1
|
Bushkov NS, Rumyantsev AV, Zhizhin AA, Strelkova TV, Novikov RA, Gutsul EI, Takazova RU, Kitaeva DK, Ustynyuk NA, Zhizhko PA, Zarubin DN. Tungsten Oxide Dispersed on Silica as Robust and Readily Available Oxo/Imido Heterometathesis Catalyst. Chempluschem 2024:e202400029. [PMID: 38589286 DOI: 10.1002/cplu.202400029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 04/04/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Continuing our investigation of catalytic oxo/imido heterometathesis as novel water-free method for C=N bond construction, we report here the application of classical transition metal oxides dispersed on silica (MOx/SiO2, M=V, Mo, W) as cheap, robust and readily available alternative to the catalysts prepared via Surface Organometallic Chemistry (SOMC). The oxide materials demonstrated activity in heterometathetical imidation of ketones, WO3/SiO2 being the most efficient. We also describe a new well-defined supported W imido complex (≡SiO)W(=NMes)2(Me2Pyr) (Mes=2,4,6-Me3C6H2, Me2Pyr=2,5-dimethylpyrrolyl) and characterize it with SOMC protocols, which allowed us to identify the position of W on the oxo/imido heterometathesis activity scale (Mo
Collapse
Affiliation(s)
- Nikolai S Bushkov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Andrey V Rumyantsev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
- Chemistry Department, Moscow State University, Vorob'evy Gory, 1, 119992, Moscow, Russia
| | - Anton A Zhizhin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Tatyana V Strelkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Roman A Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prosp., 47, 119991, Moscow, Russia
| | - Evgenii I Gutsul
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Rina U Takazova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Dinara K Kitaeva
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Nikolai A Ustynyuk
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Pavel A Zhizhko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| | - Dmitry N Zarubin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119334, Moscow, Russia
| |
Collapse
|
2
|
Castro-Campoy D, Vargas-Hernández D, Sánchez-Cruz M, Hernández-Huesca R. Photodegradation of acetaminophen and ibuprofen in iron supported in SBA-15 under UV irradiation. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|
3
|
Zabilska A, Clark AH, Ferri D, Nachtegaal M, Kröcher O, Safonova OV. Beware of beam damage under reaction conditions: X-ray induced photochemical reduction of supported VO x catalysts during in situ XAS experiments. Phys Chem Chem Phys 2022; 24:21916-21926. [PMID: 36069029 PMCID: PMC9641748 DOI: 10.1039/d2cp02721f] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/20/2022] [Indexed: 11/04/2023]
Abstract
In situ X-ray absorption spectroscopy (XAS) is a powerful technique for the investigation of heterogeneous catalysts and electrocatalysts. The obtained XAS spectra are usually interpreted from the point of view of the investigated chemical processes, thereby sometimes omitting the fact that intense X-ray irradiation may induce additional transformations in metal speciation and, thus, in the corresponding XAS spectra. In this work, we report on X-ray induced photochemical reduction of vanadium in supported vanadia (VOx) catalysts under reaction conditions, detected at a synchrotron beamline. While this process was not observed in an inert atmosphere and in the presence of water vapor, it occurred at room temperature in the presence of a reducing agent (ethanol or hydrogen) alone or mixed with oxygen. Temperature programmed experiments have shown that X-ray induced reduction of VOx species appeared very clear at 30-100 °C but was not detected at higher temperatures, where the thermocatalytic ethanol oxidative hydrogenation (ODH) takes place. Similar to other studies on X-ray induced effects, we suggest approaches, which can help to mitigate vanadium photoreduction, including defocusing of the X-ray beam and attenuation of the X-ray beam intensity by filters. To recognize beam damage under in situ/operando conditions, we suggest performing X-ray beam switching (on and off) tests at different beam intensities under in situ conditions.
Collapse
Affiliation(s)
- Anna Zabilska
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
- École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Adam H Clark
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
| | - Davide Ferri
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
| | | | - Oliver Kröcher
- Paul Scherrer Institute, 5232 Villigen, Switzerland.
- École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | | |
Collapse
|
4
|
Nabgan W, Nabgan B, Tuan Abdullah TA, Ikram M, Jadhav AH, Ali MW, Jalil AA. Hydrogen and value-added liquid fuel generation from pyrolysis-catalytic steam reforming conditions of microplastics waste dissolved in phenol over bifunctional Ni-Pt supported on Ti-Al nanocatalysts. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.11.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
5
|
Zeynep Ayla E, Patel D, Harris A, Flaherty DW. Identity of the Metal Oxide Support Controls Outer Sphere Interactions that Change Rates and Barriers for Alkene Epoxidations at Isolated Ti Atoms. J Catal 2022. [DOI: 10.1016/j.jcat.2022.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
6
|
Zabilska A, Clark AH, Moskowitz BM, Wachs IE, Kakiuchi Y, Copéret C, Nachtegaal M, Kröcher O, Safonova OV. Redox Dynamics of Active VO x Sites Promoted by TiO x during Oxidative Dehydrogenation of Ethanol Detected by Operando Quick XAS. JACS AU 2022; 2:762-776. [PMID: 35388376 PMCID: PMC8977985 DOI: 10.1021/jacsau.2c00027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/25/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Titania-supported vanadia (VO x /TiO2) catalysts exhibit outstanding catalytic in a number of selective oxidation and reduction processes. In spite of numerous investigations, the nature of redox transformations of vanadium and titanium involved in various catalytic processes remains difficult to detect and correlate to the rate of products formation. In this work, we studied the redox dynamics of active sites in a bilayered 5% V2O5/15% TiO2/SiO2 catalyst (consisting of submonolayer VO x species anchored onto a TiO x monolayer, which in turn is supported on SiO2) during the oxidative dehydrogenation of ethanol. The VO x species in 5% V2O5/15% TiO2/SiO2 show high selectivity to acetaldehyde and an ca. 40 times higher acetaldehyde formation rate in comparison to VO x species supported on SiO2 with a similar density. Operando time-resolved V and Ti K-edge X-ray absorption near-edge spectroscopy, coupled with a transient experimental strategy, quantitatively showed that the formation of acetaldehyde over 5% V2O5/15% TiO2/SiO2 is kinetically coupled to the formation of a V4+ intermediate, while the formation of V3+ is delayed and 10-70 times slower. The low-coordinated nature of various redox states of VO x species (V5+, V4+, and V3+) in the 5% V2O5/15% TiO2/SiO2 catalyst is confirmed using the extensive database of V K-edge XANES spectra of standards and specially synthesized molecular crystals. Much weaker redox activity of the Ti4+/Ti3+ couple was also detected; however, it was found to not be kinetically coupled to the rate-determining step of ethanol oxidation. Thus, the promoter effect of TiO x is rather complex. TiO x species might be involved in a fast electron transport between VO x species and might affect the electronic structure of VO x , thereby promoting their reducibility. This study demonstrates the high potential of element-specific operando X-ray absorption spectroscopy for uncovering complex catalytic mechanisms involving the redox kinetics of various metal oxides.
Collapse
Affiliation(s)
- Anna Zabilska
- Paul
Scherrer Institute, 5232 Villigen, Switzerland
- École
Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | | | - Benjamin M. Moskowitz
- Operando Molecular Spectroscopy &
Catalysis Laboratory,
Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Israel E. Wachs
- Operando Molecular Spectroscopy &
Catalysis Laboratory,
Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Yuya Kakiuchi
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, CH-8093 Zürich, Switzerland
| | - Christophe Copéret
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, CH-8093 Zürich, Switzerland
| | | | - Oliver Kröcher
- Paul
Scherrer Institute, 5232 Villigen, Switzerland
- École
Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | | |
Collapse
|
7
|
Smeets V, Gaigneaux EM, Debecker DP. Titanosilicate Epoxidation Catalysts: A Review of Challenges and Opportunities. ChemCatChem 2022. [DOI: 10.1002/cctc.202101132] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Valentin Smeets
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Eric M. Gaigneaux
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| | - Damien P. Debecker
- Institute of Condensed Matter and Nanosciences (IMCN) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1, Box L4.01.09 1348 Louvain-la-Neuve Belgium
| |
Collapse
|
8
|
Abstract
During the last two decades, electrospinning has become a very popular technique for the fabrication of nanofibers due to its low cost and simple handling. Nanofiber materials have found utilization in many areas such as medicine, sensors, batteries, etc. In catalysis, these materials also present important advantages, since they present a low resistance to internal diffusion and a high surface area to volume ratio. These advantages are mainly due to the diameter–length proportion. A bibliographic analysis on the applications of electrospun nanofibers in catalysis shows that there are two important groups of catalysts that are being investigated, based on TiO2 and in carbon materials. The main applications found are in photo- and in electro-catalysis. The present study contributes by reviewing these catalytic applications of electrospun nanofibers and demonstrating that they are promising materials as catalysts, underlining some works to prove the advantages and possibilities that these materials have as catalysts. On one hand, the possibilities of synthesis are almost infinite, since with coaxial electrospinning quite complex nanofibers with different layers can be prepared. On the other hand, the diameter and other properties can be controlled by monitoring the applied voltage and other parameters during the synthesis, being quite reproducible procedures. The main advantages of these materials can be grouped in two: one related to their morphology, as has been commented, relative to their low resistance and internal diffusion, that is, their fluidynamic behavior in the reactor; the second group involves advantages related to the fact that the active phases can be nanoscaled and dispersed, improving the activity and selectivity in comparison with conventional catalytic materials with the same chemical composition.
Collapse
|
9
|
Safa S, Ghaneian MT, Ehrampoush MH. Enhanced photocatalytic activity of efficient magnetically recyclable core-shell nanocomposites on 2,2',4,4',5,5'-hexachlorobiphenyl (PCB 153) degradation under UV-LED irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:54679-54694. [PMID: 34013417 DOI: 10.1007/s11356-021-14202-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
The congener polychlorinated biphenyls (PCBs) are one of the of persistent organic pollutant compounds that increase lifestyle-related diseases, such as diabetes, obesity, and cancer. So, 2,2',4,4',5,5'-hexachlorobiphenyl (PCB153), which is one of the most common PCB contaminants in nature, was selected as a model compound to study the photocatalytic degradation of Fe3O4@SiO2@TiO2 core-shell structure. In this work, Fe3O4@SiO2@TiO2 nanocomposite was synthesized and characterized using transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), energy-dispersive X-ray (EDS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and vibrating sample magnetometer (VSM) techniques. Then, the effect of parameters such as catalyst dosage, initial concentration of PCB 153, solution pH, amount of H2O2, and kind of co-solvent on photocatalytic degradation of PCB 153 by the synthesized nanocomposite was investigated. The high degradation efficiency of Fe3O4@SiO2@TiO2 nanocomposite, which was 96.5%, was obtained at 4 g/l of the catalysts, 4 ppm of PCB 153, pH 5, 20 mM H2O2, 2 h of reaction time, and acetone as a cosolvent. Also, the rate of mineralization for Fe3O4@SiO2@TiO2 nanocomposite with H2O2 and UV-LED irradiation was 75.3% which had a significant efficiency compared to control experiments. Moreover, the mentioned photocatalysts are possible to be reused through exposing to external magnetic field, with insignificant decrease in the catalytic activity even after 6 cycles. The photocatalytic degradation process has an effective and environmental friendly effect on the degradation of organic pollutants.
Collapse
Affiliation(s)
- Sorur Safa
- Department of Environmental Health Engineering, International Campus of Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | - Mohammad Taghi Ghaneian
- Environmental Sciences and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Hassan Ehrampoush
- Environmental Sciences and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| |
Collapse
|
10
|
Li F, Zhou Z, Qin J, Liu C, Liu Y, He B, Xia G, Wu W. Evaporation‐Induced Self‐Assembly Method Route to TiO
2
−SiO
2
Catalysts with Hierarchical Pores and Their Oximation of Ketones and Aldehydes. ChemistrySelect 2021. [DOI: 10.1002/slct.202100487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fanqing Li
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| | - Zhiwei Zhou
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| | - Juan Qin
- Productivity Center of Jiangsu Province Technology and Finance Service Center of Jiangsu Province Nanjing 210042 P. R. China
| | - Chuanfa Liu
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| | - Yangyang Liu
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| | - Binbin He
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| | - Guangbo Xia
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| | - Wenliang Wu
- College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
| |
Collapse
|
11
|
High Surface Area VOx/TiO2/SBA-15 Model Catalysts for Ammonia SCR Prepared by Atomic Layer Deposition. Catalysts 2020. [DOI: 10.3390/catal10121386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The mode of operation of titania-supported vanadia (VOx) catalysts for NOx abatement using ammonia selective catalytic reduction (NH3-SCR) is still vigorously debated. We introduce a new high surface area VOx/TiO2/SBA-15 model catalyst system based on mesoporous silica SBA-15 making use of atomic layer deposition (ALD) for controlled synthesis of titania and vanadia multilayers. The bulk and surface structure is characterized by X-ray diffraction (XRD), UV-vis and Raman spectroscopy, as well as X-ray photoelectron spectroscopy (XPS), revealing the presence of dispersed surface VOx species on amorphous TiO2 domains on SBA-15, forming hybrid Si–O–V and Ti–O–V linkages. Temperature-dependent analysis of the ammonia SCR catalytic activity reveals NOx conversion levels of up to ~60%. In situ and operando diffuse reflection IR Fourier transform (DRIFT) spectroscopy shows N–Hstretching modes, representing adsorbed ammonia and -NH2 and -NH intermediate structures on Bronsted and Lewis acid sites. Partial Lewis acid sites with adjacent redox sites are proposed as the active sites and desorption of product molecules as the rate-determining step at low temperature. The high NOx conversion is attributed to the presence of highly dispersed VOx species and the moderate acidity of VOx supported on TiO2/SBA-15.
Collapse
|
12
|
Sun Y, Fu T, Qin Z, Zhang M, Wu X, Wang H, Zhuang Q, Fan T, Zhao W. Influence of radiation damage on the structure and chemical durability of titanites. Appl Radiat Isot 2020; 164:109165. [DOI: 10.1016/j.apradiso.2020.109165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/19/2020] [Accepted: 03/26/2020] [Indexed: 11/26/2022]
|
13
|
Hu J, Tao L, Deng W, Liu L. Fabrication and sustained‐release property of vinyl silica hollow spheres as a delivery system for aroma compounds. FLAVOUR FRAG J 2020. [DOI: 10.1002/ffj.3616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jing Hu
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai P. R. China
- Department of Chemical Engineering The University of Melbourne Parkville Vic. Australia
| | - Li Tao
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai P. R. China
| | - Weijun Deng
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai P. R. China
| | - Liqin Liu
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai P. R. China
| |
Collapse
|
14
|
Sun Y, Wang H, Zhang M, Zhao W. Effect of leaching solutions on chemical durability of a natural metamict titanite. J NUCL SCI TECHNOL 2020. [DOI: 10.1080/00223131.2020.1724205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Yaping Sun
- Oncology Department, People’s Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
| | - Honglong Wang
- Institute of Materials, China Academy of Engineering Physics, Mianyang, China
| | - Ming Zhang
- Institute of Materials, China Academy of Engineering Physics, Mianyang, China
| | - Wangxiong Zhao
- Oncology Department, People’s Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
| |
Collapse
|
15
|
Khan SA, Vandervelden CA, Scott SL, Peters B. Grafting metal complexes onto amorphous supports: from elementary steps to catalyst site populationsviakernel regression. REACT CHEM ENG 2020. [DOI: 10.1039/c9re00357f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We use transition state theory, kernel regression, and population balance modeling techniques to model the grafting of metal complexes onto amorphous catalyst supports.
Collapse
Affiliation(s)
- Salman A. Khan
- Department of Chemical Engineering
- University of California
- Santa Barbara
- USA
| | | | - Susannah L. Scott
- Department of Chemical Engineering
- University of California
- Santa Barbara
- USA
- Department of Chemistry & Biochemistry
| | - Baron Peters
- Department of Chemical & Biomolecular Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
- Department of Chemistry
| |
Collapse
|
16
|
Datsko TY, Zelentsov VI. Nanoscale-TiO2/Diatomite Composite: Synthesis, Structure, and Thermal Stability. SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY 2019. [DOI: 10.3103/s1068375519060036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
Facile synthesis and kinetic mechanism of Ag-doped TiO2/SiO2 nanoparticles for phenol degradation under visible light irradiation. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-04023-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
18
|
Lu Z, Liu X, Zhang B, Gan Z, Tang S, Ma L, Wu T, Nelson GJ, Qin Y, Turner CH, Lei Y. Structure and reactivity of single site Ti catalysts for propylene epoxidation. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
19
|
Lang M, Klahn M, Strunk J. Photophysical and Catalytic Properties of Silica Supported Early Transition Metal Oxides Relevant for Photocatalytic Applications. Catal Letters 2019. [DOI: 10.1007/s10562-019-02803-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
20
|
Akita A, Kobayashi H, Tada H. Ultrathin Silicon Oxide Film-Induced Enhancement of Charge Separation and Transport of Nanostructured Titanium(IV) Oxide Photoelectrode. Chemphyschem 2019; 20:2054-2059. [PMID: 31260153 DOI: 10.1002/cphc.201900462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Indexed: 11/07/2022]
Abstract
The development of nanostructured semiconductor electrodes represented by a mesoporous TiO2 nanocrystalline (mp-TiO2 ) film is currently bringing great progresses in photoelectrochemical (PEC) devices for solar-to-electricity and solar-to-chemical conversion. Two serious losses can occur in PEC devices: 1) recombination between the conduction band (CB) electrons and valence band (VB) holes in the bulk and at the surface and 2) back reaction or electron trapping by oxidant in the electrolyte solution during transport to the electron-collecting electrode. Thus, the major challenge in common with the nanostructured semiconductor photoanodes is to achieve efficient charge separation and electron transport. In this study, an ultrathin SiOx layer was formed on both the external and the internal surface of mp-TiO2 using an original chemisorption-calcination technique employing 1,3,5,7-tetramethyltetrasiloxane as a starting material. The SiOx surface modification of the mp-TiO2 photoanode drastically prolongs the mean lifetime of CB-electrons in TiO2 because of enhanced charge separation and electron transport by the negative charge applied in aqueous electrolyte solution. We have demonstrated that the performance of a one-compartment H2 O2 -photofuel cell using mp-TiO2 as the photoanode is greatly boosted by the surface modification with the SiOx layer. We anticipate that this methodology is widely applicable to nanostructured metal oxide semiconductor electrodes, contributing to the improvement in the performance of PEC devices.
Collapse
Affiliation(s)
- Atsunobu Akita
- Graduate School of Science and Engineering, Kindai University 3-4-1, Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
| | | | - Hiroaki Tada
- Graduate School of Science and Engineering, Kindai University 3-4-1, Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
| |
Collapse
|
21
|
Vancea A, Kirkpatrick I, Worrall DR, Williams SL. Energy and electron transfer reactions on silica gel and titania–silica mixed oxide surfaces. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03901-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
22
|
Naqvi Q, Ratova M, Klaysri R, Kelly P, Edge M, Potgieter-Vermaak S, Tosheva L. Tuning the composition of porous resin-templated TiO2 macrobeads for optimized photocatalytic performance. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.06.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
23
|
Combined Magnesia, Ceria and Nickel catalyst supported over γ-Alumina Doped with Titania for Dry Reforming of Methane. Catalysts 2019. [DOI: 10.3390/catal9020188] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study investigated dry reforming of methane (DRM) over combined catalysts supported on γ-Al2O3 support doped with 3.0 wt. % TiO2. Physicochemical properties of all catalysts were determined by inductively coupled plasma/mass spectrometry (ICP-MS), nitrogen physisorption, X-ray diffraction, temperature programmed reduction/oxidation/desorption/pulse hydrogen chemisorption, thermogravimetric analysis, and scanning electron microscopy. Addition of CeO2 and MgO to Ni strengthened the interaction between the Ni and the support. The catalytic activity results indicate that the addition of CeO2 and MgO to Ni did not reduce carbon deposition, but improved the activity of the catalysts. Temperature programmed oxidation (TPO) revealed the formation of carbon that is mainly amorphous and small amount of graphite. The highest CH4 and CO2 conversion was found for the catalyst composed of 5.0 wt. % NiO-10.0 wt. % CeO2/3.0 wt. %TiO2-γ-Al2O3 (Ti-CAT-II), resulting in H2/CO mole ratio close to unity. The optimum reaction conditions in terms of reactant conversion and H2/CO mole ratio were achieved by varying space velocity and CO2/CH4 mole ratio.
Collapse
|
24
|
Mukhopadhyay P, Chakraborty R. Heterogeneous esterification kinetics of isopropyl oleate synthesis under non-ionizing excitation using nano-anatase imbued mesoporous catalyst. CHEM ENG COMMUN 2019. [DOI: 10.1080/00986445.2018.1534230] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Rajat Chakraborty
- Chemical Engineering Department, Jadavpur University, Kolkata, India
| |
Collapse
|
25
|
De Clercq R, Makshina E, Sels BF, Dusselier M. Catalytic Gas-Phase Cyclization of Glycolate Esters: A Novel Route Toward Glycolide-Based Bioplastics. ChemCatChem 2018. [DOI: 10.1002/cctc.201801469] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rik De Clercq
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Ekaterina Makshina
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Bert F. Sels
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Michiel Dusselier
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| |
Collapse
|
26
|
Harris JW, Arvay J, Mitchell G, Delgass WN, Ribeiro FH. Propylene oxide inhibits propylene epoxidation over Au/TS-1. J Catal 2018. [DOI: 10.1016/j.jcat.2018.06.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
27
|
De Clercq R, Dusselier M, Poleunis C, Debecker DP, Giebeler L, Oswald S, Makshina E, Sels BF. Titania-Silica Catalysts for Lactide Production from Renewable Alkyl Lactates: Structure–Activity Relations. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02216] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rik De Clercq
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Michiel Dusselier
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Claude Poleunis
- Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Damien P. Debecker
- Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Lars Giebeler
- Leibniz-Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, D-01069 Dresden, Germany
| | - Steffen Oswald
- Leibniz-Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, D-01069 Dresden, Germany
| | - Ekaterina Makshina
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Bert F. Sels
- Centre for Surface Chemistry and Catalysis, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| |
Collapse
|
28
|
Barroso-Martín I, Infantes-Molina A, Talon A, Storaro L, Rodríguez-Aguado E, Rodríguez-Castellón E, Moretti E. CO Preferential Photo-Oxidation in Excess of Hydrogen in Dark and Simulated Solar Light Irradiation over AuCu-Based Catalysts on SBA-15 Mesoporous Silica-Titania. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1203. [PMID: 30011796 PMCID: PMC6073442 DOI: 10.3390/ma11071203] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/26/2018] [Accepted: 07/10/2018] [Indexed: 12/13/2022]
Abstract
In this work, SBA-15 silica and silica-titania have been used as supports for photocatalysts based on AuCu alloy (Au:Cu = 1) to be used in the preferential oxidation of CO (CO-PROX) in excess of hydrogen at room temperature and atmospheric pressure both in the dark and under simulated solar light irradiation. To study their textural, structural, chemical and optical properties, the samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), adsorption-desorption of N₂ at -196 °C, 13C and 29Si solid state nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance ultraviolet-visible (DRUV-vis) spectroscopy. Titanium was present mainly in the form of titania aggregates, but also as small particles interacting with the SBA support. In both catalysts, the metal alloy nanoparticles displayed an average size of 4 nm as demonstrated by TEM measurements. AuCu/Ti-SBA turned out to be photoactive and selective in the photo-CO-PROX reaction showing the highest activity, with conversion and selectivity towards CO₂ of 80%, due both to the presence of titania incorporated in SBA-15 and to the synergistic effect of Cu when alloyed with Au.
Collapse
Affiliation(s)
- Isabel Barroso-Martín
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Antonia Infantes-Molina
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Aldo Talon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, Mestre, 30172 Venezia, Italy.
| | - Loretta Storaro
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, Mestre, 30172 Venezia, Italy.
| | - Elena Rodríguez-Aguado
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Elisa Moretti
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, Mestre, 30172 Venezia, Italy.
| |
Collapse
|
29
|
Structural Dynamics of Dispersed Titania During Dehydration and Oxidative Dehydrogenation Studied by In Situ UV Raman Spectroscopy. Catal Letters 2018. [DOI: 10.1007/s10562-018-2442-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
30
|
Barroso-Martín I, Moretti E, Talon A, Storaro L, Rodríguez-Castellón E, Infantes-Molina A. Au and AuCu Nanoparticles Supported on SBA-15 Ordered Mesoporous Titania-Silica as Catalysts for Methylene Blue Photodegradation. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E890. [PMID: 29799498 PMCID: PMC6025472 DOI: 10.3390/ma11060890] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/18/2018] [Accepted: 05/22/2018] [Indexed: 01/14/2023]
Abstract
The photocatalytic degradation of methylene blue (MB) dye has been performed under UV irradiation in aqueous suspension, employing photocatalysts based on Au (1.5 wt %) and AuCu (Au/Cu = 1, 2.0 wt %), and supported on SBA-15-ordered mesoporous silica, with and without titania (Si/Ti = 3), in order to evaluate the versatility of this mesoporous support in this type of reaction of great impact from the environmental point of view. Samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption-desorption at -196 °C, and X-ray photoelectron spectroscopy (XPS), so as to study their structural, optical, and chemical properties. All the prepared catalysts were found to be active in the test reaction. The bimetallic AuCu-based catalysts attained very high MB degradation values, in particular AuCu/SBA-15 titania-silica sample reached 100% of dye oxidation after the monitored reaction period (120 min).
Collapse
Affiliation(s)
- Isabel Barroso-Martín
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Elisa Moretti
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Aldo Talon
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Loretta Storaro
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy.
| | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - Antonia Infantes-Molina
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| |
Collapse
|
31
|
Characterization and reactivity of vanadium oxide supported on TiO 2 -SiO 2 mixed oxide support. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.01.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
32
|
Frunza L, Diamandescu L, Zgura I, Frunza S, Ganea CP, Negrila CC, Enculescu M, Birzu M. Photocatalytic activity of wool fabrics deposited at low temperature with ZnO or TiO2 nanoparticles: Methylene blue degradation as a test reaction. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.02.044] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
33
|
De Clercq R, Dusselier M, Makshina E, Sels BF. Catalytic Gas-Phase Production of Lactide from Renewable Alkyl Lactates. Angew Chem Int Ed Engl 2018; 57:3074-3078. [DOI: 10.1002/anie.201711446] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/27/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Rik De Clercq
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Michiel Dusselier
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Ekaterina Makshina
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Bert F. Sels
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| |
Collapse
|
34
|
De Clercq R, Dusselier M, Makshina E, Sels BF. Catalytic Gas-Phase Production of Lactide from Renewable Alkyl Lactates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711446] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rik De Clercq
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Michiel Dusselier
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Ekaterina Makshina
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| | - Bert F. Sels
- Centre for Surface Chemistry and Catalysis; KU Leuven; Celestijnenlaan 200F 3001 Heverlee Belgium
| |
Collapse
|
35
|
Catalytic Activity Studies of Vanadia/Silica–Titania Catalysts in SVOC Partial Oxidation to Formaldehyde: Focus on the Catalyst Composition. Catalysts 2018. [DOI: 10.3390/catal8020056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
36
|
Lee SS, Lu CY, Wu MC. Study of the structure and characteristics of mesoporous TiO2 photocatalyst, and evaluation of its factors on gaseous formaldehyde removal by the analysis of ANOVA and S/N ratio. RSC Adv 2018; 8:22199-22215. [PMID: 35541752 PMCID: PMC9081413 DOI: 10.1039/c8ra03557a] [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: 04/25/2018] [Accepted: 06/11/2018] [Indexed: 11/21/2022] Open
Abstract
This study differs from previous studies of TiO2/SiO2 in that 0.5–10 μm microsized TiO2-rutile based catalysts (TR catalysts) with varying proportions of titanium and silicon were synthesized using a one-step modified hydrothermal method. At Ti/Si = 1/9, a two-dimensional channel-structured catalyst with a morphology resembling that of SBA-15 was obtained. In contrast, at Ti/Si = 3/7 or 5/5, a three-dimensional porous structure was formed, and Ti–O–Si–C bonds appeared. The structure of the TR catalyst transformed due to the decrease in C–Si bond content and the increase in C–C bond content with increasing Ti/Si ratio. The results indicated that the rutile phase was the main crystal phase of the TR catalyst. The small crystal size and large rutile phase content of the mesoporous TR catalyst contributed to the low band gap energy below 3.0 eV. Under 2 × 10 W lamp irradiation with either UVA or visible light, the three TR catalysts showed better formaldehyde (HCHO) removal efficiency than P25. Furthermore, the Taguchi method was employed to evaluate the catalytic factors by analysis of variance (ANOVA) and S/N ratio. The results revealed the contributions of each of the three factors to HCHO removal efficiency over TR catalysts to be as follows: space velocity (62%), Ti ratio (32%), and time on stream (5%). The TR catalyst with Ti/Si = 1/9 showed good HCHO removal efficiency with a high SBET (787.1 m2 g−1) and large pore volume (0.95 cm3 g−1) for a residence time of over 2.29 × 10−1 s under visible light irradiation. Microwave-assisted EG reduction was successfully applied to dope a TR catalyst with nanosized Pt particles in a short synthesis time. After Pt doping, the removal efficiency in the stream improved and stabilized. The Pt particles were Pt0 and proved effective for improving the photocatalytic removal of HCHO over the TR catalyst by prolonging the separation time of the electron–hole pairs. Overall, the Pt/TR catalyst is a potential material for pollutant removal and can be easily separated from the pollutant removal system since the catalysts are microsized. This study differs from previous studies of TiO2/SiO2 in that 0.5–10 μm microsized TiO2-rutile based catalysts (TR catalysts) with varying proportions of titanium and silicon were synthesized using a one-step modified hydrothermal method.![]()
Collapse
Affiliation(s)
- Shiuan-Shinn Lee
- Department of Public Health
- Chung Shan Medical University
- Taichung 40201
- Republic of China
| | - Chi-Yuan Lu
- Department of Public Health
- Chung Shan Medical University
- Taichung 40201
- Republic of China
- Department of Family and Community Medicine
| | - Min-Chang Wu
- Department of Public Health
- Chung Shan Medical University
- Taichung 40201
- Republic of China
| |
Collapse
|
37
|
Effect of titania surface modification of mesoporous silica SBA-15 supported Au catalysts: Activity and stability in the CO oxidation reaction. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
38
|
Wu LK, Wu WY, Xia J, Cao HZ, Hou GY, Tang YP, Zheng GQ. Nanostructured NiCo@NiCoOx core-shell layer as efficient and robust electrocatalyst for oxygen evolution reaction. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.146] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
39
|
Thornburg NE, Notestein JM. Rate and Selectivity Control in Thioether and Alkene Oxidation with H
2
O
2
over Phosphonate‐Modified Niobium(V)–Silica Catalysts. ChemCatChem 2017. [DOI: 10.1002/cctc.201700526] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nicholas E. Thornburg
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Justin M. Notestein
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| |
Collapse
|
40
|
Hess C, Waleska P, Ratzka M, Janssens TVW, Rasmussen SB, Beato P. Hierarchical Vanadia Model Catalysts for Ammonia Selective Catalytic Reduction. Top Catal 2017. [DOI: 10.1007/s11244-017-0843-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
41
|
Active sites formation and their transformations during ethylene polymerization by the Phillips CrOx/SiO2 catalyst. J Catal 2017. [DOI: 10.1016/j.jcat.2017.05.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
42
|
Rivoira L, Martínez ML, Falcón H, Beltramone AR, Campos-Martin JM, Fierro JL, Tartaj P. Probing the Catalytic Activity of Sulfate-Derived Pristine and Post-Treated Porous TiO 2(101) Anatase Mesocrystals by the Oxidative Desulfurization of Dibenzothiophenes. ACS OMEGA 2017; 2:2351-2359. [PMID: 31457584 PMCID: PMC6641028 DOI: 10.1021/acsomega.7b00307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 05/04/2017] [Indexed: 06/10/2023]
Abstract
Mesocrystals (basically nanostructures showing alignment of nanocrystals well beyond crystal size) are attracting considerable attention for modeling and optimization of functionalities. However, for surface-driven applications (heterogeneous catalysis), only those mesocrystals with excellent textural properties are expected to fulfill their potential. This is especially true for oxidative desulfuration of dibenzothiophenes (hard to desulfurize organosulfur compounds found in fossil fuels). Here, we probe the catalytic activity of anatases for the oxidative desulfuration of dibenzothiophenes under atmospheric pressure and mild temperatures. Specifically, for this study, we have taken advantage of the high stability of the (101) anatase surface to obtain a variety of uniform colloidal mesocrystals (approximately 50 nm) with adequate orientational order and good textural properties (pores around 3-4 nm and surface areas around 200 m2/g). Ultimately, this stability has allowed us to compare the catalytic activity of anatases that expose a high number of aligned single crystal-like surfaces while differing in controllable surface characteristics. Thus, we have established that the type of tetrahedral coordination observed in these anatase mesocrystals is not essential for oxidative desulfuration and that both elimination of sulfates and good textural properties significantly improve the catalytic activity. Furthermore, the most active mesocrystals have been used to model the catalytic reaction in three-(oil-solvent-catalyst) and two-phase (solvent-catalyst) systems. Thus, we have been able to observe that the transfer of DBT from the oil to the solvent phase partially limits the oxidative process and to estimate an apparent activation energy for the oxidative desulfuration reaction of approximately 40 kJ/mol in the two-phase system to avoid mass transfer limitations. Our results clearly establish that (101) anatase mesocrystals with excellent textural properties show adequate stability to withstand several post-treatments without losing their initial mesocrystalline character and therefore could serve as models for catalytic processes different from the one studied here.
Collapse
Affiliation(s)
- Lorena
P. Rivoira
- NANOTEC
(Centro de Investigación en Nanociencia y Nanotecnología), Universidad Tecnológica Nacional—Facultad
Regional Córdoba, X5016ZAA Córdoba, Argentina
| | - Maria L. Martínez
- NANOTEC
(Centro de Investigación en Nanociencia y Nanotecnología), Universidad Tecnológica Nacional—Facultad
Regional Córdoba, X5016ZAA Córdoba, Argentina
| | - Horacio Falcón
- NANOTEC
(Centro de Investigación en Nanociencia y Nanotecnología), Universidad Tecnológica Nacional—Facultad
Regional Córdoba, X5016ZAA Córdoba, Argentina
| | - Andrea R. Beltramone
- NANOTEC
(Centro de Investigación en Nanociencia y Nanotecnología), Universidad Tecnológica Nacional—Facultad
Regional Córdoba, X5016ZAA Córdoba, Argentina
| | - Jose M. Campos-Martin
- Energy
and Sustainable Chemistry Group (EQS), Instituto
de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
| | - Jose L.G. Fierro
- Energy
and Sustainable Chemistry Group (EQS), Instituto
de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
| | - Pedro Tartaj
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
| |
Collapse
|
43
|
Chen Y, Liu H, Geng B, Ru J, Cheng C, Zhao Y, Wang L. A reusable surface-quaternized nanocellulose-based hybrid cryogel loaded with N-doped TiO2 for self-integrated adsorption/photo-degradation of methyl orange dye. RSC Adv 2017. [DOI: 10.1039/c7ra00450h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Self-integrated adsorption/photo-degradation of methyl orange dye.
Collapse
Affiliation(s)
- Yufei Chen
- School of Engineering
- Zhejiang Agriculture and Forestry University
- Hangzhou
- China
| | - Hongzhi Liu
- School of Engineering
- Zhejiang Agriculture and Forestry University
- Hangzhou
- China
- National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization
| | - Biyao Geng
- School of Engineering
- Zhejiang Agriculture and Forestry University
- Hangzhou
- China
| | - Jing Ru
- School of Engineering
- Zhejiang Agriculture and Forestry University
- Hangzhou
- China
| | - Chen Cheng
- School of Engineering
- Zhejiang Agriculture and Forestry University
- Hangzhou
- China
| | - Ying Zhao
- School of Engineering
- Zhejiang Agriculture and Forestry University
- Hangzhou
- China
| | - Likui Wang
- School of Chemical and Materials Engineering
- Jiangnan University
- Wuxi
- China
| |
Collapse
|
44
|
Lin CXC, Xu C, Yang Y, Lei C, Zhang H, Yu C. Dendritic mesoporous silica–titania nanospheres with enhanced photocatalytic activities. NEW J CHEM 2017. [DOI: 10.1039/c7nj00713b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dendritic mesoporous silica–titania nanospheres (DMSTN) show remarkable performance as a photocatalyst and an adsorbent for photochromic methylene green (MG) dye.
Collapse
Affiliation(s)
- Chun Xiang Cynthia Lin
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Chun Xu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
- School of Dentistry
| | - Yannan Yang
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Chang Lei
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Haijiao Zhang
- Institute of Nanochemistry and Nanobiology
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| |
Collapse
|
45
|
Hassan HMA, Mohamed SK, Ibrahim AA, Betiha MA, El-Sharkawy EA, Mousa AA. A comparative study of the incorporation of TiO2 into MCM-41 nanostructure via different approaches and its effect on the photocatalytic degradation of methylene blue and CO oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2016. [DOI: 10.1007/s11144-016-1124-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
46
|
Silica induced oxygen vacancies in supported mixed-phase TiO2 for photocatalytic degradation of phenol under visible light irradiation. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.09.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
47
|
Thornburg NE, Nauert SL, Thompson AB, Notestein JM. Synthesis−Structure–Function Relationships of Silica-Supported Niobium(V) Catalysts for Alkene Epoxidation with H2O2. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01796] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicholas E. Thornburg
- Department of Chemical and
Biological Engineering, Northwestern University, 2145 Sheridan Road, Technological
Institute E136, Evanston, Illinois 60208, United States
| | - Scott L. Nauert
- Department of Chemical and
Biological Engineering, Northwestern University, 2145 Sheridan Road, Technological
Institute E136, Evanston, Illinois 60208, United States
| | - Anthony B. Thompson
- Department of Chemical and
Biological Engineering, Northwestern University, 2145 Sheridan Road, Technological
Institute E136, Evanston, Illinois 60208, United States
| | - Justin M. Notestein
- Department of Chemical and
Biological Engineering, Northwestern University, 2145 Sheridan Road, Technological
Institute E136, Evanston, Illinois 60208, United States
| |
Collapse
|
48
|
On the dynamical nature of the active center in a single-site photocatalyst visualized by 4D ultrafast electron microscopy. Proc Natl Acad Sci U S A 2016; 113:503-8. [PMID: 26729878 DOI: 10.1073/pnas.1522869113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Understanding the dynamical nature of the catalytic active site embedded in complex systems at the atomic level is critical to developing efficient photocatalytic materials. Here, we report, using 4D ultrafast electron microscopy, the spatiotemporal behaviors of titanium and oxygen in a titanosilicate catalytic material. The observed changes in Bragg diffraction intensity with time at the specific lattice planes, and with a tilted geometry, provide the relaxation pathway: the Ti(4+)=O(2-) double bond transformation to a Ti(3+)-O(1-) single bond via the individual atomic displacements of the titanium and the apical oxygen. The dilation of the double bond is up to 0.8 Å and occurs on the femtosecond time scale. These findings suggest the direct catalytic involvement of the Ti(3+)-O(1-) local structure, the significance of nonthermal processes at the reactive site, and the efficient photo-induced electron transfer that plays a pivotal role in many photocatalytic reactions.
Collapse
|
49
|
Besançon M, Michelin L, Josien L, Vidal L, Assaker K, Bonne M, Lebeau B, Blin JL. Influence of the porous texture of SBA-15 mesoporous silica on the anatase formation in TiO2–SiO2 nanocomposites. NEW J CHEM 2016. [DOI: 10.1039/c5nj02859k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TiO2–SiO2 composites with 44 wt% of anatase exhibit a better MO degradation rate than those with fully crystallized anatase.
Collapse
Affiliation(s)
- Manon Besançon
- Université de Haute Alsace
- CNRS
- Equipe Matériaux à Porosité Contrôlée
- Institut de Science des Matériaux de Mulhouse
- UMR 7361
| | - Laure Michelin
- Université de Haute Alsace
- CNRS
- Equipe Matériaux à Porosité Contrôlée
- Institut de Science des Matériaux de Mulhouse
- UMR 7361
| | - Ludovic Josien
- Université de Haute Alsace
- CNRS
- Equipe Matériaux à Porosité Contrôlée
- Institut de Science des Matériaux de Mulhouse
- UMR 7361
| | - Loic Vidal
- Université de Haute Alsace
- CNRS
- Equipe Matériaux à Porosité Contrôlée
- Institut de Science des Matériaux de Mulhouse
- UMR 7361
| | - Karine Assaker
- SRSMC UMR 7565
- Université de Lorraine
- CNRS
- F-54506 Vandoeuvre-lès-Nancy Cedex
- France
| | - Magali Bonne
- Université de Haute Alsace
- CNRS
- Equipe Matériaux à Porosité Contrôlée
- Institut de Science des Matériaux de Mulhouse
- UMR 7361
| | - Bénédicte Lebeau
- Université de Haute Alsace
- CNRS
- Equipe Matériaux à Porosité Contrôlée
- Institut de Science des Matériaux de Mulhouse
- UMR 7361
| | - Jean-Luc Blin
- SRSMC UMR 7565
- Université de Lorraine
- CNRS
- F-54506 Vandoeuvre-lès-Nancy Cedex
- France
| |
Collapse
|
50
|
Wu Y, Döhler D, Barr M, Oks E, Wolf M, Santinacci L, Bachmann J. Atomic Layer Deposition from Dissolved Precursors. NANO LETTERS 2015; 15:6379-6385. [PMID: 26418724 DOI: 10.1021/acs.nanolett.5b01424] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We establish a novel thin film deposition technique by transferring the principles of atomic layer deposition (ALD) known with gaseous precursors toward precursors dissolved in a liquid. An established ALD reaction behaves similarly when performed from solutions. "Solution ALD" (sALD) can coat deep pores in a conformal manner. sALD offers novel opportunities by overcoming the need for volatile and thermally robust precursors. We establish a MgO sALD procedure based on the hydrolysis of a Grignard reagent.
Collapse
Affiliation(s)
- Yanlin Wu
- Department of Chemistry and Pharmacy, Friedrich-Alexander University of Erlangen-Nürnberg , Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Dirk Döhler
- Department of Chemistry and Pharmacy, Friedrich-Alexander University of Erlangen-Nürnberg , Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Maïssa Barr
- CNRS, CINaM UMR 7325, Aix Marseille Université , F-13288 Marseille, France
| | - Elina Oks
- Departments of Chemistry and Physics, University of Hamburg , Sedanstrasse 19, D-20146 Hamburg, Germany
| | - Marc Wolf
- Departments of Chemistry and Physics, University of Hamburg , Sedanstrasse 19, D-20146 Hamburg, Germany
| | - Lionel Santinacci
- CNRS, CINaM UMR 7325, Aix Marseille Université , F-13288 Marseille, France
| | - Julien Bachmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University of Erlangen-Nürnberg , Egerlandstrasse 1, D-91058 Erlangen, Germany
- Departments of Chemistry and Physics, University of Hamburg , Sedanstrasse 19, D-20146 Hamburg, Germany
| |
Collapse
|