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Liu X, Risbakk S, Almeida Carvalho P, Yang M, Hoff Backe P, Bjørås M, Norby T, Chatzitakis A. Immobilization of FeFe-hydrogenase on black TiO2 nanotubes as biocathodes for the hydrogen evolution reaction. Electrochem commun 2022. [DOI: 10.1016/j.elecom.2022.107221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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2
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Touni A, Liu X, Kang X, Carvalho PA, Diplas S, Both KG, Sotiropoulos S, Chatzitakis A. Galvanic Deposition of Pt Nanoparticles on Black TiO 2 Nanotubes for Hydrogen Evolving Cathodes. CHEMSUSCHEM 2021; 14:4993-5003. [PMID: 34478230 PMCID: PMC9291612 DOI: 10.1002/cssc.202101559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/23/2021] [Indexed: 05/06/2023]
Abstract
A galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high-aspect-ratio black TiO2 -nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High-resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm-2 range) achieved low Tafel slopes (30-34 mV dec-1 ) and high stability in acidic conditions. This study provides important insights for the in-situ formation and deposition of NPs in high-aspect-ratio structures for energy applications.
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Affiliation(s)
- Aikaterini Touni
- Department of ChemistryAristotle University of Thessaloniki54124ThessalonikiGreece
| | - Xin Liu
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | - Xiaolan Kang
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Spyros Diplas
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
- SINTEF IndustryPOB 124 Blindern0314OsloNorway
| | - Kevin G. Both
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Athanasios Chatzitakis
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
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3
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Visible Light Driven Photocatalytic Decolorization and Disinfection of Water Employing Reduced TiO2 Nanopowders. Catalysts 2021. [DOI: 10.3390/catal11020228] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Defect-engineering of TiO2 can have a major impact on its photocatalytic properties for the degradation of persisting and non-biodegradable pollutants. Herein, a series of intrinsic and extrinsic defects are induced by post annealing of crystalline TiO2 under different reducing atmospheres. A detailed optoelectronic characterization sheds light on the key characteristics of the defect-engineered TiO2 nanopowders that are linked to the photocatalytic performance of the prepared photocatalysts. The photodegradation of a model dye, malachite green, as well as the inactivation of bacterial endospores of the Geobacillus stearothermophilus species were studied in the presence of the developed catalysts under visible light illumination. Our results indicate that a combination of certain defects is necessary for the improvement of the photocatalytic process for water purification and disinfection under visible light.
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Gurgul M, Gawlak K, Syrek K, Kozieł M, Sulka GD, Zaraska L. The influence of water-induced crystallization on the photoelectrochemical properties of porous anodic tin oxide films. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.07.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li H, Song W, Cui X, Li Y, Hou B, Zhang X, Wang Y, Cheng L, Zhang P, Li J. AgInS 2 and graphene co-sensitized TiO 2 photoanodes for photocathodic protection of Q235 carbon steel under visible light. NANOTECHNOLOGY 2020; 31:305704. [PMID: 32240986 DOI: 10.1088/1361-6528/ab85eb] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
AgInS2 nanoparticle and graphene nanosheet co-sensitized anatase TiO2 nanotube array films were fabricated by a combination of hydrothermal reaction and electrochemical anodization on titanium sheets. The results showed that the co-sensitization of AgInS2 nanoparticles and graphene nanosheets extended the photoresponse of TiO2 nanotubes into the visible-light region, and improved the photogenerated charge separation and transfer capability. The photocurrent density of the AgInS2/graphene/TiO2 composites (about 4.0 mA cm-2) was 20 times that of bare TiO2 (only 0.2 mA cm-2) under visible-light illumination. The potential negative shift value of AgInS2/graphene/TiO2 composites was up to 0.68 V versus saturated calomel electrode. The AgInS2/graphene/TiO2 composites can provide Q235 carbon steel with highly efficient photocathodic protection under visible-light illumination.
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Affiliation(s)
- Hong Li
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, People's Republic of China
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Xu K, Liu Z, Qi S, Yin Z, Deng S, Zhang M, Sun Z. Construction of Ag-modified TiO2/ZnO heterojunction nanotree arrays with superior photocatalytic and photoelectrochemical properties. RSC Adv 2020; 10:34702-34711. [PMID: 35514379 PMCID: PMC9056850 DOI: 10.1039/d0ra06596j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/10/2020] [Indexed: 11/21/2022] Open
Abstract
The work involves the preparation of TiO2/ZnO heterojunction nanotree arrays by a three-step: hydrothermal, sol–gel, and secondary hydrothermal method, and then modification of Ag quantum dots (QDs).
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Affiliation(s)
- Kang Xu
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
| | - Zhu Liu
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
| | - Shihan Qi
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
| | - Zhuangzhuang Yin
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
| | - Shangkun Deng
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
| | - Miao Zhang
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
| | - Zhaoqi Sun
- School of Physics & Materials Science
- Anhui University
- Hefei 230601
- PR China
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Wang X, Wang LL, Guo D, Ma LL, Zhu BL, Wang P, Wang GC, Zhang SM, Huang WP. Fabrication and photocatalytic performance of C, N, F-tridoped TiO2 nanotubes. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.05.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Xu K, Chatzitakis A, Jensen IJT, Grandcolas M, Norby T. Ta 3N 5/Co(OH) x composites as photocatalysts for photoelectrochemical water splitting. Photochem Photobiol Sci 2019; 18:837-844. [PMID: 30411099 DOI: 10.1039/c8pp00312b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ta3N5 nanotubes (NTs) were obtained from nitridation of Ta2O5 NTs, which were grown directly on Ta foil through a 2-step anodization procedure. With Co(OH)x decoration, a photocurrent density as high as 2.3 mA cm-2 (1.23 V vs. NHE) was reached under AM1.5G simulated solar light; however, the electrode suffered from photocorrosion. More stable photoelectrochemical (PEC) performance was achieved by first loading Co(OH)x, followed by loading cobalt phosphate (Co-Pi) as double co-catalysts. The Co(OH)x/Co-Pi double co-catalysts may act as a hole storage layer that slows down the photocorrosion caused by the accumulated holes on the surface of the electrode. A "waggling" appearance close to the "mouth" of Ta2O5 NTs was observed, and may indicate structural instability of the "mouth" region, which breaks into segments after nitridation and forms a top layer of broken Ta3N5 NTs. A unique mesoporous structure of the walls of the Ta3N5 NTs, which is reported here the first time, is also a result of the nitridation process. We believe that the mesoporous structure makes it difficult for the nanotubes to be fully covered by the co-catalyst layer, hence rationalizing the remaining degradation by photocorrosion.
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Affiliation(s)
- Kaiqi Xu
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, FERMiO, Gaustadalléen 21, NO-0349 Oslo, Norway.
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Chatzitakis A, Sartori S. Recent Advances in the Use of Black TiO 2 for Production of Hydrogen and Other Solar Fuels. Chemphyschem 2019; 20:1272-1281. [PMID: 30633840 DOI: 10.1002/cphc.201801094] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/11/2019] [Indexed: 12/20/2022]
Abstract
Black TiO2 has emerged as one of the most promising photocatalysts recently discovered. The reason behind its catalytic activity is considered to be due to the presence of defects and Ti3+ species at the surface of black TiO2 nanostructures, which are crucial for its diverse applications. Moreover, disordered/crystalline surface layers and bulk regions have been identified and appear to influence the intrinsic properties of the material. Here, we present the latest studies on the use of black TiO2 for metal free hydrogen production, as well as for CO2 photoreduction and N2 photofixation. After highlighting the structure/property relations, we conclude with some critical questions and suggest further topics of research in order to better understand the underlying mechanisms of light absorption in black TiO2 , especially towards solar fuels production.
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Affiliation(s)
- Athanasios Chatzitakis
- Department of Chemistry, University of Oslo, Centre for Materials Science and Nanotechnology, FERMiO, Gaustadalléen 21, NO-0349, Oslo, Norway
| | - Sabrina Sartori
- Associate Professor S. Sartori, Department of Technology Systems, University of Oslo, NO-2027, Kjeller, Norway
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Carrizo R, Ramírez D, Hernández L, Lobos G, Häberle P, Dalchiele EA, Riveros G. Electrodeposition and Characterization of a Tin Sulfide‐Electrochemically Reduced Graphene Oxide Heterojunction. ChemElectroChem 2019. [DOI: 10.1002/celc.201801654] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rolando Carrizo
- Instituto de Química y Bioquímica, Facultad de CienciasUniversidad de Valparaíso Avenida Gran Bretaña 1111, Playa Ancha Valparaíso Chile
| | - Daniel Ramírez
- Instituto de Química y Bioquímica, Facultad de CienciasUniversidad de Valparaíso Avenida Gran Bretaña 1111, Playa Ancha Valparaíso Chile
| | - Loreto Hernández
- Instituto de Química y Bioquímica, Facultad de CienciasUniversidad de Valparaíso Avenida Gran Bretaña 1111, Playa Ancha Valparaíso Chile
| | - Gabriela Lobos
- Instituto de Química y Bioquímica, Facultad de CienciasUniversidad de Valparaíso Avenida Gran Bretaña 1111, Playa Ancha Valparaíso Chile
| | - Patricio Häberle
- Departamento de FísicaUniversidad Técnica Federico Santa María Avenida España 1680 Valparaíso 2390123 Chile
| | - Enrique A. Dalchiele
- Instituto de Física, Facultad de IngenieríaUniversidad de la República Julio Herrera y Reissig 565, C.C. 30 11000 Montevideo Uruguay
| | - Gonzalo Riveros
- Instituto de Química y Bioquímica, Facultad de CienciasUniversidad de Valparaíso Avenida Gran Bretaña 1111, Playa Ancha Valparaíso Chile
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Momeni MM, Mahvari M, Ghayeb Y. Photoelectrochemical properties of iron-cobalt WTiO2 nanotube photoanodes for water splitting and photocathodic protection of stainless steel. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.10.035] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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12
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Wang JC, Lou HH, Xu ZH, Cui CX, Li ZJ, Jiang K, Zhang YP, Qu LB, Shi W. Natural sunlight driven highly efficient photocatalysis for simultaneous degradation of rhodamine B and methyl orange using I/C codoped TiO 2 photocatalyst. JOURNAL OF HAZARDOUS MATERIALS 2018; 360:356-363. [PMID: 30130694 DOI: 10.1016/j.jhazmat.2018.08.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/20/2018] [Accepted: 08/04/2018] [Indexed: 05/25/2023]
Abstract
Increasing the efficiency of dye degradation is a critical issue for the application for photocatalysis. It is one of the greatest challenges to enhance the utilization of photo generated carriers in semiconductor, especially for sunlight irradiation. In this study, I/C-codoped TiO2 was synthesized by a simple solvothermal-calcination method. The codoping interstitial carbon and substitutional iodine not only widened the light absorption range of the TiO2 photocatalysts, but also enhanced the separation of photo-induced carriers. The photocatalytic activities of RhB and MO degradation over the 4-I/C-TiO2 photocatalyst could reach 98.2% and 94.2% after 25 min visible light irradiation (λ ≥ 400 nm), respectively. Notably, 4-I/C-TiO2 showed good activity for MO and RhB mixed degradation and could also accomplish the photocatalytic degradation in the above mixed system under natural sunlight irradiation. According to the dark catalytic experiment, I/C-codoping could effectively accelerate the formation of hydroxyl radicals from the generated H2O2, which was formed for the enhanced photocatalytic activity of dye degradation. The gained knowledge may provide some insights into the photocatalytic degradation over the codoped TiO2 catalyst.
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Affiliation(s)
- Ji-Chao Wang
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China; Post-doctoral Station of Environmental Science and Engineering, Henan Normal University, Xinxiang 453000, China.
| | - Hui-Hui Lou
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China
| | - Zhi-Hua Xu
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China
| | - Cheng-Xing Cui
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China
| | - Zhong-Jun Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450000, China
| | - Kai Jiang
- Post-doctoral Station of Environmental Science and Engineering, Henan Normal University, Xinxiang 453000, China
| | - Yu-Ping Zhang
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China.
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450000, China
| | - Weina Shi
- College of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, China.
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Li X, Xie Q, Tian Z. A DFT study of electronic structures and optical properties of nickel, nitrogen doped rutile TiO2. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.08.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Cheng W, Singh N, Elliott W, Lee J, Rassoolkhani A, Jin X, McFarland EW, Mubeen S. Earth-Abundant Tin Sulfide-Based Photocathodes for Solar Hydrogen Production. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700362. [PMID: 29375966 PMCID: PMC5770675 DOI: 10.1002/advs.201700362] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/30/2017] [Indexed: 06/07/2023]
Abstract
Tin-based chalcogenide semiconductors, though attractive materials for photovoltaics, have to date exhibited poor performance and stability for photoelectrochemical applications. Here, a novel strategy is reported to improve performance and stability of tin monosulfide (SnS) nanoplatelet thin films for H2 production in acidic media without any use of sacrificial reagent. P-type SnS nanoplatelet films are coated with the n-CdS buffer layer and the TiO2 passivation layer to form type II heterojunction photocathodes. These photocathodes with subsequent deposition of Pt nanoparticles generate a photovoltage of 300 mV and a photocurrent density of 2.4 mA cm-2 at 0 V versus reversible hydrogen electrode (RHE) for water splitting under simulated visible-light illumination (λ > 500 nm, Pin = 80 mW cm-2). The incident photon-to-current efficiency at 0 V versus RHE for H2 production reach a maximum of 12.7% at 575 nm with internal quantum efficiency of 13.8%. The faradaic efficiency for hydrogen evolution remains close to unity after 6000 s of illumination, confirming the robustness of the heterojunction for solar H2 production.
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Affiliation(s)
- Wei Cheng
- Department of Chemical and Biochemical EngineeringUniversity of IowaIowa CityIA52242USA
| | - Nirala Singh
- Department of Chemical EngineeringUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Will Elliott
- Department of ChemistryUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Joun Lee
- Department of Chemical and Biochemical EngineeringUniversity of IowaIowa CityIA52242USA
| | - Alan Rassoolkhani
- Department of Chemical and Biochemical EngineeringUniversity of IowaIowa CityIA52242USA
| | - Xuejun Jin
- School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China
| | - Eric W. McFarland
- Department of Chemical EngineeringUniversity of CaliforniaSanta BarbaraCA93106USA
| | - Syed Mubeen
- Department of Chemical and Biochemical EngineeringUniversity of IowaIowa CityIA52242USA
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Fabrication of co-doped CdSe quantum dot-sensitized TiO2 nanotubes by ultrasound-assisted method and their photoelectrochemical properties. J APPL ELECTROCHEM 2017. [DOI: 10.1007/s10800-017-1138-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Galstyan V. Porous TiO₂-Based Gas Sensors for Cyber Chemical Systems to Provide Security and Medical Diagnosis. SENSORS 2017; 17:s17122947. [PMID: 29257076 PMCID: PMC5751595 DOI: 10.3390/s17122947] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/13/2017] [Accepted: 12/17/2017] [Indexed: 12/31/2022]
Abstract
Gas sensors play an important role in our life, providing control and security of technical processes, environment, transportation and healthcare. Consequently, the development of high performance gas sensor devices is the subject of intense research. TiO2, with its excellent physical and chemical properties, is a very attractive material for the fabrication of chemical sensors. Meanwhile, the emerging technologies are focused on the fabrication of more flexible and smart systems for precise monitoring and diagnosis in real-time. The proposed cyber chemical systems in this paper are based on the integration of cyber elements with the chemical sensor devices. These systems may have a crucial effect on the environmental and industrial safety, control of carriage of dangerous goods and medicine. This review highlights the recent developments on fabrication of porous TiO2-based chemical gas sensors for their application in cyber chemical system showing the convenience and feasibility of such a model to provide the security and to perform the diagnostics. The most of reports have demonstrated that the fabrication of doped, mixed and composite structures based on porous TiO2 may drastically improve its sensing performance. In addition, each component has its unique effect on the sensing properties of material.
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Affiliation(s)
- Vardan Galstyan
- Sensor Lab, Department of Information Engineering, University of Brescia, Via Valotti 9, 25133 Brescia, Italy.
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