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Journal of Materials Science & Technology 2016年第11期32卷 1171-1178页

作者： huan Zhong Yuejun Ouyang Gang Yu bonian hu Dalong Yan State Key Laboratory of Chemo/Biosensing and Chemometrics. College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China huaihua Key Laboratory of Functional Inorganic & Polymeric Materials Huaihua University Huaihua 418000 China Department of Materials and Chemical Engineering Hunan Institute of Technology Hengyang 421008 China

Core-shell structured cobalt coated tungsten carbide（WC/Co） composite powders were prepared by intermittent electrodeposition. The influence of process parameters such as current density, single deposition pulse, p H value and surfactants on the formation of WC/Co was investigated and characterized by scanning electron microscopy（SEM）, electrochemical station, acidometer and X-ray diffraction（XRD） *** composite powders with 54% cobalt content were fabricated at a current density of 16 A dm-2, with a load of 10 g dm-3WC powders and a stirring speed of 600 r min-1at an operation temperature of 40 ± 2 °C,and 90% current efficiency was obtained with a single deposition pulse of 1.5 min and single stirring pulse of 2 min during 12 min efficient electrodeposition time. The uniformly distributed WC/Co powders could be obtained in the cobalt electrolyte containing 300 mg dm-3PEG-2000. The spherical cobalt grains coated WC particles were prepared in the p H 4-5 electrolyte at the Co deposition rate of 0.58 g min-1. A practical process for high efficient production of WC/Co powders by electrodeposition was developed in the present work.

关键词： Composite powder Electrodeposition Dispersion Crystal structure

Effect of activators on the properties of nickel coated diamond composite powders

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Journal of Materials Science & Technology 2017年第11期33卷 1409-1415页

作者： Zongshi Zuo bonian hu Hong Chen Qizhi Dong Gang Yu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Department of Materials and Chemical Engineering Hunan Institute of Technology School of Materials Science and Energy Engineering Foshan University

Nickel coated diamond composite powders were fabricated via a newly developed direct electrodeposition technique. The effects of activators on the coating of diamond were firstly investigated and diamond grinding wheels were then prepared from Ni-coated diamond composite powders with different activators. The microstructural characterizations of this composite powders were finally conducted by scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction, and the mechanical and tribological properties of as-prepared diamond grinding wheels were also measured. There are changes in microstructures and properties of the composite powders with activators. The activator concentration also has an influence on the morphologies and phase structures of the Ni coating on diamond *** composite powders with more compact coating of nickel can be prepared by adding 1 g dm^（-3） or more AgNO_3 as an activator to electrodeposit nickel on diamond. The mechanical and tribological properties of diamond grinding wheels were significantly improved when the coating phase structure of Ni crystal grew with（111） plane orientation on the surface of diamond particles. The wheels made from nickel coated diamond composite powders possessed the advantages of easy preparation and outstanding tribological properties. Therefore, Ni coated diamond composite powders exhibit a great potential to be extensively applied in diamond cutting and grinding tools.

关键词： Composite powders Nickel coated diamond Activator Direct electrodeposition Phase structure Tribological property

Controllable phase transformation and improved thermal stability of nickel on tungsten substrate by electrodeposition

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Journal of Materials Science & Technology 2019年第5期35卷 727-732页

作者： Minjie Xu Chao hu Haiyan Xiang Haozi Lu Travis Shihao hu bonian hu Song Liu Gang Yu Institute of Chemical Biology and Nanomedicine (ICBN) State Key Laboratory of Chemical/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan UniversityChangsha410082China Department of Mechanical Engineering California State University Los AngelesCA90032USA Department of Materials and Chemical Engineering Hunan Institute of Technology Hunan Hengyang 421002 China

Present study reports a controllable phase transformation of nickel(Ni) from amorphous to cubic crystal structures on tungsten(W) substrate by electrodeposition. X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy were used to characterize the microstructure, micro-constituents and surface morphology of as-prepared Ni. The microstructure of Ni was strongly affected by the applied overpotential and deposition time. It is demonstrated that by controlling these two parameters either amorphous or cubic crystal structure of Ni on the W substrate could be obtained. The crystallization mechanism is discussed based on Gibbs crystal growth theory and Ostwald’s rule. It is concluded that W substrate, acting as a heat sink, can effectively promote the thermal stability of amorphous Ni, based on the data from differential scanning calorimetry and Kissinger’s model. This work contributes to the elucidation of the crystallization mechanism of Ni on W powder substrates, and proves that, better than alloying with other elements, incorporating powder substrates will significantly improve the crystallization temperature, hence the thermostability of amorphous Ni.

关键词： Phase transformation Amorphous Ni Electrodeposition Electrocrystallization Thermal stability

Effect of iron ion configurations on Ni^(2+) removal in electrocoagulation

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Journal of Environmental Sciences 2023年第2期124卷 823-834页

作者： Xiaoliu Lü Tao Xu Yihui Zhou Qingjuan Peng Jinhua Ou bonian hu Zhihui Xie Xiping Lei Gang Yu College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082China Research Institute of New Building Materials Hunan Institute of TechnologyHengyang 421008China Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China hunan Zihong Ecology Technology Co. Ltd.Changsha 410000China

Electrocoagulation(EC)has been widely used to treat the heavymetal wastewater in industry.A novel process of sinusoidal alternating current electrocoagulation(SACC)is adopted to remove Ni2+in wastewater in this *** morphology of precipitates and the distribution of the main functional iron configurations were *** timed complex spectroscopy can identify the monomeric iron configurations[Fe(a)],oligomeric iron configurations[Fe(b)]and polymeric iron configurations[Fe(c)].The optimal operating conditions of SACC process were determined through single-factor *** maximum Ni2+removal efficiency[Re(Ni^(2+))]was achieved under the conditions of pH0=7,current density(j)=7 A/m^(2),electrolysis time(t)=25 min,c0(Ni^(2+))=100 mg/*** pH=7,the proportion of Fe(b)and Fe(c)in the system was 50.4 at.% and 23.1 at.%,*** the SACC process,Fe(b)and Fe(c)are themain iron configurations in solution,while Fe(c)are the vastmajority of the iron configurations in the direct current electrocoagulation(DCC)***(Ni2+)is 99.56% for SACC and 98.75% for DCC under the same optimum conditions,*** precipitates produced by SACC have a high proportion of Fe(b)configurations with sphericalα-FeOOH andγ-FeOOH structures which contain abundant hydroxyl ***,it is demonstrated that Fe(b)has better adsorption capacity than Fe(c)through adsorption experiments of methyl orange(MO)***(a)configurations in the homogeneous solution had no effect on the removal of nickel.

关键词： Electrocoagulation Nickel wastewater Iron configurations Alternating current Polynuclear iron-hydroxyl complex

透明MSe2@氮掺杂碳膜对电极用于钴电解质双面DSSC

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材料研究学报 2020年第9期34卷 683-690页

作者：欧金花胡波年王薇韩瑜湖南工学院材料与化学工程学院衡阳421002 大连理工大学建设工程学部大连116024 辽宁省建设科学研究院有限责任公司沈阳110005

用层层自组装法制备一种M-TCPP(M=Ni、Fe)薄膜,然后原位硒化制备出MSe2和氮掺杂碳的复合透明膜(MSe2@NCF),将其用作对电极并结合钴电解质的特点制备了双面DSSC。对MSe2@NCF的形貌、结构和电化学性能进行表征,并探讨了从正面和背面辐射D... 详细信息

用层层自组装法制备一种M-TCPP(M=Ni、Fe)薄膜,然后原位硒化制备出MSe2和氮掺杂碳的复合透明膜(MSe2@NCF),将其用作对电极并结合钴电解质的特点制备了双面DSSC。对MSe2@NCF的形貌、结构和电化学性能进行表征,并探讨了从正面和背面辐射DSSC时电池的电荷传输路线和光伏性能的区别。结果表明,NiSe2@NCF具有可与Pt相媲美的催化活性,用其组装的双面DSSC从正面辐射和背面辐射其PCE分别为8.19%和6.02%,与用Pt电极组装DSSC的PCE(8.46%和6.23%)接近。

关键词：复合材料染料敏化太阳能电池层层自组装对电极 NiSe2 FeSe2

透明Cu^2S@氮掺杂碳纳米片用于双面量子点敏化太阳能电池对电极的性能

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硅酸盐学报 2020年第10期48卷 1581-1588页

作者：欧金花胡波年周唤宇韩瑜湖南工学院材料与化学工程学院湖南衡阳421002 大连理工大学建设工程学部辽宁大连116024 辽宁省建设科学研究院有限责任公司沈阳110005

采用液相外延生长法制备了一种由铜和四羧基卟啉配位的金属–有机框架薄膜材料,以其为牺牲模板,原位合成了Cu2S和氮掺杂碳的复合透明膜(Cu2S@NCF),将其直接作双面CdS/CdSe量子点敏化太阳能电池(QDSSC)对电极,并对其进行了结构、形貌及... 详细信息

采用液相外延生长法制备了一种由铜和四羧基卟啉配位的金属–有机框架薄膜材料,以其为牺牲模板,原位合成了Cu2S和氮掺杂碳的复合透明膜(Cu2S@NCF),将其直接作双面CdS/CdSe量子点敏化太阳能电池(QDSSC)对电极,并对其进行了结构、形貌及性能研究。结果表明:Cu-(5,10,15,20-(4-羧基苯基)卟啉)(TCPP)薄膜在煅烧过程中,Cu原子在硫粉存在下转变成了Cu2S纳米颗粒,而含氮的有机连接单元TCPP原位碳化成了氮掺杂的碳。Cu2S@NCF保持了Cu-TCPP薄膜的纳米片形貌,且大量尺寸均一的Cu2S小颗粒分布于纳米片上,以其作对电极所组装的CdS/CdSe QDSSC具有优异的光伏性能,从正面辐射和背面辐射分别获得了4.16%和3.72%的光电转化效率(η),高于Pt电极组装QDSSC的η(2.39%和1.73%)。通过对循环伏安曲线、电化学阻抗谱和Tafel极化曲线分析可知,Cu2S@NCF对Sn2–离子催化还原具有传输阻抗低、扩散速率快和催化活性高等特点,以其作对电极组装的CdS/CdSe QDSSC获得了优异的光伏性能。

关键词：量子点敏化太阳能电池金属–有机框架材料对电极透明双面

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镁合金化学镀镍溶液稳定性

化工学报 2009年第3期60卷 696-701页

作者：胡波年李亭憬余刚张俊吴振军何晓梅湖南大学化学化工学院化学生物传感与计量学国家重点实验室湖南长沙410082 湖南工学院化学化工系湖南衡阳421008

为了开发出长寿命高稳定性镁合金化学镀镍溶液,通过添加硫脲、碘酸钾等稳定剂,研究了pH值、温度对镀液的稳定性能、镀速、镀层质量等因素的影响。采用称重法测定镀层的沉积速率,沉积到镀件上的镍量占溶液中消耗镍量的百分比来表示溶液... 详细信息

为了开发出长寿命高稳定性镁合金化学镀镍溶液,通过添加硫脲、碘酸钾等稳定剂,研究了pH值、温度对镀液的稳定性能、镀速、镀层质量等因素的影响。采用称重法测定镀层的沉积速率,沉积到镀件上的镍量占溶液中消耗镍量的百分比来表示溶液的稳定性,NaCl溶液浸泡实验评定镀层的覆盖度,热震实验评定镀层的结合力,极化曲线表征镀层的耐蚀性。结果表明,沉积速率随硫脲、碘酸钾浓度的增大先升高后降低,碘酸钾对镀速的影响不如硫脲显著。添加硫脲0.5 mg·dm-3时稳定常数最大值达89.25%,添加碘酸钾5 mg·dm-3时,稳定常数达82.45%。采用pH值为5.0的含硫脲的镀液,(82±1)℃施镀,获得的Ni-P镀层和镁合金基体之间没有缝隙,结合紧密,而且Ni-P镀层均匀致密。硫脲不仅能提高沉积速率,而且也催化镁合金表面,提高沉积效率。

关键词：镁合金化学镀镍稳定性硫脲碘酸钾

金属-有机框架材料在太阳能电池中的应用与挑战

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中国材料进展 2021年第8期40卷 618-625页

作者：欧金花胡波年何赛玉王薇刘进轩湖南工学院材料与化学工程学院湖南衡阳421002 大连理工大学精细化工国家重点实验室辽宁大连116024

化石能源枯竭、温室效应以及环境恶化是人类生存发展面临的巨大挑战,发展可再生能源对当代社会至关重要。第三代太阳能电池包括染料敏化太阳能电池、钙钛矿太阳能电池、有机聚合物太阳能电池等具有转化效率高、加工成本低、环境友好等特... 详细信息

化石能源枯竭、温室效应以及环境恶化是人类生存发展面临的巨大挑战,发展可再生能源对当代社会至关重要。第三代太阳能电池包括染料敏化太阳能电池、钙钛矿太阳能电池、有机聚合物太阳能电池等具有转化效率高、加工成本低、环境友好等特点,吸引了科研工作者的广泛关注。提高太阳能器件的效率和稳定性,对推动其工业化进程具有重要意义。金属-有机框架材料(metal organic framework materials,MOFs)是由金属团簇和有机单体有序排列形成的一类新型化合物,在气体储存和分离领域得到了广泛研究。近年来,MOFs因其高结晶性、高比表面积和多孔性等特点成为光伏技术领域的研究热点,用以提高器件的光电转化效率和长期稳定性。主要总结了近年来MOFs及衍生材料在染料敏化太阳能电池、钙钛矿太阳能电池、有机聚合物太阳能电池中的应用和突破性进展,并展望MOFs在光伏技术领域的应用前景。

关键词：太阳能电池金属-有机框架材料光伏技术效率稳定性

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三乙醇胺在镁合金阳极氧化中的作用

化工学报 2009年第8期60卷 2118-2123页

作者：欧爱良余刚胡波年何晓梅张俊易海波陈云湖南大学化学化工学院化学生物传感与计量学国家重点实验室湖南长沙410082 湖南工学院材料与化工系湖南衡阳421002

在由KOH、Na2SiO3、Na2B4O7和三乙醇胺等组成的电解液中,以恒电流方式对AZ91D镁合金进行阳极氧化处理,并研究了三乙醇胺浓度对AZ91D镁合金阳极氧化膜层性能的影响规律。利用电压-时间曲线,全浸腐蚀实验、动电势极化曲线和扫描电镜(SEM)... 详细信息

在由KOH、Na2SiO3、Na2B4O7和三乙醇胺等组成的电解液中,以恒电流方式对AZ91D镁合金进行阳极氧化处理,并研究了三乙醇胺浓度对AZ91D镁合金阳极氧化膜层性能的影响规律。利用电压-时间曲线,全浸腐蚀实验、动电势极化曲线和扫描电镜(SEM)等方法检测和观察阳极氧化膜层的性能和表面形貌。实验结果表明:三乙醇胺可以有效抑制火花放电,增加膜层的厚度,使表面孔隙变小,提高表面光洁度;当三乙醇胺浓度为***-3时,膜层耐蚀性能最好;在阳极氧化过程中,三乙醇胺化学吸附于镁合金表面,从而改变微弧氧化过程中氧气气泡在镁合金表面的吸附强度和氧气气泡的大小,降低了微弧氧化陶瓷层孔隙率,提高了阳极氧化膜的致密性和耐蚀性。

关键词： AZ91D镁合金三乙醇胺阳极氧化耐腐蚀性

金催化炔基膦酸酯水合反应合成β-羰基膦酸酯

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有机化学 2014年第10期34卷 2007-2014页

作者：刘开建刘宏伟王文革欧丽娟王津津胡波年湖南工学院材料与化学工程系衡阳421002

β-羰基膦酸酯是一类重要的有机化合物和反应中间体,在有机合成及药物化学中发挥着重要的作用.提供了一种高原子经济性、高选择性、温和的炔基膦酸酯水合反应体系.实验结果表明:在阳离子金催化剂(2.5 mol%)的催化作用下,以1,2-二氯乙烷(... 详细信息

β-羰基膦酸酯是一类重要的有机化合物和反应中间体,在有机合成及药物化学中发挥着重要的作用.提供了一种高原子经济性、高选择性、温和的炔基膦酸酯水合反应体系.实验结果表明:在阳离子金催化剂(2.5 mol%)的催化作用下,以1,2-二氯乙烷(1 m L)为溶剂,室温下炔基膦酸酯(1 mmol)与水(3 mmol)发生水合反应,高收率、高区域选择性地得到β-羰基膦酸酯化合物(收率≥92%).该方法具有底物适用范围广、反应条件温和、环境友好等优点,为含β-羰基膦酸酯结构单元的天然产物及复杂药物分子的合成提供了一种新途径.

关键词：炔基膦酸酯 β-羰基膦酸酯化合物金催化水合反应