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Du Y, Niu X, Zhang C, Li X, Cai X, Guo Y, Wang P. FacileSynthesis of Anatase TiO
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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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Photocatalytic Inactivation of Plant Pathogenic Bacteria Using TiO 2 Nanoparticles Prepared Hydrothermally. NANOMATERIALS 2020; 10:nano10091730. [PMID: 32878343 PMCID: PMC7558638 DOI: 10.3390/nano10091730] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 08/18/2020] [Accepted: 08/24/2020] [Indexed: 02/05/2023]
Abstract
Exploitation of engineered nanomaterials with unique properties has been dynamically growing in numerous fields, including the agricultural sector. Due to the increasing resistance of phytopathogenic microbes, human control over various plant pathogens in crop production is a big challenge and requires the development of novel antimicrobial materials. Photocatalytic active nanomaterials could offer an alternative solution to suppress the plant pathogens. In this work, titanium dioxide nanoparticles (TiO2 NPs) with high photocatalytic activity were synthesized by hydrothermal post-treatment of amorphous titania at different temperatures (250 °C or 310 °C) without using any additives or doping agents. The obtained samples were investigated through X-ray diffraction, N2-sorption measurements, diffuse reflectance UV-Vis spectroscopy, transmission electron microscopy, electron paramagnetic resonance spectroscopy, and X-ray photoelectron spectroscopy. The applied hydrothermal treatment led to the formation of TiO2 nanocrystallites with a predominant anatase crystal phase, with increasing crystallinity and crystallite size by prolonging treatment time. The photocatalytic activity of the TiO2 NPs was tested for the photo-degradation of phenol and applied for the inactivation of various plant pathogens such as Erwinia amylovora, Xanthomonas arboricola pv. juglandis, Pseudomonas syringae pv. tomato and Allorhizobium vitis. The studied bacteria showed different susceptibilities; their living cell numbers were quickly and remarkably reduced by UV-A-irradiated TiO2 NPs. The effectiveness of the most active sample prepared at 310 °C was much higher than that of commercial P25 TiO2. We found that fine-tuning of the structural properties by modulating the time and temperature of the hydrothermal treatment influenced the photocatalytic properties of the TiO2 NPs considerably. This work provides valuable information to the development of TiO2-based antimicrobial photocatalysts.
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Impact of the absolute rutile fraction on TiO2 visible-light absorption and visible-light-promoted photocatalytic activity. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111940] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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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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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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Bahadori E, Compagnoni M, Tripodi A, Freyria F, Armandi M, Bonelli B, Ramis G, Rossetti I. Photoreduction of nitrates from waste and drinking water. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.06.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ma Y, Wang X, Ning P, Cheng J, Hu Y. Effects of structures and surface species over Al–Ti–Ox catalysts on removal of HCN. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tobaldi DM, Hortigüela Gallo MJ, Otero-Irurueta G, Singh MK, Pullar RC, Seabra MP, Labrincha JA. Purely Visible-Light-Induced Photochromism in Ag-TiO 2 Nanoheterostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4890-4902. [PMID: 28463002 DOI: 10.1021/acs.langmuir.6b04474] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report titania nanoheterostructures decorated with silver, exhibiting tuneable photochromic properties for the first time when stimulated only by visible white light (domestic indoor lamp), with no UV wavelengths. Photochromic materials show reversible color changes under light exposure. However, all inorganic photochromic nanoparticles (NPs) require UV light to operate. Conventionally, multicolor photochromism in Ag-TiO2 films involves a change in color to brownish-gray during UV-light irradiation (i.e., reduction of Ag+ to Ag0) and a (re)bleaching (i.e., (re)oxidation of Ag0 to colorless Ag+) upon visible-light exposure. In this work, on the contrary, we demonstrate visible-light-induced photochromism (ranging from yellow to violet) of 1-10 mol % Ag-modified titania NPs using both spectroscopic and colorimetric CIEL*a*b* analyses. This is not a bleaching of the UV-induced color but a change in color itself under exposure to visible light, and it is shown to be a completely different mechanism-driven by the interfacial charge transfer of an electron from the valence band of TiO2 to that of the AgxO clusters that surround the titania-to the usual UV-triggered photochromism reported in titania-based materials. The quantity of Ag or irradiation time dictated the magnitude and degree of tuneability of the color change, from pale yellow to dark blue, with a rapid change visible only after a few seconds, and the intensity and red shift of surface plasmon resonance induced under visible light also increased. This effect was reversible after annealing in the dark at 100 °C/15 min. Photocatalytic activity under visible light was also assessed against the abatement of nitrogen oxide pollutants, for interior use, therefore showing the coexistence of photochromism and photocatalysis-both triggered by the same wavelength-in the same material, making it a multifunctional material. Moreover, we also demonstrate and explain why X-ray photoelectron spectroscopy is an unreliable technique with such materials.
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Affiliation(s)
- D M Tobaldi
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - M J Hortigüela Gallo
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - G Otero-Irurueta
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - M K Singh
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - R C Pullar
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - M P Seabra
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - J A Labrincha
- Department of Materials and Ceramic Engineering/CICECO-Aveiro Institute of Materials and ‡Center for Mechanical Technology and Automation-TEMA, Department of Mechanical Engineering, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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Ramana EV, Prasad NV, Tobaldi DM, Zavašnik J, Singh MK, Hortigüela MJ, Seabra MP, Prasad G, Valente MA. Effect of samarium and vanadium co-doping on structure, ferroelectric and photocatalytic properties of bismuth titanate. RSC Adv 2017. [DOI: 10.1039/c7ra00021a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A systematic analysis of the structure, ferroelectricity and photocatalytic activity (PCA) of Sm and V modified Bi4Ti3O12 was performed. Highly reproducible gas–solid phase PCA of NOx abatement and improved ferroelectricity were achieved.
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Affiliation(s)
- E. Venkata Ramana
- I3N-Aveiro
- Department of Physics
- University of Aveiro
- Aveiro-3810 193
- Portugal
| | - N. V. Prasad
- Materials Research Laboratory
- Department of Physics
- Osmania University
- Hyderabad-500 007
- India
| | - David Maria Tobaldi
- Department of Materials and Ceramics Engineering/CICECO
- University of Aveiro
- Aveiro-3810 193
- Portugal
| | - Janez Zavašnik
- Jožef Stefan Institute
- Centre for Electron Microscopy and Microanalysis
- 1000 Ljubljana
- Slovenia
| | - M. K. Singh
- Centre for Mechanical Technology and Automation (TEMA)
- Department of Mechanical Engineering
- University of Aveiro
- Aveiro-3810 193
- Portugal
| | - María Jésus Hortigüela
- Centre for Mechanical Technology and Automation (TEMA)
- Department of Mechanical Engineering
- University of Aveiro
- Aveiro-3810 193
- Portugal
| | - M. P. Seabra
- Department of Materials and Ceramics Engineering/CICECO
- University of Aveiro
- Aveiro-3810 193
- Portugal
| | - G. Prasad
- Materials Research Laboratory
- Department of Physics
- Osmania University
- Hyderabad-500 007
- India
| | - M. A. Valente
- I3N-Aveiro
- Department of Physics
- University of Aveiro
- Aveiro-3810 193
- Portugal
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Seifvand N, Kowsari E. Synthesis of Mesoporous Pd-Doped TiO2 Templated by a Magnetic Recyclable Ionic Liquid for Efficient Photocatalytic Air Treatment. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02783] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Naemeh Seifvand
- Department
of Chemistry, Amirkabir University of Technology, Hafez Avenue, No. 424, Tehran, Iran
| | - Elaheh Kowsari
- Department
of Chemistry, Amirkabir University of Technology, Hafez Avenue, No. 424, Tehran, Iran
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