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      Pt‐Decorated g‐C 3N 4/TiO 2 Nanotube Arrays with Enhanced Visible‐Light Photocatalytic Activity for H 2 Evolution

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          Abstract

          Aligned TiO 2 nanotube layers (TiNTs) grown by self‐organizing anodization of a Ti‐substrate in a fluoride‐based electrolyte were decorated with graphitic‐phase C 3N 4 (g‐C 3N 4) via a facile chemical vapor deposition approach. In comparison with classical TiO 2 nanotubes (anatase), the g‐C 3N 4/TiNTs show an onset of the photocurrent at 2.4 eV (vs. 3.2 eV for anatase) with a considerably high photocurrent magnitude in the visible range. After further decoration with Pt nanoparticles, we obtained a visible‐light responsive platform that showed, compared with g‐C 3N 4‐free TiNTs, a strong enhancement for photoelectrochemical and bias‐free H 2 evolution (15.62 μLh −1 cm −2), which was almost a 98‐fold increase in the H 2 production rate of TiNTs (0.16 μLh −1 cm −2). In a wider context, the g‐C 3N 4‐combined 3 D nanoporous/nanotubular structure thus provides a platform with significant visible‐light response in photocatalytic applications.

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          Quantum dot solar cells. Tuning photoresponse through size and shape control of CdSe-TiO2 architecture.

          Anusorn Kongkanand, Kevin Tvrdy, Kensuke Takechi … (2008)
          Different-sized CdSe quantum dots have been assembled on TiO2 films composed of particle and nanotube morphologies using a bifunctional linker molecule. Upon band-gap excitation, CdSe quantum dots inject electrons into TiO2 nanoparticles and nanotubes, thus enabling the generation of photocurrent in a photoelectrochemical solar cell. The results presented in this study highlight two major findings: (i) ability to tune the photoelectrochemical response and photoconversion efficiency via size control of CdSe quantum dots and (ii) improvement in the photoconversion efficiency by facilitating the charge transport through TiO2 nanotube architecture. The maximum IPCE (photon-to-charge carrier generation efficiency) obtained with 3 nm diameter CdSe nanoparticles was 35% for particulate TiO2 and 45% for tubular TiO2 morphology. The maximum IPCE observed at the excitonic band increases with decreasing particle size, whereas the shift in the conduction band to more negative potentials increases the driving force and favors fast electron injection. The maximum power-conversion efficiency
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            Organic-inorganic composite photocatalyst of g-C(3)N(4) and TaON with improved visible light photocatalytic activities.

            Shaohua Li, S. Lv, Pearlly S Yan … (2010)
            Organic-inorganic composite photocatalyst g-C(3)N(4)-TaON with visible-light response was prepared by a milling-heat treatment method. The photocatalyst was characterized by X-ray diffraction, high-resolution transmission electron microscopy and UV-vis diffuse reflection spectroscopy. The activity of composite photocatalyst g-C(3)N(4)-TaON for photodegradation of rhodamine B is higher than that of either single-phase g-C(3)N(4) or TaON. The obviously increased performance of g-C(3)N(4)-TaON is ascribed mainly to enhancement of electron-hole separations both at the interface and in the semiconductors.
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              One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

              Kiyoung Lee, Anca Mazare, Patrik Schmuki (2014)
              Article 0 comments Cited 143 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Prof. Dr. Yan‐Yan Song: yysong@mail.neu.edu.cn
                Prof. Dr. Patrik Schmuki: schmuki@ww.uni-erlangen.de
                Journal
                Journal ID (nlm-ta): ChemistryOpen
                Journal ID (iso-abbrev): ChemistryOpen
                Journal ID (doi): 10.1002/(ISSN)2191-1363
                Journal ID (publisher-id): OPEN
                Title: ChemistryOpen
                Publisher: John Wiley and Sons Inc. (Hoboken )
                ISSN (Electronic): 2191-1363
                Publication date (Electronic): 28 January 2016
                Publication date Collection: June 2016
                Volume: 5
                Issue: 3 ( doiID: 10.1002/open.v5.3 )
                Pages: 197-200
                Affiliations
                [ 1 ] College of SciencesNortheastern University Shenyang 110004P. R. China
                [ 2 ] Department of Materials Science and Engineering, WW4-LKOUniversity of Erlangen–Nuremberg Martensstrasse 7 Erlangen 91058Germany
                [ 3 ] Department of Chemistry Faculty of ScienceKing Abdulaziz University Jeddah 21569Saudi Arabia
                Author notes
                [†]

                Z.‐D. G. and P. S. conducted the research and discussed the results. Y.‐F. Q. prepared the samples, X. Z. carried out the H 2 evolution test, and L. W. carried out the photoelectrochemical test. Y.‐Y. S. carried out the electrochemical experiments, Y.‐F. Q. and X. Z. carried out the materials characterizations. Z.‐D. G. and Y.‐Y. S. drafted the paper. All of the authors reviewed the manuscript and participated in discussions on the results of this research.

                Article
                Publisher ID: OPEN201500219
                DOI: 10.1002/open.201500219
                PMC ID: 5114716
                SO-VID: 30c0ec55-896f-444a-b0fa-2e29874ecedd
                Copyright © © 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
                License:

                This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

                History
                Date received : 09 December 2015
                Page count
                Figures: 4, Tables: 0, References: 44, Pages: 4
                Funding
                Funded by: National Natural Science Foundation of China
                Award ID: 21322504
                Award ID: 21275026
                Funded by: Fundamental Research Funds for the Central Universities
                Award ID: N120505002
                Award ID: N120505006
                Award ID: N110805001
                Funded by: Program for Liaoning Excellent Talents in University
                Award ID: LJQ2013028
                Funded by: European Research Council (ERC)
                Funded by: German Research Foundation (DFG)
                Categories
                Subject: Communication
                Subject: Communications
                Custom metadata
                source-schema-version-number 2.0
                component-id open201500219
                cover-date June 2016
                details-of-publishers-convertor Converter:WILEY_ML3GV2_TO_NLMPMC version:4.9.7 mode:remove_FC converted:18.11.2016

                Keywords: graphitic carbon nitride,hydrogen evolution,photocatalysis,tio2 nanotubes,visible light
                Data availability:
                Keywords: graphitic carbon nitride, hydrogen evolution, photocatalysis, tio2 nanotubes, visible light

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