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Synthesis and photoelectrical performance of nanoscale PbS and Bi2S3 co-sensitized on tio2 nanotube arrays

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Journal of Modern Transportation 2017年第1期25卷 52-57页

作者： Fanggong Cai Min Pan Yong Feng Guo Yan Yong Zhang Yong Zhao Superconductivity and New Energy R&D Center Key Laboratory of Advanced Technology of Materials(Ministryof Education of China)Southwest Jiaotong UniversityMail Stop 165#Cheng du 610031People's Republic of China National Engineering Labortary for Superconducting Materials Western Superconducting Technologies Co.LtdXi'anPeople's Republic of China School of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610031People's Republic of China

tio2 films have been widely applied in photo- voltaic conversion techniques. tio2 nanotube arrays （tio2 NAs） can be grown directly on the surface of metal Ti by the anodic oxidation method. Bi2S3 and PbS nanoparticles （NPs） were firstly co-sensitized on tioa NAs （denoted as PbS/Bi2S3（n）/tio2 NAs） by a two-step process containing hydrothermal and sonication-assisted SILAR method. When the concentration of Bi3＋ is 5 mmol/L, the best photoelectrical performance was obtained under simulated solar irradiation. The short-circuit photocurrent （Jsc） and photoconversion efficiency （η） of PbS/Bi2S3（5）/tio2 NAs electrode were 4.70 mA/cm and 1.13 %, respectively.

关键词： Solar cells tio2 nanotube arrays Bi2S3 PbS Surface photovoltage

Galvanostatic deposition of Pt nanoparticles on tio2 nanotube arrays for amperometric detection of hydrogen peroxide at low overpotentials

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Galvanostatic deposition of Pt nanoparticles on TiO2 nanotub...

第八届中国功能材料及其应用学术会议

作者： LIU Jia-qing RUAN Li-li XU Guang-qing LV Jun WU Yu-cheng Laboratory of Functional Nanomaterials and Devices School of Materials Science and EngineeringHefei University of Technology

ISBN: (纸本)9783037859698

Highly ordered tio nanotube arrays(NTAs) modified with Pt nanoparticles(Pt/tio NTAs)have been prepared by anodization of Ti foils followed by electrochemical deposition and employed to improve the performance of the low-overpotential determination of HO in solution.Morphologies of tio and Pt/tio NTAs were observed by SEM and TEM.The electrochemical behaviors of tio and Pt/tio NTAs were compared by cyclic voltammograms(CVs) in phosphate buffer solutions in absence and prensence of 10 mM HO,which showed that Pt nanoparticles can enhance the electrochemical activities of tioNTAs and achieve low-overpotential determination of HO.Amperometric method with an applied potential of-100 mV was used for HO detemination,which demonstrated a good HO sensing with sensitivity of5.4 μA-cm·mM.

关键词： tio2 nanotube arrays Pt nanoparticles H2O2 detection low overpotential amperometric method

Synthesis and Structure Properties of Free-Standing tio2 nanotube arrays

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Synthesis and Structure Properties of Free-Standing TiO2 Nan...

2012 China Functional Materials Technology and Industry Forum

作者： Juan Chen Chen-guang Yang Hong-wang Zhang Hao Zeng Shu-li He Department of Physics Capital Normal University Department of Physics University at Buffalo

tio nanotube arrays were made on the titanium foil by the method of anodic oxidation. Large-area crystallized free-standing tio nanotube arrays were fabricated by a two-step anodization, and then crystallized by different heat-treatment processes.The morphology and structure of the tio nanotube arrays were characterized by scanning electron microscope(SEM) and X-ray diffraction (XRD).The results show that the diameter of the tio nanotube at the voltage range of 50V～65 V was about 100nm.Anatase phase is the unique phase observed in free-standing tio arrays annealed at the temperature of 400℃10℃.However,crystallographic orientation of anatase phase is influenced by the annealing temperature.

关键词： Anodic oxidation tio2 nanotube arrays Crystal structure

Photocatalytic decompositions of gaseous HCHO and methylene blue with highly ordered tio_2 nanotube arrays

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Journal of Energy Chemistry 2016年第4期25卷 740-746页

作者： Lixia Li Jing Ya Fengjiao Hu Zhifeng Liu Lei E School of Materials Science and Engineering Tianjin Chengjian University Automotive Interior Trim Tooling Center Beijing Research Institute of Mechanical & Electrical Technology

The highly ordered tio2 nanotubes (NTs) were fabricated by the anodic oxidation method. Their morphology, structure and crystalline phase were characterized by scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The effects of morphology, specific surface area, pore structures and photo catalytic activity of the tio2 NTs were investigated. UV-vis spectra analysis showed that its light absorption had been extended to the visible light range. The photocatalytic activity of the as-prepared samples was evaluated by photocatalytic oxidation of gaseous HCHO and MB aqueous solution. The samples had better adhesion strength in the dark and showed a higher photocatalytic activity than nanoparticles. Especially, with ultraviolet light pretreatment, the nanotubes exhibited more stable active for photocatalytic decomposition and the photodecomposition rate remained at high level after 3 cycles of the photocatalysis experiment. Thus, how the number of surface active group center dot OH increased and the mechanism for the great improvement for the photocatalytic activity are discussed. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： tio2 nanotube arrays Photocatalysis Visible light Ultraviolet light pretreatment

Nonsolvent-induced phase separation-derived tio_(2) nanotube arrays/porous Ti electrode as high-energy-density anode for lithium-ion batteries

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Rare Metals 2021年第2期40卷 393-399页

作者： Zhi-Jia Zhang Jun Zhao Zhi-Jun Qiao Jia-Min Wang Shi-Hao Sun Wen-Xing Fu Xi-Yuan Zhang Zhen-Yang Yu Yu-Hai Dou Jian-Li Kang Ding Yuan Yue-Zhan Feng Jian-Min Ma State Key Laboratory of Separation Membrane and Membrane Processes Tianjin Municipal Key Laboratory of Advanced Fibers and Energy StorageSchool of Materials Science and EngineeringSchool of Mechanical EngineeringTiangong UniversityTianjin300387China Centre for Clean Environment and Energy Gold Coast CampusGriffith UniversityGold Coast4222Australia Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou450002China Key Laboratory for Micro-/Nano-Optoelectronic Devices Ministry of EducationSchool of Physics and ElectronicsHunan UniversityChangsha410022China

tio_(2) nanotube arrays,growing on three-dimensional(3 D)porous Ti membrane,were synthesized using a facile nonsolvent-induced phase separation and anodization process.The length of those three-dimensional nanotube arrays could be tuned by prolonging the anodizing time.When the anodizing time is 8 h,the three-dimensional tio_(2) nanotube arrays/porous Ti electrode exhibits well cycling stability and ultra-high specific capacity,which is used in lithium-ion batteries,attributed to the high utilization rate of the substrate and the high growth intensity of the active materials.Three-dimensional tio_(2) nano tube arrays/porous Ti electrode,at 100μA·cm^(-2) with 8 h anodizing time,shows a typical discharge plateau at 1.78 V and exhibits the specific capacity with 2126.7μAh·cm^(-2),The novel nanotube arrays@3 D porous architecture effectively shortens the electron/ion transmission path,which could pave way for optimizing the design of highperformance anode materials for next-generation energy storage system.

关键词： tio2 nanotube arrays Nonsolvent-induced phase separation Anodization Anode Lithium-ion battery

Effects of Photo Electro Catalytic Conditions on Reduction of Cr(Ⅵ) over tio2 nanotube arrays

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Effects of Photo Electro Catalytic Conditions on Reduction o...

2012年全国冶金物理化学学术会议

作者：颜欣刘中清李丹丹刘旭 School of Chemical Engineering Sichuan University

Photo electro catalytic reduction of Cr(Ⅵ) in aqueous solution were carried out,using tio nanotube arrays as a photo anode.Effects of initial concentration of Cr(Ⅵ),pH value,applied voltage,dissolved oxygen and co-degradation with methylene blue on catalytic activity were investigated.Visible light spectrophotometer and atomic absorption spectrometry(AAS) were used to analyze chromium concentration.It was found that with increasing initial concentrations of Cr(Ⅵ),Cr(Ⅵ) reduction rate was decreased. The optimal pH is 2.0,applied voltage was 1.0 V.Dissolved oxygen showed a slightly negative effect.After the photo electro catalytic reduction,the product was confirmed as Cr(Ⅲ) in the aqueous solutions by X-ray photoelectron spectroscopy(XPS).For co-degradation of Cr(Ⅵ) and methylene blue,reduction rate of Cr(Ⅵ) was increased significantly as compared to its single reduction by photo electro catalysis.

关键词： tio2 nanotube arrays photo electro catalysis Cr（Ⅵ）reduction Co-degradation

Preparation and Photoelectrochemical properties of tio2 nanotube arrays modified with nano-scaled CdSe

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Preparation and Photoelectrochemical properties of TiO2 nano...

2012 China Functional Materials Technology and Industry Forum

作者： Jia-qin Liu Yan Wang Guang-qing Xu Hong-mei Zheng Rong-jun Pan Yu-cheng Wu Laboratory of Functional Nanomaterials and Devices College of Material Science and EngineeringHefei University of Technology

Highly ordered tio nanotube arrays(TNTAs) with smooth walls and uniform diameter were prepared by electrochemical anodization.And then solution deposition process was adopted for the modification of the TNTAs with nano-scaled CdSe.The materials obtained were characterized by field emission scanning electron microscopy,UV-visible spectroscopic and photoelectrochemical techniques.The results revealed that the morphologies and growth mechanism for CdSe/TNTAs composites varied with the reaction time in Se solutions(c= 1.2 mol/L) when nanotubes were firstly imported with Cd ions.Optical absorption behavior of the CdSe/TNTAs composites increased with more CdSe nanoparticles.And the photo-response of the obtained nanomaterials was first strengthened and then declined with the sustained increase of the deposited CdSe.

关键词： CdSe tio2 nanotube arrays Solution deposition

Electrochemical Preparation and Photoelectric Properties of Cu_2O-loaded tio_2 nanotube arrays

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Journal of Wuhan University of Technology(Materials Science) 2014年第1期29卷 23-28页

作者：李光亮梁伟 XUE Jinbo LIU Yiming LIANG Xingzhong College of Materials Science and Engineering Taiyuan University of Technology

tio2 nanotube （TNT） arrays were fabricated by anodic oxidation of titanium foil in a fluoride- based solution, on which Cu20 particles were loaded via galvanostatic pulse electrodeposition in cupric acetate solutions in the absence of any other additives. The structure and optical properties of Cu2O-loaded tio2 nanotube arrays （Cu2O-TNTs） were analyzed by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and UV-Vis absorption, and the photoelectrochemical performance was measured using an electrochemical work station with a three-electrode configuration. The results show that the Cu2O particles distribute uniformly on the highly ordered anatase tio2 nanotube arrays. The morphologies of Cu2O crystals change from branched, truncated octahedrons to dispersive single octahedrons with increasing deposition current densities. The Cu2O- TNTs exhibited remarkable visible light responses with obvious visible light absorption and greatly enhanced visible light photoelectrochemical performance. The I-V characteristics under visible light irradiation show a distinct plateau in the region between approximately -0.3 and 0 V, resulting in higher open-circuit voltages and larger short-circuit currents with increased Cu2O deposition.

关键词： tio2 nanotube arrays Cu2O crystals anode oxidation electrodeposition photocurrent

Efficient Photoelectrochemical Water Splitting by g-C_3N_4/tio_2 nanotube Array Heterostructures

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Nano-Micro Letters 2018年第2期10卷 247-259页

作者： Changhai Liu Fang Wang Jin Zhang Ke Wang Yangyang Qiu Qian Liang Zhidong Chen School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University School of Petrochemical Engineering Changzhou University

Well-ordered tio_2 nanotube arrays(TNTAs)decorated with graphitic carbon nitride(g-C_3N_4) were fabricated by anodic oxidization and calcination process.First, TNTAs were prepared via the anodic oxidation of Ti foil in glycerol solution containing fluorinion and 20%deionized water. Subsequently, g-C_3N_4 film was hydrothermally grown on TNTAs via the hydrogen-bonded cyanuric acid melamine supramolecular complex. The results showed that g-C_3N_4 was successfully decorated on the TNTAs and the g-C_3N_4/TNTAs served as an efficient and stable photoanode for photoelectrochemical water splitting. The facile deposition method enables the fabrication of efficient and low-cost photoanodes for renewable energy applications.

关键词： tio2 nanotube arrays Graphitic carbon nitride（g-C3N4） Heterojunction Photoelectrochemical Water splitting