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Coupling a titanium dioxide based heterostructure photoanode with electroless-deposited nickel-phosphorus alloy coating on magnesium alloy for enhanced corrosion protection

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Journal of Materials Science & Technology 2022年第31期126卷 252-265页

作者： Yue Liu Feng Peng Guang-Ling Yang Zhi-Hui Xie Wenxin Dai Yuejun Ouyang Liang Wu Chuan-Jian Zhong Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Medical Research Center Department of OrthopedicsGuangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol(PVA)Fiber Material Huaihua UniversityHuaihua 418000China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China Department of Chemistry State University of New York at BinghamtonBinghamtonNY13902United States

The utilization of photoelectrochemical cathodic protection(PECCP)enables an indirect corrosion pro-tection of metals with low self-corrosion potential by introducing a metallic nickel interlayer.However,the ability to enhance the PECCP efficiency remains challenging because of the inherent property of the semiconductor.Herein,this ability is demonstrated by coupling a covalent organic framework(TpBD)dec-orated TiO 2 photoanode(TiO 2/TpBD)with nickel coating on magnesium alloy for an effective corrosion protection.The composite photoanode showed direct PECCP for the nickel interlayer and indirect corro-sion protection of the magnesium alloy.The composite structure of the nanotube array and the covalent organic framework for the photoanode were confirmed by field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).The en-hanced photoelectrochemical conversion capability and PECCP performance of the nickel-coated Mg alloy were evidenced by the results from electrochemical and photoelectrochemical measurements including Mott-Schottky curves,photoinduced potential variations,and electrochemical impedance spectroscopy(EIS).Lastly,a corrosion protection mechanism is proposed,where the enhanced PECCP efficiency is at-tributed to the formation of a direct Z-scheme heterojunction,which is substantiated by the results from valence band(VB)XPS and electron spin resonance characterizations.

关键词： Magnesium alloy Corrosion Nickel coating electroless Photoelectrochemical cathodic protection

electroless nickel fabrication on surface modified magnesium substrates

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Defence Technology（防务技术） 2019年第4期15卷 636-644页

作者： Ayushi Thakur Swaroop Gharde Balasubramanian Kandasubramanian Department of Metallurgical and Materials Engineering National Institute of Technology Hazratbal Srinagar Jammu & Kashmir 190006 India Department of Metallurgical & Materials Engineering DIAT (DU) Ministry of Defence Girinagar Pune 411025 Maharashtra India

In recent years,magnesium(Mg)has evolved as a salient material,in affiliation with electroless nickel(Ni)coating,which have found applications in automobiles,aerospace and confederate fields attributing to its excellent inherent weight sensitive properties.However,being acknowledged for its remarkable auxiliary properties like flexible machining,appreciable weight sensitivity and ability to be patently diecast into mesh constructs,magnesium is prejudiced by aeronautical standards predominantly for its inferior corrosion resistance properties.In this sense,electroless nickel plating on magnesium and its alloys has been suggested to extricate it from corrosion problem and make it more competitive in industrial and defence applications.Autocatalytic fixation of metal ions onto respective substrates accrues and alters their mechanical,electrochemical and tribological properties,destitute of any electric current aid.This proficiently identified technique is prosecuted with the assistance of a series of sequenced operations involving a prior pretreatment,which corresponds to the chemical cleaning of the substrate surface;electroless coating;and a later activation process which is a mild etching of the electroless coated surface.The susceptibility of magnesium to this methodology has advanced and propagated its exercise and applicability in aircraft,satellites and allied aeronautical fields.Contemporarily,researchers have proposed various eco-friendly and modified duplex and composite coatings which have transmuted properties of these appendages by tailoring alloy compositions and reagents employed.This review article systematically colligates various considerations and evaluations on electroless nickel applications of magnesium and its alloys and explicates how it anchors its practice in the respective domains.Furthermore,a comprehensive analysis is devised based on the pre-existing treatment methods for accomplishing the same.

关键词： electroless nickel plating Magnesium Magnesium alloys Corrosion-resistance Micro arc oxidation(MAO)

electroless plating of Ni-Zn(Fe)-P alloy on carbon steel sheets

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 157-161页

作者： WANG Sen-lin WU Hui-huang College of Materials Science and Engineering Huaqiao University Quanzhou 362021 China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryXiamen University Xiamen 361005 China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryXiamen University Xiamen 361005 China

The autocatalytic deposition of Ni-Zn(Fe)-P alloys were carried out on carbon steel sheets from bath containing nickel sulfate, zinc sulfate, sodium hypophosphite, sodium citrate and boric acid. The effects of pH and mole ratio of NiSO4/ZnSO4 on the deposition rate and the composition of deposit were studied. It is found that the presence of zinc sulfate in the bath has an inhibitory effect on the alloy deposition. As a consequence, the mole fraction of zinc in the deposits never reaches high value, which is less than 18.0%. The structure and surface morphology of Ni-Zn(Fe)-P coatings were charactered by XRD and SEM. The alloys plated at all conditions consist of amorphous phase coexisting with a crystalline cubic Ni phase. The surface morphology of coating is dependent on the deposition parameters.

关键词： electroless plating nickel zinc

Highly sensitive and selective electrochemical immunosensors by substrate-enhanced electroless deposition of metal nanoparticles onto three-dimensional graphene@Ni foams

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Science Bulletin 2019年第17期64卷 1272-1279页

作者： Changrong Zhao Xiaoli Li Shixia An Dongliang Zheng Shuaili Pei Xiao Zheng Yu Liu Qingqing Yao Mei Yang Liming Dai Institute of Advanced Materials for Nano-Bio Applications School of Ophthalmology ■ Optometry Wenzhou Medical University Wenzhou 325027 China Department of Macromolecule Science and Engineering Case Western Reserve University Cleveland OH 44106 USA

In this study, we have for the first time preformed the facile substrate-enhanced electroless deposition(SEED) of metal nanoparticles onto monolithic graphene@Ni foams for construction of disposable three-dimensional(3 D) electrochemical immunosensors. Specifically, we firstly used the SEED method to deposit gold nanoparticles(AuNPs) onto the graphene@Ni foam for immobilization of antibody(Ab1). This is followed by a second step SEED deposition to produce silver nanoparticles(AgNPs) for electrochemical stripping detection. Using a-fetoprotein antigen(AFP) as a module analyte, the newly-developed sensor showed a wide linear response, ranging from 5.0 pg/mL to 5.0 ng/mL and a low detection limit down to 2.3 pg/mL. The newly-developed 3 D-immunosensor is sensitive, reliable,and easy to be fabricated, showing great potential for clinic applications.

关键词： Electrochemical immunosensor Substrate-enhanced electroless deposition Graphene Ni foam Metal nanoparticles a-Fetoprotein antigen

electroless deposition of Ni on template of halloysite and its magnetic property

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 152-156页

作者： FU Yu-bin ZHANG Li-de ZHENG Ji-yong Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Luoyang Ship Material Research Institute Luoyang 471039 China Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Luoyang Ship Material Research Institute Luoyang 471039 China

Halloysite template, a ceramic substrate, is of a hollow cylindric structure, on which the fine Pd nanoparticles are uniformly formed by the reduction of palldate chloride to initiate electroless deposition. The electroless deposition of Ni is catalyzed by the Pd particles, which results in a uniform layer of Ni-P alloy on halloysite. The alloy is of a nanocrystalline structure, of which the average diameter is about 6 nm. After being heat-treated at 400 ℃, it contains both Ni and Ni12P5 crystal, meanwhile, the Ni crystal gets larger with an average size of 51.9 nm.The content of phosphorous in the Ni layer has a great influence on crystal structure. The metallized halloysite has a higher inherent coercive force, and a much lower saturation magnetization in its as-plated state, while after heattreatment, the inherent coercive force decreases drastically. These magnetic properties have great relationship with the superparamagnetism of Ni nanocrystalline and the stress anisotropy in Ni layer.

关键词： halloysite template electroless deposition Ni nanocrystalline inherent coercive force

electroless deposition of Au nanoparticles on reduced graphene oxide/polyimide film for electrochemical detection of hydroquinone and catechol

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Frontiers of Materials Science 2017年第3期11卷 262-270页

作者： Xuan SHEN Xiaohong XIA Yongling DU Chunming WANG College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

An electrochemical sensor for determination of hydroquinone （HQ） and catechol （CC） was developed using Au nanoparticles （AuNPs） fabricated on reduced graphene oxide/polyimide （PIIRGO） film by electroless deposition. The electrochemical behaviors of HQ and CC at PIIRGO-AuNPs electrode were investigated by cyclic voltammetry （CV） and differential pulse voltammetry （DPV）. Under the optimized condition, the current responses at PI/RGO-AuNPs electrode were linear over ranges from 1 to 654 mol/L for HQ and from 2 to 1289 mol/L for CC, with the detection limits of 0.09 and 0.2 mollL, respectively. The proposed electrode exhibited good reproducibility, stability and selectivity. In addition, the proposed electrode was successfully applied in the determination of HQ and CC in tap water and the Yellow River samples.

关键词： electroless Au nanoparticles hydroquinone catechol sensor

Effects of Binary Mixture of Yb_2O_3-La_2O_3 on Pd/Ag Co-Deposition by electroless Plating

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Journal of Rare Earths 2006年第Z2期24卷 71-74页

作者：蒋柏泉刘贤湘白立晓 School of Environmental and Chemical Engineering Nanchang University

The binary mixture of Yb2O3-La2O3 was used as an additive to improve the traditional electroless plating for Pd-Ag co-deposition on the inside surface of a porous ceramic tube. The main attention were paid to investigating the effects of Yb2O3-La2O3 on Pd-Ag co-deposition rate, plating temperature, Ag content in film and Pd/Ag reduction potentials. The experimental results show that the co-deposition rate is increased by 63%, the plating temperature is decreased by 10～20 ℃ for obtaining the same co-deposition rate and the Ag content in film basically remains unchangeable when Yb2O3-La2O3 is added into the traditional electroless plating solution. The experiment also shows that Pd/Ag reduction potentials basically remain unchangeable with the binary rare earths based on the electrochemical mathematical models An inorganic composite membrane with alloy film of 76.8(mol)% Pd-23.2(mol)% Ag and the thickness of 7.7 μm on the porous ceramic tube was prepared and the permeation fluxes of hydrogen and nitrogen through the membrane are 8.65×10-3 and 1.92×10-6 m3·m-2·s-1 at 350 ℃ and 0.3 MPa respectively.

关键词： electroless plating Pd-Ag alloy ceramic tube composite membrane rare earths

Deposition features of Ni on self-assembled microtubule template from biolipid by electroless method

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Science China Chemistry 2004年第3期47卷 228-234页

作者： FU Yubin1,2, ZHANG Lide1, ZHENG Jiyong2, FU Shangang3 & ZHU Mingwei3 1. Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China 2. Luoyang Ship Material Research Institute, Luoyang 471039, China 3. College of Life Science, Henan Normal University, Xinxiang 453002, China Institute of Solid State Physics Chinese Academy of Sciences Hefei China Luoyang Ship Material Research Institute Luoyang China College of Life Science Henan Normal University Xinxiang China

Diacetylenic glycero-phosphatidylcholine is a chiral molecule with amphiphilic property, and it can self-assembly into a lipid microtubular structure. The lipid microtubule is a stable structure formed by tightly wound helical ribbons, and the ribbon-wrapping patterns have a significant effect on their chemical deposition on the microtubules. The deposition of colloidal Pd catalyst occurs mainly on the helical edge of the wound helical ribbons to form helical deposition lines of colloidal Pd particles in the interior and exterior of the lipid microtubules, resulting in an uneven chemical deposition of Ni on the microtubules. Catalyzed by as-deposited colloidal Pd, metallized Ni microtubules are characterized by a helical form, which may be in relation to inner stress due to the thickness difference or the different deposition processes. The observation of microtom shows that metallized tubules have a hollow structure. Some metallized tubules have a kind of coaxial double layer structure observed in the direct experiment evidence, indicating that metallization can occur in the inner and outer surface of the lipid tubules. Both lipid microtubules and metallized microtubules can be used as vehicles for encapsulating biological active mole-cules to control their release and to develop micro-components in biological and mechanical systems.

关键词： molecular self-assembly, lipid microtubules, helical pattern, site-specific deposition, electroless metallization.

electroless PLATING COMPOSITE COATINGS OF Ni-Ti-Re ON THE SURFACE OF DIAMOND

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Journal of Central South University 1999年第1期11卷 14-16页

作者： Guorong Hu Yexiang Liu Jianhong Yang Kaihua Yang Fenglin Tang Jihong Jin 1. Department of Nonferrous Metallurgy Central South University of Technology 410083 Changsha China 2. Institute of Technology China University of Geosciences 430074 Wuhan China

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关键词： diamond electroless plating composite coatings Ti particles rare earth