1
|
Enhanced photocatalytic activity of reduced graphene oxide-TiO2nanocomposite for picric acid degradation. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109660] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
2
|
Wong SS, Hülsey MJ, An H, Yan N. Quantum yield enhancement in the photocatalytic HCOOH decomposition to H 2 under periodic illumination. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00935h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite numerous studies on controlled periodic illumination to improve the quantum yield of photocatalytic reactions, debates still exist on the nature of such effect. In our system, we proposed that enhanced electron transfer is the promotion mechanism.
Collapse
Affiliation(s)
- Sie Shing Wong
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, P. R. China
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585 Singapore
| | - Max Joshua Hülsey
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585 Singapore
| | - Hua An
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, P. R. China
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585 Singapore
| | - Ning Yan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585 Singapore
| |
Collapse
|
3
|
Dalmis R, Yılmaz O, Dikici T. A new concept for the eco-friendly structural colorization of anodic titania: Photonic crystal structure. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Japa M, Tantraviwat D, Phasayavan W, Nattestad A, Chen J, Inceesungvorn B. Simple preparation of nitrogen-doped TiO2 and its performance in selective oxidation of benzyl alcohol and benzylamine under visible light. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125743] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
5
|
Kim MG, Lee JE, Kim KS, Kang JM, Lee JH, Kim KH, Cho M, Lee SG. Photocatalytic degradation of methylene blue under UV and visible light by brookite–rutile bi-crystalline phase of TiO 2. NEW J CHEM 2021. [DOI: 10.1039/d0nj05162d] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brookite–rutile bi-crystalline phase of TiO2 were synthesized and applied for the degradation of methylene blue under UV and visible light irradiation by photocatalytic reaction.
Collapse
Affiliation(s)
- Min Gu Kim
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Ji Eun Lee
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Kang Seok Kim
- Department of Organic Material Science and Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Jeong Min Kang
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Jeong Hoon Lee
- Korea Institute of Convergence Textile
- Jeollabuk-do
- Republic of Korea
| | - Kwang Ho Kim
- School of Materials Science and Engineering
- Pusan National University
- Busan
- Republic of Korea
| | - Min Cho
- Division of Biotechnology
- Advanced institute of Environment and Bioscience
- College of Environmental and Bioresource Sciences
- Chonbuk National University
- Iksan 54596
| | - Seung Geol Lee
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
- Department of Organic Material Science and Engineering
| |
Collapse
|
6
|
Al Kausor M, Chakrabortty D. Facile fabrication of N-TiO2/Ag3PO4@GO nanocomposite toward photodegradation of organic dye under visible light. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107907] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
7
|
Wei S, Xu X. Nitrogen-doped LaZrTa 3O 11 as a visible light-active photocatalyst for water-reduction and -oxidation reactions. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00548g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrogen doping red-shifted the absorption edge of LaZrTa3O11 markedly and induced visible-light activity for photocatalytic water-reduction and -oxidation reactions.
Collapse
Affiliation(s)
- Shunhang Wei
- Clinical and Central Lab
- Putuo People's Hospital
- Tongji University
- Shanghai
- China
| | - Xiaoxiang Xu
- Clinical and Central Lab
- Putuo People's Hospital
- Tongji University
- Shanghai
- China
| |
Collapse
|
8
|
Zhang H, Sun X, Wang Y, Xu X. Switching on wide visible light photocatalytic activity over Mg4Ta2O9 by nitrogen doping for water oxidation and reduction. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
9
|
Wang R, Lin G, Xu X. Visible light photocatalytic water oxidation over complex perovskites Sr3BNb2O9 (B = Mg, Ca and Sr) doped with nitrogen. Inorg Chem Front 2019. [DOI: 10.1039/c9qi01151j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Large Sr cations at B site favor higher nitrogen uptake and surface hydrophilicity, being responsible for the high photocatalytic activity for water oxidation reactions.
Collapse
Affiliation(s)
- Ran Wang
- Shanghai Key Lab of Chemical Assessment and Sustainability
- School of Chemical Science and Engineering
- Tongji University
- Shanghai
- China
| | - Guoan Lin
- Shanghai Key Lab of Chemical Assessment and Sustainability
- School of Chemical Science and Engineering
- Tongji University
- Shanghai
- China
| | - Xiaoxiang Xu
- Shanghai Key Lab of Chemical Assessment and Sustainability
- School of Chemical Science and Engineering
- Tongji University
- Shanghai
- China
| |
Collapse
|
10
|
Jayabharathi J, Panimozhi S, Thanikachalam V, Prabhakaran A, Jeeva P. A hybrid inorganic–organic light-emitting diode using Ti-doped ZrO2 as an electron-injection layer. RSC Adv 2018; 8:8402-8411. [PMID: 35542037 PMCID: PMC9078518 DOI: 10.1039/c8ra00259b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 02/17/2018] [Indexed: 11/21/2022] Open
Abstract
We have fabricated stable efficient iridium(iii)-bis-5-(1-(naphthalene-1-yl)-1H-phenanthro[9,10-d]imidazole-2-yl) benzene-1,2,3-triol (acetylacetonate) [Ir(NPIBT)2 (acac)] doped inverted bottom-emissive green organic light-emitting diodes using Ti-doped ZrO2 nanomaterials as the electron injection layer. The current density (J) and luminance (L) of the fabricated devices with Ti-doped ZrO2 deposited between an indium tin oxide cathode and an Ir(NPIBT)2 (acac) emissive layer increased significantly at a low driving voltage (V) compared with control devices without Ti-doped ZrO2. The Ti-doped ZrO2 layer can facilitate the electron injection effectively and enhances the current efficiency (ηc) of 2.84 cd A−1 and power efficiency (ηp) of 1.32 lm W−1 Ti-doped ZrO2 facilitates electron injection effectively, leading to enhanced current efficiency of 2.84 cd A−1 and power efficiency of 1.32 lm W−1![]()
Collapse
Affiliation(s)
| | - Sekar Panimozhi
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
| | | | | | - Palanivel Jeeva
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
| |
Collapse
|
11
|
Photocatalytic Behavior of Water-Based Styrene-Acrylic Coatings Containing TiO2 Sensitized with Metal-Phthalocyanine Tetracarboxylic Acids. COATINGS 2017. [DOI: 10.3390/coatings7120229] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Elsalamony RA, Mahmoud SA. Preparation of nanostructured ruthenium doped titania for the photocatalytic degradation of 2-chlorophenol under visible light. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.06.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
13
|
Light-Storing Photocatalyst: The Possibility of Activating Titanium Dioxide by Photoluminescence. J Appl Biomater Funct Mater 2016; 14:e477-e482. [DOI: 10.5301/jabfm.5000284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/05/2016] [Indexed: 11/20/2022] Open
Abstract
Introduction The aim of the present work was to analyze the possibility of creating a light-storing photocatalyst material, a system that couples a phosphorescent substrate with a titania coating. The substrate could activate the titanium dioxide coating even in condition of darkness thanks to its light emission. This improvement of absorption can be achieved because the titania semiconductor is irradiated both by the direct light and by the luminescent substrate which is activated at the same time. Methods TiO2-based sol-gel solutions were deposited on commercial borosilicate glasses containing 2 different phosphorescent pigments (emission peaks at 470 and 520 nm, respectively). Particular attention was paid to optimize the film-substrate adhesion by using a scratch test to evaluate the optimal temperature of the post- treatment step. Results and discussion The main result is that when irradiated the photoluminescent pigments allow an increase in the photocatalytic acitivity of the coatings. The pigments are able to convert the ultraviolet component of light in order to increase the amount of energy that can be absorbed by titania. Moreover, the hydrophilicity test showed that in the absence of irradiation the phosphorescent samples are characterized by a lower loss of superhydrophilicity.
Collapse
|
14
|
Moradlou O, Tedadi N, Banazadeh A, Naseri N. Effect of RGO/ZnxCd1−xS crystalline phase on solar photoactivation processes. RSC Adv 2016. [DOI: 10.1039/c6ra04415h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Crystal phase transition from cubic phase in RGO/Zn0.9Cd0.1S to hexagonal wurtzite phase in RGO/Zn0.8Cd0.2S occurs and the crystalline phase is the main factor influencing the photoresponsivity of RGO/ZnxCd1−xS under visible light irradiation.
Collapse
Affiliation(s)
| | - Neda Tedadi
- Department of Chemistry
- Alzahra University
- Tehran
- Iran
| | - Alireza Banazadeh
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| | - Naimeh Naseri
- Department of Physics
- Sharif University of Technology
- Tehran
- Iran
| |
Collapse
|
15
|
Kumar SG, Rao KSRK. Polymorphic phase transition among the titania crystal structures using a solution-based approach: from precursor chemistry to nucleation process. NANOSCALE 2014; 6:11574-632. [PMID: 24969423 DOI: 10.1039/c4nr01657b] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Nanocrystalline titania are a robust candidate for various functional applications owing to its non-toxicity, cheap availability, ease of preparation and exceptional photochemical as well as thermal stability. The uniqueness in each lattice structure of titania leads to multifaceted physico-chemical and opto-electronic properties, which yield different functionalities and thus influence their performances in various green energy applications. The high temperature treatment for crystallizing titania triggers inevitable particle growth and the destruction of delicate nanostructural features. Thus, the preparation of crystalline titania with tunable phase/particle size/morphology at low to moderate temperatures using a solution-based approach has paved the way for further exciting areas of research. In this focused review, titania synthesis from hydrothermal/solvothermal method, conventional sol-gel method and sol-gel-assisted method via ultrasonication, photoillumination and ILs, thermolysis and microemulsion routes are discussed. These wet chemical methods have broader visibility, since multiple reaction parameters, such as precursor chemistry, surfactants, chelating agents, solvents, mineralizer, pH of the solution, aging time, reaction temperature/time, inorganic electrolytes, can be easily manipulated to tune the final physical structure. This review sheds light on the stabilization/phase transformation pathways of titania polymorphs like anatase, rutile, brookite and TiO2(B) under a variety of reaction conditions. The driving force for crystallization arising from complex species in solution coupled with pH of the solution and ion species facilitating the orientation of octahedral resulting in a crystalline phase are reviewed in detail. In addition to titanium halide/alkoxide, the nucleation of titania from other precursors like peroxo and layered titanates are also discussed. The non-aqueous route and ball milling-induced titania transformation is briefly outlined; moreover, the lacunae in understanding the concepts and future prospects in this exciting field are suggested.
Collapse
Affiliation(s)
- S Girish Kumar
- Department of Physics, Indian Institute of Science, Bangalore-560012, Karnataka, India.
| | | |
Collapse
|
16
|
Zhong W, Yu Y, Du C, Li W, Wang Y, He G, Xie Y, He Q. Characterization and high pollutant removal ability of buoyant (C, N)–TiO2/PTFE flakes prepared by high-energy ball-milling. RSC Adv 2014. [DOI: 10.1039/c4ra06496h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
17
|
Janitabar-Darzi S. Structural and Photocatalytic Activity of Mesoporous N-Doped TiO2with Band-to-Band Visible Light Absorption Ability. PARTICULATE SCIENCE AND TECHNOLOGY 2014. [DOI: 10.1080/02726351.2014.920443] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
18
|
Nawawi W, Nawi M. Carbon coated nitrogen doped P25 for the photocatalytic removal of organic pollutants under solar and low energy visible light irradiations. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2013.11.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
19
|
Double-Layer TiO2 Electrodes with Controlled Phase Composition and Morphology for Efficient Light Management in Dye-Sensitized Solar Cells. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0687-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
20
|
Mesoporous interstitial and substitutional nitrogen-containing titanium dioxide photocatalysts prepared by acid-assisted sol–gel procedure. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2014. [DOI: 10.1007/s13738-014-0405-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
21
|
Žunič V, Vukomanović M, Škapin SD, Suvorov D, Kovač J. Photocatalytic properties of TiO2 and TiO2/Pt: a sol-precipitation, sonochemical and hydrothermal approach. ULTRASONICS SONOCHEMISTRY 2014; 21:367-375. [PMID: 23831420 DOI: 10.1016/j.ultsonch.2013.05.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 05/21/2013] [Accepted: 05/26/2013] [Indexed: 06/02/2023]
Abstract
In this work we prepared TiO2 nano-powders and TiO2/Pt nano-composites via three synthesis methods (sol-precipitation, sonochemical method, hydrothermal method) starting with the same precursors and media. To evaluate and compare the physical properties of the prepared materials, X-ray diffraction analysis, BET measurements, FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS) and electron microscopy (TEM, HRTEM, SAED) were applied. The results showed changes to the TiO2 phase composition and crystallinity, the specific surface area as well as the platinum's particle shape and size, depending on the method of synthesis. To determine the photocatalytic efficiency of the prepared materials, the photocatalytic discoloration of the methylene blue solution was evaluated using UV-Vis spectroscopy. The important properties required for a high photocatalytic activity, related to the surface characteristics and the phase composition, were determined in terms of the synthesis method. It was concluded that the optimum characteristics were obtained when using the hydrothermal approach, where the TiO2 had two phases, i.e., - anatase and rutile, a Pt-phase in the form of nanoparticles and adsorbed Pt-molecular species, as well as the presence of available free surface hydroxyl groups. Such characteristics had a critical influence on the photocatalytic activity of the final material.
Collapse
Affiliation(s)
- Vojka Žunič
- Jožef Stefan Institute, Advanced Materials Department, Jamova cesta 39, 1000 Ljubljana, Slovenia.
| | | | | | | | | |
Collapse
|
22
|
Subbaiyan S, Rangarajalu S, Sriram L. Change of phase by annealing on TiO2 nanoparticles. RUSS J APPL CHEM+ 2013. [DOI: 10.1134/s1070427213060049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
23
|
Engineering the nanoarchitecture and texture of polymeric carbon nitride semiconductor for enhanced visible light photocatalytic activity. J Colloid Interface Sci 2013; 401:70-9. [DOI: 10.1016/j.jcis.2013.03.034] [Citation(s) in RCA: 276] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 03/18/2013] [Accepted: 03/21/2013] [Indexed: 11/23/2022]
|
24
|
Ravi G, Veldurthi NK, Palla S, Velchuri R, Pola S, Reddy JR, Vithal M. Synthesis, Characterization and Photocatalytic Activity of KAl0.33W1.67O6and Sn0.5Al0.33W1.67O6xH2O. Photochem Photobiol 2013; 89:824-31. [PMID: 23565887 DOI: 10.1111/php.12079] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Accepted: 03/30/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Gundeboina Ravi
- Department of Chemistry; Osmania University; Hyderabad; India
| | | | - Suresh Palla
- Department of Chemistry; Osmania University; Hyderabad; India
| | - Radha Velchuri
- Department of Chemistry; Osmania University; Hyderabad; India
| | - Someshwar Pola
- Department of Chemistry; Osmania University; Hyderabad; India
| | | | - Muga Vithal
- Department of Chemistry; Osmania University; Hyderabad; India
| |
Collapse
|
25
|
Chakrabortty D, Gupta SS. Photo-catalytic decolourisation of toxic dye with N-doped titania: a case study with Acid Blue 25. J Environ Sci (China) 2013; 25:1034-1043. [PMID: 24218835 DOI: 10.1016/s1001-0742(12)60108-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Dyes are one of the hazardous water pollutants. Toxic Acid Blue 25, an anthraquinonic dye, has been decolourised by photo-catalysing it with nitrogen doped titania in aqueous medium. The photo catalyst was prepared from 15% TiCl3 and 25% aqueous NH3 solution as precursor. XRD and TEM revealed the formation of well crystalline anatase phase having particle size in the nano-range. BET surface area of the sample was higher than that of pure anatase TiO2. DRS showed higher absorption of radiation in visible range compared to pure anatase TiO2. XPS revealed the presence of nitrogen in N-Ti-O environment. The experimental parameters, namely, photocatalyst dose, initial dye concentration as well as solution pH influence the decolourisation process. At pH 3.0, the N-TiO2 could decolourise almost 100% Acid Blue 25 within one hour. The influence of N-TiO2 dose, initial concentration of Acid Blue 25 and solution pH on adsorption-desorption equilibrium is also studied. The adsorption process follows Lagergren first order kinetics while the modified Langmuir-Hinselwood model is suitably fitted for photocatalytic decolourisation of Acid Blue 25.
Collapse
|
26
|
Baláž P, Achimovičová M, Baláž M, Billik P, Cherkezova-Zheleva Z, Criado JM, Delogu F, Dutková E, Gaffet E, Gotor FJ, Kumar R, Mitov I, Rojac T, Senna M, Streletskii A, Wieczorek-Ciurowa K. Hallmarks of mechanochemistry: from nanoparticles to technology. Chem Soc Rev 2013; 42:7571-637. [PMID: 23558752 DOI: 10.1039/c3cs35468g] [Citation(s) in RCA: 482] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).
Collapse
Affiliation(s)
- Peter Baláž
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04353, Košice, Slovakia.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Application of Titanium Dioxide-Graphene Composite Material for Photocatalytic Degradation of Alkylphenols. J CHEM-NY 2013. [DOI: 10.1155/2013/456586] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Titanium dioxide-graphene (TiO2-G) composite was used for the photodegradation of alkylphenols in wastewater samples. The TiO2-G composites were prepared via sonochemical and calcination methods. The synthesized composite was characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), and fluorescence spectroscopy. The photocatalytic efficiency was evaluated by studying the degradation profiles of alkylphenols using gas chromatography-flame ionization detector (GC-FID). It was found that the synthesized TiO2-G composites exhibit enhanced photocatalytic efficiencies as compared to pristine TiO2. The presence of graphene not only provides a large surface area support for the TiO2photocatalyst, but also stabilizes charge separation by trapping electrons transferred from TiO2, thereby hindering charge transfer and enhancing its photocatalytic efficiency.
Collapse
|
28
|
|
29
|
Selvaraj A, Sivakumar S, Ramasamy AK, Balasubramanian V. Photocatalytic degradation of triazine dyes over N-doped TiO2 in solar radiation. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0756-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
30
|
Kiran V, Sampath S. Enhanced Raman spectroscopy of molecules adsorbed on carbon-doped TiO₂ obtained from titanium carbide: a visible-light-assisted renewable substrate. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3818-3828. [PMID: 22738214 DOI: 10.1021/am300349k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Titanium carbide (TiC) is an electrically conducting material with favorable electrochemical properties. In the present studies, carbon-doped TiO(2) (C-TiO(2)) has been synthesized from TiC particles, as well as TiC films coated on stainless steel substrate via thermal annealing under various conditions. Several C-TiO(2) substrates are synthesized by varying experimental conditions and characterized by UV-visible spectroscopy, photoluminescence, X-ray diffraction, and X-ray photoelectron spectroscopic techniques. C-TiO(2) in the dry state (in powder form as well as in film form) is subsequently used as a substrate for enhancing Raman signals corresponding to 4-mercaptobenzoic acid and 4-nitrothiophenol by utilizing chemical enhancement based on charge-transfer interactions. Carbon, a nonmetal dopant in TiO(2), improves the intensities of Raman signals, compared to undoped TiO(2). Significant dependence of Raman intensity on carbon doping is observed. Ameliorated performance obtained using C-TiO(2) is attributed to the presence of surface defects that originate due to carbon as a dopant, which, in turn, triggers charge transfer between TiO(2) and analyte. The C-TiO(2) substrates are subsequently regenerated for repetitive use by illuminating an analyte-adsorbed substrate with visible light for a period of 5 h.
Collapse
Affiliation(s)
- Vankayala Kiran
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | | |
Collapse
|
31
|
Senna M, Šepelák V, Shi J, Bauer B, Feldhoff A, Laporte V, Becker KD. Introduction of oxygen vacancies and fluorine into TiO2 nanoparticles by co-milling with PTFE. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2011.12.036] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
32
|
Peng XL, Yao MM, Li F, Sun XH. Microstructures and Photocatalytic Properties of S Doped Nanocrystalline TiO2Films. PARTICULATE SCIENCE AND TECHNOLOGY 2012. [DOI: 10.1080/02726351.2010.551711] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
33
|
Kumar SG, Devi LG. Review on Modified TiO2 Photocatalysis under UV/Visible Light: Selected Results and Related Mechanisms on Interfacial Charge Carrier Transfer Dynamics. J Phys Chem A 2011; 115:13211-41. [DOI: 10.1021/jp204364a] [Citation(s) in RCA: 1519] [Impact Index Per Article: 116.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- S. Girish Kumar
- Department of Post Graduate Studies in Chemistry, Bangalore University, Central College City Campus, Dr. Ambedkar Street, Bangalore-560001, Karnataka, India
| | - L. Gomathi Devi
- Department of Post Graduate Studies in Chemistry, Bangalore University, Central College City Campus, Dr. Ambedkar Street, Bangalore-560001, Karnataka, India
| |
Collapse
|
34
|
Sun J, Forster AM, Johnson PM, Eidelman N, Quinn G, Schumacher G, Zhang X, Wu WL. Improving performance of dental resins by adding titanium dioxide nanoparticles. Dent Mater 2011; 27:972-82. [DOI: 10.1016/j.dental.2011.06.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 05/24/2011] [Accepted: 06/21/2011] [Indexed: 11/26/2022]
|
35
|
Enhancement of the photocatalytic activity of TiO2 by doping it with calcium ions. J Colloid Interface Sci 2011; 357:168-78. [DOI: 10.1016/j.jcis.2011.01.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 12/24/2010] [Accepted: 01/05/2011] [Indexed: 11/23/2022]
|
36
|
Pan GT, Huang CM, Peng PY, Yang TCK. Nano-scaled silver vanadates loaded on mesoporous silica: Characterization and photocatalytic activity. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.12.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
37
|
Naik B, Parida KM. Solar Light Active Photodegradation of Phenol over a FexTi1−xO2−yNy Nanophotocatalyst. Ind Eng Chem Res 2010. [DOI: 10.1021/ie100889m] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brundabana Naik
- Colloids and Materials Chemistry Department, Institute of Minerals and Materials Technology (CSIR), Bhubaneswar 751 013, Orissa, India
| | - K. M. Parida
- Colloids and Materials Chemistry Department, Institute of Minerals and Materials Technology (CSIR), Bhubaneswar 751 013, Orissa, India
| |
Collapse
|
38
|
Synthesis of nanometer-size Bi3TaO7 and its visible-light photocatalytic activity for the degradation of a 4BS dye. J Colloid Interface Sci 2010; 345:467-73. [DOI: 10.1016/j.jcis.2010.01.084] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2009] [Revised: 01/23/2010] [Accepted: 01/27/2010] [Indexed: 11/19/2022]
|
39
|
Dong F, Wang H, Wu Z, Qiu J. Marked enhancement of photocatalytic activity and photochemical stability of N–doped TiO2 nanocrystals by Fe3+/Fe2+ surface modification. J Colloid Interface Sci 2010; 343:200-8. [DOI: 10.1016/j.jcis.2009.11.012] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2009] [Revised: 09/28/2009] [Accepted: 11/03/2009] [Indexed: 11/25/2022]
|
40
|
Seok SI, Vithal M, Chang JA. Colloidal TiO2 nanocrystals prepared from peroxotitanium complex solutions: phase evolution from different precursors. J Colloid Interface Sci 2010; 346:66-71. [PMID: 20227087 DOI: 10.1016/j.jcis.2010.02.049] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2009] [Revised: 02/06/2010] [Accepted: 02/21/2010] [Indexed: 10/19/2022]
Abstract
We report the preparation of nanocrystalline anatase and rutile TiO(2) from aqueous peroxotitanium complex (PTC) solutions and their characterization by powder X-ray diffraction (XRD), infrared spectroscopy, and Raman spectroscopy. The phase evolution of TiO(2) prepared using PTC derived from different precursors, i.e., TiCl(4) and titanium tetraisopropoxide (TTIP), is related to the nature of the intermediate steps. Phase-pure nanoanatase was formed in PTC solution derived from TiCl(4), while a mixture of minor anatase and dominant rutile were prepared from PTC when TTIP was used as precursor. On the other hand, in the case of calcining PTC powders in air, a pure anatase phase of TiO(2) was obtained, regardless of the precursor used. Thus, the formation and attachment of hydrated TiO(6) units or TiO(2)·xH(2)O under a different environment, especially pH, plays a critical role in determining the phase during the crystallization of TiO(2).
Collapse
Affiliation(s)
- Sang Il Seok
- KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology, 19 Sinseongno, Yuseong, Daejeon 305-600, Republic of Korea.
| | | | | |
Collapse
|
41
|
Liu G, Wang L, Yang HG, Cheng HM, (Max) Lu GQ. Titania-based photocatalysts—crystal growth, doping and heterostructuring. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b909930a] [Citation(s) in RCA: 964] [Impact Index Per Article: 68.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
42
|
Braham RJ, Harris AT. Review of Major Design and Scale-up Considerations for Solar Photocatalytic Reactors. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900859z] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rowan J. Braham
- Laboratory of Sustainable Technology, School of Chemical and Biomolecular Engineering, Chemical Engineering Building J01, University of Sydney, NSW, 2006, Australia
| | - Andrew T. Harris
- Laboratory of Sustainable Technology, School of Chemical and Biomolecular Engineering, Chemical Engineering Building J01, University of Sydney, NSW, 2006, Australia
| |
Collapse
|
43
|
Liu G, Wang X, Wang L, Chen Z, Li F, (Max) Lu GQ, Cheng HM. Drastically enhanced photocatalytic activity in nitrogen doped mesoporous TiO2 with abundant surface states. J Colloid Interface Sci 2009; 334:171-5. [DOI: 10.1016/j.jcis.2009.02.047] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Revised: 02/17/2009] [Accepted: 02/18/2009] [Indexed: 11/26/2022]
|
44
|
Im JS, Yun SM, Lee YS. Investigation of multielemental catalysts based on decreasing the band gap of titania for enhanced visible light photocatalysis. J Colloid Interface Sci 2009; 336:183-8. [PMID: 19447408 DOI: 10.1016/j.jcis.2009.03.078] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 03/23/2009] [Accepted: 03/31/2009] [Indexed: 10/20/2022]
Abstract
Novel photocatalysts based on carbon-, nitrogen-, boron-, and fluorine-codoped TiO(2) have been successfully prepared from a single precursor in order to obtain titania with a decreased band gap. Three kinds of catalytic mechanisms are suggested. Initially, boron acts as an initiator to lead the movement of electrons in the valence band, and then nitrogen and fluorine provide electrons in the valence band. Eventually, electrons in the valence band can travel to the conduction band through a carbon bridge. The effect of the calcination temperature was also evaluated for the photodegradation of dyes. Excellent photoactivity results were obtained in the case of samples treated at 400 degrees C and the phase transformation from anatase to rutile did not occur up to calcination temperatures of 800 degrees C. The photodegradation followed the pseudo-first-order kinetic expression. The exceptional visible photoactivities of the prepared catalysts can be predominantly attributed to the effects of doping on titania, reducing its band gap.
Collapse
Affiliation(s)
- Ji Sun Im
- Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University, Gung-dong 220, Yuseong-gu, Daejeon 305 764, Republic of Korea
| | | | | |
Collapse
|
45
|
Liu G, Sun C, Yan X, Cheng L, Chen Z, Wang X, Wang L, Smith SC, Lu GQ(M, Cheng HM. Iodine doped anatase TiO2 photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b820816f] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Liu G, Yan X, Chen Z, Wang X, Wang L, Lu GQ, Cheng HM. Synthesis of rutile–anatase core–shell structured TiO2 for photocatalysis. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b902666e] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
47
|
Liu G, Yang HG, Sun C, Cheng L, Wang L, Lu GQ(M, Cheng HM. Titania polymorphs derived from crystalline titanium diboride. CrystEngComm 2009. [DOI: 10.1039/b909191m] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|