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Raspberry Colloid Templated Catalysts Fabricated Using Spray Drying Method. Catalysts 2022. [DOI: 10.3390/catal13010060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The majority of industrial chemical processes—from production of organic and inorganic compounds to air and water treatment—rely on heterogeneous catalysts. The performance of these catalysts has improved over the past several decades; in parallel, many innovations have been presented in publications, demonstrating increasingly higher efficiency and selectivity. One common challenge to adopting novel materials in real-world applications is the need to develop robust and cost-effective synthetic procedures for their formation at scale. Herein, we focus on the scalable production of a promising new class of materials—raspberry-colloid-templated (RCT) catalysts—that have demonstrated exceptional thermal stability and high catalytic activity. The unique synthetic approach used for the fabrication of RCT catalysts enables great compositional flexibility, making these materials relevant to a wide range of applications. Through a series of studies, we identified stable formulations of RCT materials that can be utilized in the common industrial technique of spray drying. Using this approach, we demonstrate the production of highly porous Pt/Al2O3 microparticles with high catalytic activity toward complete oxidation of toluene as a model reaction.
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Fu K, Su Y, Zheng Y, Han R, Liu Q. Novel monolithic catalysts for VOCs removal: A review on preparation, carrier and energy supply. CHEMOSPHERE 2022; 308:136256. [PMID: 36113653 DOI: 10.1016/j.chemosphere.2022.136256] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/24/2022] [Accepted: 08/26/2022] [Indexed: 06/15/2023]
Abstract
Volatile organic compounds (VOCs) are considered the culprit of secondary air pollution such as ozone, secondary organic aerosols, and photochemical smog. Among various technologies, catalytic oxidation is considered a promising method for the post-treatment of VOCs. Researchers are sparing no effort to develop novel catalysts to meet the requirements of the catalytic process. Compared with the powdered or granular catalysts, the monolithic catalysts have the advantages of low pressure drop, high utilization of active phases, and excellent mechanical properties. This review summarized the new design of monolithic catalysts (including new preparation methods, new supports, and new energy supply methods) for the post-treatment of VOCs. It addressed the advantages of the new designs in detail, and the scope of applicability for each new monolithic catalyst was also highlighted. Finally, the highly required future development trends of monolithic catalysts for VOCs catalytic oxidation are recommended. We expect this work can inspire and guide researchers from both academic and industrial communities, and help pave the way for breakthroughs in fundamental research and industrial applications in this field.
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Affiliation(s)
- Kaixuan Fu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300350, China
| | - Yun Su
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300350, China
| | - Yanfei Zheng
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300350, China
| | - Rui Han
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300350, China.
| | - Qingling Liu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin, 300350, China; State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin, 300350, China.
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NiO nanosheet array integrated monoliths for low temperature catalytic propane oxidation: A study on the promotion effect of Ce doping. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.07.086] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Shirman T, Toops TJ, Shirman E, Shneidman AV, Liu S, Gurkin K, Alvarenga J, Lewandowski MP, Aizenberg M, Aizenberg J. Raspberry colloid-templated approach for the synthesis of palladium-based oxidation catalysts with enhanced hydrothermal stability and low-temperature activity. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.03.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Ohmura JF, Burpo FJ, Lescott CJ, Ransil A, Yoon Y, Records WC, Belcher AM. Highly adjustable 3D nano-architectures and chemistries via assembled 1D biological templates. NANOSCALE 2019; 11:1091-1102. [PMID: 30574649 DOI: 10.1039/c8nr04864a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Porous metal nanofoams have made significant contributions to a diverse set of technologies from separation and filtration to aerospace. Nonetheless, finer control over nano and microscale features must be gained to reach the full potential of these materials in energy storage, catalytic, and sensing applications. As biologics naturally occur and assemble into nano and micro architectures, templating on assembled biological materials enables nanoscale architectural control without the limited chemical scope or specialized equipment inherent to alternative synthetic techniques. Here, we rationally assemble 1D biological templates into scalable, 3D structures to fabricate metal nanofoams with a variety of genetically programmable architectures and material chemistries. We demonstrate that nanofoam architecture can be modulated by manipulating viral assembly, specifically by editing the viral surface coat protein, as well as altering templating density. These architectures were retained over a broad range of compositions including monometallic and bi-metallic combinations of noble and transition metals of copper, nickel, cobalt, and gold. Phosphorous and boron incorporation was also explored. In addition to increasing the surface area over a factor of 50, as compared to the nanofoam's geometric footprint, this process also resulted in a decreased average crystal size and altered phase composition as compared to non-templated controls. Finally, templated hydrogels were deposited on the centimeter scale into an array of substrates as well as free standing foams, demonstrating the scalability and flexibility of this synthetic method towards device integration. As such, we anticipate that this method will provide a platform to better study the synergistic and de-coupled effects between nano-structure and composition for a variety of applications including energy storage, catalysis, and sensing.
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Affiliation(s)
- Jacqueline F Ohmura
- Departments of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, 76-561, Cambridge, Massachusetts 02139, USA
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Lu X, Hoang S, Tang W, Du S, Wang S, Liu F, Zhong W, Suib SL, Yang G, Zhang FY, Gao PX. Direct Synthesis of Conformal Layered Protonated Titanate Nanoarray Coatings on Various Substrate Surfaces Boosted by Low-Temperature Microwave-Assisted Hydrothermal Synthesis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35164-35174. [PMID: 30239188 DOI: 10.1021/acsami.8b11801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Layered protonated titanates (LPTs) are promising support materials for catalytic applications because their high surface area and cation exchange capacity provide the possibility of achieving a high metal dispersion. However, the reported LPT nanomaterials are mainly limited to free-standing nanoparticles (NPs) and usually require high temperature and pressure conditions with extended reaction time. In this work, a high-throughput microwave-assisted hydrothermal method was developed for the direct synthesis of conformal LPT nanoarray coatings onto the three-dimensional honeycomb monoliths as well as other substrate surfaces at low temperature (75-95 °C) and pressure (1 atm). Using TiCl3 as the titanium source, H2O2 as the oxidant, and hydrochloric acid as the pH controller, a peroxotitanium complex (PTC) was formed and identified to play an essential role for the formation of LPT nanoarrays. The gaseous O2 released during the decomposition of PTC promotes the mass transfer of the precursors, making this method applicable to substrates with complex geometries. With the optimized conditions, a growth rate of 42 nm/min was achieved on cordierite monolith substrates. When loaded with Pt NPs, the LPT nanoarray-based monolithic catalysts showed excellent low-temperature catalytic activity for CO and hydrocarbon oxidation as well as satisfactory hydrothermal stability and mechanical robustness. The low temperature and pressure requirements of this facile hydrothermal method overcome the size- and pressure-seal restrictions of the reactors, making it feasible for scaled production of LPT nanoarray-based devices for various applications.
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Affiliation(s)
| | | | | | | | | | | | | | - Steven L Suib
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
| | - Gaoqiang Yang
- Department of Mechanical, Aerospace & Biomedical Engineering, UT Space Institute , University of Tennessee , Knoxville , Tennessee , 37996 , United States
| | - Feng-Yuan Zhang
- Department of Mechanical, Aerospace & Biomedical Engineering, UT Space Institute , University of Tennessee , Knoxville , Tennessee , 37996 , United States
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Wang S, Du S, Tang W, Hoang S, Lu X, Xiao W, Zhang B, Weng J, Schneer E, Guo Y, Ding J, Zhang Z, Gao P. Mesoporous Perovskite Nanotube‐Array Enhanced Metallic‐State Platinum Dispersion for Low Temperature Propane Oxidation. ChemCatChem 2018. [DOI: 10.1002/cctc.201702048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sibo Wang
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Shoucheng Du
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Wenxiang Tang
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Son Hoang
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Xingxu Lu
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Wen Xiao
- Department of Materials Science and Engineering National University of Singapore Singapore 119260 Singapore
| | - Bo Zhang
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Junfei Weng
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Evan Schneer
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
| | - Yanbing Guo
- Key Laboratory of Pesticide & Chemical Biology of, Ministry of Education College of Chemistry Central China Normal University Wuhan 430079 P.R. China
| | - Jun Ding
- Department of Materials Science and Engineering National University of Singapore Singapore 119260 Singapore
| | - Zhaoliang Zhang
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry, and Chemical Materials University of Jinan No. 336, West Road of Nan Xinzhuang Jinan 250022 P.R. China
| | - Pu‐Xian Gao
- Department of Materials Science and Engineering &, Institute of Materials Science University of Connecticut 97 N. Eagleville Road Storrs CT USA
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Nano-Array Integrated Structured Catalysts: A New Paradigm upon Conventional Wash-Coated Monolithic Catalysts? Catalysts 2017. [DOI: 10.3390/catal7090253] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Yamada Y, Ito K, Miura A, Iizuka H, Wakayama H. Simple and scalable preparation of master mold for nanoimprint lithography. NANOTECHNOLOGY 2017; 28:205303. [PMID: 28445164 DOI: 10.1088/1361-6528/aa6a9f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanoimprint lithography (NIL) is one of the most prominent bottom-up techniques for duplicating nanostructures with a high throughput. However, fabrication of starting master mold commonly requires expensive equipment of top-down techniques, or additional steps to transfer the fabricated patterns from bottom-up methods. Here we demonstrate that a SiO2 nanostructure manufactured from a self-assembled block copolymer, polystyrene-b-polydimethylsiloxane (PS-b-PDMS), directly serves as a master mold for NIL without further modification. A hexagonally aligned pattern over the entire substrate is established using a simple technique; solvent annealing and etching. Etching also plays an important role in endowing fluorine on the surface of SiO2, thus promoting smooth demolding upon imprinting. The obtained pattern of the SiO2 nanostructure is transferred to a polymer surface using UV nanoimprint. Identical patterns of the SiO2 nanostructure are elaborately reproduced on Ni and Cu nanodot arrays via electroplating on the polymer transcript, which was verified by morphological observations. The uniformity of the replicated Ni nanodot array is evaluated using spectroscopic ellipsometry. The measured optical response of the Ni nanodot is validated by electromagnetically simulated results, indicating that the pattern transfer is not limited to a small local area. In addition, the durability of the SiO2 mold pattern is corroborated after the imprinting process, thus guaranteeing the reusability of the fabricated nanostructure as a master mold. The proposed approach does not require any high-end lithographic techniques; this may result in significant cost and time reductions in future nanofabrication.
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Affiliation(s)
- Yuri Yamada
- Toyota Central Research & Development Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi, 480-1192, Japan
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Wang S, Wu Y, Miao R, Zhang M, Lu X, Zhang B, Kinstler A, Ren Z, Guo Y, Lu T, Suib SL, Gao PX. Scalable continuous flow synthesis of ZnO nanorod arrays in 3-D ceramic honeycomb substrates for low-temperature desulfurization. CrystEngComm 2017. [DOI: 10.1039/c7ce00921f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrothermal based continuous flow synthesis demonstrates a highly efficient strategy of integrating nanostructure arrays onto 3-D channeled honeycomb substrates.
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Affiliation(s)
- Sibo Wang
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
| | - Yunchao Wu
- Department of Mechanical Engineering
- University of Connecticut
- USA
| | - Ran Miao
- Department of Chemistry
- University of Connecticut
- USA
| | - Mingwan Zhang
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
| | - Xingxu Lu
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
| | - Bo Zhang
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
| | - Alexander Kinstler
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
| | - Zhuyin Ren
- Department of Mechanical Engineering
- University of Connecticut
- USA
- Center for Combustion Energy
- Tsinghua University
| | - Yanbing Guo
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
| | - Tianfeng Lu
- Department of Mechanical Engineering
- University of Connecticut
- USA
| | | | - Pu-Xian Gao
- Department of Materials Science and Engineering & Institute of Materials Science
- University of Connecticut
- USA
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