1
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Zhang H, Hu C, Zhang P, Ren T, Cai W. Purification mechanism of microbial metabolism in kitchen-oil wastewater enhanced by cationic vacancies on γ-Al 2O 3. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166596. [PMID: 37640079 DOI: 10.1016/j.scitotenv.2023.166596] [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: 06/19/2023] [Revised: 08/10/2023] [Accepted: 08/24/2023] [Indexed: 08/31/2023]
Abstract
The use of catalyst materials to mediate the enhancement of microbial degradation in wastewater is a new economic and energy saving breakthrough in water treatment technology. In this study, γ-Al2O3, which is commonly used as catalyst/carrier, is used as biological filler to treat kitchen-oil wastewater with low biodegradability, and the COD removal rate is about 50 %. It is found that the complexation of cationic vacancies on Al2O3 surface with extracellular polymeric substance (EPS) secreted by microorganisms in wastewater lead to the polarization of electron distribution on biofilm. The efficient degrading bacteria are enriched on reaction interface and obtain electrons to maintain electron dynamic balance by enhancing the transmembrane metabolism of pollutants. The aluminum vacancies on Al2O3 surface accelerate the microbial degradation of pollutants. The cationic vacancies in the structure of catalyst accelerate the acquisition of exogenous electrons by microorganisms without the addition of external energy, which provides a new idea for catalytic fillers to enhance wastewater degradation.
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Affiliation(s)
- Han Zhang
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
| | - Chun Hu
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.
| | - Peng Zhang
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
| | - Tong Ren
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
| | - Wu Cai
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China
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2
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Gramatte S, Jeurgens LPH, Politano O, Simon Greminger JA, Baras F, Xomalis A, Turlo V. Atomistic Simulations of the Crystalline-to-Amorphous Transformation of γ-Al 2O 3 Nanoparticles: Delicate Interplay between Lattice Distortions, Stresses, and Space Charges. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6301-6315. [PMID: 37097742 DOI: 10.1021/acs.langmuir.2c03292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The size-dependent phase stability of γ-Al2O3 was studied by large-scale molecular dynamics simulations over a wide temperature range from 300 to 900 K. For the γ-Al2O3 crystal, a bulk transformation to α-Al2O3 by an FCC-to-HCP transition of the O sublattice is still kinetically hindered at 900 K. However, local distortions of the FCC O-sublattice by the formation of quasi-octahedral Al local coordination spheres become thermally activated, as driven by the partial covalency of the Al-O bond. On the contrary, spherical γ-Al2O3 nanoparticles (NPs) (with sizes of 6 and 10 nm) undergo a crystalline-to-amorphous transformation at 900 K, which starts at the reconstructed surface and propagates into the core through collective displacements of anions and cations, resulting in the formation of 7- and 8-fold local coordination spheres of Al. In parallel, the reconstructed Al-enriched surface is separated from the stoichiometric core by a diffuse Al-depleted transition region. This compositional heterogeneity creates an imbalance of charges inside the NP, which induces a net attractive Coulombic force that is strong enough to reverse the initial stress state in the NP core from compressive to tensile. These findings disclose the delicate interplay between lattice distortions, stresses, and space-charge regions in oxide nanosystems. A fundamental explanation for the reported expansion of metal-oxide NPs with decreasing size is provided, which has significant implications for, e.g., heterogeneous catalysis, NP sintering, and additive manufacturing of NP-reinforced metal matrix composites.
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Affiliation(s)
- Simon Gramatte
- Laboratory for Advanced Materials Processing, Empa - Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, Switzerland
- Laboratory for Joining Technologies and Corrosion, Empa - Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche-Comté, 9 Avenue A. Savary, Dijon F-91191, France
| | - Lars P H Jeurgens
- Laboratory for Joining Technologies and Corrosion, Empa - Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland
| | - Olivier Politano
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche-Comté, 9 Avenue A. Savary, Dijon F-91191, France
| | - Jose Antonio Simon Greminger
- Laboratory for Advanced Materials Processing, Empa - Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, Switzerland
| | - Florence Baras
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303, CNRS-Université Bourgogne Franche-Comté, 9 Avenue A. Savary, Dijon F-91191, France
| | - Angelos Xomalis
- Laboratory for Mechanics of Materials and Nanostructures, Empa - Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, Switzerland
| | - Vladyslav Turlo
- Laboratory for Advanced Materials Processing, Empa - Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, Switzerland
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3
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Extraction and characterization of highly pure alumina (α, γ, and θ) polymorphs from waste beverage cans: A viable waste management approach. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2022.104518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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4
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Influence of the metal − support and metal − metal interactions on Pd nucleation and NO adsorption in a Pd4/γ-Al2O3 (110D) model. J Mol Model 2022; 28:394. [DOI: 10.1007/s00894-022-05374-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 11/01/2022] [Indexed: 11/22/2022]
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5
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Ma R, Gao J, Kou J, Dean DP, Breckner CJ, Liang K, Zhou B, Miller JT, Zou G. Insights into the Nature of Selective Nickel Sites on Ni/Al 2O 3 Catalysts for Propane Dehydrogenation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rui Ma
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou515031, China
| | - Junxian Gao
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana47907, United States
| | - Jiajing Kou
- College of Vehicles and Energy, Yanshan University, Qinhuangdao066000, China
| | - David P. Dean
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana47907, United States
| | - Christian J. Breckner
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana47907, United States
| | - Kaijun Liang
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou515031, China
| | - Bo Zhou
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou515031, China
| | - Jeffrey T. Miller
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana47907, United States
| | - Guojun Zou
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou515031, China
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6
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Chavez-Esquivel G, García-Martínez JC, Cervantes-Cuevas H, Acosta D, Vera-Ramírez MA. Effect of thermo-alkali treatment on the morphological and electrochemical properties of biopolymer electrolytes based on corn starch–Al(OH)3. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03752-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Chen L, Wang JA, de la Fuente N, Zhou S, Jiang P, Song Y, Zhou X. Roles of the structural defects and the combined acidity of H3PW12O40/Zr-MCM-41 catalysts in ultralow sulfur diesel production. NEW J CHEM 2022. [DOI: 10.1039/d1nj04204a] [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
This work contributes to the production of ultralow-sulfur diesel using phosphotungstic acid immobilized on Zr-MCM-41 catalysts containing structural defects and combined acidity.
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Affiliation(s)
- Lifang Chen
- ESIQIE, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional s/n, Col. Zacatenco, Mexico City 07738, Mexico
| | - Jin An Wang
- ESIQIE, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional s/n, Col. Zacatenco, Mexico City 07738, Mexico
| | - Natali de la Fuente
- ESIQIE, Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional s/n, Col. Zacatenco, Mexico City 07738, Mexico
| | - Sinong Zhou
- International Joint Research Center of Green Energy and Chemical Engineering, Institute of Chemical Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Peng Jiang
- International Joint Research Center of Green Energy and Chemical Engineering, Institute of Chemical Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Yueqin Song
- International Joint Research Center of Green Energy and Chemical Engineering, Institute of Chemical Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Xiaolong Zhou
- International Joint Research Center of Green Energy and Chemical Engineering, Institute of Chemical Engineering, East China University of Science & Technology, Shanghai 200237, China
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8
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Vikár A, Solt HE, Novodárszki G, Mihályi MR, Barthos R, Domján A, Hancsók J, Valyon J, Lónyi F. A study of the mechanism of triglyceride hydrodeoxygenation over alumina-supported and phosphatized-alumina-supported Pd catalysts. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Dassanayake TM, Dassanayake AC, Abeydeera N, Pant BD, Jaroniec M, Kim MH, Huang SD. An aluminum lining to the dark cloud of silver resistance: harnessing the power of potent antimicrobial activity of γ-alumina nanoparticles. Biomater Sci 2021; 9:7996-8006. [PMID: 34714299 DOI: 10.1039/d1bm01233a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Although a biologically nonessential element in living organisms, aluminum is notably nontoxic to eukaryotic cells and has a venerable history of medicinal use. We demonstrate that polyethylene glycol-coated γ-alumina nanoparticles (Al2O3-NPs) with an average size of 15 nm prepared from a commercial bulk γ-alumina (γ-Al2O3) via the top-down sonication technique exhibit antibacterial activity that is comparable to that of AgNPs against both the Gram-negative drug-susceptible Pseudomonas aeruginosa (DSPA) and multidrug-resistant Pseudomonas aeruginosa (DRPA) bacteria, while the antibacterial activity of such Al2O3-NPs considerably surpasses that of AgNPs against both the Gram-positive methicillin-susceptible Staphylococcus aureus (DSSA) and methicillin-resistant Staphylococcus aureus (MRSA) bacteria. We also demonstrate that the DSPA bacteria sequentially exposed to Al2O3-NPs for 30 days show no indication of resistance development. Furthermore, such Al2O3-NPs can completely overcome the drug resistance developed in the conventional antibiotic ciprofloxacin-resistant and AgNP-resistant mutants without developing Al resistance.
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Affiliation(s)
- Thiloka M Dassanayake
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA.
| | - Arosha C Dassanayake
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA.
| | - Nalin Abeydeera
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA.
| | - Bishnu D Pant
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA.
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA.
| | - Min-Ho Kim
- Department of Biological Sciences, Kent State University, Kent, OH 44240, USA
| | - Songping D Huang
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA.
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10
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Abstract
Though γ-Al2O3 has played a central role in heterogeneous catalysis for more than two centuries, its microstructure continues to be debated. Specifically, the positions of Al3+ cations within the crystal lattice have been discussed extensively in the literature. Many authors uphold that the cations primarily occupy spinel sites, while others endorse the occupation of non-spinel sites. The other main point of dispute is whether the structure contains interstitial hydrogen, with some authors supporting a partially hydrated model and others claiming that the structure must be completely dehydrated. The use of different structural models directly affects the predicted geometry of γ-Al2O3 at the surface, which in turn has significant implications for its catalytic utility. A comparison of theoretical data to experimental infrared (IR), X-ray diffraction (XRD), and selected area electron diffraction (SAED) evidence suggests that γ-Al2O3 features cations primarily in spinel positions, while IR and nuclear magnetic resonance (NMR) data indicate that interstitial hydrogen is present within the bulk structure.
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11
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Zarinwall A, Waniek T, Saadat R, Braun U, Sturm H, Garnweitner G. Comprehensive Characterization of APTES Surface Modifications of Hydrous Boehmite Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:171-179. [PMID: 33355468 DOI: 10.1021/acs.langmuir.0c02682] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydrous boehmite (γ-AlOOH) nanoparticles (BNP) show great potential as nanoscale filler for the fabrication of fiber reinforced nanocomposite materials. Notably, the particle-matrix interaction has been demonstrated to be decisive for improving the matrix-dominant mechanical properties in the past years. Tailoring the surface properties of the nanofiller enables to selectively design the interaction and thus to exploit the benefits of the nanocomposite in an optimal way. Here, an extensive study is presented on the binding of (3-aminopropyl)triethoxysilane (APTES), a common silane surface modifier, on BNP in correlation to different process parameters (concentration, time, temperature, and pH). Furthermore, a comprehensive characterization of the modified BNP was performed by using elemental analysis (EA), thermogravimetric analysis (TGA) coupled with mass spectrometry (TGA-MS), and Kaiser's test (KT). The results show an increasing monolayer formation up to a complete surface coverage with rising APTES concentration, time, and temperature, resulting in a maximal grafting density of 1.3 molecules/nm2. Unspecific multilayer formation was solely observed under acidic conditions. Comparison of TGA-MS results with data recorded from EA, TGA, and KT verified that TGA-MS is a convenient and highly suitable method to elucidate the ligand binding in detail.
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Affiliation(s)
- Ajmal Zarinwall
- Institute for Particle Technology, Technische Universität Braunschweig, Volkmaroder Str. 5, 38104 Braunschweig, Germany
| | - Tassilo Waniek
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87,12205 Berlin, Germany
| | - Reza Saadat
- Institute for Particle Technology, Technische Universität Braunschweig, Volkmaroder Str. 5, 38104 Braunschweig, Germany
| | - Ulrike Braun
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87,12205 Berlin, Germany
| | - Heinz Sturm
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87,12205 Berlin, Germany
| | - Georg Garnweitner
- Institute for Particle Technology, Technische Universität Braunschweig, Volkmaroder Str. 5, 38104 Braunschweig, Germany
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12
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Jambhulkar DK, Ugwekar RP, Bhanvase BA, Barai DP. A review on solid base heterogeneous catalysts: preparation, characterization and applications. CHEM ENG COMMUN 2020. [DOI: 10.1080/00986445.2020.1864623] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Diksha K. Jambhulkar
- Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
| | - Rajendra P. Ugwekar
- Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
| | - Bharat A. Bhanvase
- Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
| | - Divya P. Barai
- Department of Chemical Engineering, Laxminarayan Institute of Technology, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
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13
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Effect of Gallium and Vanadium in NiMoV/Al2O3-Ga2O3 Catalysts on Indole Hydrodenitrogenation. Catal Letters 2020. [DOI: 10.1007/s10562-020-03438-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Jamil F, Aslam M, Al-Muhtaseb AH, Bokhari A, Rafiq S, Khan Z, Inayat A, Ahmed A, Hossain S, Khurram MS, Abu Bakar MS. Greener and sustainable production of bioethylene from bioethanol: current status, opportunities and perspectives. REV CHEM ENG 2020. [DOI: 10.1515/revce-2019-0026] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Abstract
The economic value of bioethylene produced from bioethanol dehydration is remarkable due to its extensive usage in the petrochemical industry. Bioethylene is produced through several routes, such as steam cracking of hydrocarbons from fossil fuel and dehydration of bioethanol, which can be produced through fermentation processes using renewable substrates such as glucose and starch. The rise in oil prices, environmental issues due to toxic emissions caused by the combustion of fossil fuel and depletion of fossil fuel resources have led a demand for an alternative pathway to produce green ethylene. One of the abundant alternative renewable sources for bioethanol production is biomass. Bioethanol produced from biomass is alleged to be a competitive alternative to bioethylene production as it is environmentally friendly and economical. In recent years, many studies have investigated catalysts and new reaction engineering pathways to enhance the bioethylene yield and to lower reaction temperature to drive the technology toward economic feasibility and practicality. This paper critically reviews bioethylene production from bioethanol in the presence of different catalysts, reaction conditions and reactor technologies to achieve a higher yield and selectivity of ethylene. Techno-economic and environmental assessments are performed to further development and commercialization. Finally, key issues and perspectives that require utmost attention to facilitate global penetration of technology are highlighted.
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Affiliation(s)
- Farrukh Jamil
- Department of Chemical Engineering , COMSATS University Islamabad (CUI) , Lahore Campus, Defense Road, Off Raiwind Road , Lahore , Pakistan
| | - Muhammad Aslam
- Department of Chemical Engineering , COMSATS University Islamabad (CUI) , Lahore Campus, Defense Road, Off Raiwind Road , Lahore , Pakistan
| | - Ala’a H. Al-Muhtaseb
- Department of Petroleum and Chemical Engineering , College of Engineering, Sultan Qaboos University , Muscat , Oman
| | - Awais Bokhari
- Department of Chemical Engineering , COMSATS University Islamabad (CUI) , Lahore Campus, Defense Road, Off Raiwind Road , Lahore , Pakistan
| | - Sikander Rafiq
- Department of Chemical, Polymer and Composite Material Engineering , University of Engineering and Technology , Lahore – New Campus , Pakistan
| | - Zakir Khan
- Department of Chemical Engineering , COMSATS University Islamabad (CUI) , Lahore Campus, Defense Road, Off Raiwind Road , Lahore , Pakistan
| | - Abrar Inayat
- Department of Sustainable and Renewable Energy Engineering , University of Sharjah , 27272 Sharjah , United Arab Emirates
| | - Ashfaq Ahmed
- Department of Chemical Engineering , COMSATS University Islamabad (CUI) , Lahore Campus, Defense Road, Off Raiwind Road , Lahore , Pakistan
- School of Environmental Engineering , University of Seoul , Seoul, 02504 , Republic of Korea
| | - Shakhawat Hossain
- Department of Industrial and Production Engineering , Jashore University of Science and Technology , Jashore-7408 , Bangladesh
| | - Muhammad Shahzad Khurram
- Department of Chemical Engineering , COMSATS University Islamabad (CUI) , Lahore Campus, Defense Road, Off Raiwind Road , Lahore , Pakistan
| | - Muhammad S. Abu Bakar
- Faculty of Integrated Technologies , Universiti Brunei Darussalam , Jalan Tungku Link , BE1410, Gadong , Brunei Darussalam
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15
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Araújo JC, Pinheiro AL, Oliveira AC, Cruz MG, Bueno JM, Araujo RS, Lang R. Catalytic assessment of nanostructured Pt/xLa2O3-Al2O3 oxides for hydrogen production by dry reforming of methane: Effects of the lanthana content on the catalytic activity. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.04.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Borah P, Yamashita Y, Kobayashi S. Solid Superbase‐Catalyzed Stereoselective 1,4‐Addition Reactions of Simple Amides in Batch and Continuous‐Flow Systems. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900364] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Parijat Borah
- Department of Chemistry, School of Science, The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yasuhiro Yamashita
- Department of Chemistry, School of Science, The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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18
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Liu Y, Pan Y, Wang H, Liu Y, Liu C. Ordered mesoporous Cu-ZnO-Al 2 O 3 adsorbents for reactive adsorption desulfurization with enhanced sulfur saturation capacity. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63085-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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19
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Hou L, Du W, Qu M, Wang X, Wang S, Shi S, Sun Y, Gao J, Xu J. Self-Assembled Nickel Nanoparticles Supported on Mesoporous Aluminum Oxide for Selective Hydrogenation of Isophorone. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Leilei Hou
- School of Textile and Material Engineering; Dalian Polytechnic University; Dalian 116034 People's Republic of China
- State Key Laboratory of Catalysis; Dalian National Laboratory for Clean Energy; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 People's Republic of China
| | - Wenqiang Du
- State Key Laboratory of Catalysis; Dalian National Laboratory for Clean Energy; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 People's Republic of China
| | - Minjie Qu
- School of Textile and Material Engineering; Dalian Polytechnic University; Dalian 116034 People's Republic of China
| | - Xinhong Wang
- School of Textile and Material Engineering; Dalian Polytechnic University; Dalian 116034 People's Republic of China
| | - Shuwei Wang
- School of Textile and Material Engineering; Dalian Polytechnic University; Dalian 116034 People's Republic of China
| | - Song Shi
- State Key Laboratory of Catalysis; Dalian National Laboratory for Clean Energy; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 People's Republic of China
| | - Ying Sun
- State Key Laboratory of Catalysis; Dalian National Laboratory for Clean Energy; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 People's Republic of China
| | - Jin Gao
- State Key Laboratory of Catalysis; Dalian National Laboratory for Clean Energy; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 People's Republic of China
| | - Jie Xu
- State Key Laboratory of Catalysis; Dalian National Laboratory for Clean Energy; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 People's Republic of China
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20
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Roy S, Maity A, Mandal P, Chanda DK, Pal K, Bardhan S, Das S. Effects of various morphologies on the optical and electrical properties of boehmite nanostructures. CrystEngComm 2018. [DOI: 10.1039/c8ce01171k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reports the variations in the fluorescence and ultra-high dielectric properties of various boehmite nano-structures.
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Affiliation(s)
- Shubham Roy
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
| | - Anupam Maity
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
- School of Materials Science
| | - Paulami Mandal
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
| | - Dipak Kr. Chanda
- Advanced Materials and Mechanical Characterization Division
- CSIR-Central Glass and Ceramics Research Institute
- Kolkata-700032
- India
- School of Materials Science and Nano Technology
| | - Kunal Pal
- Department of Life Science and Biotechnology
- Jadavpur University
- Kolkata-700032
- India
| | | | - Sukhen Das
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
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21
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Pérez-Pastenes H, Barrales-Cortés CA, Viveros T. Al2O3-CeO2 Oxides: Synthesis, Characterization and Evaluation as Catalytic Supports in Benzene Combustion. Surface Ceria Effects. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2017. [DOI: 10.1515/ijcre-2017-0143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Al2O3-CeO2 sol-gel oxides were obtained at ceria loadings of 2, 5, 10, 20 and 50 wt.%, calcined at 700 °C and characterized by N2 physisorption, XRD, TEM, 27Al MAS-NMR, and TPR. All samples present high amounts of surface ceria species and bulk ceria has significant presence from 20 wt.% of ceria. The sample with 50 wt.% presents both the reduction of bulk and interfacial ceria species and X-ray diffraction peaks corresponding to cerianite phase. Surface ceria dispersion degree (surface ceria/total reduced ceria) was determined to be 100 % for samples with 2 and 5 wt.% CeO2, with a slight decrease to ca. 90 % and 75 % for samples with 10 and 20 wt.% CeO2 respectively, and a lower value of 41 % for the sample with 50 wt.% CeO2. It was found the amount of surface ceria has a good correlation with the amount of AlV sites, indicating that incorporated Ce ions distorts the alumina matrix and restricts the amount of surface ceria. Platinum supported on these materials showed that the catalytic activity in benzene combustion for oxygen-depleted environments increased as the surface ceria concentration increased.
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22
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Dong J, Wang J, Shi L, Yang J, Wang J, Shan B, Shen M. Hydrogenous spinel γ-alumina structure. Phys Chem Chem Phys 2017; 19:27389-27396. [PMID: 28972601 DOI: 10.1039/c7cp04704e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure of γ-Al2O3 is still under debate. Here we report a H spinel structure evolved from pseudo-boehmite. A unit cell with two octahedral cationic vacancies and one bulk H was preferential in terms of calculated Gibbs energy, which was well consistent with experimental data. Bulk H was found to migrate out with elevated temperatures. Through calculating the migration barriers of every step, we observed that the "hopping" step was rate-determining. The hopping rates were further estimated by assuming a Boltzmann distribution of energies, and as a result they increased by 2 to 3 orders of magnitude from 500 °C to 800 °C. This investigation will encourage us to study more uncertainties in material structures.
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Affiliation(s)
- Jinshi Dong
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China.
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Li X, Hufnagel S, Xu H, Valdes SA, Thakkar SG, Cui Z, Celio H. Aluminum (Oxy)Hydroxide Nanosticks Synthesized in Bicontinuous Reverse Microemulsion Have Potent Vaccine Adjuvant Activity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:22893-22901. [PMID: 28621928 PMCID: PMC5556926 DOI: 10.1021/acsami.7b03965] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Insoluble aluminum salts such as aluminum (oxy)hydroxide are commonly used as vaccine adjuvants. Recently, there is evidence suggesting that the adjuvant activity of aluminum salt-based materials is tightly related to their physicochemical properties, including nanometer-scale size, shape with long aspect ratio, and low degree of crystallinity. Herein, for the first time, the bicontinuous reverse microemulsion (RM) technique was utilized to synthesize stick-like monodisperse aluminum (oxy)hydroxide nanoparticles with a long aspect ratio of ∼10, length of ∼80 nm, and low degree of crystallinity (denoted as Al-nanosticks). Moreover, the relationship between the physicochemical properties of Al-nanosticks and the bicontinuous RM was discussed. Compared to the commercial Alhydrogel, which contains micrometer-scale aluminum oxyhydroxide particular aggregates with moderate degree of crystallinity, the Al-nanosticks are more effective in adsorbing and delivering antigens (e.g., ovalbumin, OVA) into antigen-presenting cells, activating inflammasomes, and potentiating OVA-specific antibody responses in a mouse model. It is concluded that the aluminum (oxy)hydroxide nanosticks synthesized in the bicontinuous RM are promising new aluminum salt-based vaccine adjuvants.
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Affiliation(s)
- Xu Li
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Stephanie Hufnagel
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Haiyue Xu
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Solange A. Valdes
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Sachin G. Thakkar
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
| | - Zhengrong Cui
- The University of Texas at Austin, College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, Texas, U.S.A
- Inner Mongolia Medical University, Inner Mongolia Key Laboratory of Molecular Biology, Hohhot, Inner Mongolia, China
| | - Hugo Celio
- The University of Texas at Austin, Texas Materials Institute, Austin, Texas, U.S.A
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24
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Ni H, Guo Y, Wang L, Guo Y, Zhan W, Lu G. Facile synthesis of highly thermal-stable doped alumina with high surface area by low temperature solid-state reaction. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.03.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Potter ME, Cho KM, Lee JJ, Jones CW. Role of Alumina Basicity in CO 2 Uptake in 3-Aminopropylsilyl-Grafted Alumina Adsorbents. CHEMSUSCHEM 2017; 10:2192-2201. [PMID: 28388018 DOI: 10.1002/cssc.201700115] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 04/02/2017] [Indexed: 06/07/2023]
Abstract
Oxide-supported amine materials are widely known to be effective CO2 sorbents under simulated flue-gas and direct-air-capture conditions. Most work has focused on amine species loaded onto porous silica supports, though potential stability advantages may be offered through the use of porous alumina supports. Unlike silica materials, which are comparably inert, porous alumina materials can be tuned to have substantial acidity and/or basicity. Owing to their amphoteric nature, alumina supports play a more active role in CO2 sorption than silica supports, potentially directly participating in the adsorption process. In this work, primary amines associated with 3-aminopropyltriethoxysilane are grafted onto two different mesoporous alumina materials having different levels of basicity. Adsorbent materials with different amine loadings are prepared, and the CO2 -adsorption behavior of similar amines on the two alumina supports is demonstrated to be different. At low amine loadings, the inherent properties of the support surface play a significant role, whereas at high amine loadings, when the alumina surface is effectively blocked, the sorbents prepared on the two supports behave similarly. At high amine loadings, amine-CO2 -amine interactions are shown to dominate, leading to adsorbed species that appear similar to the species formed over silica-supported amine materials. The sorbent properties are comprehensively characterized using N2 physisorption analysis, in situ FTIR spectroscopy, and adsorption microcalorimetry.
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Affiliation(s)
- Matthew E Potter
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, NW, Atlanta, GA, 30332, USA
| | - Kyeong Min Cho
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, NW, Atlanta, GA, 30332, USA
- Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea
| | - Jason J Lee
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, NW, Atlanta, GA, 30332, USA
| | - Christopher W Jones
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, NW, Atlanta, GA, 30332, USA
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26
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Xu R, Zhang M, Mortimer RJG, Pan G. Enhanced Phosphorus Locking by Novel Lanthanum/Aluminum-Hydroxide Composite: Implications for Eutrophication Control. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:3418-3425. [PMID: 28225266 DOI: 10.1021/acs.est.6b05623] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lanthanum (La) bearing materials have been widely used to remove phosphorus (P) in water treatment. However, it remains a challenge to enhance phosphate (PO4) adsorption capacity and La usage efficiency. In this study, La was coprecipitated with aluminum (Al) to obtain a La/Al-hydroxide composite (LAH) for P adsorption. The maximum PO4 adsorption capacities of LAH (5.3% La) were 76.3 and 45.3 mg P g-1 at pH 4.0 and 8.5, which were 8.5 and 5.3 times higher than those of commercially available La-modified bentonite (Phoslock, 5.6% La), respectively. P K-edge X-ray absorption near edge structure analysis showed that PO4 was preferentially bonded with Al under weakly acid conditions (pH 4.0), while tended to associate with La under alkaline conditions (pH 8.5). La LIII-edge extended X-ray absorption fine structure analysis indicated that PO4 was bonded on La sites by forming inner sphere bidentate-binuclear complexes and oxygen defects exhibited on LAH surfaces, which could be active adsorption sites for PO4. The electrostatic interaction, ligand exchange, and oxygen defects on LAH surfaces jointly facilitated PO4 adsorption but with varied contribution under different pH conditions. The combined contribution of two-component of La and Al may be an important direction for the next generation of commercial products for eutrophication mitigation.
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Affiliation(s)
- Rui Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Meiyi Zhang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
| | - Robert J G Mortimer
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University , Brackenhurst Campus, Nottinghamshire NG25 0QF, United Kingdom
| | - Gang Pan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University , Brackenhurst Campus, Nottinghamshire NG25 0QF, United Kingdom
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27
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Dong J, Wang J, Wang J, Yang M, Li W, Shen M. Enhanced thermal stability of palladium oxidation catalysts using phosphate-modified alumina supports. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01534h] [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]
Abstract
Alumina with 5.0 μmol m−2 phosphorus additives could retain a higher Pd dispersion after aging, resulting in much higher CO oxidation activity.
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Affiliation(s)
- Jinshi Dong
- Key Laboratory for Green Chemical Technology of State Education Ministry
- School of Chemical Engineering & Technology
- Tianjin University
- Tianjin 300072
- P.R. China
| | - Jun Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry
- School of Chemical Engineering & Technology
- Tianjin University
- Tianjin 300072
- P.R. China
| | - Jianqiang Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry
- School of Chemical Engineering & Technology
- Tianjin University
- Tianjin 300072
- P.R. China
| | - Ming Yang
- Chemical and Materials Systems Laboratory
- General Motors Global Research and Development
- Warren
- USA
| | - Wei Li
- Chemical and Materials Systems Laboratory
- General Motors Global Research and Development
- Warren
- USA
| | - Meiqing Shen
- Key Laboratory for Green Chemical Technology of State Education Ministry
- School of Chemical Engineering & Technology
- Tianjin University
- Tianjin 300072
- P.R. China
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28
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Yu Y, Zhu M, Fang J. Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method. RSC Adv 2017. [DOI: 10.1039/c6ra26601k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report the formation of alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding alumina sol containing a small amount of polyvinyl alcohol through nozzles into ammonia water.
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Affiliation(s)
- Yuxi Yu
- Department of Materials Science and Engineering
- College of Materials
- Fujian Key Laboratory of Advanced Materials
- Xiamen University
- Xiamen 361005
| | - Mengwei Zhu
- Department of Materials Science and Engineering
- College of Materials
- Fujian Key Laboratory of Advanced Materials
- Xiamen University
- Xiamen 361005
| | - Jiyu Fang
- Department of Materials Science and Engineering
- Advanced Materials Processing and Analysis Center
- University of Central Florida
- Orlando
- USA
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29
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Petrova EV, Dresvyannikov AF, Ahmadi Daryakenari M, Khairullina AI. Physicochemical properties of precursors of Al2O3–ZrO2 oxide ceramics prepared by electrochemical method. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2016. [DOI: 10.1134/s0036024416050241] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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30
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Yao M, Chen J, Su Z, Peng Y, Zou P, Yao X. Anodic Oxidation in Aluminum Electrode by Using Hydrated Amorphous Aluminum Oxide Film as Solid Electrolyte under High Electric Field. ACS APPLIED MATERIALS & INTERFACES 2016; 8:11100-11107. [PMID: 27070754 DOI: 10.1021/acsami.6b00945] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dense and nonporous amorphous aluminum oxide (AmAO) film was deposited onto platinized silicon substrate by sol-gel and spin coating technology. The evaporated aluminum film was deposited onto the AmAO film as top electrode. The hydrated AmAO film was utilized as a solid electrolyte for anodic oxidation of the aluminum electrode (Al) film under high electric field. The hydrated AmAO film was a high efficiency electrolyte, where a 45 nm thick Al film was anodized completely on a 210 nm thick hydrated AmAO film. The current-voltage (I-V) characteristics and breakdown phenomena of a dry and hydrated 210 nm thick AmAO film with a 150 nm thick Al electrode pad were studied in this work. Breakdown voltage of the dry and hydrated 210 nm thick AmAO film were 85 ± 3 V (405 ± 14 MV m(-1)) and 160 ± 5 V (762 ± 24 MV m(-1)), respectively. The breakdown voltage of the hydrated AmAO film increased about twice, owing to the self-healing behavior (anodic oxidation reaction). As an intuitive phenomenon of the self-healing behavior, priority anodic oxidation phenomena was observed in a 210 nm thick hydrated AmAO film with a 65 nm thick Al electrode pad. The results suggested that self-healing behavior (anodic oxidation reaction) was occurring nearby the defect regions of the films during I-V test. It was an effective electrical self-healing method, which would be able to extend to many other simple and complex oxide dielectrics and various composite structures.
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Affiliation(s)
- Manwen Yao
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University , 4800 Cao-an Hwy., Shanghai 201804, China
| | - Jianwen Chen
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University , 4800 Cao-an Hwy., Shanghai 201804, China
| | - Zhen Su
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University , 4800 Cao-an Hwy., Shanghai 201804, China
| | - Yong Peng
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University , 4800 Cao-an Hwy., Shanghai 201804, China
| | - Pei Zou
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University , 4800 Cao-an Hwy., Shanghai 201804, China
| | - Xi Yao
- Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University , 4800 Cao-an Hwy., Shanghai 201804, China
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31
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Claude V, Vilaseca M, Tatton AS, Damblon C, Lambert SD. Influence of the Method of Aqueous Synthesis and the Nature of the Silicon Precursor on the Physicochemical Properties of Porous Alumina. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501383] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vincent Claude
- Department of Chemical Engineering; Nanomaterials Catalysis and Electrochemistry, B6a, University of Liege, 4000 Liège, Belgium, http://www.nce.ulg.ac.be/
| | | | - Andrew S. Tatton
- Structural Biological Chemistry Laboratory, University of Liege, Liège, Belgium
| | - Christian Damblon
- Structural Biological Chemistry Laboratory, University of Liege, Liège, Belgium
| | - Stéphanie D. Lambert
- Department of Chemical Engineering; Nanomaterials Catalysis and Electrochemistry, B6a, University of Liege, 4000 Liège, Belgium, http://www.nce.ulg.ac.be/
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32
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Thabet MS, Ismaiel AM. Sol-Gel <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> Nanoparticles Assessment of the Removal of Eosin Yellow Using: Adsorption, Kinetic and Thermodynamic Parameters. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/jeas.2016.63007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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Yang H, Xie Y, Hao G, Cai W, Guo X. Preparation of porous alumina microspheres via an oil-in-water emulsion method accompanied by a sol–gel process. NEW J CHEM 2016. [DOI: 10.1039/c5nj02509e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous alumina microspheres prepared via a facile template-free approach followed by heat-treatment, exhibiting a three-dimensional interconnected structure.
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Affiliation(s)
- Hui Yang
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Yuan Xie
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Guisong Hao
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Weiwei Cai
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Xingzhong Guo
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
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34
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Chng LL, Yang J, Ying JY. Efficient Synthesis of Amides and Esters from Alcohols under Aerobic Ambient Conditions Catalyzed by a Au/Mesoporous Al2 O3 Nanocatalyst. CHEMSUSCHEM 2015; 8:1916-25. [PMID: 25925279 DOI: 10.1002/cssc.201403469] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 03/11/2015] [Indexed: 05/21/2023]
Abstract
An efficient heterogeneous Au/mesoporous alumina nanocatalyst has been successfully developed for the synthesis of amides and esters from simple building blocks of readily available alcohols and amines. The processes were simple and were performed at room temperature and atmospheric pressure of O2 to form the desired products with up to 97 % isolated yield. The ability of Au/mesoporous alumina to catalyze these reactions under ambient conditions further enhances the sustainability of these chemical processes. Furthermore, the nanocatalyst was stable to air and water and could be recovered and reused easily. The enhanced catalytic activity of Au/mesoporous alumina might be attributed to the presence of negatively charged Au nanoparticles that could promote oxidation processes as well as the stability of the mesoporous alumina support calcined at a high temperature of 800 °C.
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Affiliation(s)
- Leng Leng Chng
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Jinhua Yang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore)
| | - Jackie Y Ying
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669 (Singapore).
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35
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Abidli A. One-pot direct synthesis route to self-assembled highly ordered Zn-decorated mesoporous aluminium oxide toward efficient and sustainable metathesis heterogeneous catalyst design. RSC Adv 2015. [DOI: 10.1039/c5ra12057h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Zn-modified well-ordered mesoporous alumina successfully synthesizedviaone-pot process and evaluated as support for rhenium-based catalyst for methyl oleate self-metathesis.
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Affiliation(s)
- Abdelnasser Abidli
- Department of Soil Sciences and Agri-Food Engineering
- Laval University
- Quebec City
- Canada
- Centre in Green Chemistry and Catalysis (CGCC)
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36
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Abidli A, Hamoudi S, Belkacemi K. Synthesis, characterization and insights into stable and well organized hexagonal mesoporous zinc-doped alumina as promising metathesis catalysts carrier. Dalton Trans 2015; 44:9823-38. [DOI: 10.1039/c4dt03630a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ZnCl2-modified hexagonal mesoporous alumina was successfully synthesized, yielding Al–O–Zn–Cl species for supporting methyltrioxorhenium towards methyl oleate self-metathesis.
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Affiliation(s)
- Abdelnasser Abidli
- Department of Soil Sciences and Agri-Food Engineering
- Laval University
- Quebec city
- Canada
- Centre in Green Chemistry and Catalysis (CGCC)
| | - Safia Hamoudi
- Department of Soil Sciences and Agri-Food Engineering
- Laval University
- Quebec city
- Canada
- Centre in Green Chemistry and Catalysis (CGCC)
| | - Khaled Belkacemi
- Department of Soil Sciences and Agri-Food Engineering
- Laval University
- Quebec city
- Canada
- Centre in Green Chemistry and Catalysis (CGCC)
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37
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Wang W, Zhang Z, Zu G, Shen J, Zou L, Lian Y, Liu B, Zhang F. Trimethylethoxysilane-modified super heat-resistant alumina aerogels for high-temperature thermal insulation and adsorption applications. RSC Adv 2014. [DOI: 10.1039/c4ra08832h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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38
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Samain L, Jaworski A, Edén M, Ladd DM, Seo DK, Javier Garcia-Garcia F, Häussermann U. Structural analysis of highly porous γ-Al2O3. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.05.004] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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39
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Guo RT, Zhen WL, Pan WG, Hong JN, Jin Q, Ding CG, Guo SY. Low-temperature selective catalytic reduction of NO on CeO2-CuO/Al2O3 catalysts prepared by different methods. ENVIRONMENTAL TECHNOLOGY 2014; 35:1766-1772. [PMID: 24956769 DOI: 10.1080/09593330.2014.881424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
CeO2-CuO/Al2O3 catalysts were prepared by three different methods and their activities for selective catalytic reduction (SCR) of NO with NH3 were investigated. As can be seen from the experimental results, the catalyst prepared by the single-step sol-gel (SG) method showed the best SCR activity and resistance to SO2 and H2O. In order to investigate the relationship between the preparation method and the performance of SCR catalysts, the catalysts were characterized by using Brunauer-Emmett-Teller, X-ray diffraction, temperature programmed reduction with hydrogen, temperature programmed desorption with ammonia, X-ray photoelectron spectroscopy, Fourier transform infrared and thermo-gravimetric analysis techniques. It was found that the excellent performance of CeO2-CuO/Al2O3 catalyst prepared by the single-step SG method should be resulted from its large surface area, low crystallinity, high oxygen storage capacity, high NH3 adsorption capacity, high concentration of surface chemisorbed oxygen, weak sulphation process and weak water absorption.
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40
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Xiu F, Lin H, Fang M, Dong G, Yip S, Ho JC. Fabrication and enhanced light-trapping properties of three-dimensional silicon nanostructures for photovoltaic applications. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2013-1119] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn order to make photovoltaics an economically viable energy solution, next-generation solar cells with higher energy conversion efficiencies and lower costs are urgently desired. Among many possible solutions, three-dimensional (3D) silicon nanostructures with excellent light-trapping properties are one of the promising candidates and have recently attracted considerable attention for cost-effective photovoltaic applications. This is because their enhanced light-trapping characteristics and high carrier collection efficiencies can enable the use of cheaper and thinner silicon materials. In this review, recent developments in the controllable fabrication of 3D silicon nanostructures are summarized, followed by the investigation of optical properties on a number of different nanostructures, including nanowires, nanopillars, nanocones, nanopencils, and nanopyramids, etc. Even though nanostructures with radial p-n junction demonstrate excellent photon management properties and enhanced photo-carrier collection efficiencies, the photovoltaic performance of nanostructure-based solar cells is still significantly limited due to the high surface recombination effect, which is induced by high-density surface defects as well as the large surface area in high-aspect-ratio nanostructures. In this regard, various approaches in reducing the surface recombination are discussed and an overall geometrical consideration of both light-trapping and recombination effects to yield the best photovoltaic properties are emphasized.
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Affiliation(s)
| | - Hao Lin
- 1Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Ming Fang
- 1Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Guofa Dong
- 1Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China
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41
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Low Concentration Fe-Doped Alumina Catalysts Using Sol-Gel and Impregnation Methods: The Synthesis, Characterization and Catalytic Performance during the Combustion of Trichloroethylene. MATERIALS 2014; 7:2062-2086. [PMID: 28788556 PMCID: PMC5453295 DOI: 10.3390/ma7032062] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 02/26/2014] [Accepted: 03/04/2014] [Indexed: 11/29/2022]
Abstract
The role of iron in two modes of integration into alumina catalysts was studied at 0.39 wt% Fe and tested in trichloroethylene combustion. One modified alumina was synthesized using the sol-gel method with Fe added in situ during hydrolysis; another modification was performed using calcined alumina, prepared using the sol-gel method and impregnated with Fe. Several characterization techniques were used to study the level of Fe modification in the γ-Al2O3 phase formed and to correlate the catalytic properties during trichloroethylene (TCE) combustion. The introduction of Fe in situ during the sol-gel process influenced the crystallite size, and three iron species were generated, namely, magnetite, maghemite and hematite. The impregnated Fe-alumina formed hematite and maghemite, which were highly dispersed on the γ-Al2O3 surface. The X-ray photoelectron spectra (XPS), FT-IR and Mössbauer spectroscopy analyses revealed how Fe interacted with the γ-Al2O3 lattice in both catalysts. The impregnated Fe-catalyst showed the best catalytic performance compared to the catalyst that was Fe-doped in situ by the sol-gel method; both had better catalytic activity than pure alumina. This difference in activity was correlated with the accessibility of the reactants to the hematite iron species on the surface. The chlorine poisoning for all three catalysts was less than 1.8%.
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Zhen W, Li B, Lu G, Ma J. Enhancing catalytic activity and stability for CO2 methanation on Ni–Ru/γ-Al2O3via modulating impregnation sequence and controlling surface active species. RSC Adv 2014. [DOI: 10.1039/c3ra47982j] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Co-impregnation and sequential impregnation were used to prepare a series of Ni–Ru/γ-Al2O3 catalysts for CO2 methanation. By comparing the structure, surface species and catalytic performances, we uncovered the surface species segregation of Ru in Ni–Ru catalysts, and its effect on catalytic properties.
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Affiliation(s)
- Wenlong Zhen
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou, China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
| | - Bo Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou, China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
| | - Gongxuan Lu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000, P. R. China
| | - Jiantai Ma
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou, China
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Sanwaria AR, Nagar M, Bohra R, Chaudhary A, Mobin SM, Mathur P, Choudhary BL. Sol–gel synthesis of highly pure α-Al2O3 nano-rods from a new class of precursors of salicylaldehyde-modified aluminum(iii) isopropoxide. Crystal and molecular structure of [Al(OC6H4CHO)3]. RSC Adv 2014. [DOI: 10.1039/c4ra03245d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis and characterization of salicylaldehyde-modified aluminum(III) isopropoxide, [(OPri)3−nAl(OC6H4CHO)n] precursors used for sol–gel synthesis of α-Al2O3 nano-rods.
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Affiliation(s)
| | - Meena Nagar
- Department of Chemistry
- University of Rajasthan
- Jaipur-302004, India
| | - Rakesh Bohra
- Department of Chemistry
- University of Rajasthan
- Jaipur-302004, India
| | - Archana Chaudhary
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Shaikh M. Mobin
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Pradeep Mathur
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
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Quddus MR, Hossain MM, de Lasa HI. Ni based oxygen carrier over γ-Al2O3 for chemical looping combustion: Effect of preparation method on metal support interaction. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.02.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Santolalla C, Chavez-Esquivel G, Reyes-Heredia JADL, Alvarez-Ramirez J. Fractal Correlation Analysis of X-ray Diffraction Patterns with Broad Background. Ind Eng Chem Res 2013. [DOI: 10.1021/ie303069y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Santolalla
- Chemical Engineering
Department, Division de Ciencias Basicas e Ingenieria, Universidad
Autonoma Metropolitana-Iztapalapa, Apartado Postal 55-534, Mexico
D.F., 09340 Mexico
| | - G. Chavez-Esquivel
- Chemical Engineering
Department, Division de Ciencias Basicas e Ingenieria, Universidad
Autonoma Metropolitana-Iztapalapa, Apartado Postal 55-534, Mexico
D.F., 09340 Mexico
| | - J. A. de los Reyes-Heredia
- Chemical Engineering
Department, Division de Ciencias Basicas e Ingenieria, Universidad
Autonoma Metropolitana-Iztapalapa, Apartado Postal 55-534, Mexico
D.F., 09340 Mexico
| | - J. Alvarez-Ramirez
- Chemical Engineering
Department, Division de Ciencias Basicas e Ingenieria, Universidad
Autonoma Metropolitana-Iztapalapa, Apartado Postal 55-534, Mexico
D.F., 09340 Mexico
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Synthesis of flower-like Boehmite (γ-AlOOH) via a one-step ionic liquid-assisted hydrothermal route. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.03.049] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Rozita Y, Brydson R, Comyn TP, Scott AJ, Hammond C, Brown A, Chauruka S, Hassanpour A, Young NP, Kirkland AI, Sawada H, Smith RI. A Study of Commercial Nanoparticulate γ-Al2O3Catalyst Supports. ChemCatChem 2013. [DOI: 10.1002/cctc.201200880] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Smith SJ, Amin S, Woodfield BF, Boerio-Goates J, Campbell BJ. Phase Progression of γ-Al2O3 Nanoparticles Synthesized in a Solvent-Deficient Environment. Inorg Chem 2013; 52:4411-23. [DOI: 10.1021/ic302593f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Samrat Amin
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, United
States
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Park JH, Cho JH, Kang SE, Cho KH, Lee TW, Han HS, Shin CH. Low-temperature CO oxidation over water tolerant Pt catalyst supported on Al-modified CeO2. KOREAN J CHEM ENG 2013. [DOI: 10.1007/s11814-012-0207-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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