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Synthesis of boron-doped Diamond/Porous Ti Composite Materials——Effect of Carbon Concentration

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Journal of Wuhan University of Technology(Materials Science) 2012年第2期27卷 328-332页

作者：马明 CHANG Ming 李晓伟 School of Electronics Information Engineering Tianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Film Electronic and Communication Devices Tianjin 300384China

Highly boron-doped diamond films were deposited on porous titanium substrates by hot filament chemical vapor deposition technique. The morphology variation of highly boron-doped diamond films grown on porous titanium substrates was investigated, and the effects of carbon concentration on nucleation density and diamond growth were also studied. The continuous change of surface morphology and structure of diamond film were characterized by scanning electron microscopy. The structures of diamond film and interlayer were analyzed by X-ray diffraction. The quality of boron-doped diamond film was confirmed by visible Raman spectroscopy. The experimental results reveal that surface morphology and quality of boron-doped diamond films are various due to the change of carbon concentration. The thickness of intermediate layer decreases with the carbon concentration increasing.

关键词： boron-doped diamond film porous titanium carbon concentration

Electrochemical reduction of CO_2 and degradation of KHP on boron-doped diamond electrodes in a simultaneous and enhanced process

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Chinese Chemical Letters 2019年第2期30卷 509-512页

作者： Daibing Luo Shanhu Liu Kazuya Nakata Akira Fujishima Analytical ξ Testing Center Sichuan University Research Institute for Science and Technology Photocatalysis International Research Center Tokyo University of Science Henan Key Laboratory of Polyxometalate Chemistry Institute of Molecular and Crystal Engineering College of Chemistry and Chemical EngineeringHenan University

In this research a novel electrochemical system using dual boron-doped diamond (BDD) electrodes as the anode and cathode, for the first time, has been developed for CO_2 conversion and wastewater treatment in a synergetic and simultaneous process. On the BDD cathode CO_2 is converted into formaldehyde while in the anodic side organic wastes are decomposed on the BDD anode. Interestingly, when potassium hydrogen phthalate (KHP) was used as the organic model to be degraded in the anodic side, a higher efficiency of formaldehyde generation from CO_2 was observed on the BDD cathode. The enhanced effect of formaldehyde formation in the presence of KHP oxidation suggests that this novel electrochemical system can combine conversion of CO_2 to the form of high-value chemicals and wastewater purification in a simultaneous and harmonious process.

关键词： CO2 Wlectrochemical reduction boron-doped diamond Wastewater treatment Formaldehyde

Electroanalytical Investigation on Paracetamol on boron-doped Diamond Electrode by Voltammetry

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American Journal of Analytical Chemistry 2019年第11期10卷 562-578页

作者： Koffi Konan Martin Lassine Ouattara Laboratoire de Chimie Physique UFR SSMT Université Félix Houphou&euml t-Boigny de Cocody Abidjan C&ocirc te d’Ivoire

An electroanalytical method was developed for the direct quantitative determination of paracetamol in tablets based on its oxidation behavior. The electrochemical oxidation and determination of paracetamol were easily carried out on born-doped diamond (BDD) electrode using two voltammetric techniques (CV and DPV). The electrochemical measurements performed by cyclic voltammetric (CV) and differential pulse voltammetry (DPV) techniques were carried out using a cathodically pretreated boron-doped diamond electrode in HClO4 and KClO4 electrolytes. HClO4 was then selected for analytical purposes and scan rate studies were also completed. The oxidation of the paracetamol is found to be irreversible and a diffusion-controlled nature of the paracetamol oxidation peak was established. A linear calibration curve for DPV analysis was constructed in the paracetamol concentration range from 0 μM to 13.87 μM, with 0.16 μM and 0.55 μM as the detection and quantification limit respectively.

关键词： Electroanalytical Method boron-doped Diamond Electrode Voltammetry Paracetamol

First Principles Calculations of Hydrogen Storage on Calcium-Decorated, boron-doped Bilayer Graphene

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Journal of Materials Science and Chemical Engineering 2018年第11期6卷 1-12页

作者： Xiaojing Zhu Shanghai University of Engineering Science Shanghai China

In this paper, the adsorption and storage of hydrogen on calcium-decorated, boron-doped bilayer graphene was investigated using first principles calculation. The calcium-decorated bilayer graphene was investigated and it was shown that the binding energy of H2 molecule adsorbed on the calcium-decorated bilayer graphene is −0.02 eV and the energy does not belong to reversible usage range of −0.2 - −0.6 eV. Substitutional boron doping can improve the adsorption energy of Ca to bilayer graphene with the empty pz orbital of boron atoms. Our calculations show that calcium atoms can be solidly adsorbed on the interlayer (Ca/B/Graphene) and outerlayer (2Ca/B/Graphene and 3Ca/B/Graphene) of B-doped bilayer graphene. Hydrogen molecule binds with Ca/B/Graphene, 2Ca/B/Graphene and 3Ca/B/Graphene system with an energy that belongs to reversible usage range of −0.2 - −0.6 eV. The overlap between Ca 3d and H2σ orbitals just below the Fermi energy demonstrates the charge transfer between the Ca atom and the H atom and the role of hybridization of the 3d orbita of Ca with the σ orbitals of H2 in efficient adsorption of hydrogen molecules. The charge from hydrogen bonding orbital transfers to empty 3d orbitals of the Ca atom, and then from the 3d orbitals of the Ca atom donated to H2σ* antibonding orbital. Hydrogen moleculars can be adsorbed on the interlayer and outerlayer of Ca-decorated B-doped bilayer graphene.

关键词： Hydrogen Storage Calcium-Decorated boron-doped Bilayer Graphene Interlayer Outerlayer

Analytical Determination of Benzophenone-3 in Sunscreen Preparations Using boron-doped Diamond Electrodes

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American Journal of Analytical Chemistry 2011年第3期2卷 383-391页

作者： Michelli Thomaz Laranjeira Fabio de Lima Silvio Cesar de Oliveira Valdir Souza Ferreira Robson Tadeu Soares de Oliveira 不详

A new electroanalytical procedure was developed for the determination of Benzophenone-3 (BENZO) in commercial sunscreen as the active ingredient. The procedure is based on the use of electrochemical methods as cyclic and square-wave voltammetry, with boron-doped diamond (BDD) electrodes. The reduction of BENZO in Britton-Robinson buffer (0.1 mol●L–1) using this type of electrode gives rise to one irreversible peak in –1.30 V (versus Ag/AgCl) in presence of cationic surfactant cetyltrimethylammonium bromide (CTABr). The proposed electrochemical method was successfully applied to the analysis of commercially available pharmaceutical preparations.

关键词： boron-doped Diamond Benzophenone-3 BENZO and Square-Wave Voltammetry

Effect of boron species on carbon surface on oxidative dehydrogenation of propane

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Chinese Journal of Chemical Engineering 2023年第10期62卷 310-317页

作者： Tingcong Wang Mingyuan Zhu Department College of Chemistry and Chemical Engineering Yantai UniversityYantai 264005China

Carbon catalysts for propane oxidative dehydrogenation(PODH)can potentially replace metal oxide catalysts due to their environmental friendliness(greenness)and excellent catalytic performance.Biomass carbon materials have the advantages of being abundant in variety,inexpensive,and easily available,but their catalytic selectivity is relatively poor in PODH.Therefore,we report here on a boron-doped sisal fiber carbon catalyst,which showed excellent selectivity of propylene in PODH,excluding the effect of surface-covered B2O3 on the catalytic performance by hot water washing.The carbon material exhibited the best catalytic performance with a load of 2%(mass)and a calcination temperature of 1100℃.At a reaction temperature of 400℃,the conversion rate of propane was 2.0%,and the selectivity toward propylene reached 88.6%.The new chemical bonds formed by boron on the surface of the carbon materials had an important effect on the catalytic performance,as determined by XPS characterization.The BAO groups affected the catalytic activity by inhibiting the generation of electrophilic oxygen species,while the BAC content improved the selectivity toward propylene by changing the electron cloud density.

关键词： boron-doped Oxidative dehydrogenation Propane Selectivity

A Rapid Separation and Highly Determination of Paraben Species by Ultra-Performance Liquid Chromatography —Electrochemical Detection

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Detection 2013年第2期1卷 21-29页

作者： Maneenuch Chuto Sudkate Chaiyo Weena Siangproh Orawon Chailapakul Department of Chemistry Faculty of Science Chulalongkorn University Bangkok Thailand Department of Chemistry Faculty of Science Srinakharinwirot University Bangkok Thailand Department of Chemistry Faculty of Science Srinakharinwirot University Bangkok Thailand Center of Excellence for Petroleum Petrochemicals and Advanced Materials Chulalongkorn University Bangkok Thailand Electrochemistry and Optical Spectroscopy Research Unit Department of Chemistry Faculty of Science Chulalongkorn University Bangkok Thailand.

In this study, a new technique was developed using rapid ultra-performance liquid chromatography (UPLC)-based separation coupled with electrochemical detection by a boron-doped diamond (BDD) electrode for the detection and quantification of three commonly used parabens (methylparaben (MP), ethylparaben (EP) and propylparaben (PP)). We aimed to reduce the analysis time by using UPLC coupled with a short reverse phase C 18 monolithic column (25 mm×4.6 mm). Operating the monolithic column at low back-pressure resulted in high flow rates. A mobile phaseconsisting of a 25:75 (v/v) ratio of acetonitrile:0.05 Mphosphate buffer (pH 5) at a flow rate of 2.5 mL·min?1 was used to perform the separation. The amperometric detection with the BDD electrode was found to be optimal and reliably reproducible at a detection potential of 1.5 V vs. Ag/AgCl. Under these conditions, the separation of the three targetanalytes (MP, EP and PP) was achieved in 2 min and was linear within a sample concentration range of 0.1 to 50.0 mg·L?1 (r2 values of 0.9970, 0.9994 and 0.9994 for MP, EP and PP, respectively). This method was successfully applied to determine the concentrations of each parabeninsix real samples with therecoveries ranging from of 80.3% - 98.9% for all three parabensfrom samples spiked at 12, 22 and 32 mg·L?1. Therefore, the proposed method can be used as an alternative rapid and selective method for the determination of paraben levels in real samples.

关键词： Parabens Ultra-Performance Liquid Chromatography boron-doped Diamond Electrode