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Engineering N3C vacancies in hierarchical porous carbon nitride nanosheets for room temperature ultradeep photocatalytic aerobic oxidative desulfurization

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Science China Chemistry 2025年

作者： Yina Nie Weijie Yang Xin wang Xiang Li Lele Wei Xiaolin Bai Lin Liu Feng Fu jun wan College of Chemistry & Chemical Engineering Research Institute of Comprehensive Energy Industrial Technology Shaanxi Key Laboratory of Chemical Reaction Engineering Yan'an University Anhui Engineering Research Center of Carbon Neutrality College of Chemistry and Materials Science Anhui Normal University

The production of ultra-low sulfur clean fuels holds global significance for improving energy efficiency and reducing environmental pollution. Photocatalytic aerobic oxidative desulfurization（PODS） offers an attractive approach to efficiently remove refractory heterocyclic aromatic sulfur compounds under mild conditions. However, the sluggish charge dynamics,insufficient molecule activation, and slow mass transfer within photocatalysts restrict the overall desulfurization efficiency,hindering the widespread application of this technology. Herein, we developed a defective g-C3N4（M1U3CN） photocatalyst with bridged N3Cvacancies and hierarchical porous structures to address these limitations. This catalyst not only demonstrates outstanding dibenzothiophene（DBT） removal efficiency of 99.6% for model oil with high conversion and selectivity but also achieves complete sulfur removal from gasoline as well as 96.7% sulfur removal for distilled diesel at room temperature,successfully achieving ultradeep aerobic oxidative desulfurization. The introduction of rich N3Cvacancies and abundant micromeso-macroporous distribution in M1U3CN enhances kinetic efficiencies by promoting charge carrier separation, mass transfer,and molecular activation simultaneously; resulting in exceptional PODS performance. This work provides a collaborative strategy to overcome kinetic challenges in aerobic oxidative desulfurization via defect and structural engineering of the catalyst.

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2021 Emerging Investigator Issue of Science China Chemistry

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Science China Chemistry 2021年第11期64卷 1811-1816页

作者： Li-jun wan Institute of Chemistry Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

In 2020,*** Chem.(SCC)published an"Emerging Investigator Issue,"featuring the works conducted by young scientists at an early stage of their independent research *** research finding in this issue has showcased the excitement and potential of a new-generation of scientists in pushing forward the development of chemistry and related fields,and has been well-received for its academic value and novel perspective.

关键词： finding Issue featuring

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Unveiling the future of chemistry:the 2023 emerging investigator issue of Science China Chemistry

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Science China Chemistry 2023年第12期66卷 3323-3330页

作者： Li-jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In the dynamic realm of scientific discovery,it is imperative to acknowledge and support the innovative perspectives and groundbreaking research emanating from the next generation of leaders in our *** this end,Scienc... 详细信息

关键词： breaking field chemistry

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2020 emerging investigator issue of Science China Chemistry

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Science China Chemistry 2020年第10期63卷 1331-1335页

作者： Li-jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Emerging Investigator issue features the works conducted by young scientists in the earlier stage of their independent research career, with the potentials to influence the direction in chemistry and related fields. The contributors are selected from the recommendation of senior scientists as well as the editorial board members of Science China Chemistry.

关键词： editorial senior career

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2022 Emerging Investigator Issue of Science China Chemistry

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Science China Chemistry 2022年第11期65卷 2045-2050页

作者： Li-jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

It is always my pleasure to introduce and promote young scientists to the scientific *** this end,Science China Chemistry(SCC)organized special issues for emerging investigators,namely Emerging Investigator Issue[1,2].Starting from 2020,these issues published innovative research work from young scientists who are at an early stage of their independent research *** results in these papers have attracted widespread attention and all authors are highly evaluated by the editorial board.

关键词： Issue young innovative

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Fostering a growing chemistry community: the 2024 emerging investigator issue of Science China Chemistry

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Science China Chemistry 2024年第12期67卷 3897-3905页

作者： Li-jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

To support scientists in the early stages of their independent careers,Science China Chemistry places a high priority on recognizing emerging researchers with the potential to shape the future directions of the *** 2024 Science China Chemistry emerging investigators,selected for their significant contributions and innovative potential,were nominated by our esteemed Editorial Board Members and committee of the National Natural Science Foundation of China.

关键词： Foster directions committee

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Lattice-confined Ru clusters for hydrogen oxidation reaction with high CO-tolerance

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Science China Chemistry 2020年第9期63卷 1169-1170页

作者： Li-jun wan Institute of Chemistry Chinese Academy of SciencesBeijing 100190China

Hydrogen has been considering as a promising renewable energy source and a viable alternative for fossil-fuels in the future[1,2].Hydrogen oxidation reaction(HOR)and its reverse reaction are two significant reactions for applying hydrogen as electrochemical *** the other hand,platinum is believed to be the best electrocatalyst for HOR,although several drawbacks including high cost,scarcity,low CO tolerance,and depressed catalytic activities in alkaline environments,hinder the development of hydrogen application[1].Hence,it is highly desired to develop Pt-free HOR catalysts with high activity,high stability,low cost,and good resistance to CO poisoning[3].

关键词： confined applying desired

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Characteristics of phosphorus fractionated from the sediment resuspension in abrupt expansion flow experiments

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Journal of Environmental Sciences 2010年第10期22卷 1519-1526页

作者： jun wan Ze wang Hezhong Yuan . College of Environmental Science and Engineering Hohai University Nanjing 210098 China College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China. State Key Laboratory of Lake Sediments Process Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210098 China

Phosphorous （P） fraction characteristics in sediment resuspension were investigated under adequately hydrodynamic conditions. Four forms of P in overlying water, including dissolved inorganic P, dissolved total P, total P, and particulate P, and six fractions of P in suspended particulate matter （SPM）, including loosely sorbed P （NH4Cl-P）, redox-sensitive P （BD-P）, aluminum-bound P （Al- P）, organic P （NaOH-nrP）, calcium-bound P （Ca-P） and residual P （Res-P）, were quantified, respectively. Different hydrodynamic conditions resulted in different P form changes. Four states could be ascribed：（1） P desorption by sediment and SPM, and P adsorption by overlying water; （2） P desorption by SPM, and P adsorption by overlying water; （3） P adsorption by SPM, and P desorption by overlying water; and （4） P equilibrium between SPM and overlying water. The contents of P in overlying water acquired peak values in the middle position of the vertical P distribution due to the combined actions of SPM and sediment. P fractions in SPM were in the following order： BD-P 〉 NaOH-nrp 〉 Ca-P 〉 Al-P 〉 Res-P 〉 NH4Cl-P. BD-P in SPM frequently exchanged with P forms in overlying water. Resuspension was favorable to forming Ca-P in SPM.

关键词： phosphorus fractions hydrodynamic conditions suspended particulate matter abrupt expansion flow

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Spatiotemporal pattern formation in parametrically driven two-dimensional Bose–Einstein condensates

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Communications in Theoretical Physics 2024年第12期76卷 150-156页

作者： jun wan Wen Wen Hui-jun Li College of Mechanics and Engineering Science Hohai University Institute of Nonlinear Physics and Department of Physics Zhejiang Normal University Zhejiang Institute of Photoelectronics and Zhejiang Institute for Advanced Light Source Zhejiang Normal University

We investigate spatiotemporal periodic patterns in harmonically trapped Bose–Einstein condensates(BECs) driven by a periodic modulation of the interaction. Resonant with the breathing mode, we show the emergence of a square lattice pattern containing two orthonormal stripes. We study the time evolutions of the lattice patterns for different driving strengths and dissipations. We find that its spatial periodicity and temporal oscillating frequency match the Bogoliubov dispersion, which is the intrinsic property of the system and relevant to the parametric amplification of elementary excitations. In the circumstances of strong driving strength and low dissipation, we further observe the triad interaction and the resulting superlattice state, which are well explained by the nonlinear amplitude equation for superimposed stripes. These results shed light on unexplored nonlinear spatiotemporal dynamics of two-dimensional patterns in harmonically trapped BECs that can pave the way for engineering exotic patterns by state-of-the-art experiments.

关键词： spatio-temporal periodicity square lattice pattern triad interaction

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Rheological model of semisolid Mg_(2)Si/AM60 composites prepared by ultrasonic vibration treatment

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Rare Metals 2022年第8期41卷 2783-2788页

作者： Yuan-Sheng Rao Hong Yan jun wan Department of Materials Processing Engineering School of Mechanical and Electrical EngineeringNanchang UniversityNanchang330031China Key Laboratory of Light Alloy Preparation and Processing in Nanchang City Nanchang330031China

The rheological behavior of semisolid Mg_(2)Si/AM60 composites prepared by ultrasonic vibration treatment was *** effects of primaryα-Mg solid content,the ultrasonic power and the content of reinforcement phase Mg_(2)Si on the apparent viscosity of semisolid composites were *** results show that the apparent viscosity of the semis olid composites increases with the increase in a-Mg solid ***,the apparent viscosity decreases with the increase in ultrasonic power,and the reduction amplitude is higher when the solid content is *** addition,the apparent viscosity increases with the increase in Mg_(2)Si *** on experimental data fitting,the rheological model of semisolid Mg_(2)Si/AM60 composites prepared by ultrasonic vibration was established.

关键词： Semisolid Magnesium matrix composites Ultrasonic vibration Apparent viscosity

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