1
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Zhang S, Gong X, Shi Q, Ping G, Xu H, Waleed A, Li G. CuO Nanoparticle-Decorated TiO 2-Nanotube Heterojunctions for Direct Synthesis of Methyl Formate via Photo-Oxidation of Methanol. ACS OMEGA 2020; 5:15942-15948. [PMID: 32656415 PMCID: PMC7345414 DOI: 10.1021/acsomega.0c01169] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/25/2020] [Indexed: 05/21/2023]
Abstract
Methyl formate is widely employed as one of the important organic intermediates in C1 chemistry and as an environmentally benign chemical in the emerging area of "green chemistry". We here study the catalytic effectiveness of CuO/TiO2-nanotube nanocomposites for the direct synthesis of methyl formate via methanol photo-oxidation in this paper. The CuO/TiO2-nanotube nanocomposites with 7% CuO weight loading give a promising photocatalytic performance (over 93.3% methanol conversion and 89.4% methyl formate selectivity) at 25 °C under 365 nm UV irradiation. The turnover frequency and the apparent quantum efficiency reach up to 22.9 molmethanol gcat -1 h-1 and 57.6% over 7% CuO/TiO2-nanotube, respectively, which is mainly because of the effective minimization of the recombination of photogenerated electrons and holes by the surface ultrasmall-sized CuO particles. Furthermore, these CuO/TiO2-nanotube nanocomposites exhibit excellent durability and robust nature during the catalytic processes of the methanol photo-oxidation to methyl formate. The experimental results demonstrate the promise of the robust CuO/TiO2 nanocomposites for efficient and green production of methyl formate, which may offer guidelines for the design of efficient catalysts for selective alcohol conversion to other valuable chemicals.
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Affiliation(s)
- Shuwei Zhang
- College
of Science, Inner Mongolia Key Laboratory of Soil Quality and Nutrient
Resource, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Xia Gong
- College
of Science, Inner Mongolia Key Laboratory of Soil Quality and Nutrient
Resource, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Quanquan Shi
- College
of Science, Inner Mongolia Key Laboratory of Soil Quality and Nutrient
Resource, Inner Mongolia Agricultural University, Hohhot 010018, China
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Dalian 116023, China
| | - Guichen Ping
- College
of Science, Inner Mongolia Key Laboratory of Soil Quality and Nutrient
Resource, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Hui Xu
- College
of Science, Inner Mongolia Key Laboratory of Soil Quality and Nutrient
Resource, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Ammara Waleed
- School
of Chemistry and Chemical Engineering, Qufu
Normal University, Qufu 273165, China
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Dalian 116023, China
| | - Gao Li
- School
of Chemistry and Chemical Engineering, Qufu
Normal University, Qufu 273165, China
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Dalian 116023, China
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2
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Zhang W, Innocenti G, Oulego P, Gitis V, Wu H, Ensing B, Cavani F, Rothenberg G, Shiju NR. Highly Selective Oxidation of Ethyl Lactate to Ethyl Pyruvate Catalyzed by Mesoporous Vanadia-Titania. ACS Catal 2018. [PMID: 29527403 PMCID: PMC5839604 DOI: 10.1021/acscatal.7b03843] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
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The
direct oxidative dehydrogenation of lactates with molecular
oxygen is a “greener” alternative for producing pyruvates.
Here we report a one-pot synthesis of mesoporous vanadia–titania
(VTN), acting as highly efficient and recyclable catalysts for the
conversion of ethyl lactate to ethyl pyruvate. These VTN materials
feature high surface areas, large pore volumes, and high densities
of isolated vanadium species, which can expose the active sites and
facilitate the mass transport. In comparison to homogeneous vanadium
complexes and VOx/TiO2 prepared
by impregnation, the meso-VTN catalysts showed superior activity,
selectivity, and stability in the aerobic oxidation of ethyl lactate
to ethyl pyruvate. We also studied the effect of various vanadium
precursors, which revealed that the vanadium-induced phase transition
of meso-VTN from anatase to rutile depends strongly on the vanadium
precursor. NH4VO3 was found to be the optimal
vanadium precursor, forming more monomeric vanadium species. V4+ as the major valence state was incorporated into the lattice
of the NH4VO3-derived VTN material, yielding
more V4+–O–Ti bonds in the anatase-dominant
structure. In situ DRIFT spectroscopy and density functional theory
calculations show that V4+–O–Ti bonds are
responsible for the dissociation of ethyl lactate over VTN catalysts
and for further activation of the deprotonation of β-hydrogen.
Molecular oxygen can replenish the surface oxygen to regenerate the
V4+–O–Ti bonds.
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Affiliation(s)
- Wei Zhang
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090GD Amsterdam, The Netherlands
| | - Giada Innocenti
- Dipartimento
di Chimica Industriale, ALMA MATER STUDIORUM Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
- Consorzio
INSTM, UdR di Bologna, Firenze, Italy
| | - Paula Oulego
- Department
of Chemical and Environmental Engineering, University of Oviedo, C/Julián Clavería, s/n., E-33071, Oviedo, Spain
| | - Vitaly Gitis
- Unit
of Environmental Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Haihong Wu
- Shanghai
Key Laboratory of Green Chemistry and Chemical Processes, Department
of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, People’s Republic of China
| | - Bernd Ensing
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090GD Amsterdam, The Netherlands
| | - Fabrizio Cavani
- Dipartimento
di Chimica Industriale, ALMA MATER STUDIORUM Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
- Consorzio
INSTM, UdR di Bologna, Firenze, Italy
| | - Gadi Rothenberg
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090GD Amsterdam, The Netherlands
| | - N. Raveendran Shiju
- Van
’t Hoff Institute for Molecular Sciences, University of Amsterdam, P.O. Box 94157, 1090GD Amsterdam, The Netherlands
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3
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Zhang W, Innocenti G, Ferbinteanu M, Ramos-Fernandez EV, Sepulveda-Escribano A, Wu H, Cavani F, Rothenberg G, Shiju NR. Understanding the oxidative dehydrogenation of ethyl lactate to ethyl pyruvate over vanadia/titania. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02309j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We studied the vapour-phase oxidative dehydrogenation of ethyl lactate to ethyl pyruvate over V2O5/TiO2 catalysts in a fixed-bed reactor.
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Affiliation(s)
- Wei Zhang
- Van't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090GD Amsterdam
- The Netherlands
| | - Giada Innocenti
- Dipartimento di Chimica Industriale
- ALMA MATER STUDIORUM Università di Bologna
- 40136 Bologna
- Italy
- Consorzio INSTM
| | - Marilena Ferbinteanu
- Faculty of Chemistry
- Inorganic Chemistry Department
- University of Bucharest
- Bucharest 020462
- Romania
| | - Enrique V. Ramos-Fernandez
- Laboratorio de Materiales Avanzados
- Departamento de Química Inorgánica-Instituto Universitario de Materiales
- Universidad de Alicante
- E-03690 San Vicente del Raspeig
- Spain
| | - Antonio Sepulveda-Escribano
- Laboratorio de Materiales Avanzados
- Departamento de Química Inorgánica-Instituto Universitario de Materiales
- Universidad de Alicante
- E-03690 San Vicente del Raspeig
- Spain
| | - Haihong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai
- China
| | - Fabrizio Cavani
- Dipartimento di Chimica Industriale
- ALMA MATER STUDIORUM Università di Bologna
- 40136 Bologna
- Italy
- Consorzio INSTM
| | - Gadi Rothenberg
- Van't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090GD Amsterdam
- The Netherlands
| | - N. Raveendran Shiju
- Van't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090GD Amsterdam
- The Netherlands
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4
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Chen X, Liu D, Wu Z, Cravotto G, Wu Z, Ye BC. Microwave-assisted rapid synthesis of Ag-β-cyclodextrin/TiO2/AC with exposed {001} facets for highly efficient naphthalene degradation under visible light. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2017.10.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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5
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Han D, Bao Z, Xing H, Yang Y, Ren Q, Zhang Z. Fabrication of plasmonic Au-Pd alloy nanoparticles for photocatalytic Suzuki-Miyaura reactions under ambient conditions. NANOSCALE 2017; 9:6026-6032. [PMID: 28443911 DOI: 10.1039/c7nr01950e] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The Suzuki-Miyaura reaction is one of the most popular and efficient routes for the formation of carbon-carbon bonds in both laboratorial and industrial synthetic processes. Here, we report for the first time that a Au-Pd/TiO2 catalyst could be utilized efficiently for Suzuki-Miyaura reactions at ambient conditions under visible light with high activity and reusability. Mechanistic investigation by means of experimental methods revealed that through the strong local surface plasma resonance of Au under the visible light, the hot electrons of Au could be injected into Pd in the bimetallic nanoparticles, thus facilitating activation of the aryl halides. Meanwhile, the electropositive Au tended to gain electrons from TiO2, resulting in the separation of the photogenerated electron/hole pairs of TiO2, which enabled the holes to activate aryl boronic acids. This Au-Pd/TiO2 catalyst not only expands the application scope of Suzuki-Miyaura reactions under mild conditions but will also inspire further exploitation of the direct harvesting of visible light by nanomaterials for a wide range of chemical reactions.
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Affiliation(s)
- Dongxu Han
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou 310027, China.
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6
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Zheng Y, Zhang X, Yang P. Preparation of hexagonal prism anatase with high thermal stability from a HTiOF3precursor. CrystEngComm 2017. [DOI: 10.1039/c6ce02383e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Yang L, Jiang H, Wang W, Chu D, Yang J, Zhang M, Lv J, Wang B, He G, Sun Z. Enhanced photoelectronic properties of single crystal TiO2 nanosheet array films by selective deposition of CdS nanoparticles on their {101} facets. CrystEngComm 2016. [DOI: 10.1039/c5ce01905b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The selective deposition of CdS nanoparticles on the {101} facets of TiO2 enhances the spatial separation of electrons and holes on different facets, thereby improving their photoelectronic properties.
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Affiliation(s)
- Lei Yang
- School of Physics & Material Science
- Anhui University
- Hefei 230601, PR China
- Army Officer Academy
- Hefei 230031, PR China
| | - Haiyan Jiang
- Hefei University of Technology
- Hefei 230009, PR China
| | | | - Delin Chu
- Army Officer Academy
- Hefei 230031, PR China
| | | | - Miao Zhang
- School of Physics & Material Science
- Anhui University
- Hefei 230601, PR China
| | - Jianguo Lv
- School of Electronic & Information Engineering
- Hefei Normal University
- Hefei 230601, PR China
| | | | - Gang He
- School of Physics & Material Science
- Anhui University
- Hefei 230601, PR China
| | - Zhaoqi Sun
- School of Physics & Material Science
- Anhui University
- Hefei 230601, PR China
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