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Altomare M, Qin S, Saveleva VA, Badura Z, Tomanec O, Mazare A, Zoppellaro G, Vertova A, Taglietti A, Minguzzi A, Ghigna P, Schmuki P. Metastable Ni(I)-TiO 2-x Photocatalysts: Self-Amplifying H 2 Evolution from Plain Water without Noble Metal Co-Catalyst and Sacrificial Agent. J Am Chem Soc 2023; 145:26122-26132. [PMID: 37984877 DOI: 10.1021/jacs.3c08199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Decoration of semiconductor photocatalysts with cocatalysts is generally done by a step-by-step assembly process. Here, we describe the self-assembling and self-activating nature of a photocatalytic system that forms under illumination of reduced anatase TiO2 nanoparticles in an aqueous Ni2+ solution. UV illumination creates in situ a Ni+/TiO2/Ti3+ photocatalyst that self-activates and, over time, produces H2 at a higher rate. In situ X-ray absorption spectroscopy and electron paramagnetic resonance spectroscopy show that key to self-assembly and self-activation is the light-induced formation of defects in the semiconductor, which enables the formation of monovalent nickel (Ni+) surface states. Metallic nickel states, i.e., Ni0, do not form under the dark (resting state) or under illumination (active state). Once the catalyst is assembled, the Ni+ surface states act as electron relay for electron transfer to form H2 from water, in the absence of sacrificial species or noble metal cocatalysts.
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Affiliation(s)
- Marco Altomare
- PhotoCatalytic Synthesis PCS Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, Enschede 7500 AE, The Netherlands
| | - Shanshan Qin
- Department Materials Science WW-4, LKO, Friedrich-Alexander-University of Erlangen-Nuremberg (FAU), Erlangen 91058, Germany
| | - Viktoriia A Saveleva
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, CS40220, Grenoble Cedex 9 38043, France
| | - Zdenek Badura
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University Olomouc, Křížkovského 511/8, Olomouc 779 00, Czech Republic
- Nanotechnology Centre, VŠB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava-Poruba 708 00, Czech Republic
| | - Ondrej Tomanec
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University Olomouc, Křížkovského 511/8, Olomouc 779 00, Czech Republic
| | - Anca Mazare
- Department Materials Science WW-4, LKO, Friedrich-Alexander-University of Erlangen-Nuremberg (FAU), Erlangen 91058, Germany
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University Olomouc, Křížkovského 511/8, Olomouc 779 00, Czech Republic
- Nanotechnology Centre, VŠB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava-Poruba 708 00, Czech Republic
| | - Alberto Vertova
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, Milan 20133, Italy
| | - Angelo Taglietti
- Dipartimento di Chimica, Università degli Studi di Pavia, Viale Taramelli 13, Pavia 27100, Italy
| | - Alessandro Minguzzi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, Milan 20133, Italy
| | - Paolo Ghigna
- Dipartimento di Chimica, Università degli Studi di Pavia, Viale Taramelli 13, Pavia 27100, Italy
| | - Patrik Schmuki
- Department Materials Science WW-4, LKO, Friedrich-Alexander-University of Erlangen-Nuremberg (FAU), Erlangen 91058, Germany
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University Olomouc, Křížkovského 511/8, Olomouc 779 00, Czech Republic
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Li F, Wan S, Wang D, Schaaf P. Formation of nanoflowers: Au and Ni silicide cores surrounded by SiO x branches. Beilstein J Nanotechnol 2023; 14:133-140. [PMID: 36743299 PMCID: PMC9874233 DOI: 10.3762/bjnano.14.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 01/06/2023] [Indexed: 06/18/2023]
Abstract
This work reports the formation of nanoflowers after annealing of Au/Ni bilayers deposited on SiO2/Si substrates. The cores of the nanoflowers consist of segregated Ni silicide and Au parts and are surrounded by SiO x branches. The SiO2 decomposition is activated at 1050 °C in a reducing atmosphere, and it can be enhanced more by Au compared to Ni. SiO gas from the decomposition of SiO2 and the active oxidation of Si is the source of Si for the growth of the SiO x branches of the nanoflowers. The concentration of SiO gas around the decomposition cavities is inhomogeneously distributed. Closer to the cavity border, the concentration of the Si sources is higher, and SiO x branches grow faster. Hence, nanoflowers present shorter and shorter branches as they are getting away from the border. However, such inhomogeneous SiO gas concentration is weakened in the sample with the highest Au concentration due to the strong ability of Au to enhance SiO2 decomposition, and nanoflowers with less difference in their branches can be observed across the whole sample.
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Affiliation(s)
- Feitao Li
- Chair Materials for Electrical Engineering and Electronics, Institute of Materials Science and Engineering and Institute of Micro- and Nanotechnologies MacroNano, TU Ilmenau, Gustav-Kirchhoff-Straße 5, 98693 Ilmenau, Germany
| | - Siyao Wan
- Chair Materials for Electrical Engineering and Electronics, Institute of Materials Science and Engineering and Institute of Micro- and Nanotechnologies MacroNano, TU Ilmenau, Gustav-Kirchhoff-Straße 5, 98693 Ilmenau, Germany
| | - Dong Wang
- Chair Materials for Electrical Engineering and Electronics, Institute of Materials Science and Engineering and Institute of Micro- and Nanotechnologies MacroNano, TU Ilmenau, Gustav-Kirchhoff-Straße 5, 98693 Ilmenau, Germany
| | - Peter Schaaf
- Chair Materials for Electrical Engineering and Electronics, Institute of Materials Science and Engineering and Institute of Micro- and Nanotechnologies MacroNano, TU Ilmenau, Gustav-Kirchhoff-Straße 5, 98693 Ilmenau, Germany
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Abstract
The functions of interfacial synergy in heterojunction catalysts are diverse and powerful, providing a route to solve many difficulties in energy conversion and organic synthesis. Among heterojunction-based catalysts, the Mott-Schottky catalysts composed of a metal-semiconductor heterojunction with predictable and designable interfacial synergy are rising stars of next-generation catalysts. We review the concept of Mott-Schottky catalysts and discuss their applications in various realms of catalysis. In particular, the design of a Mott-Schottky catalyst provides a feasible strategy to boost energy conversion and chemical synthesis processes, even allowing realization of novel catalytic functions such as enhanced redox activity, Lewis acid-base pairs, and electron donor-acceptor couples for dealing with the current problems in catalysis for energy conversion and storage. This review focuses on the synthesis, assembly, and characterization of Schottky heterojunctions for photocatalysis, electrocatalysis, and organic synthesis. The proposed design principles, including the importance of constructing stable and clean interfaces, tuning work function differences, and preparing exposable interfacial structures for designing electronic interfaces, will provide a reference for the development of all heterojunction-type catalysts, electrodes, energy conversion/storage devices, and even super absorbers, which are currently topics of interest in fields such as electrocatalysis, fuel cells, CO2 reduction, and wastewater treatment.
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Affiliation(s)
- Dong Xu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Shi-Nan Zhang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Jie-Sheng Chen
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Xin-Hao Li
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai200240, P. R. China
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Du P, Min X, Li H, Liu Z, Wu X, Liu Y, Huang Z, Fang M. Hierarchical Fibrous Honeycomb Ceramics with High Load Capability and Low Light‐Off Temperature for the Next‐Generation Auto Emissions Standards. Chemistry 2022; 28:e202104523. [DOI: 10.1002/chem.202104523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Pengpeng Du
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Xin Min
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Hongwei Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Zhenglian Liu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Xiaowen Wu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Yangai Liu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Zhaohui Huang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
| | - Minghao Fang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences (Beijing) Beijing 100083 P. R. China
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Zhang S, Ma H, Sun Y, Liu X, Zhang M, Luo Y, Gao J, Xu J. Selective tandem hydrogenation and rearrangement of furfural to cyclopentanone over CuNi bimetallic catalyst in water. Chinese Journal of Catalysis 2021; 42:2216-24. [DOI: 10.1016/s1872-2067(21)63842-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lin B, Chen H, Zhou Y, Luo X, Tian D, Yan X, Duan R, Di J, Kang L, Zhou A, Yang G, Li Y, Zhou J, Liu Z, Liu F. 2D/2D atomic double-layer WS2/Nb2O5 shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H2 evolution. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.03.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Pinna M, Binda G, Altomare M, Marelli M, Dossi C, Monticelli D, Spanu D, Recchia S. Biochar Nanoparticles over TiO2 Nanotube Arrays: A Green Co-Catalyst to Boost the Photocatalytic Degradation of Organic Pollutants. Catalysts 2021; 11:1048. [DOI: 10.3390/catal11091048] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Biochar nanoparticles (BC NPs), produced by low temperature pyrolysis (350 °C) of microalgae (Nannochloropsis sp.) and nutshells, are proposed as low-cost and sustainable co-catalysts to promote the photocatalytic activity of TiO2 nanotube (NT) arrays towards the degradation of methylene blue (MB) used as an organic pollutant model molecule. BC NPs (size < 25 nm) were obtained by treating bulk BC (i.e., biomass after pyrolysis) by sonication–centrifugation cycles in a water solution. The filtered BC NPs dispersion was deposited by simple drop-casting on the TiO2 NT support. The BC loading was varied by performing multiple depositions. Photocatalytic experiments under UV light (365 nm) revealed that the decoration with BC NPs significantly improves the TiO2 photoactivity. Such enhancement is mainly influenced by the amount of BC deposited; upon optimizing the BC deposition conditions, the rate of photocatalytic degradation of MB increases approximately three times with respect to bare TiO2, almost irrespective of the nature of the raw material. The greater photocatalytic activity of BC-TiO2 can be attributed to the synergistic combination of reactant/product adsorption and catalytic degradation of the adsorbed organic pollutant, as well as an improved charge carrier separation and electron transfer.
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Eid K, Sliem MH, Abdullah AM. Tailoring the defects of sub-100 nm multipodal titanium nitride/oxynitride nanotubes for efficient water splitting performance. Nanoscale Adv 2021; 3:5016-5026. [PMID: 36132349 PMCID: PMC9419868 DOI: 10.1039/d1na00274k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/09/2021] [Indexed: 05/31/2023]
Abstract
Deciphering the photocatalytic-defect relationship of photoanodes can pave the way towards the rational design for high-performance solar energy conversion. Herein, we rationally designed uniform and aligned ultrathin sub-100 nm multipodal titanium nitride/oxynitride nanotubes (TiON x NTs) (x = 2, 4, and 6 h) via the anodic oxidation of Ti-foil in a formamide-based electrolyte followed by annealing under ammonia gas for different durations. XPS, XPS imaging, Auger electron spectra, and positron annihilation spectroscopy disclosed that the high nitridation rate induced the generation of a mixture of Ti-nitride and oxynitride with various vacancy-type defects, including monovacancies, vacancy clusters, and a few voids inside TiO x NTs. These defects decreased the bandgap energy to 2.4 eV, increased visible-light response, and enhanced the incident photon-to-current collection efficiency (IPCE) and the photocurrent density of TiON x NTs by nearly 8 times compared with TiO2NTs, besides a quick carrier diffusion at the nanotube/electrolyte interface. The water-splitting performance of sub-100 nm TiON6NT multipodal nanotubes was superior to the long compacted TiON x NTs with different lengths and TiO2 nanoparticles. Thus, the optimization of the nitridation rate tailors the defect concentration, thereby achieving the highest solar conversion efficiency.
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Affiliation(s)
- Kamel Eid
- Gas Processing Center, College of Engineering, Qatar University P. O. Box 2713 Doha Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University P. O. Box 2713 Doha Qatar
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Abstract
With the rapid development of society, the burden of energy and the environment is becoming more and more serious. Photocatalytic hydrogen production, the photosynthesis of organic fuel, and the photodegradation of pollutants are three effective ways to reduce these burdens using semiconductor photocatalysts. To improve the reaction efficiency of photocatalysts, a small amount of cocatalyst is often added when photocatalysts participate in the synthesis or decomposition reaction. The addition of this small amount of cocatalyst is like a finishing touch, significantly increasing the activity of the photocatalysts. However, in our common study of photocatalysis, we often pay attention to the study of photocatalysts but ignore the study of cocatalysts. Herein, we summarize the recent application research on cocatalysts in the field of photocatalysis, starting from the types, preparation methods, and reaction mechanisms among others, to remind researchers of the matters needing attention when using cocatalysts.
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Affiliation(s)
- Gang Zhao
- Laboratory of Functional Micro-nano Material and Device, School of Physics and Technology, University of Jinan, Jinan, Shandong, P. R. China.
| | - Xijin Xu
- Laboratory of Functional Micro-nano Material and Device, School of Physics and Technology, University of Jinan, Jinan, Shandong, P. R. China.
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Liu YZ, Guo RT, Duan CP, Wu GL, Miao YF, Gu JW, Pan WG. Removal of gaseous pollutants by using 3DOM-based catalysts: A review. Chemosphere 2021; 262:127886. [PMID: 32805659 DOI: 10.1016/j.chemosphere.2020.127886] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Catalytic oxidation is a promising technique to control the emission of gaseous pollutants. Three-dimensionally ordered macroporous (3DOM)-based catalysts have aroused widespread attention because of their high porosity, large surface area and pore volume, superb ability of mass transfer. Therefore, they have been widely used in gaseous pollutants control field, such as soot and methane catalytic combustion, VOCs catalytic oxidation, photocatalytic CO2 reduction and so on. In this review, the recent studies about the preparation and applications of 3DOM catalysts are summarized. At the same time, the advantages and mechanism of the 3DOM catalysts used in gaseous pollutants control are introduced in depth. Finally, the perspective and future direction of 3DOM-based catalysts for gaseous pollutants control are proposed.
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Affiliation(s)
- Yuan-Zhen Liu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China
| | - Rui-Tang Guo
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China.
| | - Chao-Peng Duan
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China
| | - Gui-Lin Wu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China
| | - Yu-Fang Miao
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China
| | - Jing-Wen Gu
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China
| | - Wei-Guo Pan
- School of Energy Source and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China; Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, 200090, PR China.
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Yu L, Peel GK, Cheema FH, Lawrence WS, Bukreyeva N, Jinks CW, Peel JE, Peterson JW, Paessler S, Hourani M, Ren Z. Catching and killing of airborne SARS-CoV-2 to control spread of COVID-19 by a heated air disinfection system. Mater Today Phys 2020; 15:100249. [PMID: 34173438 DOI: 10.1016/j.mtphys.2020.100279] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 06/28/2020] [Indexed: 05/28/2023]
Abstract
Airborne transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) via air-conditioning systems poses a significant threat for the continued escalation of the current coronavirus disease (COVID-19) pandemic. Considering that SARS-CoV-2 cannot tolerate temperatures above 70 °C, here we designed and fabricated efficient filters based on heated nickel (Ni) foam to catch and kill SARS-CoV-2. Virus test results revealed that 99.8% of the aerosolized SARS-CoV-2 was caught and killed by a single pass through a novel Ni-foam-based filter when heated up to 200 °C. In addition, the same filter was also used to catch and kill 99.9% of Bacillus anthracis, an airborne spore. This study paves the way for preventing transmission of SARS-CoV-2 and other highly infectious airborne agents in closed environments.
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Affiliation(s)
- L Yu
- Department of Physics and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX 77204, USA
| | - G K Peel
- Medistar Corporation, 7670 Woodway, Suite 160, Houston, TX 77063, USA
| | - F H Cheema
- Department of Biomedical & Clinical Sciences, University of Houston College of Medicine, Houston, TX 77204, USA
| | - W S Lawrence
- Aerobiology Division, Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - N Bukreyeva
- Preclinical Studies Core, Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - C W Jinks
- Medistar Corporation, 7670 Woodway, Suite 160, Houston, TX 77063, USA
| | - J E Peel
- Aerobiology Division, Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - J W Peterson
- Aerobiology Division, Department of Microbiology & Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - S Paessler
- Preclinical Studies Core, Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX 77550, USA
| | - M Hourani
- Medistar Corporation, 7670 Woodway, Suite 160, Houston, TX 77063, USA
| | - Z Ren
- Department of Physics and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX 77204, USA
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Zhao C, Zhou L, Zhang Z, Gao Z, Weng H, Zhang W, Li L, Song YY. Insight of the Influence of Magnetic-Field Direction on Magneto-Plasmonic Interfaces for Tuning Photocatalytical Performance of Semiconductors. J Phys Chem Lett 2020; 11:9931-9937. [PMID: 33170706 DOI: 10.1021/acs.jpclett.0c02927] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Boosting photocatalytic performance via external fields is an alternative and effective solution for improving the application performance of existing photocatalysts. Herein, using α-Fe2O3-decorated TiO2 nanotube arrays as a model, we demonstrate the influence of magnetic field (MF)-direction on the photogenerated charge-carrier transfer behavior at plasmonic metal/semiconductor interfaces. For the first time, the photocatalytic activity is also found to correlate with the plasmonic metal species while applying an external MF. As verified by first-principles calculations, the spin-orbit coupling of metal contributes to the charge-carrier transfer. To highlight the anisotropic MF-tuning effect in practical applications, the as-prepared architecture is applied for photocatalysis-triggered drug delivery. The delivery rate can be remarkably accelerated by ∼38% under a tiny MF (0.4 T) with the proper direction. The findings in this research may provide new insight into designing semiconductor architectures for boosting the photocatalytical performance in an external MF.
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Affiliation(s)
- Chenxi Zhao
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Liqin Zhou
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhenqian Zhang
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China
| | - Zhida Gao
- College of Sciences, Northeastern University, Shenyang 110004, China
| | - Hongming Weng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Zhang
- College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China
| | - Lingwei Li
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China
| | - Yan-Yan Song
- College of Sciences, Northeastern University, Shenyang 110004, China
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Cao D, Wang Q, Wu Y, Zhu S, Jia Y, Wang R. Solvothermal synthesis and enhanced photocatalytic hydrogen production of Bi/Bi2MoO6 co-sensitized TiO2 nanotube arrays. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117132] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Photocatalysis is an effective technology for preventing the spread of pandemic-scale viruses. This review paper presents an overview of the recent progress in the development of an efficient visible light-sensitive photocatalyst, i.e., a copper oxide nanoclusters grafted titanium dioxide (CuxO/TiO2). The antiviral CuxO/TiO2 photocatalyst is functionalised by a different mechanism in addition to the photocatalytic oxidation process. The CuxO nanocluster consists of the valence states of Cu(I) and Cu(II); herein, the Cu(I) species denaturalizes the protein of the virus, thereby resulting in significant antiviral properties even under dark conditions. Moreover, the Cu(II) species in the CuxO nanocluster serves as an electron acceptor through photo-induced interfacial charge transfer, which leads to the formation of an anti-virus Cu(I) species and holes with strong oxidation power in the valence band of TiO2 under visible-light irradiation. The antiviral function of the CuxO/TiO2 photocatalyst is maintained under indoor conditions, where light illumination is enabled during the day but not during the night; this is because the remaining active Cu(I) species works under dark conditions. The CuxO/TiO2 photocatalyst can thus be used to reduce the risk of virus infection by acting as an antiviral coating material.
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Wawrzyniak J, Karczewski J, Ryl J, Grochowska K, Siuzdak K. Laser-Assisted Synthesis and Oxygen Generation of Nickel Nanoparticles. Materials (Basel) 2020; 13:E4068. [PMID: 32933218 PMCID: PMC7560387 DOI: 10.3390/ma13184068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/09/2020] [Accepted: 09/11/2020] [Indexed: 11/16/2022]
Abstract
Nowadays, more than ever, environmental awareness is being taken into account when it comes to the design of novel materials. Herein, the pathway to the creation of a colloid of spherical, almost purely metallic nickel nanoparticles (NPs) through pulsed laser ablation in ethanol is presented. A complex description of the colloid is provided through UV-vis spectroscopy and dynamic light scattering analysis, ensuring insight into laser-induced nanoparticle homogenization and size-control of the NPs. The transmission electron spectroscopy revealed spherical nanoparticles with a narrow size distribution, whereas the energy-dispersive X-ray spectroscopy accompanied by the X-ray photoelectron spectroscopy revealed their metallic nature. Furthermore, an example of the application of the colloidal nanoparticles is presented, where a quick, five-min ultrasound modification results in over an order of magnitude higher current densities in the titania-based electrode for the oxygen evolution reaction.
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Affiliation(s)
- Jakub Wawrzyniak
- Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14 st., 80-231 Gdańsk, Poland; (K.G.); (K.S.)
| | - Jakub Karczewski
- Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gabriela Narutowicza 11/12 st., 80-233 Gdańsk, Poland;
| | - Jacek Ryl
- Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 st., 80-233 Gdańsk, Poland;
| | - Katarzyna Grochowska
- Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14 st., 80-231 Gdańsk, Poland; (K.G.); (K.S.)
| | - Katarzyna Siuzdak
- Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Fiszera 14 st., 80-231 Gdańsk, Poland; (K.G.); (K.S.)
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Shahvaranfard F, Ghigna P, Minguzzi A, Wierzbicka E, Schmuki P, Altomare M. Dewetting of PtCu Nanoalloys on TiO 2 Nanocavities Provides a Synergistic Photocatalytic Enhancement for Efficient H 2 Evolution. ACS Appl Mater Interfaces 2020; 12:38211-38221. [PMID: 32706239 DOI: 10.1021/acsami.0c10968] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We investigate the co-catalytic activity of PtCu alloy nanoparticles for photocatalytic H2 evolution from methanol-water solutions. To produce the photocatalysts, a few-nanometer-thick Pt-Cu bilayers are deposited on anodic TiO2 nanocavity arrays and converted by solid-state dewetting via a suitable thermal treatment into bimetallic PtCu nanoparticles. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results prove the formation of PtCu nanoalloys that carry a shell of surface oxides. X-ray absorption near-edge structure (XANES) data support Pt and Cu alloying and indicate the presence of lattice disorder in the PtCu nanoparticles. The PtCu co-catalyst on TiO2 shows a synergistic activity enhancement and a significantly higher activity toward photocatalytic H2 evolution than Pt- or Cu-TiO2. We propose the enhanced activity to be due to Pt-Cu electronic interactions, where Cu increases the electron density on Pt, favoring a more efficient electron transfer for H2 evolution. In addition, Cu can further promote the photoactivity by providing additional surface catalytic sites for hydrogen recombination. Remarkably, when increasing the methanol concentration up to 50 vol % in the reaction phase, we observe for PtCu-TiO2 a steeper activity increase compared to Pt-TiO2. A further increase in methanol concentration (up to 80 vol %) causes for Pt-TiO2 a clear activity decay, while PtCu-TiO2 still maintains a high level of activity. This suggests improved robustness of PtCu nanoalloys against poisoning from methanol oxidation products such as CO.
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Affiliation(s)
- Fahimeh Shahvaranfard
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| | - Paolo Ghigna
- Dipartimento di Chimica, Università degli Studi di Pavia, Viale Taramelli 13, 27100 Pavia, Italy
| | - Alessandro Minguzzi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milan, Italy
| | - Ewa Wierzbicka
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| | - Patrik Schmuki
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, 80203 Jeddah, Kingdom of Saudi Arabia
| | - Marco Altomare
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
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18
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Kong D, Yin D, Zhang D, Yuan F, Song B, Yao S, Yin J, Geng Y, Pu X. Noble metal-free 0D-1D NiCoP/Mn 0.3Cd 0.7S nanocomposites for highly efficient photocatalytic H 2 evolution under visible-light irradiation. Nanotechnology 2020; 31:305701. [PMID: 32272459 DOI: 10.1088/1361-6528/ab8850] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Efficient and noble metal-free co-catalyst loading is an effective solution for separating and transferring photo-generated carriers and lowering the overpotential in photocatalytic H2 evolution activity. In this work, we designed and prepared a series of novel NiCoP/Mn0.3Cd0.7S (NCP/MCS) composites by modifying MCS nanorods with the co-catalyst NCP using a simple calcination method. Notably, the 10-NCP/MCS composite displays the optimum photocatalytic H2 evolution rate of 118.5 mmol g-1 h-1 under visible-light irradiation. This is approximately 3.39 times higher than that of pure MCS. The corresponding apparent quantum efficiency is 10.2% at 420 nm. The superior photocatalytic activity of the NCP/MCS composites can be attributed to the efficient separation of photogenerated carriers caused by the intimate heterojunction interface between NCP and MCS, smaller transfer resistance, and lower overpotential of NCP. Moreover, the NCP/MCS composites exhibit remarkable photostability. A plausible mechanism is proposed.
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Affiliation(s)
- Dezhi Kong
- School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, People's Republic of China
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19
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Spanu D, Minguzzi A, Recchia S, Shahvardanfard F, Tomanec O, Zboril R, Schmuki P, Ghigna P, Altomare M. An Operando X-ray Absorption Spectroscopy Study of a NiCu−TiO2 Photocatalyst for H2 Evolution. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01373] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Davide Spanu
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100 Como, Italy
| | - Alessandro Minguzzi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milan, Italy
| | - Sandro Recchia
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, 22100 Como, Italy
| | - Fahimeh Shahvardanfard
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Patrik Schmuki
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
- Chemistry Department, Faculty of Science, King Abdulaziz University, 80203 Jeddah, Saudi Arabia Kingdom
| | - Paolo Ghigna
- Dipartimento di Chimica, Università degli Studi di Pavia, Viale Taramelli 13, 27100 Pavia, Italy
| | - Marco Altomare
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
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20
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Ji L, Spanu D, Denisov N, Recchia S, Schmuki P, Altomare M. A Dewetted-Dealloyed Nanoporous Pt Co-Catalyst Formed on TiO 2 Nanotube Arrays Leads to Strongly Enhanced Photocatalytic H 2 Production. Chem Asian J 2020; 15:301-309. [PMID: 31793241 PMCID: PMC7004064 DOI: 10.1002/asia.201901545] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/01/2019] [Indexed: 11/25/2022]
Abstract
Pt nanoparticles are typically decorated as co-catalyst on semiconductors to enhance the photocatalytic performance. Due to the low abundance and high cost of Pt, reaching a high activity with minimized co-catalyst loadings is a key challenge in the field. We explore a dewetting-dealloying strategy to fabricate on TiO2 nanotubes nanoporous Pt nanoparticles, aiming at improving the co-catalyst mass activity for H2 generation. For this, we sputter first Pt-Ni bi-layers of controllable thickness (nm range) on highly ordered TiO2 nanotube arrays, and then induce dewetting-alloying of the Pt-Ni bi-layers by a suitable annealing step in a reducing atmosphere: the thermal treatment causes the Pt and Ni films to agglomerate and at the same time mix with each other, forming on the TiO2 nanotube surface metal islands of a mixed PtNi composition. In a subsequent step we perform chemical dealloying of Ni that is selectively etched out from the bimetallic dewetted islands, leaving behind nanoporous Pt decorations. Under optimized conditions, the nanoporous Pt-decorated TiO2 structures show a>6 times higher photocatalytic H2 generation activity compared to structures modified with a comparable loading of dewetted, non-porous Pt. We ascribe this beneficial effect to the nanoporous nature of the dealloyed Pt co-catalyst, which provides an increased surface-to-volume ratio and thus a more efficient electron transfer and a higher density of active sites at the co-catalyst surface for H2 evolution.
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Affiliation(s)
- Lei Ji
- Department of Materials Science WW4-LKOUniversity of Erlangen-NurembergMartensstrasse 7Erlangen91058Germany
- College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityProvincial Key Laboratory of Oil and Gas Chemical TechnologyDaqing163318China
| | - Davide Spanu
- Department of Materials Science WW4-LKOUniversity of Erlangen-NurembergMartensstrasse 7Erlangen91058Germany
- Department of Science and High TechnologyUniversity of InsubriaVia Valleggio 1122100ComoItaly
| | - Nikita Denisov
- Department of Materials Science WW4-LKOUniversity of Erlangen-NurembergMartensstrasse 7Erlangen91058Germany
| | - Sandro Recchia
- Department of Science and High TechnologyUniversity of InsubriaVia Valleggio 1122100ComoItaly
| | - Patrik Schmuki
- Department of Materials Science WW4-LKOUniversity of Erlangen-NurembergMartensstrasse 7Erlangen91058Germany
- Department of ChemistryFaculty of ScienceKing Abdulaziz UniversityP.O. Box 80203Jeddah21569Saudi Arabia
| | - Marco Altomare
- Department of Materials Science WW4-LKOUniversity of Erlangen-NurembergMartensstrasse 7Erlangen91058Germany
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21
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Kavitha R, Kumar SG. Review on bimetallic-deposited TiO2: preparation methods, charge carrier transfer pathways and photocatalytic applications. Chem Pap 2020; 74:717-56. [DOI: 10.1007/s11696-019-00995-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Peng L, Liu Y, Li Y, Teng F, Tang A, Yin Y. Fluorine-assisted structural engineering of colloidal anatase TiO 2 hierarchical nanocrystals for enhanced photocatalytic hydrogen production. Nanoscale 2019; 11:22575-22584. [PMID: 31746903 DOI: 10.1039/c9nr06595d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Anatase TiO2 materials are well-known for their photocatalytic properties and their structure-performance relationship has been intensively studied over the past few decades. In this study, we report a versatile strategy to control the geometric and electronic structure of hierarchical anatase TiO2 nanocrystals via a colloidal synthesis technique in order to optimize their photocatalytic performances. The synthesis is modified from a classical nonaqueous sol-gel approach in which titanium alkoxides and long carbon chain carboxylic acids are used as titanium sources and hydrolysis/capping agents, respectively. By introducing fluoride ions into the reaction as competitive capping agents and controlling other parameters, the geometric structure of TiO2 nanocrystals can be regulated from nanorods and nanobipyramids to their hierarchical assembly structures with controlled dimension and crystallinity. Meanwhile, it is confirmed that the fluoride capping agents also affect the surface structure of TiO2 by fluorine doping, which exerts an additional impact on the electronic structure of TiO2 nanocrystals apart from morphology variation. Further investigation of photocatalytic hydrogen production performances of TiO2 nanocrystals with different structures indicates that the catalytic efficiency is highly dependent on structural factors including hierarchical shape, surface area and doping status. Obvious improvement of photocatalytic performance is observed in the optimized hierarchical TiO2 nanocrystals (2033.6 μmol g-1 h-1) compared to that in commonly prepared TiO2 nanobipyramids (1135.5 μmol g-1 h-1) and other hierarchical TiO2 nanocrystals (1331.9 μmol g-1 h-1 or lower), which demonstrates the effectiveness of material optimization by the strategy developed in this study.
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Affiliation(s)
- Lan Peng
- Key Laboratory of Luminescence and Optical Information (Ministry of Education), School of Science, Beijing JiaoTong University, Beijing 100044, China.
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23
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Lim SY, Law CS, Liu L, Markovic M, Hedrich C, Blick RH, Abell AD, Zierold R, Santos A. Electrochemical Engineering of Nanoporous Materials for Photocatalysis: Fundamentals, Advances, and Perspectives. Catalysts 2019; 9:988. [DOI: 10.3390/catal9120988] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Photocatalysis comprises a variety of light-driven processes in which solar energy is converted into green chemical energy to drive reactions such as water splitting for hydrogen energy generation, degradation of environmental pollutants, CO2 reduction and NH3 production. Electrochemically engineered nanoporous materials are attractive photocatalyst platforms for a plethora of applications due to their large effective surface area, highly controllable and tuneable light-harvesting capabilities, efficient charge carrier separation and enhanced diffusion of reactive species. Such tailor-made nanoporous substrates with rational chemical and structural designs provide new exciting opportunities to develop advanced optical semiconductor structures capable of performing precise and versatile control over light–matter interactions to harness electromagnetic waves with unprecedented high efficiency and selectivity for photocatalysis. This review introduces fundamental developments and recent advances of electrochemically engineered nanoporous materials and their application as platforms for photocatalysis, with a final prospective outlook about this dynamic field.
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Cheng D, Li Y, Yang L, Luo S, Yang L, Luo X, Luo Y, Li T, Gao J, Dionysiou DD. One-step reductive synthesis of Ti 3+ self-doped elongated anatase TiO 2 nanowires combined with reduced graphene oxide for adsorbing and degrading waste engine oil. J Hazard Mater 2019; 378:120752. [PMID: 31229881 DOI: 10.1016/j.jhazmat.2019.120752] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/13/2019] [Accepted: 06/07/2019] [Indexed: 05/27/2023]
Abstract
A sustainable photocatalyst of Ti3+ self-doped elongated anatase nanowires combined with reduced graphene oxide (TiO2 NWs@rGO) was prepared via a facile one-step reductive synthesis process using NaBH4 as reductant for the first time. The obtained optimal TiO2 NWs@rGO composite has a large surface area,182 m2 g-1, which demonstrates strong adsorption capacity due to the multilayered structure built by highly crystallized nanowires of TiO2 and ultrathin rGO layers. When the photocatalyst was applied in removing waste engine oil (100 mL, 50 mg L-1), it exhibited outstanding performance with up to COD 98.6% removal extent (from 145 initial to 2 mg L-1 final COD) after 5 h, which is 34.1% higher than that of TiO2 NWs (64.5% COD removal extent). Gas chromatography-mass spectrometry analyses of residual waste engine oil after photocatalysis shows significant reductions of C6-C19 chemicals as well as total disappear of C15,C16, C17, C18 chemicals. The outstanding photocatalytic activity of TiO2 NWs@rGO benefits from sensitive response to visible light, improved surface reactivity and high electron flux enabled by rGO and Ti3+ in TiO2. In addition, this composite catalyst can be self-cleaned, and recycled for reuse, which suggests promising potential for waste engine oil treatment.
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Affiliation(s)
- Dandan Cheng
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Yaobang Li
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Lixia Yang
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China.
| | - Shenglian Luo
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China.
| | - Liming Yang
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Xubiao Luo
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Yan Luo
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Tingting Li
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang, 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Jiong Gao
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DChEE), 705 Engineering Research Center, University of Cincinnati, Cincinnati, OH, USA
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DChEE), 705 Engineering Research Center, University of Cincinnati, Cincinnati, OH, USA
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Wu X, Wang C, Wei Y, Xiong J, Zhao Y, Zhao Z, Liu J, Li J. Multifunctional photocatalysts of Pt-decorated 3DOM perovskite-type SrTiO3 with enhanced CO2 adsorption and photoelectron enrichment for selective CO2 reduction with H2O to CH4. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.037] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Abstract
Subwavelength metal nanoislands thermally dewetted from a thin film emerge as a powerful and cost-effective photonic material, due to the formation of substantially strong nano-gap-based plasmonic hot spots and their simple large-area nanofabrication. Unlike conventional nanostructures, nanoislands dewetted from thin metal films can be formed on a large scale at the wafer level and show substrate-dependent plasmonic phenomena across a broad spectral range from ultraviolet to infrared. Substrate-selective dewetting methods for metal nanoislands enable diverse nanophotonic and optoelectronic technologies, underlining mechanical, structural, and material properties of a substrate. Emerging bioplasmonic technology using metal nanoislands also serves as a high-throughput and surface-sensitive analytical technique with wide-ranging application in rapid, real-time, and point-of-care medical diagnostics. This review introduces an assortment of dewetting fabrication methods for metal nanoislands on distinct substrates from glass to cellulose fibers and provides novel findings for metal nanoislands on a substrate by three-dimensional numerical modeling. Furthermore, the plasmonic properties of metal nanoislands and recent examples for their photonic applications, in particular, biological sensing, are technically summarized and discussed.
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Affiliation(s)
- Taerin Chung
- Department of Bio and Brain Engineering, KAIST Institute for Health Science and Technology (KIHST), Korea Advanced Institute of Science and Technology (KAIST), 291 Dahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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27
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Wang P, Xu S, Chen F, Yu H. Ni nanoparticles as electron-transfer mediators and NiS as interfacial active sites for coordinative enhancement of H2-evolution performance of TiO2. Chinese Journal of Catalysis 2019. [DOI: 10.1016/s1872-2067(18)63157-2] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Li T, Wang J, Wang F, Zhang L, Jiang Y, Arandiyan H, Li H. The Effect of Surface Wettability and Coalescence Dynamics in Catalytic Performance and Catalyst Preparation: A Review. ChemCatChem 2019. [DOI: 10.1002/cctc.201801925] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tao Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University Jinan 250061 P. R. China
| | - Junjun Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University Jinan 250061 P. R. China
| | - Fenglong Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University Jinan 250061 P. R. China
| | - Lishu Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University Jinan 250061 P. R. China
| | - Yanyan Jiang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University Jinan 250061 P. R. China
| | - Hamidreza Arandiyan
- Laboratory of Advanced Catalysis for Sustainability, School of ChemistryThe University of Sydney Sydney 2006 Australia
| | - Hui Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong University Jinan 250061 P. R. China
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29
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Naldoni A, Altomare M, Zoppellaro G, Liu N, Kment Š, Zbořil R, Schmuki P. Photocatalysis with Reduced TiO 2: From Black TiO 2 to Cocatalyst-Free Hydrogen Production. ACS Catal 2019; 9:345-364. [PMID: 30701123 PMCID: PMC6344061 DOI: 10.1021/acscatal.8b04068] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/26/2018] [Indexed: 12/22/2022]
Abstract
Black TiO2 nanomaterials have recently emerged as promising candidates for solar-driven photocatalytic hydrogen production. Despite the great efforts to synthesize highly reduced TiO2, it is apparent that intermediate degree of reduction (namely, gray titania) brings about the formation of peculiar defective catalytic sites enabling cocatalyst-free hydrogen generation. A precise understanding of the structural and electronic nature of these catalytically active sites is still elusive, as well as the fundamental structure-activity relationships that govern formation of crystal defects, increased light absorption, charge separation, and photocatalytic activity. In this Review, we discuss the basic concepts that underlie an effective design of reduced TiO2 photocatalysts for hydrogen production such as (i) defects formation in reduced TiO2, (ii) analysis of structure deformation and presence of unpaired electrons through electron paramagnetic resonance spectroscopy, (iii) insights from surface science on electronic singularities due to defects, and (iv) the key differences between black and gray titania, that is, photocatalysts that require Pt-modification and cocatalyst-free photocatalytic hydrogen generation. Finally, future directions to improve the performance of reduced TiO2 photocatalysts are outlined.
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Affiliation(s)
- Alberto Naldoni
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 78371 Olomouc, Czech Republic
| | - Marco Altomare
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 78371 Olomouc, Czech Republic
| | - Ning Liu
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
| | - Štěpán Kment
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 78371 Olomouc, Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 78371 Olomouc, Czech Republic
| | - Patrik Schmuki
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 78371 Olomouc, Czech Republic
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
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30
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Zhang L, Zhu X, Zhao Y, Zhang P, Chen J, Jiang J, Xie T. The photogenerated charge characteristics in Ni@NiO/CdS hybrids for increased photocatalytic H2 generation. RSC Adv 2019; 9:39604-39610. [PMID: 35541411 PMCID: PMC9076113 DOI: 10.1039/c9ra06034k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 11/04/2019] [Indexed: 11/21/2022] Open
Abstract
Solar-driven H2 generation from water splitting with semiconductor materials is considered an effective solution to solve the problems of energy shortage and environmental pollution at a low cost. In this study, a highly efficient photocatalyst Ni@NiO/CdS for H2 evolution was synthesised using a simple solvothermal method and calcination. The HRTEM results and elemental mapping tests confirmed that Ni@NiO was successfully loaded on the surface of CdS. For Ni@NiO loaded, Ni@NiO/CdS exhibited remarkable photocatalytic H2 evolution activity of 87.6 μmol h−1, which was about 104 times higher than that of pure CdS. The enhanced H2 evolution activity of Ni@NiO/CdS was ascribed to the prolonged lifetime of the photogenerated charges and the reduced surface overpotential for H2 evolution. NiO reduces the H2 evolution overpotential, which is the main reason for the improvement in the photocatalytic H2 evolution activity of Ni/CdS.![]()
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Affiliation(s)
- Lijing Zhang
- College of Chemical Engineering
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
- Huaiyin Institute of Technology
- Huaian 223003
| | - Xiufang Zhu
- College of Chemical Engineering
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
- Huaiyin Institute of Technology
- Huaian 223003
| | - Yuanyuan Zhao
- College of Chemical Engineering
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
- Huaiyin Institute of Technology
- Huaian 223003
| | - Pengyu Zhang
- College of Chemical Engineering
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
- Huaiyin Institute of Technology
- Huaian 223003
| | - Jing Chen
- College of Chemical Engineering
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
- Huaiyin Institute of Technology
- Huaian 223003
| | - Jinlong Jiang
- College of Chemical Engineering
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province
- Huaiyin Institute of Technology
- Huaian 223003
| | - Tengfeng Xie
- State Key Laboratory of Theoretical and Computational Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
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Spanu D, Bestetti A, Hildebrand H, Schmuki P, Altomare M, Recchia S. Photocatalytic reduction and scavenging of Hg(ii) over templated-dewetted Au on TiO 2 nanotubes. Photochem Photobiol Sci 2019; 18:1046-1055. [PMID: 30534751 DOI: 10.1039/c8pp00424b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold-decorated TiO2 nanotubes were used for the photocatalytic abatement of Hg(ii) in aqueous solutions. The presence of dewetted Au nanoparticles induces a strong enhancement of photocatalytic reduction and scavenging performances, with respect to naked TiO2. In the presence of chlorides, a massive formation of Hg2Cl2 nanowires, produced from Au nanoparticles, was observed using highly Au loaded photocatalysts to treat a 10 ppm Hg(ii) solution. EDS and XPS confirmed the nature of the photo-produced nanowires. In the absence of chlorides and/or at lower Hg(ii) starting concentrations, the scavenging of mercury proceeds through the formation of Hg-Au amalgams. Solar light driven Hg(ii) abatements up to 90% were observed after 24 h. ICP-MS analysis revealed that the removed Hg(ii) is accumulated on the photocatalyst surface. Regeneration of Hg-loaded exhaust photocatalysts was easily performed by anodic stripping of Hg(0) and Hg(i) to Hg(ii). After four catalytic-regeneration cycles, only a 10% decrease of activity was observed.
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Affiliation(s)
- Davide Spanu
- Department of Science and High Technology, University of Insubria, via Valleggio 11, 22100 Como, Italy.
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