Rational design of carbon and TiO2 assembly materials: covered or strewn, which is better for photocatalysis?

Cui, Guanwei; Wang, Weiliang; Ma, Mingyue; Zhang, Ming; Xia, Xinyuan; Han, Feng-Yun; Shi, Xifeng; Zhao, Yang; Dong, Yu‐Bin; Tang, Bo

doi:10.1039/c3cc42500b

Cited by 55 publications

(44 citation statements)

References 17 publications

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“…From the analysis of photocatalytic kinetic constants, the photocatalytic activity of C-TiO 2 is found to increase before the carbon weight percent reaches 3.6% and decrease gradually afterwards, proposing that the optimum coupled quantity of C-dots is 3.6% in our experiment. This is well consistent with the earlier results [20,21]. It is noteworthy that 3D TiO 2 nanorod sphere as support material results in a higher value of 3.6% for the best C-dot coupling amount on 3D TiO 2 than that of 1.5% on the TiO 2 sphere in the earlier work [20,21].…”

Section: Photocatalysis Properties Under Visible Light Irradiationsupporting

confidence: 91%

“…With the 11.1% of C-dots, the C-TiO 2 composite exhibits very strong visible light absorption from 400 to 800 nm. This suggests that the addition of C-dots effectively increases the adsorption of TiO 2 nanorod sphere in the visible light region, which is in good agreement with the reports in the literatures [20,21].…”

Section: 2supporting

confidence: 87%

“…The C-dots sensitized TiO 2 can effectively extent the visible light absorption and improve the visible light photocatalytic activity. Nevertheless, there are few reports to produce high-efficient TiO 2 -based visible light driven photocatalysts linked with the C-dots with high photoluminescence and visible light absorption [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Three dimensional carbogenic dots/TiO2 nanoheterojunctions with enhanced visible light-driven photocatalytic activity

Liu

Zhu

et al. 2014

Carbon

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Section: Photocatalysis Properties Under Visible Light Irradiationsupporting

confidence: 91%

Section: 2supporting

confidence: 87%

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Three dimensional carbogenic dots/TiO2 nanoheterojunctions with enhanced visible light-driven photocatalytic activity

Liu

Zhu

et al. 2014

Carbon

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“…Integrating photo-inactive carbon as a co-adsorbent was also reported to increase the photocatalytic activities of TiO2 due to the synergistic effect of the high adsorption capacity of carbon and the photocatalytic activity of TiO2 [26,27]. Therefore, photocatalytic selectivity can be achieved when carbon materials with selective adsorptive properties are introduced into TiO2/carbon composites.…”

Section: Introductionmentioning

confidence: 99%

Carbon coated Au/TiO2 mesoporous microspheres: a novel selective photocatalyst

Liu

Wang

et al. 2017

Sci. China Mater.

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Photocatalysts with desirable selectivity to transformation and purification of targeted pollutants are of great importance in water purification. Here, we demonstrate that selective photocatalysis can be realized by the assistance of gold-enhanced selective adsorption onto carbon-coated Au/TiO2 mesoporous microspheres (Au/TiO2@C-MM), which were prepared via a surfactant-assisted two-step method that involved the assembly of oleic acid-stabilized titania and gold nanoparticles into colloidal spheres in an emulsion using sodium dodecyl sulfate as a surfactant and the conversion of the surfactants into carbon under annealing in Ar. Due to the negatively charged amorphous carbon, the mesoporous structure, and the surface plasmon resonance absorption of the Au components, the Au/TiO2@C-MM shows enhanced charge-and size-selective adsorption properties, which enables the materials to have high selectivity in the photocatalytic process.

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“…[9][10][11][12][13][14][15] The electron injection from CDs to TiO 2 was demonstrated to be feasible and the CD-sensitized TiO 2 photoelectrodes have been applied in photocatalysis and PVs. 10,[16][17][18][19][20][21] However, it is still a challenge to achieve efficient electron injection from CDs to TiO 2 under sunlight, 21 which is a primary photophysical process in generating photocurrent in CD-based PVs. 22,23 To date, the power conversion efficiency of CD-based PVs has been only 0.13%, as reported by Mirtchev and co-workers.…”

Section: Introductionmentioning

confidence: 99%

Towards efficient photoinduced charge separation in carbon nanodots and TiO₂ composites in the visible region

Sun

et al. 2015

Phys. Chem. Chem. Phys.

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Towards efficient photoinduced charge separation in carbon nanodots and TiO2 composites in the visible region Sun, M.; Qu, S.; Ji, W.; Jing, P.; Li, D.; Qin, L.; Cao, J.; Zhang, H.; Zhao, J.; Shen, D. General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. In this work, photoinduced charge separation behaviors in non-long-chain-molecule-functionalized carbon nanodots (CDs) with visible intrinsic absorption (CDs-V) and TiO 2 composites were investigated. Efficient photoinduced electron injection from CDs-V to TiO 2 with a rate of 8.8 Â 10 8 s À1 and efficiency of 91% was achieved in the CDs-V/TiO 2 composites. The CDs-V/TiO 2 composites exhibited excellent photocatalytic activity under visible light irradiation, superior to pure TiO 2 and the CDs with the main absorption band in the ultraviolet region and TiO 2 composites, which indicated that visible photoinduced electrons and holes in such CDs-V/TiO 2 composites could be effectively separated. The incident photon-to-current conversion efficiency (IPCE) results for the CD-sensitized TiO 2 solar cells also agreed with efficient photoinduced charge separation between CDs-V and the TiO 2 electrode in the visible range. These results demonstrate that non-long-chainmolecule-functionlized CDs with a visible intrinsic absorption band could be appropriate candidates for photosensitizers and offer a new possibility for the development of a well performing CD-based photovoltaic system.

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Rational design of carbon and TiO2 assembly materials: covered or strewn, which is better for photocatalysis?

Cited by 55 publications

References 17 publications

Three dimensional carbogenic dots/TiO2 nanoheterojunctions with enhanced visible light-driven photocatalytic activity

Three dimensional carbogenic dots/TiO2 nanoheterojunctions with enhanced visible light-driven photocatalytic activity

Carbon coated Au/TiO2 mesoporous microspheres: a novel selective photocatalyst

Towards efficient photoinduced charge separation in carbon nanodots and TiO₂ composites in the visible region

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