Materials Today Communications
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2021
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IF 3.383
Weidong Han,Xin Qian,Hongbo Ma,Xuefei Wang,Yonggang Zhang
The nickel electroplating followed by a further copper electroplating process was conducted on high modulus carbon fibers (HMCFs), and the HMCFs were oxidized in nitric acid prior to the Ni-plating process. Effect of the electroplating process on the microstructure and mechanical properties of HMCFs was investigated. Uniform nickel particles were observed on the surfaces of Ni-plated HMCFs and fiber diameter increased from 5.0 μm to 6.1 μm. With a further Cu-electroplating process, the fiber diameter continued increasing to 7.5 μm. The Ni-plating process resulted in increased surface roughness, whereas the surface RMS and Ra values dropped significantly after the Cu-plating process. Owing to the Ni-plating treatment, the relative content of carbon element on fiber surfaces decreased from 96.54 % to 36.74 %. After a further Cu-plating process, the relative content of Cu element on HMCF surfaces was as high as 54.01 %. The electroplating process resulted in decreased tensile modulus from 415.71 GPa to 407.71 GPa. By contrast, the tensile strength of electroplated HMCFs increased by 1.1 % due to the reduction of fiber defects and stress concentration. Results also showed that both the Ni-plating and Cu-plating process could lead to significant decreases in the values of electrical resistance and resistivity.
研究领域:
材料科学
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表面工程
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2018
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IF 4.427
Zilong Zhao,Zekun Liu,Hongjie Wang,Wenyi Dong,Wei Wang
Treatment of Ni-EDTA in industrial nickel plating effluents was investigated by integrated application of Fenton and ozone-based oxidation processes. Determination of integrated sequence found that Fenton oxidation presented higher apparent kinetic rate constant of Ni-EDTA oxidation and capacity for contamination load than ozone-based oxidation process, the latter, however, was favorable to guarantee the further mineralization of organic substances, especially at a low concentration. Serial-connection mode of two oxidation processes was appraised, Fenton effluent after treated by hydroxide precipitation and filtration negatively affected the overall performance of the sequential system, as evidenced by the removal efficiencies of Ni 2+ and TOC dropping from 99.8% to 98.7%, and from 74.8% to 66.6%, respectively. As a comparison, O 3 /Fe 2+ oxidation process was proved to be more effective than other processes (e.g. O 3 -Fe 2+ , O 3 /H 2 O 2 /Fe 2+ , O 3 /H 2 O 2 -Fe 2+ ), and the final effluent Ni 2+ concentration could satisfied the discharge standard (<0.1 mg L −1 , China) under the optimal conditions (H 2 O 2 dosage of 1.0 mL L −1 , Fe 2+ : H 2 O 2 mole ratio of 1.46, and reaction time of 10 min for Fenton reaction , initial influent pH of 3.0, O 3 dosage of 252 mg L −1 , Fe 2+ of 150 mg L −1 , and reaction time of 30 min for O 3 /Fe 2+ oxidation). Furthermore, pilot-scale test was carried out to study the practical treatability towards the real nickel plating effluent, revealing the effective removal of some other co-existence contaminations. And Fenton reaction has contributed most, with the percentage ranging from 72.41% to 93.76%. The economic cost advantage made it a promising alternative to the continuous Fenton oxidation.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Zhiyan Hou,He Meng,Xueqing Shao,Xianglong Wang,M. Usman Tahir,Shakiaz Ahmad,Chao Yang,Xintai Su,Lijuan Zhang
The complex composition and recycling process of electroplating sludge are the two major obstacles restricting the recycling of metal resources. In this work, Ni(HCO 3 ) 2 hollow spheres with unique amorphous structure were prepared via a simple and controllable hydrothermal method using nickel-containing electroplating sludge as raw material and ascorbic acid (AA) as complexing agent . The introduction of AA not only changed the morphology of the sample, but also formed pure phase Ni(HCO 3 ) 2 . The controllable amorphous structure is beneficial to the diffusion of OH - in the electrolyte. More importantly, its disordered atomic arrangement and metastable structure provide a large number of active sites and ion transmission channels, which improve the specific capacity. Consequently, amorphous Ni(HCO 3 ) 2 delivers a large capacitance of 599.8 C g −1 at 1 A g −1 , besides large capacitance, it also exhibits large rate capability (61.02% at a current density of 10 A g −1 ) and cycle performance (capacitance retention 52.09% after 1000 cycles). Importantly, the recoveries of nickel, iron and aluminum are 95.57%, 99.92% and 92.30%, respectively, indicating that electroplating sludge has a good application prospect as electrode materials for supercapacitors .
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Zhiqiang Shi,Shuyue Wu,Siyuan Lin,Jia Sun,Han Huang,Deming Kong,Yongli Gao,Conghua Zhou
Silver nanowire based transparent conductor is expected to be widely used in optoelectronic devices. However, when used in perovskite solar cells, it suffers from heavy corrosion caused by the lead halide hybrid perovskite. To solve the problem, nickel electroplating is used to modify the transparent conductor in this study. It is observed that nickel electroplating not only improves the conductance, but also upgrades the corrosion resistance and the oxidization resistance of the transparent conductor. In addition, SnO 2 quantum dots are applied to flatten the conductor surface, while ITO sputtering is used to further improve the film conductance. After that, perovskite solar cells are fabricated on the modified transparent conductors. Current-voltage curves scanning under simulated irradiation shows that, power conversion efficiency of 18.37 % is achieved. Transient photocurrent / photovoltage decay curves and impedance spectroscopy tests show that, nickel treated transparent conductors could ensure efficient charge-extraction process, while retard charge recombination. Storage-stability of the devices is monitored, 80 % of initial performance is reserved after storage in dark for 432 h. The study paves the way for the application of silver nanowire basing transparent conductor in devices when heavy corrosion is involved.
研究领域:
材料科学
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能源科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）