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Determination of growth kinetics of microorganisms linked with 1,4-dioxane degradation in a consortium based on two improved methods

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Frontiers of Environmental Science & Engineering 2022年第5期16卷 97-107页

作者： Yi Xiong Boya Wang Chao Zhou Huan Chen Gang Chen Youneng Tang Department of Civil and Environmental Engineering FAMU-FSU College of EngineeringFlorida State UniversityTallahasseeFL 32310USA Geosyntec Consultants Inc. Huntington BeachCA 92648USA National High Magnetic Field Laboratory TallahasseeFL 32310USA

The conventional method for determining growth kinetics of microbial consortia relies on the total biomass concentration.This may be inaccurate for substrates that are uncommon in nature and can only be degraded by a small portion of the microbial community.1,4-dioxane,an emerging contaminant,is an example of such substrates.In this work,we evaluated an improved method for determining the growth kinetics of a 1,4-dioxane-degrading microbial consortium.In the improved method,we considered only bacterial taxa whose concentration increase correlated to 1,4-dioxane concentration decrease in duplicate microcosm tests.Using PEST(Parameter Estimation),a modelindependent parameter estimator,the kinetic constants were estimated by fitting the Monod kineticsbased simulation results to the experimental data that consisted of the concentrations of 1,4-dioxane and the considered bacterial taxa.The estimated kinetic constants were evaluated by comparing the simulation results with experimental results from another set of microcosm tests.The evaluation was quantified by the sum of squared relative residual,which was four orders of magnitude lower for the improved method than the conventional method.By further dividing the considered bacterial taxa into oligotrophs and copiotrophs,the sum of squared relative residual further decreased.

关键词： Biodegradation 1,4-Dioxane Kinetics Microbial consortium 16S rRNA

Symmetry-breaking of LiMn_(6) hexatomic-ring in grain surface of Li_(2)MnO_(3)

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Journal of Energy Chemistry 2023年第6期 110-117,I0004页

作者： Lihang wang Shu Zhao Boya Wang Haijun Yu Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China

LiMn_(6) hexatomic-rings act as functional units in Li-rich layered oxides(LLOs),which determine the capacity,voltage,and structural stability of LLOs.However,the symmetry of the LiMn_(6) hexatomic-ring is always broken,especially in the grain surface of LLOs,which will greatly affect its electrochemical performance.Herein,the symmetry-breaking of LiMn_(6) hexatomic-ring in the grain surface of Li_(2)MnO_(3) was studied,and their effect on charge compensation mechanism and structure evolution behavior was thoroughly investigated.The results show that the electrochemical activity of the symmetry-broken LiMn_(6) hexatomic-ring is higher than that of the unbroken LiMn_(6),and the former is more favorable for spinelization on the grain surface.Furthermore,the exposure proportion of crystallographic planes with different symmetry-broken LiMn_(6) hexatomic-ring has also been discussed,which can be adjusted by changing the partial pressure of oxygen.The in-depth understanding of the symmetry-breaking of LiMn_(6) hexatomic-ring will provide more targeted strategies for designing high-performance LLOs cathodes for lithium-ion batteries.

关键词： Li-rich layered oxides LiMn_(6)functional unit Symmetry-breaking Surface structure Density functional theory

Study on Current Trends in the Development of Traditional Chinese Medicine in Australia and Policy Proposals of Internationalization of Traditional Chinese Medicine Education in Future

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Chinese Medicine and Culture 2019年第3期2卷 132-136页

作者： Lei Fang Boya Wang Teaching and Research Department of Traditional Chinese Rehabilitation TherapySchool of Rehabilitation ScienceShanghai University of TCMShanghaiChina School of Rehabilitation Science Concord Repatriation General HospitalSydneyAustralia

With the rapid rise of China’s economy and the deployment of the Belt and Road Initiative,traditional Chinese medicine(TCM),one of the main components of Chinese culture,has become an important aspect of foreign exchange.Therefore,recent research has focused on how to effectively spread TCM culture internationally and improve TCM acceptance.Australia is currently a representative region with decent TCM development.Taking TCM development in Australia as a starting point,this article analyzes the challenges in TCM development,discusses countermeasures to address these issues,and provides recommendations for improving the international development and dissemination of TCM.

关键词： Australia cultural communication education internationalization traditional Chinese medicine

V-substituted pyrochlore-type polyantimonic acid for highly enhanced lithium-ion storage

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Chinese Chemical Letters 2023年第5期34卷 539-547页

作者： Haoyu Fang Kai Yong Boya Wang Kaipeng Wu Yun Zhang Hao Wu College of Materials Science and Engineering Sichuan UniversityChengdu 610064China

Pyrochlore-structured polyantimonic acid(PAA)is a potential high-capacity electrode material,but its innately poor electroconductivity(~10^(-10)S/cm)seriously impairs its electrochemical reversibility for lithium-ion storage.Herein,we report design and synthesis of a novel V-substituted PAA(PAA-V),where V^(5+)are introduced to partially replace Sb^(5+).Owing to identical valence and close ionic radius relative to Sb^(5+),the V^(5+)cation can constitute the covalent VO_6octahedra framework without changing the pyrochlore crystal structure of PAA.As a result,the V^(5+)-substitution is capable to modulate the electronic structure of PAA with significantly improved electrical conductivity(~10^(-6)S/cm for PAA-V)and meanwhile decreases the size of crystals with reduced diffusion length for Li^(+)-ions.With varying the ratio of V^(5+)-substitution,the PAA-V with optimized substitution molar ratio(18%)exhibits the best lithium-ion storage performance,delivering a long cycling life with high reversible capacity(731 m Ah/g after 1200cycles at 1 A/g)and outstanding rate capability(279 mAh/g at 15 A/g).More importantly,by pairing the PAA-V as anode and commercial LiFePO_(4)as cathode,the full cell with a limited negative/positive capacity ratio of 1.2 exhibits decent cycling stability at 1 C after 150 cycles with 85.5%capacity retention.

关键词： Lithium-ion batteries Anode materials Polyantimonic acid Element substitution Electrochemical reaction mechanism

Mn-based cathode materials for rechargeable batteries

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Science China Chemistry 2024年第1期67卷 87-105页

作者： Xu Zhang Shiqi Liu Boya Wang Guoqing wang Haozhe Du Xuanyu wang Haidong Zhang Shu Zhao Lin wang Haijun Yu Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Create Energy&Benefit Future Co.Ltd. Beijing 100176China

The rapid expansion of renewable energies asks for great progress of energy-storage technologies for sustainable energy supplies,which raises the compelling demand of high-performance rechargeable batteries.To satisfy the huge demand from the coming energy-storage market,the resource and cost-effectiveness of rechargeable batteries become more and more important.Manganese(Mn)as a key transition element with advantages including high abundance,low cost,and low toxicity derives various kinds(spinels,layered oxides,polyanions,Prussian blue analogs,etc.)of high-performance Mn-based electrode materials,especially cathodes,for rechargeable batteries ranging from Li-ion batteries,Na-ion batteries,aqueous batteries,to multivalent metal-ion batteries.It is anticipated that Mn-based materials with Mn as the major transition-metal element will constitute a flourishing family of Mn-based rechargeable batteries(Mn RBs)for large-scale and differentiated energy-storage applications.On the other hand,several critical issues including Jahn-Teller effect,Mn dissolution,and O release greatly hinder the pace of Mn RBs,which require extensive material optimizations and battery/system improvements.This review aims to provide an investigation about Mn-based materials and batteries for the coming energy-storage demands,with compelling issues and challenges that must be overcome.

关键词： manganese cathode materials Mn-based rechargeable batteries energy storage

Suppression of voltage decay through adjusting tap density of lithium-rich layered oxides for lithium ion battery

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Journal of Materials Science & Technology 2020年第23期58卷 107-113页

作者： Muhammad Zubair Errui wang Yinzhong wang Boya Wang Lin wang Yuan Liang Haijun Yu College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China

The voltage decay of lithium-rich layered oxides(LLOs)is still one of the key challenges for their application in commercial battery although these materials possess the advantages of high specific capacity and low cost.In this work,the relationship between voltage decay and tap density of LLOs has been focused.The voltage decay can be significantly suppressed with the increasing tap density as well as the homogenization of the primary or secondary particle size of agglomerated spherical LLOs.Experimental results have shown that an extreme small voltage decay of 0.98 m V cycle^(-1)can be obtained through adjusting the tap density of agglomerated spherical LLOs to 1.99 g cm^(-3),in which the size of primary and secondary particles are uniform.Our work offers a new insight towards the voltage decay and capacity fading of LLOs through precursor preparation process,promoting their application in the real battery in the future.

关键词： Lithium-rich layered oxides Tap density Agglomerated spherical particle Voltage decay Cycle stability

澳大利亚中医药发展现状调查及中医药教育未来国际化传播的建议与对策

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澳大利亚中医药发展现状调查及中医药教育未来国际化传播的建议与...

Third-order polynomial model for analyzing stickup state laminated structure in flexible electronics

第四届江浙沪皖医学教育年会暨2020年浙江省医学会医学...

作者：方磊 Boya Wang 上海中医药大学康复医学院悉尼协和荣军总医院

随着中国经济迅速崛起,一带一路的战略部署,作为中国文化主要载体之一的中医药文化是对外交流的重要环节。如何更加有效的在国际上进行中医药文化传播,提高各国人民对中医药接受度是关注的焦点。澳大利亚是当前世界上中医药发展较好的地... 详细信息

随着中国经济迅速崛起,一带一路的战略部署,作为中国文化主要载体之一的中医药文化是对外交流的重要环节。如何更加有效的在国际上进行中医药文化传播,提高各国人民对中医药接受度是关注的焦点。澳大利亚是当前世界上中医药发展较好的地区,本文以澳大利亚中医药发展为切入点,剖析中医药发展过程其中存在问题,探讨相应的对策,为中医药更好的国际化发展和传播提供一个思路。

关键词：中医药教育国际化文化传播澳大利亚

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Acta Mechanica Sinica 2018年第1期34卷 48-61页

作者： Xianhong Meng Zihao wang boya Liu Shuodao wang School of Aeronautic Science and Engineering Beihang University Beijing 100191 China School of Mechanical and Aerospace Engineering Oklahoma State University Stillwater OK 74078 USA

Laminated hard-soft integrated structures play a significant role in the fabrication and development of flexible electronics devices. Flexible electronics have advantageous characteristics such as soft and light-weight, can be folded,twisted, flipped inside-out, or be pasted onto other surfaces of arbitrary shapes. In this paper, an analytical model is presented to study the mechanics of laminated hard-soft structures in flexible electronics under a stickup state. Thirdorder polynomials are used to describe the displacement field,and the principle of virtual work is adopted to derive the governing equations and boundary conditions. The normal strain and the shear stress along the thickness direction in the bimaterial region are obtained analytically, which agree well with the results from finite element analysis. The analytical model can be used to analyze stickup state laminated structures, and can serve as a valuable reference for the failure prediction and optimal design of flexible electronics in the future.

关键词： Flexible electronics Stickup state Third-order polynomials Virtual work principle

Conversion electrochemistry of copper selenides for robust and energetic aqueous batteries

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Carbon Energy 2023年第2期5卷 85-93页

作者： Yichun wang Boya Wang Jinshu Zhang Dongliang Chao Jiangfeng Ni Liang Li Jiangsu Key Laboratory of Thin Films School of Physical Science and TechnologyCenter for Energy Conversion Materials and Physics(CECMP)Soochow UniversitySuzhouJiangsuChina Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsState Key Laboratory of Molecular Engineering of PolymersSchool of Chemistry and MaterialsFudan UniversityShanghaiChina

The development of highly safe and low-cost aqueous batteries is of great significance in the background of carbon neutrality.However,the practical deployment of aqueous batteries has been plagued due to their relatively low capacity and poor cycling stability.Herein,we propose unique conversion electrochemistry of copper selenides for robust and energetic aqueous charge storage.In situ X-ray diffraction and operando Raman techniques reveal a reversible transformation from CuSe to Cu_(2)Se through the intermediates of Cu_(3)Se_(2) and Cu_(1.8)Se.Such a conversion process activates the redox carrier of Cu^(2+)ion and delivers a remarkable rate capability of 285 mAh g^(-1) at 20 A g^(-1) and electrochemical durability up to 30,000 cycles.Furthermore,Cu^(2+)and H+coinsertion chemistry is proposed to facilitate the conversion process.As a proof-of-concept,a hybrid aqueous pouch cell coupling CuSe//Zn is capable of affording maximum energy and power densities of 190 Wh kg^(-1) and 1366W kg^(-1),respectively.

关键词： aqueous battery conversion electrochemistry Cu-ion battery Se-based electrode