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Effect of the chloride ion on advanced oxidation processes catalyzed by Fe-based metallic glass for wastewater treatment

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Journal of materials science & Technology 2022年第22期117卷 49-58页

作者： Shuangqin Chen Mai Li Qingmin Ji Tao Feng Si Lan KeFu Yao School of material science and Engineering Herbert Gleiter Institute of NanoscienceNanjing University of Science and TechnologyNanjing 210094China School of material science and Engineering Tsinghua UniversityBeijing 100084China School of material science and Engineering Nanjing Institute of TechnologyNanjing 211167China

Fe-based metallic glasses (Fe–MGs) are potential candidate catalysts for advanced oxidation processes(AOPs) for recalcitrant organic pollutant degradation. However, industrial wastewater and natural contaminated sites usually contain abundant inorganic ions, like the chloride ion (Cl−), which significantly affectAOPs, but their influence on MG-activated AOPs still remains unclear. Through the study of three commonly used oxidants, hydrogen peroxide (H_(2)O_(2)), peroxydisulfate (PDS), and peroxymonosulfate (PMS), theeffect of Cl− on the FeSiB-catalyzed process of degradation of the typical azo dye Orange Ⅱ was investigated. Evidence indicates that the addition of Cl− resulted in the monotonous inhibition of the degradation process when the H_(2)O_(2)/FeSiB and PDS/FeSiB systems were employed, but promoted effect wasdetected with the PMS/FeSiB system, which is different from the previously observed dual effect of Cl−.It is closely relative with FeSiB induced unique variety of degradation pathways, including radicals, nonradicals (^(1)O_(2)), and direct reduction degradation. Moreover, the presence of Cl− significantly affected thesystems’ absorbable organic halogen content and the amount of Fe leached into the solution. The resultsof this work will provide essential references for Fe-based MG used as AOP catalysts in field applicationsand the development of advanced MGs with excellent adaptability to complex environments.

关键词： Fe-based metallic glass Advanced oxidation processes Wastewater treatment Chlorine ion

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Silane or Siloxane-Side-Chain Engineering of Photovoltaic materials for Organic Solar Cells

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Chinese Journal of Chemistry 2023年第24期41卷 3703-3713页

作者： Qian Wang Xu Zhang Wentao Zou Huajun Xu Yuanyuan Kan Yanna Sun Ke Gao Shandong Provincial Key Laboratory for science of material Creation and Energy Conversion Science Center for Material Creation and Energy ConversionInstitute of Frontier and Interdisciplinary ScienceShandong UniversityQingdaoShandong266237 China

With the tactful material design,skillful device engineering,and in-depth understanding of morphology optimization,organic solar cells (OSCs) have achieved considerable success.Therefore,OSCs have reached high power conversion efficiencies (PCEs) exceeding 19%.Especially,continuously emerging new materials have been considered as one of the key factors to improve the PCEs of OSCs.Among molecular design strategies,side-chain engineering is an easy and commonly-used means which can optimize the solubility,alter intermolecular stacking arrangement,fine-tune the open circuit voltage (VOC),thus ultimately improve the performance.As hybrid side chains,silane and siloxane side chains have considerable effects,not only in increasing the carrier mobility and tuning the energy level,but also in affecting the crystallinity and molecular orientation.In this review,the latest developments in photovoltaic materials based on silane and siloxane side chains are presented to illustrate the structure-property relationships.The review comprehensively includes silane-side based polymer/small molecule donors;siloxane-side based polymer/small molecule donors,and polymer/small molecule acceptors.Then the similarities and differences between these two side chains are demonstrated.Finally,the possible applications and future prospects of silane and siloxane side chains are presented.

关键词： Organic solar cell Silane side chain Siloxane side chain Side chain engineering High performance Batteries Applications

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Enhanced activity and durability of FeCoCrMoCBY nanoglass in acidic hydrogen evolution reaction

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Journal of materials science & Technology 2024年第3期170卷 212-220页

作者： Mengyang Yan Shuangqin Chen Shangshu Wu Xuechun Zhou Shu Fu Di Wang Christian Kübel Horst Hahn Si Lan Tao Feng Herbert Gleiter institute of Nanoscience School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China institute of Nanotechnology Karlsruhe Institute of TechnologyKarlsruhe 76021Germany

In the present work,a multi-element nanoglass(m-NG)of FeCoCrMoCBY is obtained first time by the laser ablation combined with inert gas condensation(laser-IGC)technique.Compared with the conventional rapid-quenched metallic glass(MG)with identical composition,the Fe-based m-NG demonstrates a superior performance as a self-supported electrocatalyst for hydrogen evolution reaction(HER)in acidic solution.The enhanced HER activity of m-NG is proposed to be closely related to its high en-ergy states,which is originated from the unique inhomogeneous nanostructures with a high density of low-coordinated atoms.Additionally,the Fe-based m-NG exhibits an outstanding comprehensive catalytic performance even beyond the commercial Pt/C catalyst in long-term test due to its self-optimization ability.This work not only opens the way to the preparation of m-NGs by the novel laser-IGC technique,but also makes a great contribution to developing low-cost,high-efficient,and super-durable HER electrocat-alysts in acidic environment.

关键词： Nanoglass Inert gas condensations High energy states Hydrogen evolution reactions

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Multi-heterointerfaces for selective and efficient urea production

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National science Review 2023年第2期10卷 212-223页

作者： Danyan Zhang Yurui Xue Xuchen Zheng Chao Zhang Yuliang Li institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of sciences Shandong Provincial Key Laboratory for science of material Creation and Energy Conversion Science Center for Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong University

A major impediment to industrial urea synthesis is the lack of catalysts with high selectivity and activity,which inhibits the efficient industrial production of urea.Here,we report a new catalyst system suitable for the highly selective synthesis of industrial urea by in situ growth of graphdiyne on the surface of cobalt-nickel mixed oxides.Such a catalyst is a multi-heterojunction interfacial structure resulting in the obvious incomplete charge-transfer phenomenon between a graphdiyne and metal oxide interface and multiple intermolecular interactions.These intrinsic characteristics are the origin of the high performance of the catalyst.Studies on the me chanism reve al that the catalyst could effectively optimize the adsorption/desorption capacities of the intermediate and promote direct C-N coupling by significantly suppressing by-product reactions toward the formation of H2,CO,N2and NH3.The catalyst can selectively synthesize urea directly from nitrite and carbon dioxide in water at room temperature and pressure,and exhibits a record-high Faradaic efficiency of 64.3%,nitrogen selectivity(Nurea-selectivity) of86.0%,carbon selectivity(Curea-selectivity) of ～100%,as well as urea yield rates of 913.2 μg h-1mgcat-1and remarkable long-term stability.

关键词： porous materials carbon materials multi-heterointerfaces urea synthesis high-performance conversion

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Construction of BiVO_(4)/BiOCl@C Z-scheme heterojunction for enhanced photoelectrochemical performance

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International Journal of Minerals,Metallurgy and materials 2022年第11期29卷 1971-1980页

作者： Jiaxin Li Hao Yuan Wenjie Zhang Ruijie Zhu Zhengbo Jiao institute of materials for Energy and Environment College of Material Science and EngineeringQingdao UniversityQingdao 266071China

A Z-scheme heterostructure of Mo,W co-doped BiVO_(4)(Mo,W:BVO/BiOCl@C)was fabricated by a simple solid solution drying and calcination(SSDC)method.The heterostructure was characterized by X-ray diffraction(XRD),Fourier transform infrared(FTIR),X-ray photoelectron spectroscopy(XPS),etc.Under visible light irradiation,Mo,W:BVO/BiOCl@C heterostructure exhibits excellent photoelectrochemical capability compared with other as-prepared samples.The photocurrent density and the incident photon-to-electron conversion efficiency(IPCE)are about 5.4 and 9.0 times higher than those of pure BiVO_(4),respectively.The enhancement of the photoelectrochemical performance can be attributed to the construct of Z-scheme system,which is deduced from the radical trapping experiments.The Mo,W:BVO/BiOCl@C Z-scheme heterojunction enhances the visible-light absorption and reduces the recombination rate of charge carriers.This work provides an effective strategy to construct Z-scheme photoelectrodes for the application of photoelectrochemical water splitting.

关键词： photoelectrochemical bismuth vanadate BiOCl Z-scheme carbon

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Electrochemical performance of aluminum niobium oxide as anode for lithium-ion batteries

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Rare Metals 2016年第3期35卷 256-261页

作者： Qi Wang Fu-Chi Wang Xing-Wang Cheng School of material science and Engineering Beijing Institute of Technology

AlNbO_4,as lithium-ion batteries（LIBs） anode,has a high theoretical capacity of 291.5 m Ah g^-1.Here,AlNbO_4 anode materials were synthesized through a simple solid-state method.The structure,morphology and electrochemical performances of AlNbO4 anode were systematically investigated.The results show that AlNbO4 is monoclinic with C2/m space group.The scanning electron microscopy（SEM） and transmission electron microscopy（TEM） characterizations reveal the AlNbO_4 particles with the size of 100 nm^–2 lm.As a lithium-ion batteries anode,AlNbO4 delivers a high reversible capacity and good rate capability.The discharge capacity is as high as 151.0 m Ah g^-1 after 50 charge and discharge cycles at 0.1 C corresponding to capacity retention of 90.7 %.When the current density increases to 5.0C,AlNbO4 anode displays reversible discharge capacity of 73.6 m Ah g^-1 at the50 th cycle.

关键词： Aluminum niobium oxide Electrochemical performance Anode Lithium-ion batteries

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The electronic structures, Born effective charge tensors,and phonon properties of cubic, tetragonal,orthorhombic, and rhombohedral K_(0.5)Na_(0.5)NbO_3: A first-principles comparative study

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Chinese Physics B 2014年第12期23卷 390-397页

作者：周树兰赵显江向平韩晓东 Department of material science and Engineering Jingdezhen Ceramics Institute State Key Laboratory of Crystal material Institute of Crystal Material Shandong University

The electronic structures, Born effective charges（BECs）, and full phonon dispersions of cubic, tetragonal, orthorhombic, and rhombohedral K0.5Na0.5Nb O3 are investigated by the first principles method based on density functional theory.The hybridized states of Nb 4d and O 2p states are observed in the valence band, showing the formation of a strong Nb–O covalent bond which should be responsible for the displacement of Nb and O atoms. The abnormally large BECs of Nb and O indicate the possibility of phase instability induced by the off-center displacement of Nb and O atoms. The phonon dispersions reveal that the ferroelectric instability of K0.5Na0.5Nb O3 is dominated by Nb and O displacements with significant Na characteristics. In addition to the ferroelectric instability, there is also rotational instability coming from the oxygen octahedra rotation around one axis. Moreover, the Γ phonon properties of orthorhombic KNb O3, Na Nb O3, and K0.5Na0.5Nb O3 are also studied in detail.

关键词： Born effective charge phonon dispersion density functional theory（DFT） phase instability of K0.5Na0.5NbO3

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通过双掺杂增强Li_(7)P_(2.9)Sb_(0.1)S_(10.65)O_(0.15)I_(0.2)电解质用于高性能全固态锂硫电池

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science China materials 2023年第2期66卷 513-521页

作者：赵博生陈鹏高学平 institute of New Energy material Chemistry School of Materials Science and EngineeringNankai UniversityTianjin 300350China

硫化物固体电解质是发展高容量锂硫电池的理想候选者.然而,同时提高硫化物固体电解质的离子导电性、空气稳定性和电解质/电极界面的相容性仍然是一个巨大的挑战.因此,我们提出了一种双掺杂(Sb_(2)O_(3)和LiI)策略来制备多功能硫化物固... 详细信息

硫化物固体电解质是发展高容量锂硫电池的理想候选者.然而,同时提高硫化物固体电解质的离子导电性、空气稳定性和电解质/电极界面的相容性仍然是一个巨大的挑战.因此,我们提出了一种双掺杂(Sb_(2)O_(3)和LiI)策略来制备多功能硫化物固体电解质.Sb_(2)O_(3)可以拓宽锂离子的传输路径和提高空气稳定性,而LiI可以抑制锂枝晶的生成和降低电解质/电极之间的电阻.因此,硫化物固体电解质在空气中和界面上的性能得到了增强,在30℃下的离子电导率为1.69×10^(-3)S cm^(-1),且具有很好的空气稳定性,对金属锂也很稳定.在此基础上,组装的全固态锂硫电池以0.05 C循环100圈后,表现出较高的放电比容量(室温,833 mA h g^(-1);60℃:949 mA h g^(-1)).本文为制备实用的硫化物固体电解质和高性能全固态锂硫电池提供了合理的方案.

关键词：锂硫电池硫化物固体电解质放电比容量离子导电性空气稳定性离子电导率电极界面锂枝晶

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一种基于Al_(2)O_(3)纳米纤维骨架的锂硫电池用凝胶聚合物电解质

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science China materials 2023年第3期66卷 913-922页

作者：王慧敏王振宇周畅李国然刘胜高学平 institute of New Energy material Chemistry School of Materials Science and EngineeringNankai UniversityTianjin 300350China

锂硫电池作为一种极具前景的二次电池系统受到了广泛关注.然而,传统液态电解质中多硫化锂的穿梭效应阻碍了其发展.在本工作中,我们制备了用于锂硫电池的功能性凝胶电解质.该电解质由聚偏氟乙烯-六氟丙烯(PVDF-HFP)和连续γ-Al_(2)O_(3)... 详细信息

锂硫电池作为一种极具前景的二次电池系统受到了广泛关注.然而,传统液态电解质中多硫化锂的穿梭效应阻碍了其发展.在本工作中,我们制备了用于锂硫电池的功能性凝胶电解质.该电解质由聚偏氟乙烯-六氟丙烯(PVDF-HFP)和连续γ-Al_(2)O_(3)三维骨架组成.PVDF-HFP提供锂离子传输路径,使电解质具有良好的柔性;γ-Al_(2)O_(3)为路易斯酸,可通过与多硫化锂之间的路易斯酸碱相互作用抑制穿梭效应.而且,γ-Al_(2)O_(3)与路易斯碱TFSI-有相互作用,可促进锂盐解离,提高锂离子迁移数.此外,部分γ-Al_(2)O_(3)可以与LiF反应形成锂离子导体LiAlO_(2)和Li3AlF6来提高离子电导率.使用该凝胶电解质的锂硫电池在正极容量保持和负极形貌方面展现出良好的稳定性.该项研究为制备高能量锂硫电池的多功能凝胶电解质提供了一种有前景的策略.

关键词：锂硫电池液态电解质穿梭效应锂离子导体二次电池锂离子迁移数凝胶电解质离子电导率

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Preparation of TiAl alloy powder by high-energy ball milling and diffusion reaction at low temperature

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Rare Metals 2018年第1期37卷 21-25页

作者： Hui-Ping Shao Zhi Wang Tao Lin Qing Ye Zhi-Meng Guo institute for Advanced material and Technology University of Science and Technology Beijing

In this paper, TiAl alloy powders were prepared successfully by high-energy ball milling and diffusion reaction in vacuum at low temperature. The titanium powder, aluminum powder, and titanium hydride powder were used as raw materials. The samples were characterized by scanning electron microscopy（SEM）, X-ray diffraction（XRD）, field-emission scanning electron microscopy（FESEM）, and differential thermal analysis（DTA）. The results show that the alloy powders with the main intermetallic compounds of TiAl are obtained using Ti-Al powders and TiH2-Al powders after heated for 2 h at 500 ℃,3 h at 600 ℃,and 3 h at 750 ℃,respectively.The average grain sizes of alloy powder are about 45 and20 μm with irregular shape, respectively. The prepared TiAl alloy powders are relatively pure, and the average quality content of oxygen in the alloy powders is0.33 wt%. The forming process of alloy powder contains both the diffusion reaction of Ti and Al,which gives priority to the diffusion reaction of aluminum.

关键词： High-energy ball milling Titanium hydride powder Titanium powder TiAl alloy powder Diffusion reaction

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