assembly can provide a high flexibility in the control of the chemical composition and pore structure of the resulting LDH-based nanohybrids. The hybridization with POM nanoclusters remarkably enhances the photocatalytic activity of the pristine Zn-Cr-LDH, which is attributable to the formation of porous structure and depression of charge recombination. Of prime interest is that the excellent photocatalytic activity of the as-prepared Zn-Cr-LDH-POM nanohybrid for visible light-induced O2 generation can be further enhanced by calcination at 200 °C, leading to the very high apparent quantum yield of ∼75.2% at 420 nm. The present findings clearly demonstrate that the self-assembly of LDH–POM is fairly powerful in synthesizing novel LDH-based porous nanohybrid photocatalyst for visible light-induced O2 generation.
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15
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Yellow–colored mesoporous pure titania and its high stability in visible light photocatalysis. POWDER TECHNOL 2013. [DOI: 10.1016/j.powtec.2013.04.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Fu J, Tian Y, Chang B, Li G, Xi F, Dong X. Synthesis of Mn-intercalated layered titanate by exfoliation–flocculation approach and its efficient photocatalytic activity under visible–light. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2012.06.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kim IY, Lee JM, Kim TW, Kim HN, Kim HI, Choi W, Hwang SJ. A strong electronic coupling between graphene nanosheets and layered titanate nanoplates: a soft-chemical route to highly porous nanocomposites with improved photocatalytic activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:1038-1048. [PMID: 22323425 DOI: 10.1002/smll.201101703] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 10/24/2011] [Indexed: 05/31/2023]
Abstract
Strongly coupled nanocomposites of layered titanate and reduced graphene oxide (RGO) are synthesized by electrostatically derived self-assembly between negatively charged RGO nanosheets and positively charged TiO(2) nanosols, which is then followed by a phase transition of the anatase TiO(2) component into layered titanate. The resulting nanocomposite consists of thin 2D nanoplates of lepidocrocite-type layered titanate immobilized on the surface of RGO nanosheets. The composite formation with RGO nanosheets is effective not only in promoting the phase transition of anatase TiO(2) nanosols, but also in improving the thermal stability of the layered titanate, indicating the role of RGO nanosheets as an agent for directing and stabilizing layered structures. The layered-titanate-RGO nanocomposites exhibit remarkably expanded surface area with the formation of micropores and mesopores. The composite formation with RGO nanosheets gives rise to the disappearance of the reflectance edge of layered titanate in the diffuse reflectance UV-vis spectra, indicating a strong electronic coupling between the RGO and layered titanate. The strong electronic correlation between the two components is further evidenced by the visible-light-induced generation of photocurrents after the hybridization with RGO. The layered-titanate-RGO nanocomposite shows a higher activity for the photodegradation of organic molecules than uncomposited layered titanate, underscoring the usefulness of graphene hybridization in improving the photocatalyst performance of layered titanate. The experimental findings presented here clearly demonstrate that the self-assembly of metal oxide nanoparticles with RGO 2D nanosheets is quite effective not only in synthesizing porous metal-oxide-graphene nanocomposites with improved photo-induced functionality, but also in achieving strong electronic coupling between RGO and metal oxides.
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Affiliation(s)
- In Young Kim
- Center for Intelligent Nano-Bio Materials (CINBM), Department of Chemistry and Nano Sciences, Ewha Womans University, Seoul 120-750, Korea
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Kim HN, Kim TW, Choi KH, Kim IY, Kim YR, Hwang SJ. Self-Assembly of Nanosized 0D Clusters: CdS Quantum Dot-Polyoxotungstate Nanohybrids with Strongly Coupled Electronic Structures and Visible-Light-Active Photofunctions. Chemistry 2011; 17:9626-33. [DOI: 10.1002/chem.201100583] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Indexed: 11/10/2022]
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Ren J, Wang W, Shang M, Sun S, Gao E. Heterostructured bismuth molybdate composite: preparation and improved photocatalytic activity under visible-light irradiation. ACS APPLIED MATERIALS & INTERFACES 2011; 3:2529-2533. [PMID: 21675753 DOI: 10.1021/am200393h] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A heterostructured photocatalyst containing the same Bi, Mo, and O elements (Bi(3.64)Mo(0.36)O(6.55)/Bi(2)MoO(6)) was realized by a facile hydrothermal method. The heterostructured composite was characterized by powder X-ray diffraction, selected-area electron diffraction, scanning electron microscopy, and high-resolution electron microscopy. The Bi(3.64)Mo(0.36)O(6.55)/Bi(2)MoO(6) composite exhibited notable enhanced photocatalytic activity compared to Bi(2)MoO(6) or Bi(3.64)Mo(0.36)O(6.55) in the photocatalytic degradation of rhodamine B and phenol under visible-light irradiation. More interestingly, it is found that the heterostructured composite could mineralize organic substances into CO(2) efficiently. This study offered a clue for the design of an efficient photocatalyst in the application of environmental treatment.
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Affiliation(s)
- Jia Ren
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China
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Paek SM, Oh JM, Choy JH. A Lattice-Engineering Route to Heterostructured Functional Nanohybrids. Chem Asian J 2010; 6:324-38. [DOI: 10.1002/asia.201000578] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Indexed: 01/11/2023]
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