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DeMarco M, Ballard M, Grage E, Nourigheimasi F, Getter L, Shafiee A, Ghadiri E. Enhanced photochemical activity and ultrafast photocarrier dynamics in sustainable synthetic melanin nanoparticle-based donor-acceptor inkjet-printed molecular junctions. NANOSCALE 2023; 15:14346-14364. [PMID: 37602764 DOI: 10.1039/d3nr02387g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
Melanin is a stable, widely light-absorbing, photoactive, and biocompatible material viable for energy conversion, photocatalysis, and bioelectronic applications. To achieve multifunctional nanostructures, we synthesized melanin nanoparticles of uniform size and controlled chemical composition (dopamelanin and eumelanin) and used them with titanium dioxide to fabricate donor-acceptor bilayers. Their size enhances the surface-to-volume ratio important for any surface-mediated functionality, such as photocatalysis, sensing, and drug loading and release, while controlling their chemical composition enables to control the film's functionality and reproducibility. Inkjet printing uniquely allowed us to control the deposited amount of materials with minimum ink waste suitable for reproducible materials deposition. We studied the photochemical characteristics of the donor-acceptor melanin-TiO2 nanostructured films via photocatalytic degradation of methylene blue dye under selective UV-NIR and Vis-NIR irradiation conditions. Under both irradiation conditions, they exhibited photocatalytic characteristics superior to pure melanin and, under UV-NIR irradiation, superior to TiO2 alone; TiO2 is photoactive only under UV irradiation. The enhanced photocatalytic characteristics of the melanin-TiO2 nanostructured bilayer films, particularly when excited by visible light, point to charge separation at the melanin-TiO2 interface as a possible mechanism. We performed ultrafast laser spectroscopy to investigate the photochemical characteristics of pure melanin and the melanin-TiO2 constructs and found that their time-resolved photoexcited spectral patterns differ. We performed singular value decomposition analysis to quantitatively deconvolute and compare the dynamics of photochemical processes for melanin and melanin-TiO2 heterostructures. This observation supports electronic interactions, namely, interfacial charge separation at the melanin and TiO2 interface. The excited-state relaxation in melanin-TiO2 increases markedly from 5 ps to 400 ps. The results are remarkable for the future intriguing application of melanin-based constructs for bioelectronics and energy conversion.
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Affiliation(s)
- Max DeMarco
- Chemistry Department, Wake Forest University, USA.
- Center for Functional Materials, Wake Forest University, USA
| | - Matthew Ballard
- Chemistry Department, Wake Forest University, USA.
- Center for Functional Materials, Wake Forest University, USA
| | - Elinor Grage
- Chemistry Department, Wake Forest University, USA.
- Center for Functional Materials, Wake Forest University, USA
| | - Farnoush Nourigheimasi
- Chemistry Department, Wake Forest University, USA.
- Center for Functional Materials, Wake Forest University, USA
| | - Lillian Getter
- Chemistry Department, Wake Forest University, USA.
- Center for Functional Materials, Wake Forest University, USA
| | - Ashkan Shafiee
- Wake Forest School of Medicine, Wake Forest University, USA
- Center for Functional Materials, Wake Forest University, USA
| | - Elham Ghadiri
- Chemistry Department, Wake Forest University, USA.
- Wake Forest School of Medicine, Wake Forest University, USA
- Center for Functional Materials, Wake Forest University, USA
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Inkjet Printing of Synthesized Melanin Nanoparticles as a Biocompatible Matrix for Pharmacologic Agents. NANOMATERIALS 2020; 10:nano10091840. [PMID: 32942599 PMCID: PMC7558123 DOI: 10.3390/nano10091840] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 12/11/2022]
Abstract
Melanin is a natural biopigment that is produced by melanocytes and can be found in most living organisms. The unique physical and chemical properties of melanin render it potentially useful for numerous applications, particularly those in which a biocompatible functional material is required. Herein, we introduce one important technology in which melanin can be utilized: a drug delivery system in terms of a biocompatible matrix. However, extracting melanin from different biological sources is costly and time-consuming and introduces variabilities in terms of chemical structure, properties, and functions. Hence, a functionally reproducible system is hard to achieve using biologically extracted melanin. Here we report the synthesis of melanin nanoparticles of controlled uniform sizes and chemical characteristics. The optical, chemical, and structural characteristics of synthesized nanoparticles were characterized by optical confocal photoluminescence (PL) imaging, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and Zeta potentiometry. The melanin nanoparticles have 100 nm size and a narrow size distribution. The advantage of a nanoparticle structure is its enhanced surface-to-volume ratio compared to bulk pigments, which is important for applications in which controlling the microscopic surface area is essential. Using the inkjet printing technique, we developed melanin thin films with minimum ink waste and loaded them with methylene blue (our representative drug) to test the drug-loading ability of the melanin nanoparticles. Inkjet printing allowed us to create smooth uniform films with precise deposition and minimum ink-waste. The spectroscopic analysis confirmed the attachment of the "drug" onto the melanin nanoparticles as a matrix. Hence, our data identify melanin as a material system to integrate into drug release applications.
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3
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Kavan L. Conduction band engineering in semiconducting oxides (TiO2, SnO2): Applications in perovskite photovoltaics and beyond. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Maitani MM, Tateyama A, Boix PP, Han G, Nitta A, Ohtani B, Mathews N, Wada Y. Effects of energetics with {001} facet-dominant anatase TiO2 scaffold on electron transport in CH3NH3PbI3 perovskite solar cells. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Huang KY, Luo YH, Cheng HM, Tang J, Huang JH. Performance Enhancement of CdS/CdSe Quantum Dot-Sensitized Solar Cells with (001)-Oriented Anatase TiO 2 Nanosheets Photoanode. NANOSCALE RESEARCH LETTERS 2019; 14:18. [PMID: 30635791 PMCID: PMC6329687 DOI: 10.1186/s11671-018-2842-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 12/18/2018] [Indexed: 06/09/2023]
Abstract
CdS/CdSe quantum dot-sensitized solar cells (QDSSCs) were fabricated on two types of TiO2 photoanodes, namely nanosheets (NSs) and nanoparticles. The TiO2 NSs with high (001)-exposed facets were prepared via a hydrothermal method, while the TiO2 nanoparticles used the commercial Degussa P-25. It was found that the pore size, specific surface area, porosity, and electron transport properties of TiO2 NSs were generally superior to those of P-25. As a result, the TiO2 NS-based CdS/CdSe QDSSC has exhibited a power conversion efficiency of 4.42%, which corresponds to a 54% improvement in comparison with the P-25-based reference cell. This study provides an effective photoanode design using nanostructure approach to improve the performance of TiO2-based QDSSCs.
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Affiliation(s)
- Kuo-Yen Huang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 300 Taiwan
| | - Yi-Hsiang Luo
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 300 Taiwan
| | - Hsin-Ming Cheng
- Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei, 115 Taiwan
| | - Jau Tang
- Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei, 115 Taiwan
| | - Jin-Hua Huang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 300 Taiwan
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6
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Ferdowsi P, Saygili Y, Zakeeruddin SM, Mokhtari J, Grätzel M, Hagfeldt A, Kavan L. Alternative bases to 4-tert-butylpyridine for dye-sensitized solar cells employing copper redox mediator. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.01.142] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Maitani MM, Tanaka K, Satou H, Wada Y. Effects of {001} Facet of Anatase TiO 2 Single-crystalline Nanosheets on Photoexcited Electron Transfer from Near-infrared Dye-sensitizer. CHEM LETT 2017. [DOI: 10.1246/cl.170718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masato M. Maitani
- Research Centre for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552
| | - Keita Tanaka
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552
| | - Hirokazu Satou
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552
| | - Yuji Wada
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552
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Maitani MM, Tanaka K, Shen Q, Toyoda T, Wada Y. Electron transport properties in dye-sensitized solar cells with {001} facet-dominant TiO 2 nanoparticles. Phys Chem Chem Phys 2017; 19:22129-22140. [PMID: 28795712 DOI: 10.1039/c7cp03593d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Dye-sensitized solar cells (DSSCs) with reactive {001} facet-dominant TiO2 have attracted a great deal of attention owing to their high solar cell performance, despite the origin and the variation of the results being controversial. Here, we report the characteristic charge transport properties of DSSCs composed of {001} and {101} facet-dominant TiO2 nanoparticles in order to explain the origin of solar cell performance. Based on transient photocurrent and photovoltage measurements and transient absorption spectroscopy, the energetics of TiO2 semiconductors and dye sensitizers are utilized to understand the electron diffusion, recombination, and injection kinetics to determine solar cell performance. Novel strategies to improve DSSC performance by utilizing the characteristics of {001} facet-dominant TiO2 nanoparticles are proposed, which are (1) enhancement of electron injection and (2) reduction of carrier recombination for JSC and VOC improvement, despite the drawback of slower electron diffusion in the mesoporous network of {001} facet-dominant TiO2.
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Affiliation(s)
- M M Maitani
- School of Chemical Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan.
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9
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Jiang L, Sun L, Yang D, Zhang J, Li YJ, Zou K, Deng WQ. Niobium-Doped (001)-Dominated Anatase TiO 2 Nanosheets as Photoelectrode for Efficient Dye-Sensitized Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:9576-9583. [PMID: 28117574 DOI: 10.1021/acsami.6b14147] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
TiO2 nanocrystals with different reactive facets have attracted extensive interest since they were first synthesized. The anatase TiO2 nanocrystals with (001) or (100) dominate facets were considered to be excellent electrode materials to enhance the cell performance of dye-sensitized solar cells. However, which reactive facet presents the best surface for benefiting photovoltaic effect is still unknown. We report a systematic study of various anatase TiO2 surfaces interacting with N719 dye by means of density functional theory calculations in combination with microscopic techniques. The (001) surface interacting with N719 would have the lowest work function, leading to the best photovoltaic performances. To further increase the efficiency, Nb dopant was incorporated into the anatase TiO2 nanocrystals. Based on the theoretical prediction, we proposed and demonstrated novel Nb-doped (001)-dominated anatase TiO2 nanosheets as photoelectrode in a dye-sensitized solar cell to further enhance the open-circuit voltage. And a power conversion efficiency of 10% was achieved, which was 22% higher than that of the undoped device (P25 as an electrode).
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Affiliation(s)
- Lei Jiang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Lei Sun
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Dong Yang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Jian Zhang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Ya-Juan Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Kun Zou
- Hubei Key Laboratory of Natural Products Research and Development, College of Chemistry and Life Sciences, Three Gorges University , Yichang 443002, China
| | - Wei-Qiao Deng
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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11
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Li M, Li M, Liu X, Bai L, Luoshan M, Lei W, Wang Z, Zhu Y, Zhao X. Performance optimization of dye-sensitized solar cells by multilayer gradient scattering architecture of TiO 2 microspheres. NANOTECHNOLOGY 2017; 28:035201. [PMID: 27928996 DOI: 10.1088/1361-6528/28/3/035201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
TiO2 microspheres (TMSs) with unique hierarchical structure and unusual high specific surface area are synthesized and incorporated into a photoanode in various TMS multilayer gradient architectures to form novel photoanodes and dye-sensitized solar cells (DSSCs). Significant influences of these architectures on the photoelectric properties of DSSCs are obtained. The DSSC with the optimal TMS gradient-ascent architecture of M036 has the largest amounts of dye absorption, strongest light absorption, longest electron lifetime and lowest electron recombination, and thus exhibits the maximum short circuit current density (Jsc) of 16.49 mA cm-2 and photoelectric conversion efficiency (η) of 7.01%, notably higher than those of conventional DSSCs by 21% and 22%, respectively. These notable improvements in the properties of DSSCs can be attributed to the TMS gradient-ascent architecture of M036 which can most effectively increase dye absorption and localize incident light within the photoanode by the light scattering of TMSs, and thus utilize the incident light thoroughly. This study provides an optimized and universal configuration for the scattering microspheres incorporated in the hybrid photoanode, which can significantly improve the performance of DSSCs.
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Affiliation(s)
- Mingyue Li
- School of Physics and Technology, and the Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China
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12
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Maitani MM, Tanaka K, Satou H, Oshima T, Ohtomo A, Wada Y. Hetero-epitaxial growth control of single-crystalline anatase TiO2 nanosheets predominantly exposing the {001} facet on oriented crystalline substrates. CrystEngComm 2017. [DOI: 10.1039/c7ce00754j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Well-controlled TiO2 nanosheet growth was achieved by applying a proper crystalline orientation of substrates as a hetero-epitaxial growth strategy.
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Affiliation(s)
- M. M. Maitani
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - K. Tanaka
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - H. Satou
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - T. Oshima
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - A. Ohtomo
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Y. Wada
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
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13
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Deák P, Kullgren J, Aradi B, Frauenheim T, Kavan L. Water splitting and the band edge positions of TiO2. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.03.122] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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In situ Raman spectroelectrochemistry as a useful tool for detection of TiO2(anatase) impurities in TiO2(B) and TiO2(rutile). MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1678-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Electron Kinetics in Dye Sensitized Solar Cells Employing Anatase with (101) and (001) Facets. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.02.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Watkins KJ, Parkinson BA, Spitler MT. Physical Models for Charge Transfer at Single Crystal Oxide Semiconductor Surfaces as Revealed by the Doping Density Dependence of the Collection Efficiency of Dye Sensitized Photocurrents. J Phys Chem B 2015; 119:7579-88. [PMID: 25742318 DOI: 10.1021/jp511438j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Kevin J. Watkins
- Department
of Chemistry and School of Energy Resources, University of Wyoming, Laramie, Wyoming 82071, United States
| | - B. A. Parkinson
- Department
of Chemistry and School of Energy Resources, University of Wyoming, Laramie, Wyoming 82071, United States
| | - M. T. Spitler
- Office
of Science, SC 22.13, Department of Energy, Washington, DC 20585, United States
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17
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Roy N, Park Y, Sohn Y, Leung KT, Pradhan D. Green synthesis of anatase TiO(2) nanocrystals with diverse shapes and their exposed facets-dependent photoredox activity. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16498-16507. [PMID: 25188808 DOI: 10.1021/am504084p] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The exposed facets of a crystal are known to be one of the key factors to its physical, chemical and electronic properties. Herein, we demonstrate the role of amines on the controlled synthesis of TiO2 nanocrystals (NCs) with diverse shapes and different exposed facets. The chemical, physical and electronic properties of the as-synthesized TiO2 NCs were evaluated and their photoredox activity was tested. It was found that the intrinsic photoredox activity of TiO2 NCs can be enhanced by controlling the chemical environment of the surface, i.e.; through morphology evolution. In particular, the rod shape TiO2 NCs with ∼25% of {101} and ∼75% of {100}/{010} exposed facets show 3.7 and 3.1 times higher photocatalytic activity than that of commercial Degussa P25 TiO2 toward the degradation of methyl orange and methylene blue, respectively. The higher activity of the rod shape TiO2 NCs is ascribed to the facetsphilic nature of the photogenerated carriers within the NCs. The photocatalytic activity of TiO2 NCs are found to be in the order of {101}+{100}/{010} (nanorods) > {101}+{001}+{100}/{010} (nanocuboids and nanocapsules) > {101} (nanoellipsoids) > {001} (nanosheets) providing the direct evidence of exposed facets-depended photocatalytic activity.
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Affiliation(s)
- Nitish Roy
- Materials Science Centre, Indian Institute of Technology , Kharagpur 721 302, W.B. India
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18
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Solvothermal synthesis and photocatalytic performance of Mg2+-doped anatase nanocrystals with exposed {001} facets. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.11.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Mansfeldova V, Laskova B, Krysova H, Zukalova M, Kavan L. Synthesis of nanostructured TiO2 (anatase) and TiO2(B) in ionic liquids. Catal Today 2014. [DOI: 10.1016/j.cattod.2014.01.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Nano-p–n junction heterostructures enhanced TiO2 nanobelts biosensing electrode. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2524-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Effects of water-based gel electrolyte on the charge recombination and performance of dye-sensitized solar cells. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2508-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Liu G, Yang HG, Pan J, Yang YQ, Lu GQ(M, Cheng HM. Titanium Dioxide Crystals with Tailored Facets. Chem Rev 2014; 114:9559-612. [DOI: 10.1021/cr400621z] [Citation(s) in RCA: 815] [Impact Index Per Article: 81.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Gang Liu
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Hua Gui Yang
- Key
Laboratory for Ultrafine Materials of Ministry of Education, School
of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Centre
for Clean Environment and Energy, Gold Coast Campus, Griffith University, Queensland 4222, Australia
| | - Jian Pan
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
- ARC
Centre of Excellence for Functional Nanomaterials, Australian Institute
for Bioengineering and Nanotechnology, The University of Queensland, Queensland 4072, Australia
| | - Yong Qiang Yang
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
- Department of Materials Science & Technology, School of Chemistry and Materials Science, University of Science and Technology of China, 96 Jinzhai Road, HeFei 230026, China
| | - Gao Qing (Max) Lu
- ARC
Centre of Excellence for Functional Nanomaterials, Australian Institute
for Bioengineering and Nanotechnology, The University of Queensland, Queensland 4072, Australia
| | - Hui-Ming Cheng
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
- Chemistry
Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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O'Rourke C, Bowler DR. DSSC anchoring groups: a surface dependent decision. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:195302. [PMID: 24762339 DOI: 10.1088/0953-8984/26/19/195302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Electrodes in dye sensitised solar cells are typically nanocrystalline anatase TiO2 with a majority (1 0 1) surface exposed. Generally the sensitising dye employs a carboxylic anchoring moiety through which it adheres to the TiO₂ surface. Recent interest in exploiting the properties of differing TiO₂ electrode morphologies, such as rutile nanorods exposing the (1 1 0) surface and anatase electrodes with high percentages of the (0 0 1) surface exposed, begs the question of whether this anchoring strategy is best, irrespective of the majority surface exposed. Here we address this question by presenting density functional theory calculations contrasting the binding properties of two promising anchoring groups, phosphonic acid and boronic acid, to that of carboxylic acid. Anchor-electrode interactions are studied for the prototypical anatase (1 0 1) surface, along with the anatase (0 0 1) and rutile (1 1 0) surfaces. Finally the effect of using these alternative anchoring groups to bind a typical coumarin dye (NKX-2311) to these TiO₂ substrates is examined. Significant differences in the binding properties are found depending on both the anchor and surface, illustrating that the choice of anchor is necessarily dependent upon the surface exposed in the electrode. In particular the boronic acid is found to show the potential to be an excellent anchor choice for electrodes exposing the anatase (0 0 1) surface.
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Affiliation(s)
- C O'Rourke
- London Centre for Nanotechnology, 17-19 Gordon St, WC1H 0AH, London. Department of Physics & Astronomy, University College London, Gower St, WC1E 6BT, London. UCL Satellite, International Centre for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Kavan L, Yum JH, Graetzel M. Graphene-based cathodes for liquid-junction dye sensitized solar cells: Electrocatalytic and mass transport effects. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.08.112] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Zhong P, Liao Y, Que W, Jia Q, Lei T. Enhanced electron collection in photoanode based on ultrafine TiO2 nanotubes by a rapid anodization process. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2463-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Lithium insertion into TiO2 (anatase): electrochemistry, Raman spectroscopy, and isotope labeling. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2435-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Wang W, Zhang H, Wang R, Feng M, Chen Y. Design of a TiO2 nanosheet/nanoparticle gradient film photoanode and its improved performance for dye-sensitized solar cells. NANOSCALE 2014; 6:2390-6. [PMID: 24435106 DOI: 10.1039/c3nr05967g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A TiO2 film photoanode with gradient structure in nanosheet/nanoparticle concentration on the fluorine-doped tin oxide glass from substrate to surface was prepared by a screen printing method. The as-prepared dye-sensitized solar cell (DSSC) based on the gradient film electrode exhibited an enhanced photoelectric conversion efficiency of 6.48%, exceeding that of a pure nanoparticle-based DSSC with the same film thickness by a factor of 2.6. The enhanced photovoltaic performance of the gradient film-based DSSC was attributed to the superior light scattering ability of TiO2 nanosheets within the gradient structure, which was beneficial to light harvesting. Furthermore, the TiO2 nanosheets with exposed {001} facets facilitated the electron transport from dye molecules to the conduction band of TiO2 and further to the conductive glass. Meanwhile, the high specific surface area of TiO2 nanosheets helped the adsorption of dye molecules, and the TiO2 nanoparticle underlayer ensured good electronic contact between the TiO2 film and the fluorine-doped tin oxide glass substrate. The electrochemical impedance spectroscopy measurements further confirmed the electron transport differences between DSSCs based on nanosheet/nanoparticle gradient film electrodes and DSSCs based on nanosheet/nanoparticle homogeneous mixtures, pure TiO2 nanoparticles and pure TiO2 nanosheets with the same film thickness.
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Affiliation(s)
- Wenguang Wang
- School of Materials and Energy, Guangdong University of Technology, Guangzhou Higher Education Mega Center 100#, Guangzhou, 510006, P. R. China.
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Maitani MM, Zhan C, Mochizuki D, Suzuki E, Wada Y. The pH-depending enhancement of electron transfer by {001} facet-dominating TiO2 nanoparticles for photocatalytic H2 evolution under visible irradiation. Catal Sci Technol 2014. [DOI: 10.1039/c3cy00982c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Effect of single-wall carbon nanotubes on the properties of polymeric gel electrolyte dye-sensitized solar cells. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2302-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pastore M, De Angelis F. Intermolecular Interactions in Dye-Sensitized Solar Cells: A Computational Modeling Perspective. J Phys Chem Lett 2013; 4:956-74. [PMID: 26291363 DOI: 10.1021/jz302147v] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We present a unified overview of our recent activity on the modeling of relevant intermolecular interactions occurring in dye-sensitized solar cells (DSCs). The DSC is an inherent complex system, whose efficiency is essentially determined by the interrelated phenomena occurring at the multiple molecular-semiconductor-electrolyte heterointerfaces. In this Perspective, we illustrate the basic methodology and selected applications of computational modeling of dye-dye and dye-coadsorbent intermolecular interactions taking place at the dye-sensitized interface. We show that the proposed methodology offers a realistic picture of aggregation phenomena among surface-adsorbed dyes and nicely describes semiconductor surfaces cosensitized by different dyes. The information acquired from this type of studies might constitute the basis for an integrated multiscale computational description of the device functioning, including all of the possible interdependencies among the device constituents, which may further boost the DSCs efficiency. We believe that this direction should be the target of future computational research in the DSC field.
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Affiliation(s)
- Mariachiara Pastore
- Computational Laboratory for Hybrid Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Molecolari, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Filippo De Angelis
- Computational Laboratory for Hybrid Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Molecolari, via Elce di Sotto 8, I-06123 Perugia, Italy
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Kavan L. Exploiting Nanocarbons in Dye-Sensitized Solar Cells. MAKING AND EXPLOITING FULLERENES, GRAPHENE, AND CARBON NANOTUBES 2013; 348:53-93. [DOI: 10.1007/128_2013_447] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Li H, Zeng Y, Huang T, Piao L, Liu M. Controlled Synthesis of Anatase TiO2Single Crystals with Dominant {001} Facets from TiO2Powders. Chempluschem 2012. [DOI: 10.1002/cplu.201200158] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Martsinovich N, Troisi A. How TiO2 crystallographic surfaces influence charge injection rates from a chemisorbed dye sensitiser. Phys Chem Chem Phys 2012; 14:13392-401. [DOI: 10.1039/c2cp42055d] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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