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Effect of oxygen terminated surface of boron-doped diamond thin-film electrode on seawater salinity sensing

Journal of Materials Science & Technology 2021年第27期86卷 1-10页

作者： Dan Shi Lusheng Liu Zhaofeng Zhai Bin Chen Zhigang Lu Chuyan Zhang Ziyao Yuan Meiqi Zhou Bing Yang Nan Huang Xin jiang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Institute of Materials Engineering University of SiegenPaul-Bonatz-Str.9-11Siegen57076Germany

Tremendous demands for highly sensitive and stable seawater salinometers have motivated intensive research on advanced electrode ***-doped diamond(BDD)is attractive in terms of its high mechanical stability and chemical inertness,but is usually hindered by its low double-layer capacitance(C_(dl))for seawater salinity ***,inspired by the principle of oxygen-terminated BDD electrode endowing higher C_(dl)than hydrogen-terminated surface,we introduce the oxygen terminated surface by oxygen plasma or reactive ion etch(RIE),and the fabricated oxygen terminated BDD electrodes demonstrate high sensitivity and long-term stability in seawater salinity detection comparing with the hydrogen terminated BDD ***,the as-fabricated O-BDD-RIE electrodes not only show remarkable enhanced response even better than the commercial platinum black electrodes but also display long-time stability which is weekly verified by continuous monitor for 90 *** outstanding performance of the oxygen terminated BDD electrodes can be ascribed to the enhancement of C-O surface functional group on C_(dl).In addition,a comprehensive analysis of effective electroactive surface area(EASA)and C_(dl)proves that the surface oxygen is the major factor for the improved C_(dl).In summary,the excellent oxygen terminated BDD electrodes promise potential application in seawater salinity detection.

关键词： boron-doped diamond Capacitance Oxygen plasma Reactive ion etch Seawater salinity

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Integration of 3D interconnected porous microstructure and high electrochemical property for boron-doped diamond by facile strategy

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Journal of Materials Science & Technology 2022年第10期105卷 26-35页

作者： Zhigang Lu Nan Huang Zhaofeng Zhai Bin Chen Lusheng Liu Haozhe Song Ziyao Yuan Chuyan Zhang Bing Yang Xin Jiang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Institute of Materials Engineering University of SiegenNo.9-11 Paul-Bonatz-Str.Siegen 57076Germany

Three-dimensional(3D)porous boron-doped diamond(BDD)flm is an attractive electrode material but tough to ***,the 3D porous BDD flms were constructed in a facile and template-free *** BDD/non-diamond carbon(NDC)composite flms were frstly fabricated by hot flament chemical vapor deposition(HFCVD)technique,and then the porous BDD flms with 3D interconnected porous microstructure,different pore size and NDC-free diamond were achieved by selective removal of *** is manifested that higher electrochemical response,large double layer capacitance(17.54 m F/cm^(2))in diamond electrodes,wide electrochemical window of 2.6 V and superior long-term stability were achieved for 3D porous BDD *** derives from the synergistic effect of microstructure and phase composition of the porous flms.3D interconnected structure possesses prominent improvement of effective surface area and accessible porous channel,signifcantly enhancing the species adsorption and mass ***3D porous BDD flms,composed of NDC-free diamond,exhibit excellent structural stability and corrosion resistance,which favor the enhancement of long-term stability and water splitting *** facile fabricating approach and excellent structure/electrochemical character demonstrate the appealing application in many electrochemical felds for 3D porous BDD flms,such as energy storage and conversion,wastewater treatment and purifcation.

关键词： boron-doped diamond 3D porous Composite Electrochemistry

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Electrochemical incineration of dimethyl phthalate by anodic oxidation with boron-doped diamond electrode

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Journal of Environmental Sciences 2009年第10期21卷 1321-1328页

作者： HOU Yining QU Jiuhui ZHAO Xu LIU Huijuan State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The anodic oxidation of aqueous solutions containing dimethyl phthalate （DMP） up to 125 mg/L with sodium sulfate （Na2SO4） as supporting electrolyte within the pH range 2.0-10.0 was studied using a one-compartment batch reactor employing a boron-doped diamond （BDD） as anode. Electrolyses were carded out at constant current density （1.5-4.5 mA/cm^2）. Complete mineralization was always achieved owing to the great concentration of hydroxyl radical （-OH） generated at the BDD surface. The effects of pH, apparent current density and initial DMP concentration on the degradation rate of DMP, the specific charge required for its total mineralization and mineralization current efficiency were investigated systematically. The mineralization rate of DMP was found to be pH-independent and to increase with increasing applied current density. Results indicated that this electrochemical process was subjected, at least partially, to the mass transfer of organics onto the BDD surface. Kinetic analysis of the temporal change of DMP concentration during electrolysis determined by High Performance Liquid Chromatography （HPLC） revealed that DMP decay under all tested conditions followed a pseudo first-order reaction. Aromatic intermediates and generated carboxylic acids were identified by Gas Chromatography- Mass Spectrometry （GC-MS） and a general pathway for the electrochemical incineration of DMP on BDD was proposed.

关键词： dimethyl phthalate anodic oxidation boron-doped diamond mineralization

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Electrochemical treatment of wastewater containing chlorophenols using boron-doped diamond film electrodes

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Journal of Central South University 2012年第7期19卷 1946-1952页

作者：王建功李学敏 Key Laboratory of Environmental Protection in Water Transport Engineering of Ministry of Communications(Tianjin Research Institute of Water Transport Engineering) Department of Precision Instruments and Mechanology Tsinghua University

The electrochemical treatment of wastewater containing chlorophenols （2-monochlorophenol, 4-monochlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol） was carried out experimentally with synthetic boron-d0ped diamond （BDD） thin film electrodes. Current vs time curves under different cell voltages were measured. Removal rate of COD, instant current efficiency （ICE） and energy consumption were investigated under different current densities. The influence of supporting media is reported, which plays an important role in determining the global oxidation rate. The oxidative chloride is stronger than peroxodisulphate. The electrochemical characteristics of boron-doped diamond electrodes were investigated in comparison with active coating Ti substrate anode （ACT）. The experimental results show that BDD is markedly superior to ACT due to its different absorption properties.

关键词： boron-doped diamond electrochemical treatment chlorophenol wastewater

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Electrochemical oxidation of reactive brilliant orange X-GN dye on boron-doped diamond anode

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Journal of Central South University 2018年第8期25卷 1825-1835页

作者： MA Li ZHANG Ming-quan ZHU Cheng-wu MEI Rui-qiong WEI Qiu-ping ZHOU Bo YU Zhi-ming State Key Laboratory of Powder Metallurgy School of Materials Science and EngineeringCentral South University School of Engineering and Materials Science Queen MaryUniversity of London

In this study,the electrochemical oxidation of reactive brilliant orange X-GN dye with a boron-doped diamond(BDD)anode was *** BDD electrodes were deposited on the niobium(Nb)substrates by the hot filament chemical vapor deposition *** effects of processing parameters,such as film thickness,current density,supporting electrolyte concentration,initial solution pH,solution temperature,and initial dye concentration,were evaluated following the variation in the degradation *** microstructure and the electrochemical property of BDD were characterized by scanning electron microscopy,Raman spectroscopy,and electrochemical workstation;and the degradation of X-GN was estimated using UV-Vis ***,the results indicated that the film thickness of BDD had a significant impact on the electrolysis of *** 3 h of treatment,100%color and 63.2%total organic carbon removal was achieved under optimized experimental conditions:current density of 100 mA/cm2,supporting electrolyte concentration of 0.05 mol/L,initial solution pH 3.08,and solution temperature of 60°C.

关键词： reactive brilliant orange X-GN boron-doped diamond film thickness electrochemical oxidation

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Determination of band alignment between GaO_(x)and boron doped diamond for a selective-area-doped termination structure

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Chinese Physics B 2022年第8期31卷 670-674页

作者： Qi-Liang Wang Shi-Yang Fu Si-Han He Hai-Bo Zhang Shao-Heng Cheng Liu-An Li Hong-Dong Li State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130012China Shenzhen Research Institute Jilin UniversityShenzhen 518057China Guangdong Juxin New Material Technology Co. LtdZhuhai 519000China

An n-GaO_(x)thin film is deposited on a single-crystal boron-doped diamond by RF magnetron sputtering to form the pn *** n-Ga Ox thin film presents a small surface roughness and a large optical band gap of 4.85 e *** addition,the band alignment is measured using x-ray photoelectron spectroscopy to evaluate the heterojunction *** GaO_(x)/diamond heterojunction shows a type-Ⅱstaggered band configuration,where the valence and conduction band offsets are 1.28 e V and 1.93 e V,*** results confirm the feasibility of the use of n-GaO_(x)as a termination structure for diamond power devices.

关键词： GaO_(x) boron-doped diamond edge termination band alignment

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Electricity-driven ammonia oxidation and acetate production in microbial electrosynthesis systems

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Frontiers of Environmental Science & Engineering 2022年第4期16卷 27-36页

作者： Qinjun Liang Yu Gao Zhigang Li Jiayi Cai Na Chu Wen Hao Yong Jiang Raymond Jianxiong Zeng Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Microbial electrosynthesis(MES)is an emerging technology for producing chemicals,and coupling MES to anodic waste oxidation can simultaneously increase the competitiveness and allow additional functions to be *** this study,MES was used for the simultaneous removal of ammonia from synthetic urine and production of acetate from CO_(2).Using graphite anode,83.2%±5.3%ammonia removal and 28.4%±9.9%total nitrogen removal was achieved,with an energy consumption of 1.32 kWh/g N for total nitrogen removal,0.45 kWh/g N for ammonia nitrogen removal,and 0.044 kWh/g for acetate *** boron-doped diamond(BDD)anode,70.9%±12.1%ammonia removal and 51.5%±11.8%total nitrogen removal was obtained,with an energy consumption of 0.84 kWh/g N for total nitrogen removal,0.61 kWh/g N for ammonia nitrogen removal,and 0.043 kWh/g for acetate production.A difference in nitrate accumulation explained the difference of total nitrogen removal *** of ammonia and acetate across the membrane deteriorated the performance of *** results are important for the development of novel elcctricity-driven technologies for chemical production and pollution removal.

关键词： Biocathode Carbon dioxide Electrochemical oxidation Graphite anode boron-doped diamond

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Effects of additive boron on HPHT diamond single crystals grown by TGM

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Science China(Physics,Mechanics & Astronomy) 2011年第12期54卷 2186-2190页

作者： XIAO HongYu QIN YuKun LI ShangSheng LIANG ZhongZhu MA HongAn JIA XiaPeng Department of Mathematics and Physics Luoyang Institute of Science and Technology Luoyang 471023 China Henan Polytechnic University Jiaozuo 454000 China State Key Laboratory of Applied Optics Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China National Lab of Superhard Materials Jilin University Changchun 130012 China

In this work, under pressure 5.4 GPa and temperature 1250-1400°C, large gem-diamond single crystals with perfect shape and different content of additive boron were synthesized using temperature gradient method. High-purity boron powders were added as boron source into the graphite powder, and the effects of additive boron on crystal growth habit were investigated in detail. The relationship between the growth rate and the amount of additive boron was studied. The scanning electron microscopy was employed to study the morphology of boron-doped diamond crystals. Raman spectroscopy and Hall measurements were used to investigate the crystal structures and the carrier concentration, respectively. The results show that with the increase of the content of boron added into graphite powder, the crystal growth rate and the carrier concentration increase firstly, and decrease afterwards, and the zone-center phonon line at 1332 cm 1 has small shift to lower energy. The defects occur on the crystal surface when excessive boron is added in the synthesis system.

关键词： HPHT boron-doped diamond catalyst carrier concentration

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Schottky photodiode using submicron thick diamond epilayer for flame sensing

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Nano-Micro Letters 2009年第1期1卷 30-33页

作者： Y.Koide M.Y.Liao J.Alvarez M.Imura K.Sueishi F.Yoshifusa Sensor Materials Center (SenMC) National Institute for Materials Science (NIMS) Laboratoire de Génie Electrique de Paris (UMR 8507 CNRS) Ecole Supérieure d’Electricité Universités Paris VI et Paris XI International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) ANTEC Co.

The sensing of a flame can be performed by using wide-bandgap semiconductors, which offer a high signal-to-noise ratio since they only response the ultraviolet emission in the flame. diamond is a robust semiconductor with a wide-bandgap of 5.5 e V, exhibiting an intrinsic solar-blindness for deep-ultraviolet(DUV) detection. In this work, by using a submicron thick boron-doped diamond epilayer grown on a type-Ib diamond substrate, a Schottky photodiode device structure- based flame sensor is demonstrated. The photodiode exhibits extremely low dark current in both forward and reverse modes due to the holes depletion in the epilayer. The photodiode has a photoconductivity gain larger than 100 and a threshold wavelength of 330 nm in the forward bias mode. CO and OH emission bands with wavelengths shorter than 330 nm in a flame light are detected at a forward voltage of-10 V. An alcohol lamp flame in the distance of 250 mm is directly detected without a focusing lens of flame light.

关键词： Flame sensing boron-doped diamond Schottky photodiode

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