1
|
Yuan Y, Li X, Jiang L, Liang M, Zhang X, Wu S, Wu J, Tian M, Zhao Y, Qu L. Laser maskless fast patterning for multitype microsupercapacitors. Nat Commun 2023; 14:3967. [PMID: 37407565 DOI: 10.1038/s41467-023-39760-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 06/24/2023] [Indexed: 07/07/2023] Open
Abstract
Downsizing electrode architectures have significant potential for microscale energy storage devices. Asymmetric micro-supercapacitors play an essential role in various applications due to their high voltage window and energy density. However, efficient production and sophisticated miniaturization of asymmetric micro-supercapacitors remains challenging. Here, we develop a maskless ultrafast fabrication of multitype micron-sized (10 × 10 μm2) micro-supercapacitors via temporally and spatially shaped femtosecond laser. MXene/1T-MoS2 can be integrated with laser-induced MXene-derived TiO2 and 1T-MoS2-derived MoO3 to generate over 6,000 symmetric micro-supercapacitors or 3,000 asymmetric micro-supercapacitors with high-resolution (200 nm) per minute. The asymmetric micro-supercapacitors can be integrated with other micro devices, thanks to the ultrahigh specific capacitance (220 mF cm-2 and 1101 F cm-3), voltage windows in series (52 V), energy density (0.495 Wh cm-3) and power density (28 kW cm-3). Our approach enables the industrial manufacturing of multitype micro-supercapacitors and improves the feasibility and flexibility of micro-supercapacitors in practical applications.
Collapse
Affiliation(s)
- Yongjiu Yuan
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, PR China
| | - Xin Li
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China.
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China.
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China.
| | - Lan Jiang
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China.
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China.
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China.
| | - Misheng Liang
- School of Instrument Science and Opto-Electronics Engineering, Beijing Information Science and Technology University, Beijing, PR China
| | - Xueqiang Zhang
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China
| | - Shouyu Wu
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China
| | - Junrui Wu
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China
| | - Mengyao Tian
- Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, PR China
- Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, PR China
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, PR China
| | - Yang Zhao
- Key Laboratory of Cluster Science Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, PR China
| | - Liangti Qu
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, PR China
| |
Collapse
|
2
|
Effect of Thermal Treatment of Symmetric TiO2 Nanotube Arrays in Argon on Photocatalytic CO2 Conversion. Symmetry (Basel) 2022. [DOI: 10.3390/sym14122678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Symmetric titania nanotube arrays (TiO2 NTs) are a well-known photocatalyst with a large surface area and band edge potentials suitable for redox reactions. Thermal treatment of symmetrical arrays of TiO2 nanotubes in argon was used to change the carbon content of the samples. The influence of the carbon content in the structure of symmetrical TiO2 NTs on their photoelectrochemical properties and photocatalytic activity in the conversion of CO2 into organic fuel precursors has been studied. The structure, chemical, and phase composition of obtained samples were studied by X-ray analysis, Raman spectroscopy, and SEM with energy dispersive analysis. It is established that carbon-related defects in the samples accumulate electrons on the surface required for the CO2 conversion reaction. It has been shown for the first time that varying the carbon content in symmetric TiO2 NTs arrays by annealing at different temperatures in argon makes it possible to control the yield of methane and methanol in CO2 conversion. It is revealed that too high a concentration of carbon dangling bonds promotes the growth of CO2 conversion efficiency but causes instability in this process. The obtained results show a high promise of symmetric carbon-doped TiO2 NTs arrays for the photocatalytic conversion of CO2.
Collapse
|
3
|
Yadav S, Senapati S, Kumar S, Gahlaut SK, Singh JP. GLAD Based Advanced Nanostructures for Diversified Biosensing Applications: Recent Progress. BIOSENSORS 2022; 12:1115. [PMID: 36551082 PMCID: PMC9775079 DOI: 10.3390/bios12121115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/18/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Glancing angle deposition (GLAD) is a technique for the fabrication of sculpted micro- and nanostructures under the conditions of oblique vapor flux incident and limited adatom diffusion. GLAD-based nanostructures are emerging platforms with broad sensing applications due to their high sensitivity, enhanced optical and catalytic properties, periodicity, and controlled morphology. GLAD-fabricated nanochips and substrates for chemical and biosensing applications are replacing conventionally used nanomaterials due to their broad scope, ease of fabrication, controlled growth parameters, and hence, sensing abilities. This review focuses on recent advances in the diverse nanostructures fabricated via GLAD and their applications in the biomedical field. The effects of morphology and deposition conditions on GLAD structures, their biosensing capability, and the use of these nanostructures for various biosensing applications such as surface plasmon resonance (SPR), fluorescence, surface-enhanced Raman spectroscopy (SERS), and colorimetric- and wettability-based bio-detection will be discussed in detail. GLAD has also found diverse applications in the case of molecular imaging techniques such as fluorescence, super-resolution, and photoacoustic imaging. In addition, some in vivo applications, such as drug delivery, have been discussed. Furthermore, we will also provide an overview of the status of GLAD technology as well as future challenges associated with GLAD-based nanostructures in the mentioned areas.
Collapse
Affiliation(s)
- Sarjana Yadav
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sneha Senapati
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Samir Kumar
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Shashank K. Gahlaut
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Jitendra P. Singh
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| |
Collapse
|
4
|
Yan J, Xi Z, Cong L, Lv K, Xin R, Cao B, Liu B, He J, Zhang J. Synergy of Platinum Single Atoms and Platinum Atomic Clusters on Sulfur-Doped Titanium Nitride Nanotubes for Enhanced Hydrogen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2205603. [PMID: 36323620 DOI: 10.1002/smll.202205603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Highly dispersed Pt, such as Pt single atoms and atomic clusters, has great potential in the electrocatalytic hydrogen evolution reaction (HER) due to the high atomic efficiency and unique electronic configuration. Rationally regrating the electronic structure of Pt catalysts is desirable for promoting the HER performance. Herein, a 3D self-supported monolithic electrode consisting of Pt single atoms (PtSAs ) and Pt atomic clusters (PtACs ) anchored on sulfur-doped titanium nitride nanotubes (S-TiN NTs) encapsulated in polyaniline (PANI) on Ti mesh (PANI@Pt/S-TiN NTs/Ti) via a facile electrochemical strategy for efficient HER is designed and synthesized. Contributed by the unique structure and composition and the synergy of PtSAs , PtACs and S-TiN NTs, the PANI@Pt/S-TiN NTs/Ti electrode exhibits ultrahigh HER activities with only 12, 25 and 39 mV overpotentials at -10 mA cm-2 in acidic, alkaline and neutral media, respectively, and can maintain a stable performance for 25 h. Impressively, the mass activities are respectively up to 26.1, 22.4, and 17.7 times as that of Pt/C/CC electrode. Theoretical calculation results show that the synergistic effect of PtSAs , PtACs , and S-TiN NTs can optimize the electronic structure of Pt and generate multiple active sites with a thermodynamically favorable hydrogen adsorption free energy (ΔGH* ), thereby resulting in an enhanced HER activity.
Collapse
Affiliation(s)
- Jing Yan
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Zichao Xi
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Linlin Cong
- 52 Institute of China North Industries Group, 4 Hudemulin Road, Baotou, 014034, P. R. China
| | - Kun Lv
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Ruiyun Xin
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Bo Cao
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Baocang Liu
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Jinlu He
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
| | - Jun Zhang
- School of Chemistry and Chemical Engineering & Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot, 010020, P. R. China
- Inner Mongolia Academy of Science and Technology, 70 Zhaowuda Road, Hohhot, 010010, P. R. China
| |
Collapse
|
5
|
Kolajo OO, Pandit C, Thapa BS, Pandit S, Mathuriya AS, Gupta PK, Jadhav D, Lahiri D, Nag M, Upadhye VJ. Impact of cathode biofouling in microbial fuel cells and mitigation techniques. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
6
|
Bertel L, Miranda DA, García-Martín JM. Nanostructured Titanium Dioxide Surfaces for Electrochemical Biosensing. SENSORS (BASEL, SWITZERLAND) 2021; 21:6167. [PMID: 34577374 PMCID: PMC8468921 DOI: 10.3390/s21186167] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/03/2021] [Accepted: 09/13/2021] [Indexed: 12/03/2022]
Abstract
TiO2 electrochemical biosensors represent an option for biomolecules recognition associated with diseases, food or environmental contaminants, drug interactions and related topics. The relevance of TiO2 biosensors is due to the high selectivity and sensitivity that can be achieved. The development of electrochemical biosensors based on nanostructured TiO2 surfaces requires knowing the signal extracted from them and its relationship with the properties of the transducer, such as the crystalline phase, the roughness and the morphology of the TiO2 nanostructures. Using relevant literature published in the last decade, an overview of TiO2 based biosensors is here provided. First, the principal fabrication methods of nanostructured TiO2 surfaces are presented and their properties are briefly described. Secondly, the different detection techniques and representative examples of their applications are provided. Finally, the functionalization strategies with biomolecules are discussed. This work could contribute as a reference for the design of electrochemical biosensors based on nanostructured TiO2 surfaces, considering the detection technique and the experimental electrochemical conditions needed for a specific analyte.
Collapse
Affiliation(s)
- Linda Bertel
- CMN-CIMBIOS Group, Escuela de Física, Universidad Industrial de Santander, Cra 27 Cll 9, Bucaramanga 680002, Colombia; (L.B.); (D.A.M.)
| | - David A. Miranda
- CMN-CIMBIOS Group, Escuela de Física, Universidad Industrial de Santander, Cra 27 Cll 9, Bucaramanga 680002, Colombia; (L.B.); (D.A.M.)
| | - José Miguel García-Martín
- Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, E-28760 Madrid, Spain
| |
Collapse
|
7
|
Piro B, Tran HV, Thu VT. Sensors Made of Natural Renewable Materials: Efficiency, Recyclability or Biodegradability-The Green Electronics. SENSORS (BASEL, SWITZERLAND) 2020; 20:E5898. [PMID: 33086552 PMCID: PMC7594081 DOI: 10.3390/s20205898] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/05/2020] [Accepted: 10/15/2020] [Indexed: 01/24/2023]
Abstract
Nowadays, sensor devices are developing fast. It is therefore critical, at a time when the availability and recyclability of materials are, along with acceptability from the consumers, among the most important criteria used by industrials before pushing a device to market, to review the most recent advances related to functional electronic materials, substrates or packaging materials with natural origins and/or presenting good recyclability. This review proposes, in the first section, passive materials used as substrates, supporting matrixes or packaging, whether organic or inorganic, then active materials such as conductors or semiconductors. The last section is dedicated to the review of pertinent sensors and devices integrated in sensors, along with their fabrication methods.
Collapse
Affiliation(s)
- Benoît Piro
- ITODYS, CNRS, Université de Paris, F-75006 Paris, France
| | - Hoang Vinh Tran
- School of Chemical Engineering, Hanoi University of Science and Technology (HUST), 1st Dai Co Viet Road, 10000 Hanoi, Vietnam;
| | - Vu Thi Thu
- Vietnam Academy of Science and Technology (VAST), University of Science and Technology of Hanoi (USTH), 18 Hoang Quoc Viet, Cau Giay, 10000 Hanoi, Vietnam;
| |
Collapse
|
8
|
Zhao J, Zeng Y, Wang J, Xu Q, Chen R, Ni H, Cheng GJ. Ultrahigh electrocatalytic activity with trace amounts of platinum loadings on free-standing mesoporous titanium nitride nanotube arrays for hydrogen evolution reactions. NANOSCALE 2020; 12:15393-15401. [PMID: 32656553 DOI: 10.1039/d0nr01316a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Minimizing Pt loadings on electrocatalysts for hydrogen evolution reactions (HERs) is essential for their commercial applications. Herein, free-standing mesoporous titanium nitride nanotube arrays (TiN NTAs) were fabricated to serve as a substrate for Pt loadings in trace amounts. TiN NTAs were prepared by thermal treatment of anodic TiO2 NTAs at 750 °C for 3 h in a NH3 atmosphere. The uniform TiN NTAs showed an inner diameter of ∼80 nm and a length of ∼7 μm, with many mesoporous holes ranging from 5 to 10 nm in diameter on the nanotube walls. Pt species dissolved from the Pt counter electrode in electrochemical cycling were redeposited on the mesoporous TiN NTAs to produce Pt-TiN NTAs with an ultra-low Pt loading of 8.3 μg cm-2. Pt-TiN NTAs exhibited 15-fold higher mass activity towards HER than the benchmark 20 wt% Pt/C in acidic media, with an overpotential of 71 mV vs. RHE at a current density of 10 mA cm-2, a Tafel slope value of 46.4 mV dec-1 and excellent stability. The performance of Pt-TiN NTAs is also much better than that of Pt species deposited on non-mesoporous nanotube arrays due to the shortcuts originating from the mesoporous holes on the nanotube walls for electron and mass transfer.
Collapse
Affiliation(s)
- Jiayang Zhao
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Yan Zeng
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Jiao Wang
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Qizhi Xu
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Rongsheng Chen
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Hongwei Ni
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
| | - Gary J Cheng
- School of Industrial Engineering, Purdue University, West Lafayette, IN 47907-2023, USA.
| |
Collapse
|
9
|
Photocatalytically renewable peptide-based electrochemical impedance method for sensing lipopolysaccharide. Mikrochim Acta 2020; 187:349. [PMID: 32462256 DOI: 10.1007/s00604-020-04321-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
A peptide (Li5-025)-modified gold nanoparticle (AuNP)/(titania (TiO2) + 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphine (TAPP))/glassy carbon electrode (GCE) was developed for lipopolysaccharide (LPS) determination. This electrode not only performs well in the electrochemical impedance determination of LPS in serum but can also be easily regenerated under light irradiation. Using Fe(CN)63-/4- as a redox probe, LPS recognition can be indicated by the significantly increased electron-transfer resistance (Ret) as a result of the coaction of the increased steric hindrance from the peptide-LPS complex and the electrostatic repulsion between LPS and Fe(CN)63-/4-. The impedimetric signal was acquired in the frequency range 0.1 Hz ~ 100 kHz with an initial voltage of 174 mV and an amplitude of 10 mV. The resistance changes (ΔRet) are linearly related to the LPS concentrations in a broad range (0.1 pg mL-1 ~ 100 ng mL-1) with a low detection limit (0.08 pg mL-1). Importantly, the electrode shows high selectivity to LPS from Escherichia coli O55:B5 compared to other bacterial sources and considerable anti-interference to 0.1% fetal calf serum, demonstrating its potential application in clinically relevant samples. Another highlight is that the AuNP/(TiO2 + TAPP)/GCE surface can be photocatalytically regenerated under light irradiation (50 mW cm-2, 300-2500 nm) without any obvious damage to the electrode microstructure. After simple peptide re-immobilization, the regenerated electrode demonstrates LPS response similar to the peptide less one, and the deviation is only 2.89% after 5-cycle reuse. Graphical abstract A peptide (Li5-025)-modified AuNP/(TiO2 + TAPP porphine)/GCE was proposed, which not only has excellent electrochemical analytical performances for LPS assay in serum but also can be reused after light irradiation and subsequent peptide re-immobilization.
Collapse
|
10
|
Ma L, Yue Z, Huo G, Zhang S, Zhu B, Zhang S, Huang W. 3D Hydrogen Titanate Nanotubes on Ti Foil: A Carrier for Enzymatic Glucose Biosensor. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1024. [PMID: 32074985 PMCID: PMC7070752 DOI: 10.3390/s20041024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/12/2020] [Accepted: 02/12/2020] [Indexed: 05/08/2023]
Abstract
Glucose oxidase (GOx) based biosensors are commercialized and marketed for the high selectivity of GOx. Incorporation nanomaterials with GOx can increase the sensitivity performance. In this work, an enzyme glucose biosensor based on nanotubes was fabricated. By using Ti foil as a carrier, hydrogen titanate nanotubes (HTNTs), which present fine 3D structure with vast pores, were fabricated in-situ by the hydrothermal treatment. The multilayer nanotubes are open-ended with a diameter of 10 nm. Then glucose oxidase (GOx) was loaded on the nanotubes by cross-linking to form an electrode of the amperometric glucose biosensor (GOx/HTNTs/Ti electrode). The fabricated GOx/HTNTs/Ti electrode had a linear response to 1-10 mM glucose, and the response time was 1.5 s. The sensitivity of the biosensor was 1.541 μA·mM-1·cm-2, and the detection limit (S/N = 3) was 59 μM. Obtained results indicate that the in-situ fabrication and unique 3D structure of GOx/HTNTs/Ti electrode are beneficial for its sensitivity.
Collapse
Affiliation(s)
- Lulu Ma
- The Key Laboratory of Advanced Energy Materials Chemistry (MOE), and TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; (L.M.); (G.H.); (S.Z.); (S.Z.)
- Hebei Normal University of Science & Technology, Hebei 066004, China
| | - Zhao Yue
- Department of Microelectronics, Nankai University, Tianjin 300350, China;
| | - Guona Huo
- The Key Laboratory of Advanced Energy Materials Chemistry (MOE), and TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; (L.M.); (G.H.); (S.Z.); (S.Z.)
| | - Shasha Zhang
- The Key Laboratory of Advanced Energy Materials Chemistry (MOE), and TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; (L.M.); (G.H.); (S.Z.); (S.Z.)
| | - Baolin Zhu
- The Key Laboratory of Advanced Energy Materials Chemistry (MOE), and TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; (L.M.); (G.H.); (S.Z.); (S.Z.)
- College of Chemistry, National Demonstration Center for Experimental Chemistry Education (Nankai University), Tianjin 300071, China
| | - Shoumin Zhang
- The Key Laboratory of Advanced Energy Materials Chemistry (MOE), and TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; (L.M.); (G.H.); (S.Z.); (S.Z.)
| | - Weiping Huang
- The Key Laboratory of Advanced Energy Materials Chemistry (MOE), and TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China; (L.M.); (G.H.); (S.Z.); (S.Z.)
| |
Collapse
|
11
|
A short review on electrochemically self-doped TiO2 nanotube arrays: Synthesis and applications. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0365-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
12
|
Zhao J, Cheng L, Wang J, Liu Y, Yang J, Xu Q, Chen R, Ni H. Heteroatom-doped carbon nanofilm embedded in highly ordered TiO2 nanotube arrays by thermal nitriding with enhanced electrochemical activity. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113513] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
13
|
Liu C, Zhang AY, Si Y, Pei DN, Yu HQ. Photochemical Protection of Reactive Sites on Defective TiO 2- x Surface for Electrochemical Water Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:7641-7652. [PMID: 31150211 DOI: 10.1021/acs.est.9b01307] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The electrode is the key in electrochemical process for water and wastewater treatment. Many nonstoichiometric metal oxides are active electrode materials but have poor stability under strong anodic polarization due to their susceptible nature of the oxygen vacancies on surface and subsurface as defective reactive sites. In this work, a novel photochemical protecting strategy is proposed to stabilize the defective reactive sites on the TiO2- x surface and subsurface for long-term anodic oxidation of pollutants. With this strategy, a novel photoassisted electrochemical system at low anodic bias is further constructed. Such a system exhibits a high protecting capacity at a low operation cost for electrochemical degradation of bisphenol A (BPA), a typical persistent organic pollutant. Its excellent photochemical protecting capacity is found to be mainly attributed to the mild non-band-gap excitation pathways on the defective TiO2- x electrode under both visible-light irradiation and moderate anodic polarization. Under real sunlight irradiation, a 20 run cyclic test for BPA degradation demonstrates the excellent performance and stability of the constructed system at low bias without significant oxygen evolution. Our work provides a new opportunity to utilize the defective and reactive TiO2- x for efficient, stable, and cost-effective electrochemical water treatment with the aid of its photo- and electrochemical bifunctional properties.
Collapse
Affiliation(s)
- Chang Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei , 230026 , China
| | - Ai-Yong Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei , 230026 , China
- Department of Municipal Engineering , Hefei University of Technology , Hefei , 230009 , China
| | - Yang Si
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei , 230026 , China
| | - Dan-Ni Pei
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei , 230026 , China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei , 230026 , China
| |
Collapse
|
14
|
Si Y, Zhang AY, Liu C, Pei DN, Yu HQ. Photo-assisted electrochemical detection of bisphenol A in water samples by renewable {001}-exposed TiO 2 single crystals. WATER RESEARCH 2019; 157:30-39. [PMID: 30952006 DOI: 10.1016/j.watres.2019.03.088] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/16/2019] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Bisphenol A (BPA) is a semi-persistent environmental endocrine disrupter and widely present in aqueous environments. Electrochemical detection is an effective method to monitor pollutants like BPA in aqueous environments. However, the electrode fouling from anodic polymeric products is one main barrier of electrochemical sensors for their practical applications. In this work, a renewable electrochemical sensor was rationally designed, constructed and tested for efficient BPA detection. The TiO2 anodic material was surface-engineered by inorganic-framework molecular imprinting sites with tailored morphological shape, exposed facet and crystal structure. This electrode could be activated mainly as an electrochemical catalyst and partially as a photochemical catalyst. The developed TiO2-based sensor exhibited a good detection reliability and cyclic stability for determining BPA in water samples, with an electrochemical signal decrease of less than 5.0% in 10-run cyclic tests. By virtue of the bi-functional properties of the tailored TiO2 anodic material, a unique photo-assisted electrochemical sensor was further developed, in which analyte digestion and analytical signal originated mainly from anodic conversion. Such a synergistic digesting mechanism distinguishes it from the reported electro-assisted photochemical TiO2 sensors. Our work provides a robust sensor for monitoring pollutants in aqueous environments and a new opportunity to develop renewable electrode materials with good reusability.
Collapse
Affiliation(s)
- Yang Si
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Ai-Yong Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China; Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Chang Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Dan-Ni Pei
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
| |
Collapse
|
15
|
Gwag EH, Moon SY, Mondal I, Park JY. Influence of carbon doping concentration on photoelectrochemical activity of TiO2 nanotube arrays under water oxidation. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02226g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The effect of doping concentrations of TiO2 nanotube on photocatalytic activity was investigated because of its potential for the smart design of more energy- and cost-efficient catalytic materials.
Collapse
Affiliation(s)
- Eun Heui Gwag
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
- Centre for Nanomaterials and Chemical Reactions
| | - Song Yi Moon
- Centre for Nanomaterials and Chemical Reactions
- Institute of Basic Science (IBS)
- Daejeon 305-701
- Republic of Korea
- Department of Chemistry
| | - Indranil Mondal
- Centre for Nanomaterials and Chemical Reactions
- Institute of Basic Science (IBS)
- Daejeon 305-701
- Republic of Korea
| | - Jeong Young Park
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701
- Republic of Korea
- Centre for Nanomaterials and Chemical Reactions
| |
Collapse
|
16
|
Zarifi MH, Wiltshire BD, Mahdi N, Shankar K, Daneshmand M. Distinguishing between Deep Trapping Transients of Electrons and Holes in TiO 2 Nanotube Arrays Using Planar Microwave Resonator Sensor. ACS APPLIED MATERIALS & INTERFACES 2018; 10:29857-29865. [PMID: 29767958 DOI: 10.1021/acsami.8b03629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A large signal direct current (DC) bias and a small signal microwave bias were simultaneously applied to TiO2 nanotube membranes mounted on a planar microwave resonator. The DC bias modulated the electron concentration in the TiO2 nanotubes and was varied between 0 and 120 V in this study. Transients immediately following the application and removal of DC bias were measured by monitoring the S-parameters of the resonator as a function of time. The DC bias stimulated Poole-Frenkel-type trap-mediated electrical injection of excess carriers into TiO2 nanotubes, which resulted in a near-constant resonant frequency but a pronounced decrease in the microwave amplitude due to free electron absorption. When ultraviolet illumination and DC bias were both present and then stepwise removed, the resonant frequency shifted due to trapping-mediated change in the dielectric constant of the nanotube membranes. Characteristic lifetimes of 60-80, 300-800, and ∼3000 s were present regardless of whether light or bias was applied and were also observed in the presence of a hole scavenger, which we attributed to oxygen adsorption and deep electron traps, whereas another characteristic lifetime >8000 s was only present when illumination was applied, and is attributed to the presence of hole traps.
Collapse
Affiliation(s)
- Mohammad H Zarifi
- School of Engineering , University of British Columbia , Kelowna , British Columbia V1V 1V7 , Canada
| | - Benjamin D Wiltshire
- Department of Electrical and Computer Engineering , University of Alberta , Edmonton , Alberta T6G 2V4 , Canada
| | - Najia Mahdi
- Department of Electrical and Computer Engineering , University of Alberta , Edmonton , Alberta T6G 2V4 , Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering , University of Alberta , Edmonton , Alberta T6G 2V4 , Canada
| | - Mojgan Daneshmand
- Department of Electrical and Computer Engineering , University of Alberta , Edmonton , Alberta T6G 2V4 , Canada
| |
Collapse
|
17
|
An antibacterial platform based on capacitive carbon-doped TiO 2 nanotubes after direct or alternating current charging. Nat Commun 2018; 9:2055. [PMID: 29795383 PMCID: PMC5967314 DOI: 10.1038/s41467-018-04317-2] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 04/20/2018] [Indexed: 01/12/2023] Open
Abstract
Electrical interactions between bacteria and the environment are delicate and essential. In this study, an external electrical current is applied to capacitive titania nanotubes doped with carbon (TNT-C) to evaluate the effects on bacteria killing and the underlying mechanism is investigated. When TNT-C is charged, post-charging antibacterial effects proportional to the capacitance are observed. This capacitance-based antibacterial system works well with both direct and alternating current (DC, AC) and the higher discharging capacity in the positive DC (DC+) group leads to better antibacterial performance. Extracellular electron transfer observed during early contact contributes to the surface-dependent post-charging antibacterial process. Physiologically, the electrical interaction deforms the bacteria morphology and elevates the intracellular reactive oxygen species level without impairing the growth of osteoblasts. Our finding spurs the design of light-independent antibacterial materials and provides insights into the use of electricity to modify biomaterials to complement other bacteria killing measures such as light irradiation. Bacteria are known to be sensitive to electrical interactions with the environment. Here, the authors report on a study into how the antibacterial properties of carbon-doped titania nanotubes are affected by capacitance after charging with direct and alternating currents.
Collapse
|
18
|
Wang YW, Liu YL, Xu JQ, Qin Y, Huang WH. Stretchable and Photocatalytically Renewable Electrochemical Sensor Based on Sandwich Nanonetworks for Real-Time Monitoring of Cells. Anal Chem 2018; 90:5977-5981. [DOI: 10.1021/acs.analchem.8b01396] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ya-Wen Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yan-Ling Liu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Jia-Quan Xu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yu Qin
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Wei-Hua Huang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| |
Collapse
|
19
|
Pei DN, Zhang AY, Pan XQ, Si Y, Yu HQ. Electrochemical Sensing of Bisphenol A on Facet-Tailored TiO2 Single Crystals Engineered by Inorganic-Framework Molecular Imprinting Sites. Anal Chem 2018; 90:3165-3173. [DOI: 10.1021/acs.analchem.7b04466] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Dan-Ni Pei
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China
| | - Ai-Yong Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China
- Department of Municipal Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xiao-Qiang Pan
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China
| | - Yang Si
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China
| |
Collapse
|
20
|
Muthuchamy N, Gopalan A, Lee KP. Highly selective non-enzymatic electrochemical sensor based on a titanium dioxide nanowire–poly(3-aminophenyl boronic acid)–gold nanoparticle ternary nanocomposite. RSC Adv 2018; 8:2138-2147. [PMID: 35542594 PMCID: PMC9077267 DOI: 10.1039/c7ra09097h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 12/19/2017] [Indexed: 12/02/2022] Open
Abstract
A novel three component (titanium dioxide nanowire (TiO2 NW), poly(3-aminophenyl boronic acid) (PAPBA) and gold nanoparticles (Au NPs)) based ternary nanocomposite (TNC) (designated as TiO2 NW/PAPBA–Au TNC) was prepared by a simple two-stage synthetic approach and utilized for the fabrication of a non-enzymatic (enzyme-free) glucose (NEG) sensor. In stage 2, the PAPBA–Au NC was formed by oxidative polymerization of 3-APBA using HAuCl4 as oxidant on the surface of pre-synthesized TiO2 NW via electrospinning (stage 1). The formation of PAPBA–Au NC as the shell on the surface of the TiO2 NW (core) was confirmed by field emission scanning electron microscopy (FE-SEM). Notably, we obtained a good peak to peak separation, and a high peak current for the redox Fe(CN)63−/4− process indicating excellent electron transfer capability at the glassy carbon electrode (GCE)/TiO2 NW/PAPBA–Au TNC interface. Also, the fabricated TiO2 NW/PAPBA–Au TNC provides excellent electrocatalytic activity towards glucose detection in neutral (pH = 7.0) phosphate buffer solution. The detection of glucose was monitored using differential pulse voltammetry. The obtained sensitivity and detection limits are superior to many of the TiO2 based enzymatic and non-enzymatic glucose sensors reported in the literature. Furthermore, the TiO2 NW/PAPBA–Au TNC sensor is preferred because of its high selectivity to glucose in the presence of co-existing interfering substances and practical application for monitoring glucose in human blood serum samples. A highly selective and sensitive enzymeless electrochemical glucose sensor was fabricated based on a novel ternary nanocomposite composed of titanium dioxide nanowire, poly(3-aminophenyl boronic acid) and gold nanoparticles.![]()
Collapse
Affiliation(s)
- N. Muthuchamy
- Research Institute of Advanced Energy Technology
- Kyungpook National University
- Daegu
- South Korea
| | - A. Gopalan
- Research Institute of Advanced Energy Technology
- Kyungpook National University
- Daegu
- South Korea
- Department of Nanoscience and Nanotechnology
| | - Kwang-Pill Lee
- Research Institute of Advanced Energy Technology
- Kyungpook National University
- Daegu
- South Korea
- Department of Nanoscience and Nanotechnology
| |
Collapse
|
21
|
Liu C, Zhang AY, Si Y, Pei DN, Yu HQ. Photochemical Anti-Fouling Approach for Electrochemical Pollutant Degradation on Facet-Tailored TiO 2 Single Crystals. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:11326-11335. [PMID: 28891634 DOI: 10.1021/acs.est.7b04105] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Electrochemical degradation of refractory pollutants at low bias before oxygen evolution exhibits high current efficiency and low energy consumption, but its severe electrode fouling largely limits practical applications. In this work, a new antifouling strategy was developed and validated for electrochemical pollutant degradation by photochemical oxidation on facet-tailored {001}-exposed TiO2 single crystals. Electrode fouling from anodic polymers at a low bias was greatly relieved by the free ·OH-mediated photocatalysis under UV irradiation, thus efficient and stable degradation of bisphenol A, a typical environmental endocrine disrupter, and treatment of landfill leachate were accomplished without remarkable oxygen evolution in synergistic photoassisted electrochemical system. Electrochemical and spectroscopic measurements indicated a clean electrode surface during cyclic pollutant degradation. Such a photochemical antifouling strategy for low-bias anodic pollutants degradation was mainly attributed to the improved electric conductivity and excellent electrochemical and photochemical activities of tailored TiO2 anodic material, whose unique properties originated from the favorable surface atomic and electronic structures of high-energy {001} polar facet and single-crystalline structure. Our work opens up a brand new approach to develop catalytic systems for efficient degradation of refractory contaminants in water and wastewater.
Collapse
Affiliation(s)
- Chang Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Ai-Yong Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
- Department of Municipal Engineering, Hefei University of Technology , Hefei, 230009, China
| | - Yang Si
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Dan-Ni Pei
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China , Hefei, 230026, China
| |
Collapse
|
22
|
Jayanth Babu K, Sasya M, Nesakumar N, Shankar P, Gumpu MB, Ramachandra BL, Kulandaisamy AJ, Rayappan JBB. Non-enzymatic detection of glucose in fruits using TiO2–Mn3O4 hybrid nano interface. APPLIED NANOSCIENCE 2017. [DOI: 10.1007/s13204-017-0571-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
23
|
Duo HH, Xu JQ, Liu YL, Jin ZH, Hu XB, Huang WH. Construction of visible light-induced renewable electrode for monitoring of living cells. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.06.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
24
|
Hu L, Fong CC, Zhang X, Chan LL, Lam PKS, Chu PK, Wong KY, Yang M. Au Nanoparticles Decorated TiO2 Nanotube Arrays as a Recyclable Sensor for Photoenhanced Electrochemical Detection of Bisphenol A. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:4430-8. [PMID: 27002339 DOI: 10.1021/acs.est.5b05857] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A photorefreshable and photoenhanced electrochemical sensing platform for bisphenol A (BPA) detection based on Au nanoparticles (NPs) decorated carbon doped TiO2 nanotube arrays (TiO2/Au NTAs) is described. The TiO2/Au NTAs were prepared by quick annealing of anodized nanotubes in argon, followed by controllable electrodeposition of Au NPs. The decoration of Au NPs not only improved photoelectrochemical behavior but also enhanced electrocatalytic activities of the resulted hybrid NTAs. Meanwhile, the high photocatalytic activity of the NTAs allowed the electrode to be readily renewed without damaging the microstructures and surface states after a short UV treatment. The electrochemical detection of BPA on TiO2/Au NTAs electrode was significantly improved under UV irradiation as the electrode could provide fresh reaction surface continuously and the further increased photocurrent resulting from the improved separation efficiency of the photogenerated electron-hole pairs derived from the consumption of holes by BPA. The results showed that the refreshable TiO2/Au NTAs electrode is a promising sensor for long-term BPA monitoring with the detection limit (S/N = 3) of 6.2 nM and the sensitivity of 2.8 μA·μM(-1)·cm(-2).
Collapse
Affiliation(s)
- Liangsheng Hu
- Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
- Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Chi-Chun Fong
- Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
- Key Laboratory of Biochip Technology, Shenzhen Biotech and Health Centre, City University of Hong Kong , Shenzhen 518057, People's Republic of China
- State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Xuming Zhang
- Department of Physics and Materials Science, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Leo Lai Chan
- Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
- State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Paul K S Lam
- State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Paul K Chu
- Department of Physics and Materials Science, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Kwok-Yin Wong
- Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Mengsu Yang
- Department of Biomedical Sciences, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
- Key Laboratory of Biochip Technology, Shenzhen Biotech and Health Centre, City University of Hong Kong , Shenzhen 518057, People's Republic of China
- State Key Laboratory in Marine Pollution, City University of Hong Kong , 83 Tat Chee Avenue, Kowloon, Hong Kong
| |
Collapse
|
25
|
Xu JQ, Duo HH, Zhang YG, Zhang XW, Fang W, Liu YL, Shen AG, Hu JM, Huang WH. Photochemical Synthesis of Shape-Controlled Nanostructured Gold on Zinc Oxide Nanorods as Photocatalytically Renewable Sensors. Anal Chem 2016; 88:3789-95. [PMID: 26928162 DOI: 10.1021/acs.analchem.5b04810] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Biosensors always suffer from passivation that prevents their reutilization. To address this issue, photocatalytically renewable sensors composed of semiconductor photocatalysts and sensing materials have emerged recently. In this work, we developed a robust and versatile method to construct different kinds of renewable biosensors consisting of ZnO nanorods and nanostructured Au. Via a facile and efficient photochemical reduction, various nanostructured Au was obtained successfully on ZnO nanorods. As-prepared sensors concurrently possess excellent sensing capability and desirable photocatalytic cleaning performance. Experimental results demonstrate that dendritic Au/ZnO composite has the strongest surface-enhanced Raman scattering (SERS) enhancement, and dense Au nanoparticles (NPs)/ZnO composite has the highest electrochemical activity, which was successfully used for electrochemical detection of NO release from cells. Furthermore, both of the SERS and electrochemical sensors can be regenerated efficiently for renewable applications via photodegrading adsorbed probe molecules and biomolecules. Our strategy provides an efficient and versatile method to construct various kinds of highly sensitive renewable sensors and might expand the application of the photocatalytically renewable sensor in the biosensing area.
Collapse
Affiliation(s)
- Jia-Quan Xu
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Huan-Huan Duo
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Yu-Ge Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Xin-Wei Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Wei Fang
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Yan-Ling Liu
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Ai-Guo Shen
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Ji-Ming Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| | - Wei-Hua Huang
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, China
| |
Collapse
|
26
|
Yu C, Wang Y, Zhang J, Shu X, Cui J, Qin Y, Zheng H, Liu J, Zhang Y, Wu Y. Integration of mesoporous nickel cobalt oxide nanosheets with ultrathin layer carbon wrapped TiO2 nanotube arrays for high-performance supercapacitors. NEW J CHEM 2016. [DOI: 10.1039/c6nj00359a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel nanocomposite NiCo2O4/C-TNAs were synthesized for high-performance supercapacitors with a specific capacitance of 934.9 F g−1 at a current density of 2 A g−1.
Collapse
|
27
|
Kim C, Kim S, Hong SP, Lee J, Yoon J. Effect of doping level of colored TiO2 nanotube arrays fabricated by electrochemical self-doping on electrochemical properties. Phys Chem Chem Phys 2016; 18:14370-5. [DOI: 10.1039/c6cp01799a] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The objective of this study was to investigate the effect of the doping level of blue and black TiO2 NTAs on their electrochemical properties, including the capacitive and oxidant-generating properties.
Collapse
Affiliation(s)
- Choonsoo Kim
- School of Chemical and Biological Engineering
- College of Engineering
- Institute of Chemical Process
- Seoul National University (SNU)
- Seoul 151-742
| | - Seonghwan Kim
- School of Chemical and Biological Engineering
- College of Engineering
- Institute of Chemical Process
- Seoul National University (SNU)
- Seoul 151-742
| | - Sung Pil Hong
- School of Chemical and Biological Engineering
- College of Engineering
- Institute of Chemical Process
- Seoul National University (SNU)
- Seoul 151-742
| | - Jaehan Lee
- School of Chemical and Biological Engineering
- College of Engineering
- Institute of Chemical Process
- Seoul National University (SNU)
- Seoul 151-742
| | - Jeyong Yoon
- School of Chemical and Biological Engineering
- College of Engineering
- Institute of Chemical Process
- Seoul National University (SNU)
- Seoul 151-742
| |
Collapse
|
28
|
Xu JQ, Liu YL, Wang Q, Duo HH, Zhang XW, Li YT, Huang WH. Photocatalytically Renewable Micro-electrochemical Sensor for Real-Time Monitoring of Cells. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507354] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
29
|
Xu J, Liu Y, Wang Q, Duo H, Zhang X, Li Y, Huang W. Photocatalytically Renewable Micro‐electrochemical Sensor for Real‐Time Monitoring of Cells. Angew Chem Int Ed Engl 2015; 54:14402-6. [DOI: 10.1002/anie.201507354] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/09/2015] [Indexed: 01/01/2023]
Affiliation(s)
- Jia‐Quan Xu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| | - Yan‐Ling Liu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| | - Qian Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| | - Huan‐Huan Duo
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| | - Xin‐Wei Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| | - Yu‐Tao Li
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| | - Wei‐Hua Huang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)
| |
Collapse
|
30
|
Ge M, Cao C, Li S, Zhang S, Deng S, Huang J, Li Q, Zhang K, Al-Deyab SS, Lai Y. Enhanced photocatalytic performances of n-TiO₂ nanotubes by uniform creation of p-n heterojunctions with p-Bi₂O₃ quantum dots. NANOSCALE 2015; 7:11552-60. [PMID: 26084384 DOI: 10.1039/c5nr02468d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An ultrasonication-assisted successive ionic layer adsorption and reaction (SILAR) strategy was developed for uniform deposition of high density p-type Bi2O3 quantum dots on n-type TiO2 nanotube arrays (Bi2O3@TiO2 NTAs), which were constructed by electrochemical anodization in ethylene glycol containing the electrolyte. Compared with pristine TiO2 NTAs, the Bi2O3 quantum dots sensitized TiO2 NTAs exhibited highly efficient photocatalytic degradation of methyl orange (MO). The kinetic constant of Bi2O3@TiO2 NTAs prepared by an ultrasonication-assisted SILAR process of 4 cycles was 1.95 times higher than that of the pristine TiO2 NTA counterpart. The highly efficient photocatalytic activity is attributed to the synergistic effect between the formation of a uniform p-n heterojunction with high-density for enhancing light absorption and facilitating photogenerated electron-hole separation/transfer. The results suggest that Bi2O3@TiO2 p-n heterojunction nanotube arrays are very promising for enhancing the photocatalytic activity and open up a promising strategy for designing and constructing high efficiency heterogeneous semiconductor photocatalysts.
Collapse
Affiliation(s)
- Mingzheng Ge
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Kim C, Kim S, Lee J, Kim J, Yoon J. Capacitive and oxidant generating properties of black-colored TiO2 nanotube array fabricated by electrochemical self-doping. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7486-7491. [PMID: 25793300 DOI: 10.1021/acsami.5b00123] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recently, black-colored TiO2 NTA (denoted as black TiO2 NTA) fabricated by self-doping of TiO2 NTA with the amorphous phase led to significant success as a visible-light-active photocatalyst. This enhanced photocatalytic activity is largely attributed to a higher charge carrier density as an effect of electrochemical self-doping resulting in a higher optical absorbance and lower transport resistance. Nevertheless, the potential of black TiO2 NTA for other electrochemical applications, such as a supercapacitor and an oxidant-generating anode, has not been fully investigated. Here, we report the capacitive and oxidant generating properties of black TiO2 NTA. The black TiO2 NTA exhibited significantly a high value for areal capacitance with a good rate capability and novel electrocatalytic activity in generating (•)OHs and Cl2 compared to pristine TiO2 NTA with the anatase phase. This study suggests that the black TiO2 NTA be applied as a supercapacitor and an oxidant generating anode.
Collapse
Affiliation(s)
- Choonsoo Kim
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea
| | - Seonghwan Kim
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea
| | - Jaehan Lee
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea
| | - Jiye Kim
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea
| | - Jeyong Yoon
- School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul 151-742, Republic of Korea
| |
Collapse
|
32
|
Huo K, Li Y, Chen R, Gao B, Peng C, Zhang W, Hu L, Zhang X, Chu PK. Recyclable Non-Enzymatic Glucose Sensor Based on Ni/NiTiO3/TiO2Nanotube Arrays. Chempluschem 2015; 80:576-582. [DOI: 10.1002/cplu.201402288] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 10/13/2014] [Indexed: 11/06/2022]
|
33
|
Pal N, Saha B, Kundu SK, Bhaumik A, Banerjee S. A highly efficient non-enzymatic glucose biosensor based on a nanostructured NiTiO3/NiO material. NEW J CHEM 2015. [DOI: 10.1039/c5nj01341k] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
NiTiO3/NiO self-assembled crystalline nanoparticles synthesized via a surfactant-assisted EISA method exhibit excellent sensitivity and selectivity towards glucose biosensing with a very low limit of detection.
Collapse
Affiliation(s)
- Nabanita Pal
- Surface Physics and Materials Science Division
- Saha Institute of Nuclear Physics
- Kolkata-700064
- India
| | - Barnamala Saha
- Surface Physics and Materials Science Division
- Saha Institute of Nuclear Physics
- Kolkata-700064
- India
| | - Sudipta K. Kundu
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata-700 032
- India
| | - Asim Bhaumik
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata-700 032
- India
| | - Sangam Banerjee
- Surface Physics and Materials Science Division
- Saha Institute of Nuclear Physics
- Kolkata-700064
- India
| |
Collapse
|
34
|
Photocatalytic synthesis and synergistic effect of Prussian blue-decorated Au nanoparticles/TiO2 nanotube arrays for H2O2 amperometric sensing. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.01.149] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
35
|
Huo K, Gao B, Fu J, Zhao L, Chu PK. Fabrication, modification, and biomedical applications of anodized TiO2 nanotube arrays. RSC Adv 2014. [DOI: 10.1039/c4ra01458h] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Recent research activities on the surface modification and biomedical applications of TiO2 NTAs are reviewed.
Collapse
Affiliation(s)
- Kaifu Huo
- Department of Physics and Materials Science
- City University of Hong Kong
- Kowloon, China
- Wuhan National Laboratory for Optoelectronics
- Huazhong University of Science and Technology
| | - Biao Gao
- School of materials and metallurgy
- Wuhan University of Science and Technology
- Wuhan 430081, China
| | - Jijiang Fu
- School of materials and metallurgy
- Wuhan University of Science and Technology
- Wuhan 430081, China
| | - Lingzhou Zhao
- State Key Laboratory of Military Stomatology
- Department of Periodontology
- School of Stomatology
- The Fourth Military Medical University
- Xi'an 710032, China
| | - Paul K. Chu
- Department of Physics and Materials Science
- City University of Hong Kong
- Kowloon, China
| |
Collapse
|
36
|
HUANG WENFEI, WU PINJIUN, HSU WEICHIH, WU CHIHWEI, LIANG KS, LIN MC. CARBON-DOPEDTiO2NANOTUBES: EXPERIMENTAL AND COMPUTATIONAL STUDIES. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500077] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
C-doped TiO2nanotubes (NTs) with anatase structure, prepared by anodizing the polished Ti foils, were characterized using X-ray diffraction (XRD), field-emission scanning electron microscope (FE-SEM), and synchrotron-based X-ray photoemission spectroscopy (XPS). XPS results show electron losses in C atoms, no electron change in Ti atoms, and two doping energy levels appeared in band gaps. Structural geometries, DOSs, PDOSs, and Bader charge analyses of C -doped TiO2anatase are predicted by periodic DFT calculations. Eight doping positions were taken into consideration: two substitutional cases (in oxygen and titanium sites) and six interstitial cases. We found that the interstitial carbon doping type is the most stable one, whereas the substitutional cases are rather unstable. Band-gap modifications can also be found in oxygen substitution, but not in titanium substitution. Both band-gap modification and non-band-gap modification are found in the interstitial carbon doping. In these eight C -doping systems, only the C atom in the oxygen substitution case gains electrons, 1.14 e, and others present electron losses within 0.5–4.00 e. The results of XPS measurements, DOSs calculations, and Bader charge analyses show that carbon interstitial is the most likely doping type for the C -doped TiO2NTs.
Collapse
Affiliation(s)
- WEN-FEI HUANG
- Center of Interdisciplinary Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
| | - PIN-JIUN WU
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - WEI-CHIH HSU
- Center of Interdisciplinary Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
| | - CHIH-WEI WU
- Center of Interdisciplinary Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
| | - K. S. LIANG
- Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan
| | - M. C. LIN
- Center of Interdisciplinary Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
| |
Collapse
|
37
|
Mole F, Wang J, Clayton DA, Xu C, Pan S. Highly conductive nanostructured C-TiO2 electrodes with enhanced electrochemical stability and double layer charge storage capacitance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10610-10619. [PMID: 22757967 DOI: 10.1021/la300858d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The present work reports the structural and electrochemical properties of carbon-modified nanostructured TiO(2) electrodes (C-TiO(2)) prepared by anodizing titanium in a fluoride-based electrolyte followed by thermal annealing in an atmosphere of methane and hydrogen in the presence of Fe precursors. The C-TiO(2) nanostructured electrodes are highly conductive and contain more than 1 × 10(10) /cm(2) of nanowires or nanotubes to enhance their double layer charge capacitance and electrochemical stability. Electrogenerated chemiluminescence (ECL) study shows that a C-TiO(2) electrode can replace noble metal electrodes for ultrasensitive ECL detection. Dynamic potential control experiments of redox reactions show that the C-TiO(2) electrode has a broad potential window for a redox reaction. Double layer charging capacitance of the C-TiO(2) electrode is found to be 3 orders of magnitude higher than an ideal planar electrode because of its high surface area and efficient charge collection capability from the nanowire structured surface. The effect of anodization voltage, surface treatment with Fe precursors for carbon modification, the barrier layer between the Ti substrate, and anodized layer on the double layer charging capacitance is studied. Ferrocene carboxylic acid binds covalently to the anodized Ti surface forming a self-assembled monolayer, serving as an ideal precursor layer to yield C-TiO(2) electrodes with better double layer charging performance than the other precursors.
Collapse
Affiliation(s)
- Fraser Mole
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | | | | | | | | |
Collapse
|
38
|
Hosseini MG, Momeni MM. Fabrication and photo-electrocatalytic activity of highly oriented titania nanotube loaded with platinum nanoparticles for electro-oxidation of lactose: A new recyclable electro-catalyst. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2011.12.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|