3151
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Synthesis of Nanocrystalline InVO 4 by Hydrothermal Process and its Visible-Light Photocatalytic Activity. ACTA ACUST UNITED AC 2011. [DOI: 10.4028/www.scientific.net/amr.284-286.734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monophasic orthorhombic InVO4 was synthesized using InCl3 and NH4VO3 as starting materials by a hydrothermal approach. The as-prepared InVO4 product was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible diffuse reflectance spectroscopy (DRS). It was found that the as-prepared InVO4 shows strong visible-light absorption with absorption onset of 515 nm, indicating a narrow optical band gap of 2.4 eV. Furthermore, the as-prepared InVO4 shows high visible-light photocatalytic activity for decomposition of methyl orange, which is ascribed to the strong visible-light absorption.
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3152
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Abstract
The LaFeO3 nanoparticle was synthesized using Fe(NO3)3 and La(NO3)3 as starting materials by homogeneous precipitation method. The as-prepared LaFeO3 product was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible diffuse reflectance spectroscopy (DRS). XRD and SEM demonstrate the successful synthesis of single phase perovskite LaFeO3 and with 60-80 nm particle size. It was found that the as-prepared LaFeO3 shows strong visible-light absorption with absorption onset of 532 nm, indicating a narrow optical band gap of 2.33 eV. Furthermore, the as-prepared LaFeO3 shows high visible-light photocatalytic activity for decomposition of methylene blue in comparison with the commercial Degussa P25.
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3153
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Wu MC, Hiltunen J, Sápi A, Avila A, Larsson W, Liao HC, Huuhtanen M, Tóth G, Shchukarev A, Laufer N, Kukovecz Á, Kónya Z, Mikkola JP, Keiski R, Su WF, Chen YF, Jantunen H, Ajayan PM, Vajtai R, Kordás K. Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen. ACS NANO 2011; 5:5025-30. [PMID: 21568315 DOI: 10.1021/nn201111j] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the synthesis of N-doped TiO(2) nanofibers and high photocatalytic efficiency in generating hydrogen from ethanol-water mixtures under UV-A and UV-B irradiation. Titanate nanofibers synthesized by hydrothermal method are annealed in air and/or ammonia to achieve N-doped anatase fibers. Depending on the synthesis route, either interstitial N atoms or new N-Ti bonds appear in the lattice, resulting in slight lattice expansion as shown by XPS and HR-TEM analysis, respectively. These nanofibers were then used as support for Pd and Pt nanoparticles deposited with wet impregnation followed by calcination and reduction. In the hydrogen generation tests, the N-doped samples were clearly outperforming their undoped counterparts, showing remarkable efficiency not only under UV-B but also with UV-A illumination. When 100 mg of catalyst (N-doped TiO(2) nanofiber decorated with Pt nanoparticles) was applied to 1 L of water-ethanol mixture, the H(2) evolution rates were as high as 700 μmol/h (UV-A) and 2250 μmol/h (UV-B) corresponding to photo energy conversion percentages of ∼3.6 and ∼12.3%, respectively.
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Affiliation(s)
- Ming-Chung Wu
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan
| | | | - András Sápi
- Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
| | | | - William Larsson
- Technical Chemistry, Department of Chemistry, Chemical-Biological Center, Umeå University, SE-901 87 Umeå, Sweden
| | - Hsueh-Chung Liao
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan
| | | | | | - Andrey Shchukarev
- Technical Chemistry, Department of Chemistry, Chemical-Biological Center, Umeå University, SE-901 87 Umeå, Sweden
| | - Noémi Laufer
- Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
| | - Ákos Kukovecz
- Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
| | - Jyri-Pekka Mikkola
- Industrial Chemistry and Reaction Engineering, Process Chemistry, Centre, Åbo Akademi University, Biskopsgata 8 FI-20500 Åbo-Turku, Finland
- Technical Chemistry, Department of Chemistry, Chemical-Biological Center, Umeå University, SE-901 87 Umeå, Sweden
| | | | - Wei-Fang Su
- Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei, Taiwan
| | | | - Pulickel M. Ajayan
- Department of Materials Science and Engineering, Rice University, Houston, Texas 77005, United States
| | - Robert Vajtai
- Department of Materials Science and Engineering, Rice University, Houston, Texas 77005, United States
| | - Krisztián Kordás
- Technical Chemistry, Department of Chemistry, Chemical-Biological Center, Umeå University, SE-901 87 Umeå, Sweden
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3154
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3155
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Schwarz H. Chemistry with methane: concepts rather than recipes. Angew Chem Int Ed Engl 2011; 50:10096-115. [PMID: 21656876 DOI: 10.1002/anie.201006424] [Citation(s) in RCA: 491] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Indexed: 11/11/2022]
Abstract
Four seemingly simple transformations related to the chemistry of methane will be addressed from mechanistic and conceptual points of view: 1) metal-mediated dehydrogenation to form metal carbene complexes, 2) the hydrogen-atom abstraction step in the oxidative dimerization of methane, 3) the mechanisms of the CH(4)→CH(3)OH conversion, and 4) the initial bond scission (C-H vs. O-H) as well as the rate-limiting step in the selective CH(3)OH→CH(2)O oxidation. State-of-the-art gas-phase experiments, in conjunction with electronic-structure calculations, permit identification of the elementary reactions at a molecular level and thus allow us to unravel detailed mechanistic aspects. Where appropriate, these results are compared with findings from related studies in solution or on surfaces.
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Affiliation(s)
- Helmut Schwarz
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany.
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3156
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Shi J, Ye J, Zhou Z, Li M, Guo L. Hydrothermal Synthesis of Na
0.5
La
0.5
TiO
3
–LaCrO
3
Solid‐Solution Single‐Crystal Nanocubes for Visible‐Light‐Driven Photocatalytic H
2
Evolution. Chemistry 2011; 17:7858-67. [DOI: 10.1002/chem.201003755] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Jinwen Shi
- State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), Xi'an, Shaanxi 710049 (China), Fax: (+86) 29‐8266‐9033
- Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047 (Japan), Fax: (+81) 29‐859‐2301
| | - Jinhua Ye
- Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047 (Japan), Fax: (+81) 29‐859‐2301
| | - Zhaohui Zhou
- State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), Xi'an, Shaanxi 710049 (China), Fax: (+86) 29‐8266‐9033
| | - Mingtao Li
- State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), Xi'an, Shaanxi 710049 (China), Fax: (+86) 29‐8266‐9033
| | - Liejin Guo
- State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), Xi'an, Shaanxi 710049 (China), Fax: (+86) 29‐8266‐9033
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3157
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Mukherji A, Seger B, Lu GQM, Wang L. Nitrogen doped Sr₂Ta₂O₇ coupled with graphene sheets as photocatalysts for increased photocatalytic hydrogen production. ACS NANO 2011; 5:3483-92. [PMID: 21488687 DOI: 10.1021/nn102469e] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this work we present the synthesis of a new type of nitrogen-doped tantalate, Sr(2)Ta(2)O(7-x)N(x), which exhibited significantly increased visible light absorption and improved photocatalytic hydrogen production by 87% under solar irradiation, compared with its undoped counterpart Sr(2)Ta(2)O(7). The photocatalyst also exhibited a strong capability in photoinduced reduction of exfoliated graphene oxide (GO) to graphene sheets. By using graphene as a support for a Pt cocatalyst, a new type of composite containing graphene-Pt and Sr(2)Ta(2)O(7-x)N(x) was designed, which demonstrated an additional ∼80% increase in hydrogen production and an quantum efficiency of 6.45% (∼177% increase from pristine undoped Sr(2)Ta(2)O(7)) due to the efficient charge carrier separation on the photocatalyst. This work suggests that graphene can play an important role as an electron transfer highway, which facilitates the charge carrier collection onto Pt cocatalysts. The method can thus be considered as an excellent strategy to increase photocatalytic hydrogen production in addition to a commonly applied doping method.
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Affiliation(s)
- Aniruddh Mukherji
- ARC Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, QLD 4072 Australia
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3158
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Yun HJ, Lee H, Kim ND, Lee DM, Yu S, Yi J. A combination of two visible-light responsive photocatalysts for achieving the Z-scheme in the solid state. ACS NANO 2011; 5:4084-4090. [PMID: 21500836 DOI: 10.1021/nn2006738] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The light reaction in natural photosynthesis is generally recognized as one of the most efficient mechanisms for converting solar energy into other energy sources. We report herein on a novel strategy for generating H(2) fuel via an artificial Z-scheme mechanism by mimicking the natural photosynthesis that occurs in green plants. Designing a desirable photocatalyst by mimicking the Z-scheme mechanism leads to a conduction band that is sufficiently high to reduce protons, thus decreasing the probability of charge recombination. We combined two visible light sensitive photocatalysts, CdS and carbon-doped TiO(2), with different band structures. The used of this combination, that is, CdS/Au/TiO(1.96)C(0.04), resulted in the successful transfer of photogenerated electrons to a higher energy level in the form of the letter 'Z'. The system produced about a 4 times higher amount of H(2) under irradiation by visible light than CdS/Au/TiO(2). The findings reported herein describe an innovative route to harvesting energy by mimicking natural photosynthesis, and is independent of fossil fuels.
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Affiliation(s)
- Hyeong Jin Yun
- World Class University Program of Chemical Convergence for Energy & Environment, Institute of Chemical Processes, School of Chemical and Biological Engineering, Seoul National University, Seoul 151-741, Republic of Korea
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3159
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Qi L, Yu J, Jaroniec M. Preparation and enhanced visible-light photocatalytic H2-production activity of CdS-sensitized Pt/TiO2 nanosheets with exposed (001) facets. PHYSICAL CHEMISTRY CHEMICAL PHYSICS : PCCP 2011; 13:8915-8923. [PMID: 21678582 DOI: 10.1021/jp200953k] [Citation(s) in RCA: 641] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
CdS-sensitized Pt/TiO(2) nanosheets with exposed (001) facets were prepared by hydrothermal treatment of a Ti(OC(4)H(9))(4)-HF-H(2)O mixed solution followed by photochemical reduction deposition of Pt nanoparticles (NPs) on TiO(2) nanosheets (TiO(2) NSs) and chemical bath deposition of CdS NPs on Pt/TiO(2) NSs, successively. The UV and visible-light driven photocatalytic activity of the as-prepared samples was evaluated by photocatalytic H(2) production from lactic acid aqueous solution under UV and visible-light (λ ≥ 420 nm) irradiation. It was shown that no photocatalytic H(2)-production activity was observed on the pure TiO(2) NSs under UV and/or visible-light irradiation. Deposition of CdS NPs on Pt/TiO(2) NSs caused significant enhancement of the UV and visible-light photocatalytic H(2)-production rates. The morphology of TiO(2) particles had also significant influence on the visible-light H(2)-production activity. Among TiO(2) NSs, P25 and the NPs studied, the CdS-sensitized Pt/TiO(2) NSs show the highest photocatalytic activity (13.9% apparent quantum efficiency obtained at 420 nm), exceeding that of CdS-sensitized Pt/P25 by 10.3% and that of Pt/NPs by 1.21%, which can be attributed to the combined effect of several factors including the presence of exposed (001) facets, surface fluorination and high specific surface area. After many replication experiments of the photocatalytic hydrogen production in the presence of lactic acid, the CdS-sensitized Pt/TiO(2) NSs did not show great loss in the photocatalytic activity, confirming that the CdS/Pt/TiO(2) NSs system is stable and not photocorroded.
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Affiliation(s)
- Lifang Qi
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122#, Wuhan 430070, PR China
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3160
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Tada H, Fujishima M, Kobayashi H. Photodeposition of metal sulfide quantum dots on titanium(IV) dioxide and the applications to solar energy conversion. Chem Soc Rev 2011; 40:4232-43. [PMID: 21566829 DOI: 10.1039/c0cs00211a] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Heteronanojunction systems consisting of narrow gap semiconductors represented by metal sulfides and TiO(2) are highly expected as visible-light-active photocatalysts and the key materials for various photoelectrochemical devices. The common central issue is increasing efficiency of the light-induced interfacial electron transfer from the metal sulfide quantum dots (QDs) to TiO(2). We have newly developed simple and versatile low-temperature photodeposition techniques for directly coupling metal sulfide QDs and TiO(2) by taking advantage of its photocatalysis and the photoinduced surface superhydrophilicity. This critical review summarizes the recent developments in the photodeposition techniques and their unique characteristics. Subsequently to the Introduction, a theoretical view of the interfacial electron transfer is presented to obtain the guidelines for the design of the heteronanojunction systems. Then, the itemized description is given for the photodepositions of several kinds of metal sulfides on TiO(2) followed by the summary of the features of the photodeposition technique. Finally, the applications of the resulting heteronanojunction systems to the photocatalysts and QD-sensitized solar cells are described, and the excellent performances are discussed by relating with the features of the photodeposition technique (87 references).
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Affiliation(s)
- Hiroaki Tada
- Department of Applied Chemistry, School of Science and Engineering, Kinki University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan.
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3161
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3162
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Shen S, Chen X, Ren F, Kronawitter CX, Mao SS, Guo L. Solar light-driven photocatalytic hydrogen evolution over ZnIn2S4 loaded with transition-metal sulfides. NANOSCALE RESEARCH LETTERS 2011; 6:290. [PMID: 21711804 PMCID: PMC3211356 DOI: 10.1186/1556-276x-6-290] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 04/05/2011] [Indexed: 05/31/2023]
Abstract
A series of Pt-loaded MS/ZnIn2S4 (MS = transition-metal sulfide: Ag2S, SnS, CoS, CuS, NiS, and MnS) photocatalysts was investigated to show various photocatalytic activities depending on different transition-metal sulfides. Thereinto, CoS, NiS, or MnS-loading lowered down the photocatalytic activity of ZnIn2S4, while Ag2S, SnS, or CuS loading enhanced the photocatalytic activity. After loading 1.0 wt.% CuS together with 1.0 wt.% Pt on ZnIn2S4, the activity for H2 evolution was increased by up to 1.6 times, compared to the ZnIn2S4 only loaded with 1.0 wt.% Pt. Here, transition-metal sulfides such as CuS, together with Pt, acted as the dual co-catalysts for the improved photocatalytic performance. This study indicated that the application of transition-metal sulfides as effective co-catalysts opened up a new way to design and prepare high-efficiency and low-cost photocatalysts for solar-hydrogen conversion.
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Affiliation(s)
- Shaohua Shen
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Xiaobo Chen
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Feng Ren
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | | | - Samuel S Mao
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Liejin Guo
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
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3163
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Li X, Hou Y, Zhao Q, Chen G. Synthesis and photoinduced charge-transfer properties of a ZnFe2O4-sensitized TiO2 nanotube array electrode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:3113-3120. [PMID: 21332125 DOI: 10.1021/la2000975] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
TiO2 nanotube arrays sensitized with ZnFe2O4 nano-crystals were successfully fabricated by a two-step process of anodization and a vacuum-assistant impregnation method followed by annealing. The sample was studied by an environmental scanning electron microscope, a transmission electron microscope, energy-dispersive X-ray analysis, and X-ray diffraction to characterize its morphology and chemical composition. Ultraviolet-visible (UV-vis) absorption spectra and a photoelectrochemical measurement approved that the ZnFe2O4 sensitization enhanced the probability of photoinduced charge separation and extended the range of the photoresponse of TiO2 nanotube arrays from the UV to visible region. In addition, the behaviors of photoinduced charge transfer in a TiO2 nanotube array electrode before and after sensitization by ZnFe2O4 nanocrystals were comparatively studied. The photoluminescence of the TiO2 nanotube array electrode became suppressed, and the surface photovoltage responses on the spectrum were significantly enhanced after the introduction of ZnFe2O4 nanocrystals. The transfer dynamics of the photoinduced charges were observed directly by a transient photovoltage measurement, which revealed a fast charge separation at the interface between ZnFe2O4 nanocrystals and TiO2 nanotubes upon light excitation.
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Affiliation(s)
- Xinyong Li
- Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), and State Key Laboratory of Fine Chemical, School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, People's Republic of China
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3164
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Cao L, Sahu S, Anilkumar P, Bunker CE, Xu J, Fernando KAS, Wang P, Guliants EA, Tackett KN, Sun YP. Carbon Nanoparticles as Visible-Light Photocatalysts for Efficient CO2 Conversion and Beyond. J Am Chem Soc 2011; 133:4754-7. [DOI: 10.1021/ja200804h] [Citation(s) in RCA: 499] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li Cao
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
| | - Sushant Sahu
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
| | - Parambath Anilkumar
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
| | - Christopher E. Bunker
- Propulsion Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Juan Xu
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
| | - K. A. Shiral Fernando
- Sensors Technology Office, University of Dayton Research Institute, Dayton, Ohio 45469, United States
| | - Ping Wang
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
| | - Elena A. Guliants
- Sensors Technology Office, University of Dayton Research Institute, Dayton, Ohio 45469, United States
| | - Kenneth N. Tackett
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
| | - Ya-Ping Sun
- Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, South Carolina 29634, United States
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3165
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(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO2-Based Nanomaterials. ACTA ACUST UNITED AC 2011. [DOI: 10.1155/2011/786759] [Citation(s) in RCA: 239] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
TiO2-based nanomaterials play currently a major role in the development of novel photochemical systems and devices. One of the key parameters determining the photoactivity of TiO2-based materials is the position of the band edges. Although its knowledge is an important prerequisite for understanding and optimizing the performance of photochemical systems, it has been often rather neglected in recent research, particularly in the field of heterogeneous photocatalysis. This paper provides a concise account of main methods for the determination of the position of the band edges, particularly those suitable for measurements on nanostructured materials. In the first part, a survey of key photophysical and photochemical concepts necessary for understanding the energetics at the semiconductor/solution interface is provided. This is followed by a detailed discussion of several electrochemical, photoelectrochemical, and spectroelectrochemical methods that can be applied for the determination of band edge positions in compact and nanocrystalline thin films, as well as in nanocrystalline powders.
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3166
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Efficient photocatalytic hydrogen production over Ni@C/TiO2 nanocomposite under visible light irradiation. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.01.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3167
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Chen X, Liu L, Yu PY, Mao SS. Increasing solar absorption for photocatalysis with black hydrogenated titanium dioxide nanocrystals. Science 2011; 331:746-50. [PMID: 21252313 DOI: 10.1126/science.1200448] [Citation(s) in RCA: 2488] [Impact Index Per Article: 191.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
When used as a photocatalyst, titanium dioxide (TiO(2)) absorbs only ultraviolet light, and several approaches, including the use of dopants such as nitrogen, have been taken to narrow the band gap of TiO(2). We demonstrated a conceptually different approach to enhancing solar absorption by introducing disorder in the surface layers of nanophase TiO(2) through hydrogenation. We showed that disorder-engineered TiO(2) nanocrystals exhibit substantial solar-driven photocatalytic activities, including the photo-oxidation of organic molecules in water and the production of hydrogen with the use of a sacrificial reagent.
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Affiliation(s)
- Xiaobo Chen
- Lawrence Berkeley National Laboratory, University of California at Berkeley, Berkeley, CA 94720, USA
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3168
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SAGAWA T. Efficient Photoinduced Electron Transfer Using TiO2 Doped Polymer. KOBUNSHI RONBUNSHU 2011. [DOI: 10.1295/koron.68.307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3169
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Yan S, Wan L, Li Z, Zou Z. Facile temperature-controlled synthesis of hexagonal Zn2GeO4nanorods with different aspect ratios toward improved photocatalytic activity for overall water splitting and photoreduction of CO2. Chem Commun (Camb) 2011; 47:5632-4. [DOI: 10.1039/c1cc10513b] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zn2GeO4 with dominant {110} facets nanorods exhibit a high activity and selectivity for the photoreduction of CO2 into CO.
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Affiliation(s)
- Shicheng Yan
- Eco-Materials and Renewable Energy Research Center (ERERC)
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Lijuan Wan
- Eco-Materials and Renewable Energy Research Center (ERERC)
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Zhaosheng Li
- Eco-Materials and Renewable Energy Research Center (ERERC)
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Zhigang Zou
- Eco-Materials and Renewable Energy Research Center (ERERC)
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
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3170
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Dong F, Ho WK, Lee SC, Wu Z, Fu M, Zou S, Huang Y. Template-free fabrication and growth mechanism of uniform (BiO)2CO3 hierarchical hollow microspheres with outstanding photocatalytic activities under both UV and visible light irradiation. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11840d] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3171
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Lu J, Dai Y, Jin H, Huang B. Effective increasing of optical absorption and energy conversion efficiency of anatase TiO2 nanocrystals by hydrogenation. Phys Chem Chem Phys 2011; 13:18063-8. [DOI: 10.1039/c1cp22726b] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3172
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Cao X, Jing W, Xing W, Fan Y, Kong Y, Dong J. Fabrication of a visible-light response mesoporous TiO2 membrane with superior water permeability via a weak alkaline sol–gel process. Chem Commun (Camb) 2011; 47:3457-9. [DOI: 10.1039/c0cc04808a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3173
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Ajayakumar G, Kobayashi M, Masaoka S, Sakai K. Light-induced charge separation and photocatalytic hydrogen evolution from water using RuIIPtII-based molecular devices: Effects of introducing additional donor and/or acceptor sites. Dalton Trans 2011; 40:3955-66. [DOI: 10.1039/c0dt01673j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3174
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Parida KM, Nashim A, Mahanta SK. Visible-light driven Gd2Ti2O7/GdCrO3 composite for hydrogen evolution. Dalton Trans 2011; 40:12839-45. [DOI: 10.1039/c1dt11517k] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3175
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Zeng P, Zhang Q, Peng T, Zhang X. One-pot synthesis of reduced graphene oxide–cadmium sulfide nanocomposite and its photocatalytic hydrogen production. Phys Chem Chem Phys 2011; 13:21496-502. [DOI: 10.1039/c1cp22059d] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3176
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Dasog M, Rachinsky C, Veinot JGC. From Si and C encapsulated SiO2 to SiC: exploring the influence of sol–gel polymer substitution on thermally induced nanocrystal formation. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11858g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shimura K, Kawai H, Yoshida T, Yoshida H. Simultaneously photodeposited rhodium metal and oxide nanoparticles promoting photocatalytic hydrogen production. Chem Commun (Camb) 2011; 47:8958-60. [DOI: 10.1039/c1cc12287h] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3178
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Chai B, Peng T, Zeng P, Mao J. Synthesis of floriated In2S3 decorated with TiO2 nanoparticles for efficient photocatalytic hydrogen production under visible light. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11566a] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3179
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Liu H, Yuan J, Jiang Z, Shangguan W, Einaga H, Teraoka Y. Novel photocatalyst of V-based solid solutions for overall water splitting. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11809a] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3181
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Liu G, Yu JC, Lu GQ(M, Cheng HM. Crystal facet engineering of semiconductor photocatalysts: motivations, advances and unique properties. Chem Commun (Camb) 2011; 47:6763-83. [DOI: 10.1039/c1cc10665a] [Citation(s) in RCA: 766] [Impact Index Per Article: 58.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Cui Y, Zhang J, Zhang G, Huang J, Liu P, Antonietti M, Wang X. Synthesis of bulk and nanoporous carbon nitride polymers from ammonium thiocyanate for photocatalytic hydrogen evolution. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11961c] [Citation(s) in RCA: 371] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lin CC, Wei TY, Lee KT, Lu SY. Titania and Pt/titania aerogels as superior mesoporous structures for photocatalytic water splitting. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11992c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Awate SV, Deshpande SS, Rakesh K, Dhanasekaran P, Gupta NM. Role of micro-structure and interfacial properties in the higher photocatalytic activity of TiO2-supported nanogold for methanol-assisted visible-light-induced splitting of water. Phys Chem Chem Phys 2011; 13:11329-39. [DOI: 10.1039/c1cp21194c] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xiang Q, Yu J, Wang W, Jaroniec M. Nitrogen self-doped nanosized TiO2 sheets with exposed {001} facets for enhanced visible-light photocatalytic activity. Chem Commun (Camb) 2011; 47:6906-8. [DOI: 10.1039/c1cc11740h] [Citation(s) in RCA: 317] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3187
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Li R, Kobayashi H, Guo J, Fan J. Visible-light-driven surface reconstruction of mesoporous TiO2: toward visible-light absorption and enhanced photocatalytic activities. Chem Commun (Camb) 2011; 47:8584-6. [DOI: 10.1039/c1cc12464a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hou Y, Li X, Zhao Q, Quan X, Chen G. TiO2 nanotube/Ag–AgBr three-component nanojunction for efficient photoconversion. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12788h] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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3189
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Chen Y, Wang L, Lu G(M, Yao X, Guo L. Nanoparticles enwrapped with nanotubes: A unique architecture of CdS/titanate nanotubes for efficient photocatalytic hydrogen production from water. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03945d] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3190
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Liang S, Shen L, Zhu J, Zhang Y, Wang X, Li Z, Wu L, Fu X. Morphology-controlled synthesis and efficient photocatalytic performances of a new promising photocatalyst Sr0.25H1.5Ta2O6·H2O. RSC Adv 2011. [DOI: 10.1039/c1ra00233c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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3191
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Lakadamyali F, Reisner E. Photocatalytic H2 evolution from neutral water with a molecular cobalt catalyst on a dye-sensitised TiO2 nanoparticle. Chem Commun (Camb) 2011; 47:1695-7. [DOI: 10.1039/c0cc04658b] [Citation(s) in RCA: 171] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3192
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Dielmann F, Sierka M, Virovets A, Scheer M. Zugang zu ausgedehnten Polyphosphor-Gerüsten. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201001000] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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