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Facile synthesis of defected TiO_(2-x)(B) nanosheet/graphene oxide hybrids with high photocatalytic H_(2) activity

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Journal of Materials Science & Technology 2021年第21期80卷 171-178页

作者： Xiangchen Kong Huiming Huang Zhaoyang Li Yanqin Liang Zhenguo Li shengli zhu School of Materials Science and Engineering Tianjin UniversityTianjin300350China National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin300300China School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou730070China

TiO_(2)(B) nanosheets/GO(graphene oxide) hybrids are considered to be outstanding performance photocatalysts for high efficiency of H_(2) evolution. However, they still suffer severe challenges during the synthetic processes, such as a large amount of the capping agents adhering on the surface and easy occurrence of aggregation. To figure out these obstacles, Ar plasma treatment as a modified method in this study not only enable the TiO_(2)(B) nanosheets distributed uniformly on the GO sheets but also engineer defects within TiO_(2)(B) nanosheets to significantly improve the photocatalytic activity for the water splitting. The hydrogen evolution rate of the TiO_(2)-x(B)/GO sheets is 1.4 times higher compared with that of original TiO_(2)(B)/GO sheets without Ar plasma treatment. The improved photocatalytic properties were owing to the synergetic effects of oxygen vacancies and the heterojunction between GO and TiO_(2)(B), which can promote the visible light utilization and accelerate separation and transportation of photogenerated electron-holes. This study can provide a facile pathway to prepare the two-dimensional hybrid photocatalysts with high photocatalytic H_(2) activity.

关键词： TiO_(2)(B)nanosheets Plasma etching Structure defect Heterojunction Photocatalytic H_(2)evolution

Self-supported amorphous nanoporous nickel-cobalt phosphide catalyst for hydrogen evolution reaction

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Progress in Natural Science:Materials International 2021年第2期31卷 201-206页

作者： Yao Pang shengli zhu Zhenduo Cui Yanqin Liang Zhaoyang Li Shuilin Wu School of Materials Science and Engineering Tianjin University School of Materials Science and Engineering Lanzhou Jiaotong University

Hydrogen evolution reaction(HER) through electrocatalysis using cost-efficient and long-term stable bimetallic phosphide as electrocatalyst holds a great promise for sustainable clean energy technologies. In this study, self-supported nanoporous Ni-Co-P(np-Ni-Co-P) catalyst with amorphous structure was synthesized by utilizing a facile electrochemical dealloying strategy. The results showed that due to the nanoporous structure, disorder atomic arrangement and alloying effect, the np-Ni-Co-P exhibited outstanding electrocatalytic performance for HER with low overpotential of 114 m V at a current density of 10 mA cm~2, small Tafel slope(57.3 mV dec-1) and good long-term durability in 1 M KOH. The synergetic effect of Ni and Co elements improves the intrinsic activity of the active sites. This research provides a direction for the exploration of bimetallic phosphides toward HER in the water splitting process.

关键词： Hydrogen evolution reaction Metal phosphide Electrocatalyst Dealloying Amorphous alloys

Development of high-performance Fe-rich Fe–P–C amorphous alloys with enhanced magnetization and low coercivity

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Progress in Natural Science:Materials International 2024年第4期34卷 787-794页

作者： Jing Ding Cong Liu Guochen Sun Jie Cui Shuqiang Lv Zhaocan Li Jili Tian shengli zhu School of Energy and Machinery Dezhou University School of Materials Science and Engineering Hebei University of Technology Trier College of Sustainable Technology Yantai University School of Materials Science and Engineering Tianjin University School of Materials Science and Engineering Lanzhou Jiaotong University

Using melt spinning technology, we successfully synthesized a series of Fe-rich Fe–P–C amorphous alloys exhibiting high saturation magnetization（Bs）, low coercivity（Hc）, and excellent bending ductility. These alloys exhibit low Hcvalues ranging from 4.1 to 7.2 A/m, and high Bsvalues ranging from 1.58 to 1.68 T. Particularly,after annealing at 588 K for 900 s, the Fe83P11C6amorphous alloy showed extraordinary soft magnetic properties:Bsup to 1.68 T, Hconly 4.7 A/m, and the core loss at approximately 1.5 W/kg under the condition of 0.5 T and 50Hz, all of which surpass the reported Fe–P–C ternary amorphous and nanocrystalline alloys. These Fe-rich Fe–P–C alloy ribbon samples exhibit favorable bending ductility in both the as-spun and annealed states. Their simple alloy composition, outstanding soft magnetic properties, and excellent flexibility collectively make these soft magnetic alloys highly promising candidate materials for industrial applications.

关键词： Amorphous alloy ribbon Bending ductility Coercivity Saturation magnetization Soft-magnetic properties

Understanding the macroscopical flexibility/fragility of nanoporous Ag:Depending on network connectivity and micro-defects

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Journal of Materials Science & Technology 2020年第18期52卷 91-101页

作者： Chaoyang Wang shengli zhu Yanqin Liang Zhenduo Cui Shuilin Wu Chunling Qin Shuiyuan Luo Akihisa Inoue School of Materials Science and Engineering Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Composite and Functional Materials Tianjin300072China School of Materials Science and Engineering Hebei University of TechnologyTianjin300130China College of Chemistry Engineering and Materials Science.Quanzhou Normal University Quanzhou362000FujianChina Department of Physics King Abdulaziz UniversityJeddah22254Saudi Arabia

The effective engineering applications of nanoporous metals(NPMs)in flexible energy storage and wearable healthcare biosensor monitoring require its uniform ligaments network,specifically crack-free and flexible monolithic ***,the macroscopic fragility of NPMs restricts their applications in wearable electronics *** we focus on the synthetization of highly flexible *** effects of structural factors,***-network connectivity and micro-cracks on the mechanical properties of nanoporous Ag(np Ag)are *** well-interconnected np Ag metal exhibits higher tensile strength,nanohardness and Vickers hardness than those for the ill-interconnected np Ag *** quality of the network connectivity dominates the strength and hardness of the np *** flexibility/fragility is determined by the micro-crack in np *** crack-free np Ag exhibits good flexible *** micro-cracks are introduced,the np Ag becomes *** control of soft volume shrinkage rate(Vsr)and slow surface diffusivity(Ds)effectively suppresses the crack initiation and propagation of as-formed np *** results provide useful insights to synthesize more flexible and crack-free NPM materials for effective use in public wearable electronics and diverse flexible engineering applications in the future.

关键词： Nanoporous metals Crack-free Selective etching Nanoindentation Flexible

Hierarchical Ni_(3)S_(4)@MoS_(2)nanocomposites as efficient electrocatalysts for hydrogen evolution reaction

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Journal of Materials Science & Technology 2021年第36期95卷 70-77页

作者： Yuxi Ren shengli zhu Yanqin Liang Zhaoyang Li Shuilin Wu Chuntao Chang Shuiyuan Luo Zhenduo Cui School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300350China School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China College of Chemistry Engineering and Materials Science Quanzhou Normal UniversityQuanzhou 362000China

Hydrogen evolution reaction(HER)through water splitting is a promising way to solve the energy ***-metal-free HER electrocatalysts with high efficiency is very important for practical ***,we prepare the Ni_(3)S_(4)@MoS_(2)electrocatalyst on carbon cloth(CC)through a two-step hydrothermal *** Ni_(3)S_(4)nanorods are uniformly integrated with the MoS_(2)nanosheets,forming a hierarchical structure and heterogeneous *** fast electron transfer on the interface enhances the kinetics of catalytic *** hierarchical structure provides more exposed active *** Ni_(3)S_(4)@MoS_(2)/CC exhibits good catalytic activity and long-term stability for *** work provided a practicable strategy to develop efficient electrocatalysts for HER in alkaline media.

关键词： Heterogeneous interfaces Hierarchical structure Metal sulfides Alkaline hydrogen evolution reaction

Modulate the superficial structure of La_(2)Ce_(2)O_(7) catalyst with anchoring CuO_(x) species for the selective catalytic oxidation of NH_(3)

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Journal of Materials Science & Technology 2022年第16期111卷 1-8页

作者： Xiangchen Kong Zhenguo Li Yuankai Shao Xiaoning Ren Kaixiang Li Hanming Wu Congjie Lv Cheng Lv shengli zhu National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin 300300China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

Air contamination caused by the ammonia slip phenomenon has gradually captured the researcher’s extensive *** effective strategy for controlling fugitive NH_(2)is critical to improving the air quality and living *** the present work,CuO_(x)/La_(2)Ce_(2)O_(7)composite as a potential candidate catalyst is synthesized through the electrostatic adsorption method for the selective catalytic oxidation(SCO_(2))of NH_(2)to *** 5%Cu Ox/La_(2)Ce_(2)O_(7)exhibits the best catalytic activity(T=243℃)and ammonia conversion *** improvement of performance is mainly attributed to the superficial connection of[Ce-O-Cu],which enhances the capturing ability of ammonia molecule and accelerates the dissociating efficiency of N–H bonding for Nevolution,*** work provides a facile method to synthesis pyrochlore-like composite catalyst of NH_(2)-SCO_(2) for solving the problem of ammonia slip pollution in the future.

关键词： La_(2)Ce_(2)O_(7)catalyst Selective catalytic oxidation CuO_(x)species Ammonia slip

Surface photodynamic ion sterilization of ITO-Cu_(2)O/ZnO preventing touch infection

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Journal of Materials Science & Technology 2022年第27期122卷 10-19页

作者： Zexin Liu Xiangmei Liu Zhenduo Cui Yufeng Zheng Zhaoyang Li Yanqin Liang Xubo Yuan shengli zhu Shuilin Wu School of Materials Science&Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072China School of Life Science and Health Engineering Hebei University of TechnologyTianjin 300401China School of Materials Science&Engineering Peking UniversityBeijing 100871China

Pathogenic microbial infections are threatening the people’s health and even *** most common channel of infections can be caused by skin contact,especially hand touching facilities such as touching *** this work,Cu_(2)O covered with ZnO nanofilm was prepared on the surface of indium tin oxide conductive glass by electrodeposition and the followed atomic layer deposition *** composite coating had a light transmittance of 71.5%,which met the light transmission needs of touch screen *** spin resonance spectra showed that composite materials can generate more reactive oxygen species(ROS)than a single component under solar light *** was because a p-n junction with a built-in electric field was formed at the interface after Cu_(2)O contacting with *** the process of photocatalysis,photogenerated electrons and holes migrated at the interface driven by the built-in electric field,which promoted the separation of *** antibacterial rate against Staphylococcus aureus reached 92.5%after 3 min of light irradiation with simulated sunlight due to the synergy of ROS and Cu ions,Zn ***,this work may provide a potential method for antibacterial application of preventing hand touch infections.

关键词： Antibacterial Cu_(2)O ZnO Contact infection Photodynamic ion sterilization

Effect of atomic structure on preferential oxidation of alloys:amorphous versus crystalline Cu-Zr

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Journal of Materials Science & Technology 2020年第5期40卷 128-134页

作者： Yifei Xu Lars P.H.Jeurgens Peter Schützendübe shengli zhu Yuan Huang Yongchang Liu Zumin Wang State Key Lab of Hydraulic Engineering Simulation and Safety School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Swiss Federal Laboratories for Materials Science and Technology Laboratory for Joining Technologies and CorrosionUeberlandstrasse 1298600 DuebendorfSwitzerland Max Planck Institute for Intelligent Systems Heisenbergstrasse 3D-70569 StuttgartGermany

The effect of structural order in the parent alloy substrate on the oxidation kinetics and oxide phase evolution was investigated for the thermal oxidation of amorphous Cu33at.%Zr67at.%and crystalline CuZr2 alloys of identical compositions in the temperature range of 200–250?*** was found that,besides the strong preferential oxidation of Zr in both alloys,the lack of structural order in the amorphous Cu33at.%Zr67at.%alloy results in much slower oxidation kinetics,as well as in distinctly different microstructures of the oxide overgrowth and its Zr-depletion zone in the wake of the ZrO2 overlayer growth *** experimental findings can be rationalized on the basis of the strikingly different atomic mobilities of Cu,Zr and dissolved O in the amorphous and crystalline alloys,which also results in different nucleation barriers for crystalline oxide *** thus obtained knowledge on the underlying oxidation mechanisms provides new and profound insights into the surface engineering of metallic alloys.

关键词： Oxidation Atomic structure Amorphous alloys Cu-Zr HRTEM

Self-supporting amorphous nanoporous NiFeCoP electrocatalyst for efficient overall water splitting

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Journal of Materials Science & Technology 2021年第23期82卷 96-104页

作者： Yao Pang Wence Xu shengli zhu Zhenduo Cui Yanqin Liang Zhaoyang Li Shuilin Wu Chuntao Chang Shuiyuan Luo School of Materials Science and Engineering Tianjin UniversityTianjin300350China School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou730070China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin300071China School of Mechanical Engineering Dongguan University of TechnologyDongguan523808China College of Chemistry Engineering and Materials Science Quanzhou Normal UniversityQuanzhou362000China

The design of cost-effective and earth-abundant bifunctional electrocatalysts for highly efficient oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)is important for water splitting as an advanced renewable energy transformation *** this work,the self-supporting amorphous Ni Fe Co P catalyst with nanoporous structure via a facile electrochemical dealloying method is *** from the bicontinuous nanostructure,disordered atomic arrangement,abundant active sites and synergic effect of various transition metals,the as-prepared nanoporous NiFeCoP(np-NiFeCoP)catalyst exhibits good electrocatalytic activity,which achieves the current densities of 10 mA cm^(-2) at low overpotentials of 244 mV and 105 mV for OER and HER in 1.0 M KOH,*** addition,the bifunctional electrocatalyst also shows outstanding and durable electrocatalytic activity in water splitting with a small voltage of 1.62 V to drive a current density of 10 mA cm^(-2) in a two-electrode electrolyzer *** present work would provide a feasible strategy to explore the efficient and low-cost bifunctional electrocatalysts toward overall water splitting.

关键词： Dealloying Amorphous NiFeCoP Water splitting Hydrogen evolution reaction Oxygen evolution reaction