1
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Kubiak A, Zalas M, Cegłowski M. Innovative microwave in situ approach for crystallizing TiO 2 nanoparticles with enhanced activity in photocatalytic and photovoltaic applications. Sci Rep 2024; 14:12617. [PMID: 38824155 PMCID: PMC11144198 DOI: 10.1038/s41598-024-63614-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 05/30/2024] [Indexed: 06/03/2024] Open
Abstract
This investigation introduces an innovative approach to microwave-assisted crystallization of titania nanoparticles, leveraging an in situ process to expedite anatase crystallization during microwave treatment. Notably, this technique enables the attainment of crystalline material at temperatures below 100 °C. The physicochemical properties, including crystallinity, morphology, and textural properties, of the synthesized TiO2 nanomaterials show a clear dependence on the microwave crystallization temperature. The presented microwave crystallization methodology is environmentally sustainable, owing to heightened energy efficiency and remarkably brief processing durations. The synthesized TiO2 nanoparticles exhibit significant effectiveness in removing formic acid, confirming their practical utility. The highest efficiency of formic acid photodegradation was demonstrated by the T_200 material, reaching almost 100% efficiency after 30 min of irradiation. Furthermore, these materials find impactful application in dye-sensitized solar cells, illustrating a secondary avenue for the utilization of the synthesized nanomaterials. Photovoltaic characterization of assembled DSSC devices reveals that the T_100 material, synthesized at a higher temperature, exhibits the highest photoconversion efficiency attributed to its outstanding photocurrent density. This study underscores the critical importance of environmental sustainability in the realm of materials science, highlighting that through judicious management of the synthesis method, it becomes feasible to advance towards the creation of multifunctional materials.
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Affiliation(s)
- Adam Kubiak
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Uniwersytetu Poznanskiego 8, 61614, Poznan, Poland.
| | - Maciej Zalas
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Uniwersytetu Poznanskiego 8, 61614, Poznan, Poland
| | - Michał Cegłowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Uniwersytetu Poznanskiego 8, 61614, Poznan, Poland
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2
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Alaizeri ZM, Alhadlaq HA, Aldawood S, Abduh NAY. Green synthesis of ZnO-TiO 2/RGO nanocomposites using Senna surattensis extract: a novel approach for enhanced anticancer efficacy and biocompatibility. RSC Adv 2024; 14:16685-16695. [PMID: 38784428 PMCID: PMC11110525 DOI: 10.1039/d4ra01634c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 04/12/2024] [Indexed: 05/25/2024] Open
Abstract
The purpose of the present study is to enhance the anticancer and biocompatibility performance of TiO2 NPs, ZnO NPs, ZnO-TiO2 (NCs), and ZnO-TiO2/reduced graphene oxide (RGO) NCs against two types of human cancer (HCT116) and normal (HUVCE) cells. A novel procedure for synthesizing ZnO-TiO2/RGO NCs has been developed using Senna surattensis extract. The improved physicochemical properties of the obtained samples were investigated using different techniques such as XRD, TEM, SEM, XPS, FTIR, DLS and UV-visible spectroscopy. XRD results showed that the addition of ZnO and RGO sheets affects the crystal structure and phase of TiO2 NPs. SEM and TEM images displayed that the TiO2 NPs and ZnO NPs were small with uniform spherical morphology in the prepared ZnO-TiO2/RGO NCs. Besides, it is shown that ZnO-TiO2 NCs anchored onto the surface of RGO sheets with a particle size of 14.80 ± 0.5 nm. XPS data confirmed the surface chemical composition and oxidation states of ZnO-TiO2/RGO NCs. Functional groups of prepared NPs and NCs were determined using FTIR spectroscopy. DLS data confirmed that the addition of ZnO and RGO sheets improves the negative surface charge of the prepared pure TiO2 NPs (-22.51 mV), ZnO NPs (-18.27 mV), ZnO-TiO2 NCs (-30.20 mV), and ZnO-TiO2/RGO NCs (-33.77 mV). Optical analysis exhibited that the bandgap energies of TiO2 NPs (3.30 eV), ZnO NPs (3.33 eV), ZnO-TiO2 NCs (3.03 eV), and ZnO-TiO2/RGO NCs (2.78 eV) were further enhanced by adding ZnO NPs and RGO sheets. This indicates that the synthesized samples can be applied to cancer therapy and environmental remediation. The biological data demonstrated that the produced ZnO-TiO2/RGO NCs show a more cytotoxic effect on HCT116 cells compared to pure TiO2 NPs and ZnO-TiO2 NCs. On the other hand, these NCs displayed the lowest level of toxicity towards normal HUVCE cells. These results indicate that the ZnO-TiO2/RGO NCs have strong toxicity against HCT116 cells and are compatible with normal cells. Our results show that the plant extract enhanced the physicochemical properties of NPs and NCs compared with the traditional chemical methods for synthesis. This study could open new avenues for developing more effective and targeted cancer treatments.
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Affiliation(s)
- ZabnAllah M Alaizeri
- Department of Physics and Astronomy, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | - Hisham A Alhadlaq
- Department of Physics and Astronomy, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | - Saad Aldawood
- Department of Physics and Astronomy, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | - Naaser A Y Abduh
- Department of Chemistry, College of Science, King Saud University Riyadh 11451 Saudi Arabia
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3
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Ali I, Chang LM, Farheen J, Huang J, Gu ZG. Facile Synthesis of Novel Ti 2C Nano Bipyramids for Photothermal and Photodynamic Therapy of Breast Cancer. Chempluschem 2024; 89:e202300544. [PMID: 38235954 DOI: 10.1002/cplu.202300544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 12/18/2023] [Accepted: 01/18/2024] [Indexed: 01/19/2024]
Abstract
Photo-responsive synergetic therapeutics achieved significant attraction in cancer theranostic due to the versatile characteristics of nanomaterials. There have been substantial efforts in developing the simplest nano-design with exceptional synergistic properties and multifunctionalities. In this work, biocompatible Ti2C MXene nano bipyramids (MNBPs) were synthesized by hydrothermal method with dual functionalities of photothermal and photodynamic therapies. The MNBPs shape was obtained from two-dimensional (2D) Ti2C nanosheets by controlling the temperature of the reaction mixture. The structure of these Ti2C MNBPs was characterized by a high-resolution transmission electron microscope, scanning electron microscope, atomic force microscope, X-ray photoelectron spectroscopy, and X-ray diffraction. The Ti2C NBPs have shown exceptional photothermal properties with increased temperature to 72.3 °C under 808 nm laser irradiation. The designed nano bipyramids demonstrated excellent cellular uptake and biocompatibility. The Ti2C NBP has established a remarkable photothermal therapy (PTT) effect against 4T1 breast cancer cells. Moreover, Ti2C NBPs showed a profound response to UV light (6 mW/cm2) and produced reactive oxygen species, making them useful for photodynamic therapy (PDT). These in-vitro studies pave a new path to tune the properties of photo-responsive MXene nanosheets, indicating a potential use in biomedical applications.
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Affiliation(s)
- Israt Ali
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Li-Mei Chang
- Fuzhou University, College of Chemistry, Fuzhou, 350108, China
| | - Jabeen Farheen
- Institute of Smart Biomedical Materials, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Jiandong Huang
- Fuzhou University, College of Chemistry, Fuzhou, 350108, China
| | - Zhi-Gang Gu
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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4
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Valero R, Morales-García Á, Illas F. Estimating Nonradiative Excited-State Lifetimes in Photoactive Semiconducting Nanostructures. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:2713-2721. [PMID: 38379918 PMCID: PMC10875665 DOI: 10.1021/acs.jpcc.3c08053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 02/22/2024]
Abstract
The time evolution of the exciton generated by light adsorption in a photocatalyst is an important feature that can be approached from full nonadiabatic molecular dynamics simulations. Here, a crucial parameter is the nonradiative recombination rate between the hole and the electron that form the exciton. In the present work, we explore the performance of a Fermi's golden rule-based approach on predicting the recombination rate in a set of photoactive titania nanostructures, relying solely on the coupling of the ground and first excited state. In this scheme the analysis of the first excited state is carried out by invoking Kasha's rule thus avoiding computationally expensive nonadiabatic molecular dynamics simulations and resulting in an affordable estimate of the recombination rate. Our results show that, compared to previous ones from nonadiabatic molecular dynamics simulations, semiquantitative recombination rates can be predicted for the smaller titania nanostructures, and qualitative values are obtained from the larger ones. The present scheme is expected to be useful in the field of computational heterogeneous photocatalysis whenever a complex and computationally expensive full nonadiabatic molecular dynamics cannot be carried out.
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Affiliation(s)
- Rosendo Valero
- Departament
de Ciència de Materials i Química Física &
Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona. c/Martí i Franquès 1-11, 08028 Barcelona, Spain
- Headquarters
Research Institute, Zhejiang Huayou Cobalt, 018 Wuzhen East Rd, 314599 Jiaxing, Zhejiang, China
| | - Ángel Morales-García
- Departament
de Ciència de Materials i Química Física &
Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona. c/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Francesc Illas
- Departament
de Ciència de Materials i Química Física &
Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona. c/Martí i Franquès 1-11, 08028 Barcelona, Spain
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5
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Kubiak A, Cegłowski M. Unraveling the impact of microwave-assisted techniques in the fabrication of yttrium-doped TiO 2 photocatalyst. Sci Rep 2024; 14:262. [PMID: 38168912 PMCID: PMC10761958 DOI: 10.1038/s41598-023-51078-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/30/2023] [Indexed: 01/05/2024] Open
Abstract
In this study, we investigate the role of microwave technology in the fabrication of yttrium-doped TiO2 through a comparative analysis of hydrothermal techniques. Microwave-assisted hydrothermal synthesis offers advantages, but a comprehensive comparison between microwave-assisted and conventional methods is lacking. Therefore, in our investigation, we systematically evaluate and compare the morphological, structural, and optical properties of yttrium-doped TiO2 samples synthesized using both techniques. The X-ray diffraction (XRD) patterns confirm the anatase tetragonal structure of the synthesized TiO2-Y systems, while the larger ion radius of yttrium (Y3+) compared to titanium (Ti4+) presents challenges for yttrium to incorporate into the TiO2 lattice. The X-ray Photoelectron Spectroscopy (XPS) revealed a significant difference in the atomic content of yttrium between the TiO2-Y systems synthesized using microwave-assisted and conventional methods. This finding suggests that the rapid microwave method is more effective in successfully doping TiO2 with rare earth metals such as yttrium. The photo-oxidation of carbamazepine (CBZ) using TiO2-Y systems demonstrated high efficiency under UV-LED light. Microwave-synthesized TiO2-Y demonstrates improved photo-oxidation efficiency of CBZ, attributed to enhanced absorption, charge transfer, surface area, and crystallite size. Overall, the microwave-synthesized TiO2-Y systems showed promising performance for the photo-oxidation of CBZ, with improved efficiency compared to conventional synthesis methods.
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Affiliation(s)
- Adam Kubiak
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Uniwersytetu Poznanskiego 8, 61614, Poznan, Poland.
| | - Michał Cegłowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, Uniwersytetu Poznanskiego 8, 61614, Poznan, Poland
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6
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Nartova AV, Kvon RI, Kovtunova LM, Skovpin IV, Koptyug IV, Bukhtiyarov VI. XPS and HR TEM Elucidation of the Diversity of Titania-Supported Single-Site Ir Catalyst Performance in Spin-Selective Propene Hydrogenation. Int J Mol Sci 2023; 24:15643. [PMID: 37958626 PMCID: PMC10650017 DOI: 10.3390/ijms242115643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/19/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Immobilized [Ir(COD)Cl]2-Linker/TiO2 catalysts with linkers containing Py, P(Ph)2 and N(CH3)2 functional groups were prepared. The catalysts were tested via propene hydrogenation with parahydrogen in a temperature range from 40 °C to 120 °C which was monitored via NMR. The catalytic behavior of [Ir(COD)Cl]2-Linker/TiO2 is explained on the basis of quantitative and qualitative XPS data analysis performed for the catalysts before and after the reaction at 120 °C. It is shown that the temperature dependence of propene conversion and the enhancement of the NMR signal are explained via a combination of the stabilities of both the linker and immobilized [Ir(COD)Cl]2 complex. It is demonstrated that the N(CH3)2-linker is the most stable at the surface of TiO2 under used reaction conditions. As a result, only this sample shows a rise in the enhancement of the NMR signal in the 100-120 °C temperature range.
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Affiliation(s)
- Anna V. Nartova
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
| | - Ren I. Kvon
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
| | - Larisa M. Kovtunova
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
| | - Ivan V. Skovpin
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center SB RAS, Institutskaya St. 3A, 630090 Novosibirsk, Russia (I.V.K.)
| | - Igor V. Koptyug
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center SB RAS, Institutskaya St. 3A, 630090 Novosibirsk, Russia (I.V.K.)
| | - Valerii I. Bukhtiyarov
- Department of Physical-Chemical Methods of Investigation, Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, 630090 Novosibirsk, Russia; (R.I.K.); (V.I.B.)
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7
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Chen Y, Soler L, Cazorla C, Oliveras J, Bastús NG, Puntes VF, Llorca J. Facet-engineered TiO 2 drives photocatalytic activity and stability of supported noble metal clusters during H 2 evolution. Nat Commun 2023; 14:6165. [PMID: 37789037 PMCID: PMC10547715 DOI: 10.1038/s41467-023-41976-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 09/25/2023] [Indexed: 10/05/2023] Open
Abstract
Metal clusters supported on TiO2 are widely used in many photocatalytic applications, including pollution control and production of solar fuels. Besides high photoactivity, stability during the photoreaction is another essential quality of high-performance photocatalysts, however systematic studies on this attribute are absent for metal clusters supported on TiO2. Here we have studied, both experimentally and with first-principles simulation methods, the stability of Pt, Pd and Au clusters prepared by ball milling on nanoshaped anatase nanoparticles preferentially exposing {001} (plates) and {101} (bipyramids) facets during the photogeneration of hydrogen. It is found that Pt/TiO2 exhibits superior stability than Pd/TiO2 and Au/TiO2, and that {001} facet-based photocatalysts always are more stable than their {101} analogous regardless of the considered metal species. The loss of stability associated with cluster sintering, which is facilitated by the transfer of photoexcited carriers from the metal species to the neighbouring Ti and O atoms, most significantly and detrimentally affects the H2-evolution photoactivity.
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Affiliation(s)
- Yufen Chen
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 16, EEBE, Barcelona, 08019, Spain
- Institute of Energy Technologies and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 16, EEBE, Barcelona, 08019, Spain
| | - Lluís Soler
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 16, EEBE, Barcelona, 08019, Spain.
- Institute of Energy Technologies and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 16, EEBE, Barcelona, 08019, Spain.
| | - Claudio Cazorla
- Department of Physics, Universitat Politècnica de Catalunya, Campus Nord, B4-B5, Barcelona, E-08034, Spain
| | - Jana Oliveras
- Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB, 08193, Barcelona, Spain
| | - Neus G Bastús
- Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB, 08193, Barcelona, Spain
| | - Víctor F Puntes
- Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB, 08193, Barcelona, Spain
- Institució Catalana de Recerca I Estudis Avançats (ICREA), 08010, Barcelona, Spain
- Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Passeig de la Vall d'Hebron, 129, Barcelona, 08035, Spain
| | - Jordi Llorca
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 16, EEBE, Barcelona, 08019, Spain.
- Institute of Energy Technologies and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany 16, EEBE, Barcelona, 08019, Spain.
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8
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Debgupta J, Lari L, Isaacs M, Carey J, McKenna KP, Lazarov VK, Chechik V, Douthwaite RE. Predictive Removal of Interfacial Defect-Induced Trap States between Titanium Dioxide Nanoparticles via Sub-Monolayer Zirconium Coating. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:660-671. [PMID: 36660098 PMCID: PMC9841567 DOI: 10.1021/acs.jpcc.2c06927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/13/2022] [Indexed: 06/17/2023]
Abstract
First principles modeling of anatase TiO2 surfaces and their interfacial contacts shows that defect-induced trap states within the band gap arise from intrinsic structural distortions, and these can be corrected by modification with Zr(IV) ions. Experimental testing of these predictions has been undertaken using anatase nanocrystals modified with a range of Zr precursors and characterized using structural and spectroscopic methods. Continuous-wave electron paramagnetic resonance (EPR) spectroscopy revealed that under illumination, nanoparticle-nanoparticle interfacial hole trap states dominate, which are significantly reduced after optimizing the Zr doping. Fabrication of nanoporous films of these materials and charge injection using electrochemical methods shows that Zr doping also leads to improved electron conductivity and mobility in these nanocrystalline systems. The simple methodology described here to reduce the concentration of interfacial defects may have wider application to improving the efficiency of systems incorporating metal oxide powders and films including photocatalysts, photovoltaics, fuel cells, and related energy applications.
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Affiliation(s)
| | - Leonardo Lari
- Department
of Physics, University of York, Heslington, York YO10 5DD, UK
| | - Mark Isaacs
- HarwellXPS, R92 Research Complex at Harwell, Rutherford Appleton Laboratories,
Harwell, Didcot OX11 0QS, UK
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - John Carey
- Department
of Physics, University of York, Heslington, York YO10 5DD, UK
| | - Keith P. McKenna
- Department
of Physics, University of York, Heslington, York YO10 5DD, UK
| | - Vlado K. Lazarov
- Department
of Physics, University of York, Heslington, York YO10 5DD, UK
| | - Victor Chechik
- Department
of Chemistry, University of York, York YO10 5DD, UK
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9
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Zhao Y, Liu X, Ma B, Li Y, Fan X, Zhang F, Zhang G, Peng W. Facet Dependent Activity of Fe(III) Species Modified TiO 2 for Simulated Sunlight Driven Fenton-like Reactions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:52940-52950. [PMID: 36383831 DOI: 10.1021/acsami.2c16144] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
TiO2 crystals with different exposed facets are synthesized and modified facilely by depositing Fe(III) species. With more (101) facets exposed, the photoactivity of Fe-TiO2 is obviously enhanced with peroxymonosulfate (PMS) as oxidant. The degradation rate for 20 ppm Bisphenol A (BPA) on Fe-TiO2 (101) can achieve 0.219 min-1, ∼8.5 times faster than that of pure TiO2 under simulated sunlight irradiation. Photoelectrochemical measurements and density functional theory (DFT) calculations confirm that the interfacial charge transfer (IFCT) on Fe-TiO2 (101) is stronger than that on Fe-TiO2 (001) and a faster Fe(III)/Fe(II) transformation rate can be therefore achieved. As a result, the generation of ·OH and 1O2 will be accelerated with more (101) facets exposed, thus obtaining better photoactivity. Under the Fe-TiO2/PMS/Light system, BPA can be effectively degraded in a wide pH range or in the presence of multiple inorganic anions. After five cycles, 100% BPA can still be degraded within 60 min. The study provides new photocatalysts design strategy based on Fe(III)/Fe(II) redox for PMS based photocatalytic oxidation.
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Affiliation(s)
- Yang Zhao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Xiaomei Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Biao Ma
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Yang Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Xiaobin Fan
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Fengbao Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Guoliang Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
| | - Wenchao Peng
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300050, China
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10
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Du Y, Niu X, Zhang C, Li X, Cai X, Guo Y, Wang P. FacileSynthesis of Anatase TiO
2
Nanocrystals with Co‐Exposed{101}, {010}/{100} and [111]‐Facets for EfficientPhotodegradation of Methylene Blue. ChemistrySelect 2021. [DOI: 10.1002/slct.202004195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yi‐en Du
- School of Chemistry & Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Xianjun Niu
- School of Chemistry & Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Caifeng Zhang
- Department of Chemistry Taiyuan Normal University Jinzhong 030619 China
| | - Xiaodong Li
- School of Chemistry & Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Xuemei Cai
- School of Chemistry & Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Yanqing Guo
- School of Chemistry & Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Pengfei Wang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China
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11
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Joutsuka T, Yoshinari H, Yamauchi S. Facet Dependence of Photocatalytic Activity in Anatase TiO 2: Combined Experimental and DFT Study. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200236] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Tatsuya Joutsuka
- Institute of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, Hitachi, Ibaraki 316-8511, Japan
| | - Hiroto Yoshinari
- Institute of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, Hitachi, Ibaraki 316-8511, Japan
| | - Satoshi Yamauchi
- Institute of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, Hitachi, Ibaraki 316-8511, Japan
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12
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Zhang H, Jiang Y, Zhou B, Wei Z, Zhu Z, Han L, Zhang P, Hu Y. Preparation and photocatalytic performance of silver-modified and nitrogen-doped TiO2 nanomaterials with oxygen vacancies. NEW J CHEM 2021. [DOI: 10.1039/d0nj04755d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A modified hydrothermal method for the synthesis of TiO2 material to achieve a more efficient visible light response.
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Affiliation(s)
- Hong Zhang
- School of Chemical Engineering
- Northwest Minzu University
- Lanzhou
- China
| | - Yingyu Jiang
- School of Chemical Engineering
- Northwest Minzu University
- Lanzhou
- China
- Gansu Natural Energy Insititue
| | - Baiqin Zhou
- School of Civil and Environmental Engineering
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
| | - Zhuo Wei
- School of Chemical Engineering
- Northwest Minzu University
- Lanzhou
- China
| | - Zhenya Zhu
- School of Chemical Engineering
- Northwest Minzu University
- Lanzhou
- China
| | - Lijuan Han
- Gansu Natural Energy Insititue
- Gansu Academy of Sciences
- Lanzhou
- China
| | - Ping Zhang
- School of Chemical Engineering
- Northwest Minzu University
- Lanzhou
- China
| | - Yingying Hu
- Gansu Natural Energy Insititue
- Gansu Academy of Sciences
- Lanzhou
- China
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13
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Sun J, Sun J, Wang X. Anatase TiO
2
with Co‐exposed (001) and (101) Surface‐Based Photocatalytic Materials for Energy Conversion and Environmental Purification. Chem Asian J 2020; 15:4168-4183. [DOI: 10.1002/asia.202001085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/28/2020] [Indexed: 01/15/2023]
Affiliation(s)
- Jingjing Sun
- School of Environmental Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Jing Sun
- School of Environmental Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Xikui Wang
- School of Environmental Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
- Shandong Agriculture and Engineering University Ji'nan 250100 P. R. China
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14
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Enhanced Visible Light Photocatalytic Activity of N and Ag Doped and Co-Doped TiO2 Synthesized by Using an In-Situ Solvothermal Method for Gas Phase Ammonia Removal. Catalysts 2020. [DOI: 10.3390/catal10020251] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Single doping and co-doping of N and Ag on TiO2 were successfully prepared by using an in-situ solvothermal method and their structural properties and chemical compositions were characterized. The results indicated that all photocatalysts displayed in TiO2 anatase crystal phase, and a small mesoporous structure was observed in the doped materials. The main roles of N and Ag on the property and photocatalytic activity of TiO2 were different. The N doping has significantly enhanced homogenous surface morphology and specific surface area of the photocatalyst. While Ag doping was narrowing the band gap energy, extending light absorption toward a visible region by surface plasmon resonance as well as delaying the recombination rate of electron and hole of TiO2. The existence of N in TiO2 lattice was observed in two structural linkages such as substitutional nitrogen (Ti-O-N) and interstitial nitrogen (O-Ti-N). Silver species could be in the form of Ag0 and Ag2O. The photocatalytic performance of the photocatalysts coated on stainless steel mesh was investigated by the degradation of aqueous MB and gas phase NH3 under visible LED light illumination for three recycling runs. The highest photocatalytic activity and recyclability were reached in 5% N/Ag-TiO2 showing the efficiency of 98.82% for methylene blue (MB) dye degradation and 37.5% for NH3 removal in 6 h, which was 2.7 and 4.3 times, respectively. This is greater than that of pure TiO2. This was due to the synergistic effect of N and Ag doping.
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15
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Valero R, Morales-García Á, Illas F. Investigating the character of excited states in TiO2 nanoparticles from topological descriptors: implications for photocatalysis. Phys Chem Chem Phys 2020; 22:3017-3029. [DOI: 10.1039/c9cp05526f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Excited state topological descriptors based on the attachment/detachment one-electron charge density are used to investigate the centroids of photoactive TiO2 nanoclusters and nanoparticles.
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Affiliation(s)
- Rosendo Valero
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Ángel Morales-García
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
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16
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Lee TY, Lee CY, Chiu HT. Vapor-Solid Reaction Growth of Rutile TiO 2 Nanorods and Nanowires for Li-Ion-Battery Electrodes. ACS OMEGA 2019; 4:16217-16225. [PMID: 31592488 PMCID: PMC6777121 DOI: 10.1021/acsomega.9b02453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 09/03/2019] [Indexed: 06/10/2023]
Abstract
A new synthetic method to grow O-deficient rutile TiO2(s) nanorods (NRs) and nanowires (NWs) by a vapor-solid reaction growth method is developed. TiCl4(g) was employed to react with commercially supplied CaTiO3(s) (size 2-4 μm) at 973 K under atmospheric pressure to generate TiO2(s) NRs (diameters 80-120 nm, lengths 1-4 μm). The reaction employing TiCl4(g) and CaO(s) at 973 K also generated CaTiO3(s) (size 4-13 μm) as the intermediate which reacted further with TiCl4(g) to produce NWs (diameters 80-120 nm, lengths 4-15 μm). This is the first report of 1D rutile TiO2(s) nanostructure with such a high aspect ratio. Both of the NRs and the NWs, with compositions TiO1.81 and TiO1.65, respectively, were single crystals grown in the [001] direction. Their morphology was affected by the reaction temperature, the concentration of TiCl4(g), and the particle size of CaTiO3(s). The NRs and the NWs were investigated as anode materials for Li+-ion batteries. At constant current rates 1, 2, and 5 C (1 C = 170 mA g-1) for 100 cycles, the cycling (1.0-3.0 V) performance data of the NRs were 146, 123, and 104 mA h g-1, respectively. On the other hand, the cycling performance data of the NWs were 120, 80, and 52 mA h g-1, respectively. This is attributed to the high Li+ ion diffusion rate (D Li+ ) of the NRs (29.52 × 10-15 cm2 s-1), which exceeds that of the NWs (8.61 × 10-15 cm2 s-1). Although the [001] growth direction of the NR crystals would provide the fastest channels for the diffusion of Li+ ions and enhance the battery capacity, the extremely long channels in the NWs could hamper the diffusion of the Li+ ions. The O-deficiency in the structure would increase the conductivity of the electrode material and improve the stable cycling stability of the batteries also. The long-term cycling test at 2 C for the battery constructed from the NRs retained 121 mA h g-1 after 200 cycles and 99.2 mA h g-1 after 800 cycles. The device has an excellent long-term cycling stability with a loss of only 0.04% per cycle.
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Affiliation(s)
- Tzu-Yuan Lee
- Department
of Applied Chemistry, National Chiao Tung
University, Hsinchu, Taiwan 30010, R. O. C
| | - Chi-Young Lee
- Department
of Materials Science and Engineering, National
Tsing Hua University, Hsinchu, Taiwan 30013, R. O. C
| | - Hsin-Tien Chiu
- Department
of Applied Chemistry, National Chiao Tung
University, Hsinchu, Taiwan 30010, R. O. C
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17
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He J, Du YE, Bai Y, An J, Cai X, Chen Y, Wang P, Yang X, Feng Q. Facile Formation of Anatase/Rutile TiO 2 Nanocomposites with Enhanced Photocatalytic Activity. Molecules 2019; 24:molecules24162996. [PMID: 31430852 PMCID: PMC6719911 DOI: 10.3390/molecules24162996] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/13/2019] [Accepted: 08/16/2019] [Indexed: 11/16/2022] Open
Abstract
Anatase/rutile mixed-phase TiO2 nanoparticles were synthesized through a simple sol-gel route with further calcination using inexpensive titanium tetrachloride as a titanium source, which effectively reduces the production cost. The structural and optical properties of the prepared materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-vis adsorption. The specific surface area was also analyzed by Brunauer-Emmett-Teller (BET) method. The anatase/rutile mixed-phase TiO2 nanocomposites containing of rod-like, cuboid, and some irregularly shaped anatase nanoparticles (exposed {101} facets) with sizes ranging from tens to more than 100 nanometers, and rod-like rutile nanoparticles (exposed {110} facets) with sizes ranging from tens to more than 100 nanometers. The photocatalytic activities of the obtained anatase/rutile mixed-phase TiO2 nanoparticles were investigated and compared by evaluating the degradation of hazardous dye methylene blue (MB) under ultraviolet light illumination. Compared to the commercial Degussa P25-TiO2, the mixed-phase TiO2 nanocomposites show better photocatalytic activity, which can be attributed to the optimal anatase to rutile ratio and the specific exposed crystal surface on the surface. The anatase/rutile TiO2 nanocomposites obtained at pH 1.0 (pH1.0-TiO2) show the best photocatalytic activity, which can be attributed to the optimal heterojunction structure, the smaller average particle size, and the presence of a specific exposed crystal surface. The enhanced photocatalytic activity makes the prepared anatase/rutile TiO2 photocatalysts a potential candidate in the removal of the organic dyes from colored wastewater.
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Affiliation(s)
- Jing He
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Yi-En Du
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China.
| | - Yang Bai
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Jing An
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Xuemei Cai
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Yongqiang Chen
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China.
| | - Pengfei Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Xiaojing Yang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Qi Feng
- Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi 761-0396, Japan
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18
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Du Y, Niu X, Bai Y, Qi H, Guo Y, Chen Y, Wang P, Yang X, Feng Q. Synthesis of Anatase TiO
2
Nanocrystals with Defined Morphologies from Exfoliated Nanoribbons: Photocatalytic Performance and Application in Dye‐sensitized Solar Cell. ChemistrySelect 2019. [DOI: 10.1002/slct.201900257] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yi‐en Du
- School of Chemistry & Chemical EngineeringJinzhong University, Jinzhong, Shanxi 030619 P. R. China
- Beijing Key Laboratory of Energy Conversion and Storage MaterialsCollege of ChemistryBeijing Normal University, Beijing, 100875 China
- Department of Advanced Materials ScienceFaculty of Engineering, Kagawa University, 2217–20 Hayashi-cho, Takamatsu-shi 761-0396 Japan
| | - Xianjun Niu
- School of Chemistry & Chemical EngineeringJinzhong University, Jinzhong, Shanxi 030619 P. R. China
| | - Yang Bai
- School of Chemistry & Chemical EngineeringJinzhong University, Jinzhong, Shanxi 030619 P. R. China
| | - Hongxue Qi
- School of Chemistry & Chemical EngineeringJinzhong University, Jinzhong, Shanxi 030619 P. R. China
| | - Yanqing Guo
- School of Chemistry & Chemical EngineeringJinzhong University, Jinzhong, Shanxi 030619 P. R. China
| | - Yongqiang Chen
- School of Chemistry & Chemical EngineeringJinzhong University, Jinzhong, Shanxi 030619 P. R. China
| | - Pengfei Wang
- State Key Laboratory of Coal ConversionInstitute of Coal ChemistryChinese Academy of Sciences, Taiyuan, Shanxi 030001 P. R. China
| | - Xiaojing Yang
- Beijing Key Laboratory of Energy Conversion and Storage MaterialsCollege of ChemistryBeijing Normal University, Beijing, 100875 China
| | - Qi Feng
- Department of Advanced Materials ScienceFaculty of Engineering, Kagawa University, 2217–20 Hayashi-cho, Takamatsu-shi 761-0396 Japan
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19
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Di Liberto G, Tosoni S, Pacchioni G. Nitrogen doping in coexposed (001)–(101) anatase TiO2 surfaces: a DFT study. Phys Chem Chem Phys 2019; 21:21497-21505. [DOI: 10.1039/c9cp03930a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The synergic effect of doping and heterojunctions in photoactive anatase TiO2 nanocomposites: a hybrid DFT study.
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Affiliation(s)
- Giovanni Di Liberto
- Dipartimento di Scienza dei Materiali
- Università degli Studi di Milano-Bicocca
- I-20125 Milano
- Italy
| | - Sergio Tosoni
- Dipartimento di Scienza dei Materiali
- Università degli Studi di Milano-Bicocca
- I-20125 Milano
- Italy
| | - Gianfranco Pacchioni
- Dipartimento di Scienza dei Materiali
- Università degli Studi di Milano-Bicocca
- I-20125 Milano
- Italy
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