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材料科学技术（英文版）
材料科学技术（英文版）

胡壮麟

月刊

1005-0302

jmst@imr.ac.cn

024-83978208

110016

沈阳市沈河区文化路72号

材料科学技术（英文版）/Journal Journal of Materials Science & TechnologyCSCDCSTPCD北大核心EISCI
查看更多>>本刊简称《JMST》，（ISSN 1005-0302，CN 21-1315/TG）。1985年创刊。是中国科协主管，中国金属学会，中国材料研究学会和中国科学院金属研究所联合主办的国际性英文期刊，以“加强国际交流，扩大学术影响，服务经济建设”为办刊宗旨，刊登世界各国的具有创新性和较高学术水平的原始性论文，并设有物约综述、快报、简讯及国内外材料界杰出学者简介等栏目，内容包括金属材料、无机非金属材料、复合材料及有机高分子材料等。
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    N and O vacancies regulation over semiconductor heterojunction to synergistically boost photocatalytic hydrogen peroxide production

    Chaoqian AiBing LuoChunyang ZhangYadi Wang...
    237-247页
    查看更多>>摘要：Defect engineering represents a potent strategy for the modification of electronic properties by intro-ducing atomic vacancies in photocatalysts.However,the synergistic enhancement attributable to dif-ferent types of atomic vacancies within a heterojunction,as well as their underlying mechanisms,re-mains sparsely studied.Here,the flexible g-C3N4 materials with varying nitrogen vacancies were pre-pared via a facile calcination method under different atmospheric conditions and then composited with CeO2 nanocubes to construct Z-scheme heterojunction.It was observed that CeO2 has abundant O vacan-cies,and the g-C3N4 form tertiary nitrogen defects at the center of the heptazine units under an NH3 atmosphere treatment.The resulting enhancement in the interfacial built-in electric field,coupled with the synergistic effect of O and N vacancies within the Z-scheme heterojunction,has been demonstrated to significantly enhance charge transfer efficiency.This results in an optimized photoactivity with a H2O2 generation rate of 2.01 mmol g-1 h-1.This work opens an avenue for constructing and optimizing the heterogeneous photocatalysts by defect engineering technology,and provides deep insight to understand the nature of vacancy engineering in designing effective catalysts for solar energy conversion.
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    Effect of adaptive nanocrystalline behaviors on the cavitation erosion performance ofCu47.5Zr45.1Al7.4bulk metallic glass

    Tongchao XuGuoliang HouHaobo CaoJunkai Ma...
    248-261页
    查看更多>>摘要：Amorphous alloys have attracted much attention in the field of cavitation erosion(CE)due to their good comprehensive properties.However,due to the special amorphous structures that are difficult to char-acterize,their micro-response behaviors and damage mechanisms during the CE process have not been well elucidated.In this paper,advanced techniques including focused ion beam(FIB)and transmission electron microscope(TEM)were used to comparatively study the microstructure evolution and volume loss rules of Cu47.5Zr45.1Al7.4 and Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glasses(BMG)under the action of cavitation load and cavitation heat to reveal their CE mechanisms.The results showed that the absence of small atoms in Cu475Zr45.1Al7.4 led to a large free volume,thereby compromising its hardness,modulus,and yield strength.However,this also made it more susceptible to shear banding,which in turn enhanced its energy absorption capabilities.Although Cu47.5Zr45.1Al7.4 had a higher glass transition temperature(Tg)and onset temperature of crystallization(Tx),as well as a wider supercooled liquid phase region(ΔTx),its exothermic peak was obviously pronounced and the transformation temperature range was signifi-cantly narrower.Therefore,it is more likely to adaptively form Cu-rich nanocrystals under the action of cavitation heat.Additionally,the larger free volume in the shear band was conducive to the diffusion of atoms and the occurrence of adaptive nanocrystallization behaviors in Cu47.5Zr45.1Al7.4.These nanocrystals were able to effectively force crack deflection,thereby dissipating impact energy and delaying the fatigue spallation of the material.Consequently,Cu47.5Zr45.1Al7.4 exhibited a far longer incubation period and a noticeably lower cumulative volume loss.
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    Artificially regulating the crystallinity for constructing poly(heptazine imide)-based S-scheme homojunction with boosted photocatalytic hydrogen evolution performance

    Xuehua WangTianyu ShiJinfeng CuiGuicun Li...
    262-272页
    查看更多>>摘要：Fabricating homojunction photocatalyst is a promising approach to accelerate the separation and transfer of photogenerated charge carriers,and to boost photocatalytic performance.Herein,a novel poly(hep-tazine imide)(PHI)-based S-scheme homojunction photocatalyst(U/T-LHPHI)is fabricated through an ionothermal synthesis route,which exhibits particular high and low crystallinity property,intimate in-terface combination,and locally N self-doping.The regulation of crystallinity contributes to the differen-tiated electronic structure in PHI,which leads to the establishment of internal electric field(IEF).The in-tense IEF and N doping level with electron extracting capacity synergistically promote the charge transfer from the high crystalline PHI(HPHI)to the low crystalline PHI(LPHI)following the S-scheme mecha-nism.Additionally,the strong interfacial interaction improves the interfacial charge transfer dynamics.As a consequence,photogenerated electrons with powerful reducing ability are maintained effectively.Upon light irradiation,the optimized U/T-LHPHI performs an H2 evolution rate of 4880,2416,and 2375 μmol g-1 h-1 in deionized water,simulated seawater,and real seawater,respectively,which exceed that of many carefully designed noble metal Pt containing photocatalyst.This work provides an important verifi-cation that the rational design and construction of homojunction photocatalysts could effectively enhance photocatalytic activity.
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