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Pugazhenthiran N, Valdés H, Mangalaraja RV, Sathishkumar P, Murugesan S. Graphene modified “black {0 0 1}TiO2” nanosheets for photocatalytic oxidation of ethylene: The implications of chemical surface characteristics in the reaction mechanism. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Tu Y, Chu W, Shi Y, Zhu W, Zheng Q, Zhao J. High Photoreactivity on a Reconstructed Anatase TiO 2(001) Surface Predicted by Ab Initio Nonadiabatic Molecular Dynamics. J Phys Chem Lett 2022; 13:5766-5775. [PMID: 35723976 DOI: 10.1021/acs.jpclett.2c01417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Anatase TiO2(001) surface with (4 × 1) reconstruction is proposed to be a highly active catalytic surface. In this work, using time-domain ab initio nonadiabatic molecular dynamics, we reveal that the ridge structure formed by anatase(001) surface reconstruction is the photoreactive site for hole migration and trapping. Moreover, the ridge structure is destroyed by low-coverage CH3OH adsorption, leading to the suppression of its high photoreactivity. However, when the CH3OH coverage is increased and intermolecular hydrogen bonds (H-bonds) form, the ridge structure and its high photoreactivity are restored. Furthermore, the hole trapping dynamics is strongly coherent with intermolecular proton transfer in structures with intermolecular H-bonds. Our study proves that anatase TiO2(001)-(4 × 1) is a highly photoreactive surface where the ridge is the photoreactive site for hole trapping, which is coherent with the proton transfer process.
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Affiliation(s)
- Youyou Tu
- Department of Physics and ICQD/Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Weibin Chu
- Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, Fudan University, Shanghai 200433, People's Republic of China
| | - Yongliang Shi
- Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shanxi 710049, China
| | - Wenguang Zhu
- Department of Physics and ICQD/Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qijing Zheng
- Department of Physics and ICQD/Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jin Zhao
- Department of Physics and ICQD/Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Physics and ICQD/Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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3
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Adsorption and Mechanism of Glycine on the Anatase with Exposed (001) and (101) Facets. MINERALS 2022. [DOI: 10.3390/min12070798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
As a widely existing mineral types on Earth, semiconductor minerals play an important role in the origin of life and the material geochemical cycle. The first step of peptide formation is amino acid adsorption on the mineral surface, but the role and mechanism of different crystal facets of semiconductor minerals are not well understood. Anatase (TiO2) with exposed (001) facets was synthesized by a hydrothermal method, and then analyzed and compared with the purchased ordinary anatase (TiO2) for the adsorption of glycine, the simplest amino acid. XRD, SEM and TEM results show that the hydrothermally synthesized anatase (TiO2) has a good anatase crystal form, which is micro-nano-scale flake particles and mainly composed of (001) facets. The results of HPLC used in the adsorption experiment showed that under optimal conditions (pH 5 to 6, an adsorption time of 24 h, and an initial concentration of 0.09 mol/L), the adsorption quantity of glycine on anatase (TiO2) with exposed (001) facets may reach 10 mg/m2, which is larger than that for ordinary anatase (TiO2) with exposed (101) facets. Based on a combination of various characterizations and simulation calculations, the results proved that anatase can activate thermodynamically stable γ-glycine to β-glycine. The adsorption of glycine on anatase (TiO2) has two forms, one is the zwitterionic form in which the carboxyl group forms a bridge structure with two Ti atoms connected by surface bridging oxygen, and the dissociated form is in which the amino group forms a bond with the surface Ti atom. Among these, glycine is mainly adsorbed to anatase by dissociative molecules on the anatase (TiO2) with exposed (001) facets and by zwitterion adsorption on the anatase (TiO2) with exposed (101) facets. This research elucidates the conditions and mechanism of amino acid adsorption by semiconductor minerals in weak acidic environment, which is similar to the environmental pH that was beneficial to the formation of life on the early Earth. Therefore, these can provide a reference for the further study of the role of semiconductor minerals in the adsorption and polymerization of small biomolecules in the origin of life.
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Qin S, Shui L, Osuagwu B, Denisov N, Tesler AB, Schmuki P. Facet-Control versus Co-Catalyst-Control in Photocatalytic H 2 Evolution from Anatase TiO 2 Nanocrystals. Chemistry 2022; 11:e202200010. [PMID: 35112801 PMCID: PMC8889503 DOI: 10.1002/open.202200010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 01/19/2022] [Indexed: 11/16/2022]
Abstract
Titanium dioxide (TiO2) and, in particular, its anatase polymorph, is widely studied for photocatalytic H2 production. In the present work, we examine the importance of reactive facets of anatase crystallites on the photocatalytic H2 evolution from aqueous methanol solutions. For this, we synthesized anatase TiO2 nanocrystals with a large amount of either {001} facets, that is, nanosheets, or {101} facets, that is, octahedral nanocubes, and examined their photocatalytic H2 evolution and then repeated this procedure with samples where Pt co‐catalyst is present on all facets. Octahedral nanocubes with abundant {101} facets produce >4 times more H2 than nanosheets enriched in {001} facets if the reaction is carried out under co‐catalyst‐free conditions. For samples that carry Pt co‐catalyst on both {001} and {101} facets, faceting loses entirely its significance. This demonstrates that the beneficial role of faceting, namely the introduction of {101} facets that act as electron transfer mediator is relevant only for co‐catalyst‐free TiO2 surfaces.
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Affiliation(s)
- Shanshan Qin
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Lancang Shui
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Benedict Osuagwu
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Nikita Denisov
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Alexander B Tesler
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Patrik Schmuki
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany.,Chemistry Department, King Abdulaziz University, 80203, Jeddah, Saudi Arabia Kingdom.,Regional Centre of Advanced Technologies and Materials, Palacky University, Listopadu 50 A, 772 07, Olomouc, Czech Republic
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Kohlrausch EC, Dos Reis R, Lodge RW, Vicente I, Brolo AG, Dupont J, Alves Fernandes J, Santos MJL. Selective suppression of {112} anatase facets by fluorination for enhanced TiO 2 particle size and phase stability at elevated temperatures. NANOSCALE ADVANCES 2021; 3:6223-6230. [PMID: 36133950 PMCID: PMC9419165 DOI: 10.1039/d1na00528f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 08/26/2021] [Indexed: 06/16/2023]
Abstract
Generally, anatase is the most desirable TiO2 polymorphic phase for photovoltaic and photocatalytic applications due to its higher photoconductivity and lower recombination rates compared to the rutile phase. However, in applications where temperatures above 500 °C are required, growing pure anatase phase nanoparticles is still a challenge, as above this temperature TiO2 crystallite sizes are larger than 35 nm which thermodynamically favors the growth of rutile crystallites. In this work, we show strong evidence, for the first time, that achieving a specific fraction (50%) of the {112} facets on the TiO2 surface is the key limiting step for anatase-to-rutile phase transition, rather than the crystallite size. By using a fluorinated ionic liquid (IL) we have obtained pure anatase phase crystallites at temperatures up to 800 °C, even after the crystallites have grown beyond their thermodynamic size limit of ca. 35 nm. While fluorination by the IL did not affect {001} growth, it stabilized the pure anatase TiO2 by suppressing the formation of {112} facets on anatase particles. By suppressing the {112} facets, using specific concentrations of fluorinated ionic liquid in the TiO2 synthesis, we controlled the anatase-to-rutile phase transition over a wide range of temperatures. This information shall help synthetic researchers to determine the appropriate material conditions for specific applications.
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Affiliation(s)
- Emerson C Kohlrausch
- Instituto de Química - UFRGS 91501-970 Porto Alegre RS Brazil
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Roberto Dos Reis
- Department of Materials Science and Engineering, Northwestern University Evanston Illinois 60208 USA
| | - Rhys W Lodge
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
| | - Isabel Vicente
- Unitat de Tecnologíe Químiques, EURECAT Tarragona 43007 Spain
| | - Alexandre G Brolo
- Department of Chemistry, University of Victoria P. O. Box 3065 V8W 3V6 BC Canada
| | - Jairton Dupont
- Instituto de Química - UFRGS 91501-970 Porto Alegre RS Brazil
| | - Jesum Alves Fernandes
- School of Chemistry, University of Nottingham, University Park Nottingham NG7 2RD UK
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Paumo HK, Dalhatou S, Katata-Seru LM, Kamdem BP, Tijani JO, Vishwanathan V, Kane A, Bahadur I. TiO2 assisted photocatalysts for degradation of emerging organic pollutants in water and wastewater. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115458] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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7
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Synthesis and characterization of TiO2-based nanostructures via fluorine-free solvothermal method for enhancing visible light photocatalytic activity: Experimental and theoretical approach. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112834] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Thesing A, Damiani EJ, Loguercio LF, Demingos PG, Muniz AR, Carreño NLV, Khan S, Santos MJL, Brolo AG, Santos JFL. Peering into the Formation of Template-Free Hierarchical Flowerlike Nanostructures of SrTiO 3. ACS OMEGA 2020; 5:33007-33016. [PMID: 33403262 PMCID: PMC7774077 DOI: 10.1021/acsomega.0c04343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
The development of efficient advanced functional materials is highly dependent on properties such as morphology, crystallinity, and surface functionality. In this work, hierarchical flowerlike nanostructures of SrTiO3 have been synthesized by a simple template-free solvothermal method involving poly(vinylpyrrolidone) (PVP). Molecular dynamics simulations supported by structural characterization have shown that PVP preferentially adsorbs on {110} facets, thereby promoting the {100} facet growth. This interaction results in the formation of hierarchical flowerlike nanostructures with assembled nanosheets. The petal morphology is strongly dependent on the presence of PVP, and the piling up of nanosheets, leading to nanocubes, is observed when PVP is removed at high temperatures. This work contributes to a better understanding of how to control the morphological properties of SrTiO3, which is fundamental to the synthesis of perovskite-type materials with tailored properties.
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Affiliation(s)
- Anderson Thesing
- Centro
de Tecnologias Estratégicas do Nordeste, Av. Prof. Luís Freire 1, Recife, Pernambuco 50740-545, Brazil
| | - Eduardo J. Damiani
- Instituto
de Química, Universidade Federal
do Rio Grande do Sul, Av. Bento Gonçalves 9500, CP 15003, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Lara F. Loguercio
- Programa
de Pós-graduação em Ciência dos Materiais, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500,
CP 15003, Porto Alegre, Rio
Grande do Sul 91501-970, Brazil
| | - Pedro G. Demingos
- Departamento
de Engenharia Química, Universidade
Federal do Rio Grande do Sul, Rua Engenheiro Luiz Englert s/n, Porto Alegre, Rio Grande do Sul 90040-040, Brazil
| | - André R. Muniz
- Departamento
de Engenharia Química, Universidade
Federal do Rio Grande do Sul, Rua Engenheiro Luiz Englert s/n, Porto Alegre, Rio Grande do Sul 90040-040, Brazil
| | - Neftali L. V. Carreño
- Centro
de Desenvolvimento Tecnológico, Universidade
Federal de Pelotas, Rua
Gomes Carneiro 1, Pelotas, Rio Grande do Sul 96010-610, Brazil
| | - Sherdil Khan
- Instituto
de Física, Universidade Federal do
Rio Grande do Sul, Av. Bento Gonçalves 9500, CP 15003, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Marcos J. L. Santos
- Instituto
de Química, Universidade Federal
do Rio Grande do Sul, Av. Bento Gonçalves 9500, CP 15003, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Alexandre G. Brolo
- Department
of Chemistry and Center for Advanced Materials and Related Technologies, University of Victoria, P.O. Box 3065, Victoria, British Columbia V8W 3V6, Canada
| | - Jacqueline F. L. Santos
- Instituto
de Química, Universidade Federal
do Rio Grande do Sul, Av. Bento Gonçalves 9500, CP 15003, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
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9
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Jin YS, Wang P, Teng SH. Hexafluorotitanic acid-assisted synthesis of large-sized, ultrathin titania nanosheets as multifunctional and high-performance photocatalysts. NANOTECHNOLOGY 2020; 31:405605. [PMID: 32554895 DOI: 10.1088/1361-6528/ab9da6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A fast cyclohexanol solvothermal pathway was developed to prepare highly dispersed anatase titania (TiO2) nanosheets with an edge length of ∼800 nm and a thickness of ∼6 nm. Under the synergistic control of hexafluorotitanic acid and cyclohexanol, the exposed 001 facets reached ∼98.5% on the TiO2 nanosheets obtained by the treatment at 180 °C for 150 min. Moreover, it was found that the phase transformation and structural development drastically occurred during the solvothermal treatment. When used as a catalyst for photodegradation of rhodamine B, the TiO2 nanosheets exhibited a good recycling stability and a much higher photocatalytic degradation rate (nearly 99% degradation within 2.5 h) than the commercial P25 (93.6%). After being uniformly loaded with 4 wt.% of the Pt nanoparticles, the TiO2 nanosheets displayed a photocatalytic hydrogen production rate of 2.239 mmol g-1 h-1 under simulated solar light, which was much higher than the pristine TiO2 nanosheets (0.045 mmol g-1 h-1) as well as most of the reported TiO2-based photocatalysts. The remarkable photocatalytic activity and good stability of the TiO2 nanosheets with highly exposed 001 facets would make them find potential applications in both water treatment and hydrogen generation from water splitting under solar light.
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Affiliation(s)
- Yong-Sheng Jin
- School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, Jiangsu, People's Republic of China
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10
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Dai W, Tao Y, Zou H, Xiao S, Li G, Zhang D, Li H. Gas-Phase Photoelectrocatalytic Oxidation of NO via TiO 2 Nanorod Array/FTO Photoanodes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:5902-5912. [PMID: 32250099 DOI: 10.1021/acs.est.9b07757] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Most photoelectrocatalytic (PEC) reactions are performed in the liquid phase for convenient electron transfer in an electrolyte solution. Herein, a novel PEC reactor involving a tandem combination of TiO2 nanorod array/fluorine-doped tin oxide (TiO2-NR/FTO) working electrodes and an electrochemical auxiliary cell was constructed to drive the highly efficient PEC oxidation of indoor gas (NOx). With the aid of a low bias voltage (0.3 V), the as-formed PEC reactor exhibited an 80% removal rate for oxidizing NO (500 ppb) under light irradiation, which is much higher than that of the traditional photocatalytic (PC) process. Upon being irradiated by light, the photogenerated electrons are quickly separated from the holes and transferred to the counter electrode (Pt) owing to the applied bias voltage, leaving photogenerated holes in the TiO2-NR/FTO electrode for oxidizing NO molecules. Moreover, both dry and humid NO could be effectively removed by the tandem TiO2-NR/FTO-based gas-phase PEC reactor, indicating that the NO molecules could also be directly oxidized by photogenerated holes in addition to hydroxyl radicals. The presence of trace amounts of water could promote the PEC oxidation of NO owing to the formation of hydroxyl radicals induced by reactions between the water and holes, which could further oxidize NO. This PEC reactor offers an energy-saving, environmentally friendly, and efficient route to treat air polluted with low concentrations of gases (NOx and SOx).
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Affiliation(s)
- Wenrui Dai
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Ying Tao
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Hangjun Zou
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Shuning Xiao
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Guisheng Li
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Dieqing Zhang
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Hexing Li
- Chinese Education Ministry Key Lab and International Joint Lab of Resource Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China
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He Y, Yan Q, Liu X, Dong M, Yang J. Effect of annealing on the structure, morphology and photocatalytic activity of surface-fluorinated TiO2 with dominant {001} facets. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112400] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Hayashi K, Nozaki K, Tan Z, Fujita K, Nemoto R, Yamashita K, Miura H, Itaka K, Ohara S. Enhanced Antibacterial Property of Facet-Engineered TiO 2 Nanosheet in Presence and Absence of Ultraviolet Irradiation. MATERIALS (BASEL, SWITZERLAND) 2019; 13:E78. [PMID: 31877887 PMCID: PMC6981437 DOI: 10.3390/ma13010078] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/17/2019] [Accepted: 12/18/2019] [Indexed: 01/25/2023]
Abstract
Titania (TiO2) has attracted much attention recently for reducing bacterial diseases by the generation of reactive oxygen species (ROS) under UV irradiation. However, demand for higher photocatalytic activity due to higher recombination of electron and hole remains. The aims of this study were to make titania with higher antibacterial property and show the mechanisms of the bactericidal effect. In this study, we hydrothermally synthesized TiO2 nanosheets (NS) with highly-oriented structures. Samples were divided into five groups, depending on the fluorine/titanium ratio in the raw material, namely NS1.0, NS1.2, NS1.5, NS1.8, and NS2.0. Facet ratio and nanosheet size increased with an increase of fluorine/titanium ratio. The photocatalytic activity of TiO2 nanosheet was assessed by the generation of ROS. Hydroxyl radicals and superoxides were generated efficiently by ultraviolet light irradiation on NS1.5 and NS1.0, respectively. Antibacterial activity against Streptococcus mutans was assessed in the presence and absence of UV irradiation; NS1.0 showed superior antibacterial properties compared to commercially available TiO2 nanoparticles, under both conditions, due to the oxidation of intracellular components and cell membrane. These results together suggested TiO2 nanosheet induced bacterial cell death by oxidation, and TiO2 facet engineering resulted in enhancement of both photocatalytic and antibacterial activities of TiO2.
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Affiliation(s)
- Kenichiro Hayashi
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Kosuke Nozaki
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Zhenquan Tan
- State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Kazuhisa Fujita
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Reina Nemoto
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Kimihiro Yamashita
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Hiroyuki Miura
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan; (K.H.); (K.F.); (R.N.); (K.Y.); (H.M.)
| | - Keiji Itaka
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Satoshi Ohara
- Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;
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Wilczewska P, Bielicka-Giełdoń A, Borzyszkowska AF, Ryl J, Klimczuk T, Siedlecka EM. Photocatalytic activity of solvothermal prepared BiOClBr with imidazolium ionic liquids as a halogen sources in cytostatic drugs removal. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111932] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Effect of Surface Chemistry and Crystallographic Parameters of TiO2 Anatase Nanocrystals on Photocatalytic Degradation of Bisphenol A. Catalysts 2019. [DOI: 10.3390/catal9050447] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The photocatalytic activity of a series of anatase TiO2 materials with different amounts of exposed (001) facets (i.e., 12% (TiO2-1), 38% (TiO2-3), and 63% (TiO2-3)) was tested in a batch slurry reactor towards liquid-phase bisphenol A (BPA, c0(BPA) = 10 mg/L, ccat. = 125 mg/L) degradation. Photo-electrochemical and photo-luminescence measurements revealed that with the increasing amount of exposed anatase (001) facets, the catalysts generate more electron-hole pairs and OH∙ radicals that participate in the photocatalytic mineralization of pollutants dissolved in water. In the initial stages of BPA degradation, a correlation between % exposure of (001) facets and catalytic activity was developed, which was in good agreement with the findings of the photo-electrochemical and photo-luminescence measurements. TiO2-1 and TiO2-3 solids achieved 100% BPA removal after 80 min in comparison to the TiO2-2 sample. Adsorption of BPA degradation products onto the TiO2-2 catalyst surface was found to have a detrimental effect on the photocatalytic performance in the last stage of the reaction course. Consequently, the global extent of BPA mineralization decreased with the increasing exposure of anatase (001) facets. The major contribution to the enhanced reactivity of TiO2 anatase (001) surface is the Brønsted acidity resulting from dissociative chemisorption of water on a surface as indicated by FTIR, TPD, and MAS NMR analyses.
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15
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Fabrication of CdS quantum dots sensitized ZnO nanorods/TiO2 nanosheets hierarchical heterostructure films for enhanced photoelectrochemical performance. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.022] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Wang Y, Hou Q, Ju M, Li W. New Developments in Material Preparation Using a Combination of Ionic Liquids and Microwave Irradiation. NANOMATERIALS 2019; 9:nano9040647. [PMID: 31013641 PMCID: PMC6523822 DOI: 10.3390/nano9040647] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/11/2019] [Accepted: 04/16/2019] [Indexed: 12/24/2022]
Abstract
During recent years, synthetic methods combining microwaves and ionic liquids became accepted as a promising methodology for various materials preparations because of their high efficiency and low energy consumption. Ionic liquids with high polarity are heated rapidly, volumetrically and simultaneously under microwave irradiation. Hence, combination of microwave irradiation as a heating source with ionic liquids with various roles (e.g., solvent, additive, template or reactant) opened a completely new technique in the last twenty years for nanomaterials and polymers preparation for applications in various materials science fields including polymer science. This review summarizes recent developments of some common materials syntheses using microwave-assisted ionic liquid method with a focus on inorganic nanomaterials, polymers, carbon-derived composites and biomass-based composites. After that, the mechanisms involved in microwave-assisted ionic-liquid (MAIL) are discussed briefly. This review also highlights the role of ionic liquids in the reaction and crucial issues that should be addressed in future research involving this synthesis technique.
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Affiliation(s)
- Yannan Wang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Qidong Hou
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Meiting Ju
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Weizun Li
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
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17
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Wang L, Xie Y, Liu W, Wang Q, Cao W. Synthesis of mesoporous core-shell TiO 2 microstructures with coexposed {001}/{101} facets: enhanced intrinsic photocatalytic performance. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:31250-31261. [PMID: 30194570 DOI: 10.1007/s11356-018-3113-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
TiO2 microstructures were synthesized via a facile one-step route for enhanced intrinsic photocatalytic performance. The prepared TiO2 microstructures are featured by both mesoporous core-shell structures and coexposed {001}/{101} facets. Their intrinsic photocatalytic performance were remarkably enhanced due to their high specific surface area, coexposed {001}/{101} facets, and promoted separation of photogenerated carriers. Furthermore, the origin and detailed mechanism for diethylenetriamine (DETA) that served as a high efficient stabilizer of TiO2 {001} facet have been theoretically investigated. Finally, a new DETA-modified Ostwald ripening mechanism was originally proposed when studying the growth mechanism of the mesoporous core-shell TiO2 spherical microstructures with coexposed {001}/{101} facets.
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Affiliation(s)
- Liang Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yingjuan Xie
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wenxiu Liu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qi Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wenbin Cao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
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18
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Abstract
Abstract
Diatomite was modified with TiO2. The synthesized materials were characterized and used for removal of U(VI) from aqueous solutions. The influences of pH, contact time and temperature on U(VI) adsorption onto TiO2@diatomite were studied by batch technique, and X-ray photoelectron spectroscopy (XPS) was employed to analyze the experimental data. We compared the adsorption of U(VI) onto natural diatomite, TiO2 and TiO2@diatomite made by sol-gel method. The dynamic process showed that the adsorption of U(VI) onto TiO2@diatomite matched the pseudo-second-order kinetics model, and the adsorption of U(VI) was significantly dependent on pH values. Through simulating the adsorption isotherms by Langmuir, Freundlich and Dubini–Radushkevich (D–R) models, respectively, it could be seen that the adsorption patterns of U(VI) onto TiO2@diatomite were mainly controlled by surface complexation, and the adsorption processes were endothermic and spontaneous. The modification of diatomite by TiO2 shows a novel material for removing U(VI) from water environment for industrialized application.
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Affiliation(s)
- Ni Yuan
- Radiochemistry Laboratory , Lanzhou University , Lanzhou 730000 , China
| | - Peng Liu
- Radiochemistry Laboratory , Lanzhou University , Lanzhou 730000 , China
| | - Wangsuo Wu
- Radiochemistry Laboratory , Lanzhou University , Lanzhou 730000 , China
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19
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Ghosh S, Manna L. The Many "Facets" of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals. Chem Rev 2018; 118:7804-7864. [PMID: 30062881 PMCID: PMC6107855 DOI: 10.1021/acs.chemrev.8b00158] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Indexed: 12/11/2022]
Abstract
Over the years, scientists have identified various synthetic "handles" while developing wet chemical protocols for achieving a high level of shape and compositional complexity in colloidal nanomaterials. Halide ions have emerged as one such handle which serve as important surface active species that regulate nanocrystal (NC) growth and concomitant physicochemical properties. Halide ions affect the NC growth kinetics through several means, including selective binding on crystal facets, complexation with the precursors, and oxidative etching. On the other hand, their presence on the surfaces of semiconducting NCs stimulates interesting changes in the intrinsic electronic structure and interparticle communication in the NC solids eventually assembled from them. Then again, halide ions also induce optoelectronic tunability in NCs where they form part of the core, through sheer composition variation. In this review, we describe these roles of halide ions in the growth of nanostructures and the physical changes introduced by them and thereafter demonstrate the commonality of these effects across different classes of nanomaterials.
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Affiliation(s)
- Sandeep Ghosh
- McKetta
Department of Chemical Engineering, The
University of Texas at Austin, Austin, Texas 78712-1589, United States
| | - Liberato Manna
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego 30, I-16163 Genova, Italy
- Kavli Institute
of Nanoscience and Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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20
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Sandhu S, Shahi SK, Singh V. Acidic ionic liquids: an alternative to HF for {001} reactive facet controlled synthesis of anatase titania. NEW J CHEM 2018. [DOI: 10.1039/c8nj01481g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A HF free method for the controlled synthesis of nanosized TiO2 with a higher percentage of {001} reactive facets.
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Affiliation(s)
- Sofia Sandhu
- Department of Applied Sciences (Chemistry)
- Punjab Engineering College (Deemed to be University)
- Chandigarh 160012
- India
| | - Satwant Kaur Shahi
- Department of Applied Sciences (Chemistry)
- Punjab Engineering College (Deemed to be University)
- Chandigarh 160012
- India
| | - Vasundhara Singh
- Department of Applied Sciences (Chemistry)
- Punjab Engineering College (Deemed to be University)
- Chandigarh 160012
- India
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21
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Liu X, Bi Y. Synergistic effect of Ti3+ doping and facet regulation over Ti3+-doped TiO2 nanosheets with enhanced photoreactivity. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01016a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ti3+-doped TiO2 nanosheets with different percentages of exposed {001} facets were synthesized by aluminium (Al) reduction.
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Affiliation(s)
- Xiaogang Liu
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- China
| | - Yingpu Bi
- State Key Laboratory for Oxo Synthesis & Selective Oxidation
- National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- Lanzhou 730000
- China
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22
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Wei Z, Li R, Wang R. Enhanced visible light photocatalytic activity of BiOBr by in situ reactable ionic liquid modification for pollutant degradation. RSC Adv 2018; 8:7956-7962. [PMID: 35542022 PMCID: PMC9078494 DOI: 10.1039/c7ra13779f] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 02/10/2018] [Indexed: 11/25/2022] Open
Abstract
In this study, hierarchical BiOBr microspheres were synthesized via a one-pot solvothermal method in the presence of imidazole ionic liquids. The resultant samples were characterized by XRD, SEM, HRTEM, PL, EPR, EIS and UV-vis absorption spectroscopy. The photoactivity of BiOBr was evaluated by the photocatalytic degradation of methyl orange (MO) and tetracycline hydrochloride. Oxygen vacancies were detected in the system and proven to be correlated with the activity of the catalyst. It was also revealed that BiOBr microspheres prepared by 1-butyl-3-methylimidazolium bromide at 433 K for 8 hours displayed a superior performance compared to the other samples in the degradation of model organic contaminants. After 4.5 hours of reaction, the highest degradation efficiency of 94.0% was achieved by BiOBr-C4-Br. Stronger photoluminescence spectral intensities could be obtained as the cationic chain lengths of the ionic liquids reduced gradually. According to our experiments, the better performance of BiOBr-C4-Br in the degradation of model pollutants can be attributed to the effect of oxygen vacancies. The findings of our work may have important implications for the design of BiOBr. In this study, hierarchical BiOBr microspheres were synthesized via a one-pot solvothermal method in the presence of imidazole ionic liquids.![]()
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Affiliation(s)
- Zhidong Wei
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250199
- P. R. China
| | - Ruishuo Li
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250199
- P. R. China
| | - Rui Wang
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250199
- P. R. China
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23
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Wu D, Wang X, An Y, Song X, Liu N, Wang H, Gao Z, Xu F, Jiang K. Hierarchical TiO2 Structures Derived from F− Mediated Oriented Assembly as Triple-functional Photoanode Material for Improved Performances in CdS/CdSe Sensitized Solar Cells. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.06.150] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Chamtouri M, Kenens B, Aubert R, Lu G, Inose T, Fujita Y, Masuhara A, Hofkens J, Uji-i H. Facet-Dependent Diol-Induced Density of States of Anatase TiO 2 Crystal Surface. ACS OMEGA 2017; 2:4032-4038. [PMID: 28782054 PMCID: PMC5537687 DOI: 10.1021/acsomega.6b00473] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 06/21/2017] [Indexed: 05/13/2023]
Abstract
Owing to their fundamental importance and practical applications, anatase TiO2 crystals with well-defined {001} and {101} facets attracted intensive research interests. In this study, we systematically investigated solvent dependence of the photoreaction of the different coexposed crystal facets during noble metal photodeposition. By examining the deposition position in each solvent, we revealed that solvents play a pivotal role on the facet selectivity. On the basis of density functional theory calculations, the solvent molecules were found to modify both the crystal facet electronic structure and the {001}-{001} heterojunction. These modifications are not only the origin of diverse charge-carrier pathways but are also responsible for carrier accumulation at specific facets that increase their reductive power. These findings are vital for a better understanding of photocatalytic materials and an improved design for the next-generation materials.
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Affiliation(s)
- Maha Chamtouri
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Bart Kenens
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Remko Aubert
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Gang Lu
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
- Nanjing
Tech University, KLOFE, SICAM, 30 South Puzhu Road, Nanjing 211816, Jiangsu, People’s Republic of China
| | - Tomoko Inose
- RIES, Hokkaido University, N20W10, Kita-Ward Sapporo 001-0020, Japan
| | - Yasuhiko Fujita
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Akito Masuhara
- Graduate
School of Science and Engineering, Yamagata
University, 4-13-16, Jonan, Yonezawa 992-8510, Japan
| | - Johan Hofkens
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
- RIES, Hokkaido University, N20W10, Kita-Ward Sapporo 001-0020, Japan
| | - Hiroshi Uji-i
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
- RIES, Hokkaido University, N20W10, Kita-Ward Sapporo 001-0020, Japan
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25
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Shi Y, Sun H, Saidi WA, Nguyen MC, Wang CZ, Ho K, Yang J, Zhao J. Role of Surface Stress on the Reactivity of Anatase TiO 2(001). J Phys Chem Lett 2017; 8:1764-1771. [PMID: 28359150 DOI: 10.1021/acs.jpclett.7b00181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In contrast with theoretical predictions in which anatase TiO2(001) and its (1 × 4) reconstructed surfaces are highly reactive, recent experimental results show this surface to be inert except for the defect sites. In this report, based on a systematic study of anatase TiO2(001)-(1 × 4) surface using first-principles calculations, the tensile stress is shown to play a crucial role on the surface reactivity. The predicted high reactivity based on add-molecule model is due to the large surface tensile stress, which can be easily suppressed by a stress-release mechanism. We show that various surface defects can induce stress release concomitantly with surface passivation. Thus the synthesis of anatase(001) surface with few defects is essential to improve the reactivity, which can be achieved, for example, via H2O adsorption. Our study provides a uniform interpretation of controversial experimental observations and theoretical predictions on anatase TiO2(001) surface and further proposes new insights into the origin of surface reactivity.
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Affiliation(s)
- Yongliang Shi
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale and Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Huijuan Sun
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale and Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- College of Physics, Qingdao University , Qingdao 266071, China
| | - Wissam A Saidi
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States
| | - Manh Cuong Nguyen
- Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - Cai Zhuang Wang
- Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - Kaiming Ho
- Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - Jinlong Yang
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale and Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Jin Zhao
- ICQD/Hefei National Laboratory for Physical Sciences at Microscale and Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, and Department of Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Department of Physics and Astronomy, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
- Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
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26
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Affiliation(s)
- Pascal Voepel
- Institute of Physical Chemistry; Justus-Liebig-University Giessen; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Bernd M. Smarsly
- Institute of Physical Chemistry; Justus-Liebig-University Giessen; Heinrich-Buff-Ring 17 35392 Giessen Germany
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27
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Xu M, Wang S, Wang H. A reconstructed anatase (001)-1 × 4 surface and its reactivity. Phys Chem Chem Phys 2017; 19:16615-16620. [DOI: 10.1039/c7cp03457a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our results solve the atomic structure of anatase (001)-(1 × 4) reconstructed surface, which exhibits enhanced photocatalytic activity.
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Affiliation(s)
- Meiling Xu
- State Key Lab of Superhard Materials and College of Physics
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Sheng Wang
- State Key Lab of Superhard Materials and College of Physics
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Hui Wang
- State Key Lab of Superhard Materials and College of Physics
- Jilin University
- Changchun 130012
- People's Republic of China
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28
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Maitani MM, Tanaka K, Satou H, Oshima T, Ohtomo A, Wada Y. Hetero-epitaxial growth control of single-crystalline anatase TiO2 nanosheets predominantly exposing the {001} facet on oriented crystalline substrates. CrystEngComm 2017. [DOI: 10.1039/c7ce00754j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Well-controlled TiO2 nanosheet growth was achieved by applying a proper crystalline orientation of substrates as a hetero-epitaxial growth strategy.
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Affiliation(s)
- M. M. Maitani
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - K. Tanaka
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - H. Satou
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - T. Oshima
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - A. Ohtomo
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Y. Wada
- School of Materials and Chemical Technology
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
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29
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Han H, Kim KM, Lee CW, Lee CS, Pawar RC, Jones JL, Hong YR, Ryu JH, Song T, Kang SH, Choi H, Mhin S. Few-layered metallic 1T-MoS2/TiO2 with exposed (001) facets: two-dimensional nanocomposites for enhanced photocatalytic activities. Phys Chem Chem Phys 2017; 19:28207-28215. [DOI: 10.1039/c7cp05523d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium dioxide (TiO2) with exposed (001) facets (TiO2(001)) has attractive photocatalytic properties.
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30
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Direct functionalization of the C—H bond in (hetero)arenes: aerobic photoinduced oxidative coupling of azines with aromatic nucleophiles (SN H-reactions) in the presence of a CdS/TiO2 photocatalyst. Russ Chem Bull 2016. [DOI: 10.1007/s11172-016-1319-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Maisano M, Dozzi MV, Selli E. Searching for facet-dependent photoactivity of shape-controlled anatase TiO 2. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2016.07.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Liu X, Dong G, Li S, Lu G, Bi Y. Direct Observation of Charge Separation on Anatase TiO2 Crystals with Selectively Etched {001} Facets. J Am Chem Soc 2016; 138:2917-20. [PMID: 26924454 DOI: 10.1021/jacs.5b12521] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Synchronous illumination X-ray photoelectron spectroscopy (SIXPS) was employed for the first time to directly identify the photogenerated charge separation and transfer on anatase TiO2 single-crystals with selectively etched {001} facets. More specifically, for the TiO2 crystals with intact {001} and {101} facets, most of photogenerated charge carriers rapidly recombined, and no evident electron-hole separation was detected. With selectively etching on {001} facets, high efficient charge separation via hole transfer to titanium and electron to oxygen was clearly observed. However, when the {001} facets were completely etched into a hollow structure, the recombination for photogenerated electron-hole pairs would dominate again. These demonstrations clearly reveal that the appropriate corrosion on {001} facets could facilitate more efficient electron-hole separation and transfer. As expected, the optimized TiO2 microcrystals with etched {001} facets could achieve a hydrogen generation rate of 74.3 μmol/h/g, which is nearly 7 times higher than the intact-TiO2 crystals.
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Affiliation(s)
- Xiaogang Liu
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China
| | - Guojun Dong
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China
| | - Shaopeng Li
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China
| | - Gongxuan Lu
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China
| | - Yingpu Bi
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, China
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33
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Liu J, He Z, Khoo SY, Tan TTY. A new strategy for achieving vertically-erected and hierarchical TiO 2 nanosheets array/carbon cloth as a binder-free electrode for protein impregnation, direct electrochemistry and mediator-free glucose sensing. Biosens Bioelectron 2016; 77:942-9. [DOI: 10.1016/j.bios.2015.10.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/06/2015] [Accepted: 10/26/2015] [Indexed: 10/22/2022]
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34
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Xiao S, Zhu W, Liu P, Liu F, Dai W, Zhang D, Chen W, Li H. CNTs threaded (001) exposed TiO2 with high activity in photocatalytic NO oxidation. NANOSCALE 2016; 8:2899-2907. [PMID: 26780690 DOI: 10.1039/c5nr07589k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A microwave-ionothermal strategy was developed for in situ synthesis of CNTs threaded TiO2 single crystal with a tunable percentage of surface exposed (001) active facets. The CNTs were used as microwave antennas to create local "super hot" dots to induce Ti(3+) adsorption and hydrolysis, thereby leading to a good assembly of (001) facets exposed single crystalline TiO2 threaded by the CNTs in the presence of Hmim[BF4] ionic liquid. Due to the high percentage of the active (001) facets of single crystal TiO2 and the direct electron transfer property of the CNTs, the as-prepared CNTs-TiO2 composite showed a photocatalytic NO removal ratio of up to 76.8% under UV irradiation. In addition, with self-doped Ti(3+), the CNTs-TiO2 composite also exhibited an enhanced activity under irradiation with either solar lights or visible lights, showing good potential in practical applications for environmental remediation.
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Affiliation(s)
- Shuning Xiao
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China and Department of Chemistry and Department of Physics, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
| | - Wei Zhu
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Peijue Liu
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Fanfan Liu
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Wenrui Dai
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Dieqing Zhang
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Wei Chen
- Department of Chemistry and Department of Physics, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
| | - Hexing Li
- Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
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35
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Chen B, Sha J, Li W, He F, Liu E, Shi C, He C, Li J, Zhao N. Graphene Oxide-Assisted Synthesis of Microsized Ultrathin Single-Crystalline Anatase TiO2 Nanosheets and Their Application in Dye-Sensitized Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2495-2504. [PMID: 26745514 DOI: 10.1021/acsami.5b09058] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
High-quality microsized ultrathin single-crystalline anatase TiO2 nanosheets (MS-TiO2) with exposed {001} facets were synthesized by a facile and low-cost two-step process that combines a graphene oxide (GO)-assisted hydrothermal method with calcination. Both GO and HF play an important role in the formation of well dispersed MS-TiO2. As a novel microsized (1-4 μm) ultrathin two-dimensional (2D) material, MS-TiO2 possesses much higher lateral size and aspect ratio compared to common 2D nanosized (30-60 nm) ultrathin TiO2 nanosheets (NS-TiO2), resulting in excellent electronic conductivity and superior electron transfer and diffusion properties. Here, we fabricated MS-TiO2 and NS-TiO2, both of which were incorporated with the TiO2 nanoparticles (P25) to constitute the hybrid photoanode of dye-sensitized solar cells (DSSCs), and explored the effect of the lateral size (nano- and micro-) of ultrathin TiO2 nanosheets on their electron transfer and diffusion properties. Benefiting from the faster electron transfer rate and short diffusion path of the MS-TiO2, the MS-TiO2/P25 gains the more superior performance compared to pure P25 and NS-TiO2/P25 in the application of DSSCs. Moreover, it is expected that the novel high aspect ratio MS-TiO2 may be applied in diverse fields including photocatalysis, photodetectors, lithium-ion batteries and others concerning the environment and energy.
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Affiliation(s)
- Biao Chen
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Junwei Sha
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Wei Li
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Fang He
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Enzuo Liu
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
- Collaborative Innovation Centre of Chemical Science and Engineering , Tianjin 300072, People's Republic of China
| | - Chunsheng Shi
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Chunnian He
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Jiajun Li
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
| | - Naiqin Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, People's Republic of China
- Collaborative Innovation Centre of Chemical Science and Engineering , Tianjin 300072, People's Republic of China
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36
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Wang Y, Ye J, Shen Y, Xie M, Yang S, Liu C, Guo X, Peng L, Ding W, Guo X. Ultrathin anatase nanosheets with high energy facets exposed and related photocatalytic performances. RSC Adv 2016. [DOI: 10.1039/c6ra13487d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Ultrathin anatase nanosheets with high energy (116) facets exposed were fabricated from exfoliated titanate nanosheets and exhibited high photocatalytic performance.
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37
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Zhang L, Shi D, Liu B, Zhang G, Wang Q, Zhang J. A facile hydrothermal etching process to in situ synthesize highly efficient TiO2/Ag nanocube photocatalysts with high-energy facets exposed for enhanced photocatalytic performance. CrystEngComm 2016. [DOI: 10.1039/c6ce00649c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Zheng Y, Jiang Z, Yang P. Growth and photocatalytic performance of carambola-like TiO2 consisting of nanosheets exposed {001} facets. RSC Adv 2016. [DOI: 10.1039/c5ra27740j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Carambola-like TiO2 was synthesized via a one-step solvothermal method for the first time, in which enhanced photocatalytic performance was observed.
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Affiliation(s)
- Yan Zheng
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Zhixiang Jiang
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Ping Yang
- School of Material Science and Engineering
- University of Jinan
- Jinan
- P. R. China
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39
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Niu J, Shen S, Zhou L, Liu Z, Feng P, Ou X, Qiang Y. Synthesis and hydrogenation of anatase TiO2 microspheres composed of porous single crystals for significantly improved photocatalytic activity. RSC Adv 2016. [DOI: 10.1039/c6ra12053a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We developed a facile synthesis of anatase microspheres composed of porous single crystals in the absence of preseeding treatment, and examined the hydrogenation effect of porous TiO2 on the photocatalytic activity.
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Affiliation(s)
- Jinan Niu
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
- Guangdong Provincial Key Laboratory of Mineral Physics and Materials
| | - Shaishai Shen
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Lu Zhou
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Zhangsheng Liu
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Peizhong Feng
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Xuemei Ou
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Yinghuai Qiang
- School of Materials Science and Engineering
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
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40
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Song G, Luo C, Fu Q, Pan C. Hydrothermal synthesis of the novel rutile-mixed anatase TiO2 nanosheets with dominant {001} facets for high photocatalytic activity. RSC Adv 2016. [DOI: 10.1039/c6ra17665h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
We introduce a hydrothermal route to synthesize rutile-mixed anatase nanosheets with dominant {001} facets for high photocatalytic activity.
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Affiliation(s)
- Gongsheng Song
- School of Physics and Technology
- MOE Key Laboratory of Artificial Micro- and Nano-structures
- Wuhan University
- Wuhan
- China
| | - Chengzhi Luo
- School of Physics and Technology
- MOE Key Laboratory of Artificial Micro- and Nano-structures
- Wuhan University
- Wuhan
- China
| | - Qiang Fu
- School of Physics and Technology
- MOE Key Laboratory of Artificial Micro- and Nano-structures
- Wuhan University
- Wuhan
- China
| | - Chunxu Pan
- School of Physics and Technology
- MOE Key Laboratory of Artificial Micro- and Nano-structures
- Wuhan University
- Wuhan
- China
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41
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Peng JD, Lin HH, Lee CT, Tseng CM, Suryanarayanan V, Vittal R, Ho KC. Hierarchically assembled microspheres consisting of nanosheets of highly exposed (001)-facets TiO2 for dye-sensitized solar cells. RSC Adv 2016. [DOI: 10.1039/c5ra26307g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Mono-dispersed 2D nanosheets of 3D microspheres nanostructure was synthesized. It shows highly exposed (001)-facets (ca. 82%) and high surface area (112.2 m2 g−1). 11.13%-efficient DSSC is obtained with TiO2 microspheres working electrode.
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Affiliation(s)
- Jia-De Peng
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Hsi-Hsin Lin
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Chi-Ta Lee
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Chuan-Ming Tseng
- Department of Materials Engineering
- Ming Chi University of Technology
- New Taipei City
- Taiwan
| | - V. Suryanarayanan
- Electroorganic Division
- CSIR – Central Electrochemical Research Institute
- Karaikudi 630006
- India
| | - R. Vittal
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Kuo-Chuan Ho
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
- Institute of Polymer Science and Engineering
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42
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Sayed M, Fu P, Shah LA, Khan HM, Nisar J, Ismail M, Zhang P. VUV-Photocatalytic Degradation of Bezafibrate by Hydrothermally Synthesized Enhanced {001} Facets TiO2/Ti Film. J Phys Chem A 2015; 120:118-27. [DOI: 10.1021/acs.jpca.5b10502] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Murtaza Sayed
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
School of Environment, Tsinghua University, Beijing 100084, China
- National
Centre of Excellence in Physical Chemistry, University of Peshawar, 25120 Peshawar, Pakistan
- Department
of Chemistry, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Pingfeng Fu
- School
of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Luqman Ali Shah
- National
Centre of Excellence in Physical Chemistry, University of Peshawar, 25120 Peshawar, Pakistan
| | - Hasan M. Khan
- National
Centre of Excellence in Physical Chemistry, University of Peshawar, 25120 Peshawar, Pakistan
| | - Jan Nisar
- National
Centre of Excellence in Physical Chemistry, University of Peshawar, 25120 Peshawar, Pakistan
| | - M. Ismail
- National
Centre of Excellence in Physical Chemistry, University of Peshawar, 25120 Peshawar, Pakistan
| | - Pengyi Zhang
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
School of Environment, Tsinghua University, Beijing 100084, China
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44
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Yang Z, Tang X, Liu Y. Enhanced performance of dye-sensitized solar cells with fluorine doped nanocrystalline TiO2 as photoanode. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.10.131] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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45
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Abstract
The ever-increasing human demand for safe and clean water is gradually pushing conventional water treatment technologies to their limits. It is now a popular perception that the solutions to the existing and future water challenges will hinge upon further developments in nanomaterial sciences. The concept of rational design emphasizes on 'design-for-purpose' and it necessitates a scientifically clear problem definition to initiate the nanomaterial design. The field of rational design of nanomaterials for water treatment has experienced a significant growth in the past decade and is poised to make its contribution in creating advanced next-generation water treatment technologies in the years to come. Within the water treatment context, this review offers a comprehensive and in-depth overview of the latest progress in rational design, synthesis and applications of nanomaterials in adsorption, chemical oxidation and reduction reactions, membrane-based separation, oil-water separation, and synergistic multifunctional all-in-one nanomaterials/nanodevices. Special attention is paid to the chemical concepts related to nanomaterial design throughout the review.
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Affiliation(s)
- Renyuan Li
- Water Desalination and Reuse Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
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46
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Zhang Q, Yan Y, Chen G. A Biomineralization Strategy for "Net"-Like Interconnected TiO 2 Nanoparticles Conformably Covering Reduced Graphene Oxide with Reversible Interfacial Lithium Storage. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2015; 2:1500176. [PMID: 27722077 PMCID: PMC5049643 DOI: 10.1002/advs.201500176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 07/10/2015] [Indexed: 05/29/2023]
Abstract
A green and simple biomineralization-inspired method to create "net"-like interconnected TiO2 nanoparticles conformably covering reduced graphene oxide (RGO) with high loading density is reported. This method uses polyamine as both the biomineralization agent and linker to manipulate the nucleation, growth, and crystallization of TiO2 nanoparticles on the surface of graphene oxide. The obtained TiO2/RGO composites demonstrate sub-10-nm TiO2 nanoparticles with (001) facets, ultrathin thickness (10-12 nm), and a high surface area of 172 m2 g-1. When used as anode material for lithium ion batteries, the material displayed excellent rate capability and long cycle life; a capacity of 155 mAh g-1 is obtained after 50 cycles at the rate of 5C (1C = 168 mA g-1) and a specific capacity of 115 mAh g-1 is retained after 2000 cycles at the rate of 25C, which is much higher than that of mechanically mixed TiO2/graphene composites. Detailed discharge curve analysis reveals that the high rate and cycle performance are partly a result of the reversible interfacial lithium storage of materials, which might be attributed to the pores in the TiO2 nets on the RGO and may provide a sufficient number of interfaces for accepting both electrons and lithium ions.
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Affiliation(s)
- Qiang Zhang
- Key Laboratory for Green Catalysis and Separation College of Environmental & Energy Engineering Beijing University of Technology Pingle yuan 100 100124 Beijing P. R. China
| | - Yong Yan
- Key Laboratory for Green Catalysis and Separation College of Environmental & Energy Engineering Beijing University of Technology Pingle yuan 100 100124 Beijing P. R. China
| | - Ge Chen
- Key Laboratory for Green Catalysis and Separation College of Environmental & Energy Engineering Beijing University of Technology Pingle yuan 100 100124 Beijing P. R. China
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47
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Zhang YN, Tian H, Zhao G. Enhanced Visible-Light Photoelectrocatalytic Activity of {001}TiO2Electrodes Assisted with Carbon Quantum Dots. ChemElectroChem 2015. [DOI: 10.1002/celc.201500246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ya-nan Zhang
- Department of Chemistry and; Shanghai Key Laboratory of Chemical Assessment and Sustainability; Tongji University, 1239; Siping Road Shanghai 200092 China
| | - Hongyi Tian
- Department of Chemistry and; Shanghai Key Laboratory of Chemical Assessment and Sustainability; Tongji University, 1239; Siping Road Shanghai 200092 China
| | - Guohua Zhao
- Department of Chemistry and; Shanghai Key Laboratory of Chemical Assessment and Sustainability; Tongji University, 1239; Siping Road Shanghai 200092 China
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48
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Wang P, Yi Q, Xing M, Zhang J. Selective synthesis of TiO2 single nanocrystals and titanate nanotubes: a controllable atomic arrangement approach via NH4TiOF3 mesocrystals. Phys Chem Chem Phys 2015; 17:21982-7. [PMID: 26235610 DOI: 10.1039/c5cp03449c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanostructured titania and titanate have been considered as very important materials used in photocatalysis, photovoltaics, gas sensing and other electronic industries. In principle, their common structural feature is that the precursor phase involving TiO6 octahedra or similar building units may be converted to any of the nanostructured titania and titanate forms in a controllable way. Based on the atomic arrangement of ionic liquid-mediated NH4TiOF3 mesocrystals, TiO2 nanocrystals and titanate nanotubes were selectively obtained in H3BO3 and NaOH media, respectively, by using a simple hydrothermal method. Interestingly, the titanate nanotubes were successfully formed by extraction of NH4(+) and F from NH4TiOF3 in a milder alkaline environment as low as 1 M NaOH, rather than conventional treatment of TiO2 in 10 M NaOH. The as-prepared TiO2 nanocrystals with exposed {001} facets exhibit a high photocatalytic activity and sedimentation rate as compared to commercial TiO2. Upon further doping or ion-exchange, the newly prepared TiO2 nanocrystals will show potential applications in the environment.
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Affiliation(s)
- Penghua Wang
- Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China.
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49
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Patra S, Davoisne C, Bouyanfif H, Foix D, Sauvage F. Phase stability frustration on ultra-nanosized anatase TiO2. Sci Rep 2015; 5:10928. [PMID: 26042388 PMCID: PMC4455250 DOI: 10.1038/srep10928] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 05/07/2015] [Indexed: 11/09/2022] Open
Abstract
This work sheds light on the exceptional robustness of anatase TiO2 when it is downsized to an extreme value of 4 nm. Since at this size the surface contribution to the volume becomes predominant, it turns out that the material becomes significantly resistant against particles coarsening with temperature, entailing a significant delay in the anatase to rutile phase transition, prolonging up to 1000 °C in air. A noticeable alteration of the phase stability diagram with lithium insertion is also experienced. Lithium insertion in such nanocrystalline anatase TiO2 converts into a complete solid solution until almost Li1TiO2, a composition at which the tetragonal to orthorhombic transition takes place without the formation of the emblematic and unwished rock salt Li1TiO2 phase. Consequently, excellent reversibility in the electrochemical process is experienced in the whole portion of lithium content.
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Affiliation(s)
- Snehangshu Patra
- Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
- Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France
| | - Carine Davoisne
- Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
- Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France
| | - Houssny Bouyanfif
- Laboratoire de Physique de la Matière Condensée, Université de Picardie Jules Verne, 33 rue Saint Leu, 80039 Amiens, France
| | - Dominique Foix
- Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France
- IPREM/ECP (CNRS UMR5254), University of Pau, Helioparc, 2 Av. Pierre Angot, 64053 Pau Cedex 9, France
| | - Frédéric Sauvage
- Laboratoire de Réactivité et Chimie des Solides, Université de Picardie Jules Verne, CNRS UMR 7314, 33 rue Saint Leu, 80039 Amiens, France
- Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France
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50
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Hong JY, Bae SE, Won YS, Huh S. Simple preparation of lotus-root shaped meso-/macroporous TiO2 and their DSSC performances. J Colloid Interface Sci 2015; 448:467-72. [DOI: 10.1016/j.jcis.2015.02.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 02/17/2015] [Accepted: 02/22/2015] [Indexed: 10/23/2022]
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