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Confining carbon dots in amino-functionalized mesoporous silica:n→π^(*) interaction triggered deep-red solid-state fluorescence

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Nano Research 2023年第3期16卷 4170-4177页

作者： Hongyue Zhang Qingyi Li Shuo wang Xiaowei Yu bolun wang Guangrui Chen Li Ren Jiyang Li Mingxing Jin Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China Key Laboratory for Molecular Enzymology and Engineering The Ministry of EducationJilin UniversityChangchun 130012China International Center of Future Science Jilin UniversityChangchun 130012China

Deep-red and near-infrared emissive carbon dots(CDs)are highly desired for bioimaging,especially in deep tissue imaging,but they are extremely rare and the known ones usually suffer from low-efficient fluorescence in water and aggregation-induced fluorescence quenching in solid *** this work,CDs with intriguing solvent-dependent and two-photon fluorescence emissions have been prepared by a facile solvothermal *** characterizations reveal that there is an n→π*interaction between the carboxyl functional groups on CDs and the electron donor groups in solvent,which leads to the increase of energy density of CDs and the decrease of energy level,resulting in the red shift of luminescence with enhanced electron donating ability of *** by this finding,mesoporous silica nanoparticles(MSNs)with suitable pore size and low biological toxicity are modified by amino groups to confine CDs,thus the deep-red fluorescence emission is achieved both in solid state and in water facilitated by the n→π*interaction of *** as-prepared CDs@EDA-MSN composite exhibits high-efficient fluorescence with 650 nm wavelength,low toxicity,and good biocompatibility,which endow them a promising application in bio-imaging.

关键词： carbon dots mesoporous silica deep-red fluorescence donor-acceptor modulation bioimaging

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电力调度与电网运行安全策略分析

电子技术（上海） 2024年第2期53卷 98-99页

作者：闫朝阳杨康丁超杰王博仑江苏省电力有限公司电力调度控制中心江苏210024

阐述电力调度控制中心管理的特点,分析存在的安全问题,提出优化运行具体策略,包括严格执行制度、提高安全意识、强化规范管理、开展电网安全维护、加强技术培训和建立绩效考核体系。

关键词：电网系统调度管理绩效考核体系

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含电动汽车集群的微电网多时间尺度优化调度

分布式能源 2024年第3期9卷 21-30页

作者：杨康石璐杉周航王钊洋王博仑周霞唐昊国网江苏省电力有限公司江苏省南京市210008 南瑞集团电网安全稳定控制技术分公司江苏省南京市211000 南京邮电大学江苏省南京市210023

电动汽车放电时可作为电网的一种分布式储能装置,参与缓解高比例新能源接入微电网的供电压力。基于多时间尺度下分时电价的特点,提出一种考虑电动汽车集群的微电网多时间尺度优化调度方法。在日前调度阶段,基于分时电价对微电网内部储... 详细信息

电动汽车放电时可作为电网的一种分布式储能装置,参与缓解高比例新能源接入微电网的供电压力。基于多时间尺度下分时电价的特点,提出一种考虑电动汽车集群的微电网多时间尺度优化调度方法。在日前调度阶段,基于分时电价对微电网内部储能、可中断负荷、可转移负荷等设备出力进行优化调度;在日内优化调度阶段,将电动汽车集群纳入到微电网能量调度中来,通过分析各电动汽车集群的调度潜力来实现合理的充放电。为验证所提方案的有效性,选取不同的用电峰平谷时段分时电价,让电动汽车集群参与微电网能量调度,结果证明考虑电动汽车集群参与的微电网多时间尺度优化调度能充分利用电动汽车集群的储能资源,提升微电网调度运行的灵活性和经济性。

关键词：微电网多时间尺度电动汽车集群分时电价优化调度

横江流域pH值时空变化特征与浮游植物关系研究

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环境科学与管理 2024年第5期49卷 107-112页

作者：汪伯伦陈然罗毅胡军钱丽萍黄山市生态环境执法监测站安徽黄山245041 黄山学院生命与环境科学学院安徽黄山245021

文章以横江流域pH值为研究对象,分析了pH值的时空变化特征,以及浮游植物群落对pH值的影响,探讨了pH值变化的影响因素以及内在的机理。研究结果表明:横江流域pH值从上游到下游逐渐升高的趋势,7、8月份pH值最高为9.1,4-6月份最低为7.5。影... 详细信息

文章以横江流域pH值为研究对象,分析了pH值的时空变化特征,以及浮游植物群落对pH值的影响,探讨了pH值变化的影响因素以及内在的机理。研究结果表明:横江流域pH值从上游到下游逐渐升高的趋势,7、8月份pH值最高为9.1,4-6月份最低为7.5。影响pH值变化主要因素是溶解氧、叶绿素a、水温。横江流域主要的浮游植物的种属7门60属,其中硅藻门最为丰富,优势种也是以硅藻门为主;春季以硅藻为主,夏季以蓝藻为主,秋季以绿藻、硅藻为主,可以看出浮游植物群落变化导致了水体pH值的季节性的变化,因此,生物作用是横江流域pH值变化的主要因素。

关键词：横江流域河流pH值浮游植物相关性研究

Effects of soaking process on arsenic and other mineral elements in brown rice

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Food Science and Human Wellness 2020年第2期9卷 168-175页

作者： Fan Zhang Fengying Gu Huili Yan Zhenyan He bolun wang Hao Liu Tingting Yang Feng wang Institute of Food Science and Technology Chinese Academy of Agricultural SciencesBeijing 100193China Key Laboratory of Agro-Products Processing Ministry of AgricultureBeijing 100193China Graduate School of Chinese Academy of Agricultural Sciences Beijing 100081China Institute of Botany Chinese Academy of SciencesBeijing 100093China

One of the main food crops in the world,rice can accumulate high levels of arsenic from flooded paddy soils,which seriously threatens human ***,a common processing method for brown rice products,especially for brown rice noodles,was investigated in this *** rice(Dao Hua Xiang No.2)and Indica rice(Ye Xiang You No.3)were selected for studying the effects of soaking on arsenic concentrations,species,and *** revealed that soaking can efficiently remove arsenic in these two rice varieties,and the main part of removal is endosperm with the maximal rate of about 40%.Inorganic arsenic(I-As)(about 85%)is the main species of arsenic ***,the variations of four other elements(i.e.,Mg,Ca,Zn,and Fe)were ***,the findings of this study indicate that soaking can efficiently remove arsenic in brown rice under controlled soaking conditions,which thereby reduces the arsenic intake for brown rice customers.

关键词： Brown rice Soaking Total arsenic Arsenic species Distribution

Nutritive Equilibrium in Rice Plant Populations for High Yield

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Pedosphere 1999年第1期9卷 77-82页

作者： wang bolun LIU XINAN YU GUIRUI SU ZHENGSHU and wang SU (Shenyang Agricultural University, Shenyang 110161, China) 沈阳农业大学辽宁沈阳 110161 沈阳农业大学辽宁沈阳

The effects of nitrogen, phosphorus and potassium application level, seed rate and transplanting density on the growth and development of rice plants were studied to find out nutrient status in high-yielding rice plants and to increase grain yield by adequate fertilization. There was an equilibrium relationship among nutrient elements for high-yielding rice plant populations. The equilibrium index of nutrient amount, content and distribution in high-yielding rice plants should be generally greater than-2 but less than 2. The optimum nutritive proportion of nitrogen: phosphorus: potassium assimilated by the plants was about 10: 2: 9 at the ripening stage. But the content and the proportion varied with the growth stages. Therefore, the nutrient in rice plant populations should be in a dynamic equilibrium, so as to achieve high yield.

关键词： high yield nutritive equilibrium rice plant populations

Insights into the role of oxygen-containing functional groups on carbon surface in water–electricity generation

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Nano Research 2024年第7期17卷 6645-6653页

作者： Wan Xue Zongbin Zhao Honghui Bi bolun Zhang Xuzhen wang Jieshan Qiu State Key Laboratory of Fine Chemicals Liaoning Key Laboratory for Energy Materials and Chemical EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China State Key Laboratory of Fine Chemicals Liaoning Key Laboratory for Energy Materials and Chemical EngineeringSchool of ChemistryDalian University of TechnologyDalian 116024China State Key Laboratory of Chemical Resource Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China

A deep understanding of the electricity generation mechanism from the interaction between water molecules and carbon material surfaces is attractive for next-generation water-based energy conversion and storage ***,an asymmetric generator was assembled based on functionalized carbon nanotubes films to investigate the relative contribution from various oxygen functional groups on carbon surface to the water-electrical *** and calculations demonstrate that the electricity mainly originates from the water molecule adsorption by carboxyl groups and dissociation of functional groups on carbon surface,which leads to the formation of electrical double layers at *** device allows the electricity generation with a variety of water sources,such as deionized water,tap water,as well as *** particular,the generator based on carboxyl carbon nanotubes can induce a voltage of over 200 mV spontaneously in natural seawater with the power density of about 0.11 mW·g^(−1).High voltages can be achieved easily through the series-connection strategy to power electronic products such as a liquid crystal *** work reveals the dominant role of carboxyl groups in carbon-based water–electricity conversion and is expected to offer inspiration for the preparation of carbon materials with high electrical performance.

关键词： electricity generation water adsorption dissociation carboxyl groups carbon nanotubes

Direct laser patterning of two-dimensional lateral transition metal disulfide-oxide-disulfide heterostructures for ultrasensitive sensors

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Nano Research 2020年第8期13卷 2035-2043页

作者： bolun wang Hao Luo Xuewen wang Enze wang Yufei Sun Yu-Chien Tsai Jinxuan Dong Peng Liu Huanglong Li Yong Xu Sefaattin Tongay Kaili Jiang Shoushan Fan Kai Liu State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing100084China State Key Laboratory of Low-Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing100084China Department of Precision Instrument Center for Brain Inspired Computing ResearchTsinghua UniversityBeijing100084China RIKEN Center for Emergent Matter Science(CEMS) WakoSaitama351-0198Japan School for Engineering of Matter Transport and EnergyArizona State UniversityTempeAZ85287USA

Two-dimensional(2D)heterostructures based on the combination of transition metal dichalcogenides(TMDs)and transition metal oxides(TMOs)have aroused growing attention due to their integrated merits of both components and multiple ***,nondestructive approaches of constructing TMD-TMO heterostructures are still very ***,we develop a novel type of lateral TMD-TMO heterostructure(NbS2-Nb2O5-NbS2)using a simple lithography-free,direct laser-patterning *** perfect contact of an ultrathin TMO channel(Nb2O5)with two metallic TMDs(NbS2)electrodes guarantee strong electrical signals in a two-terminal *** from sensing mechanisms in separate TMOs or TMDs,this sensor works based on the modulation of surface conduction of the ultrathin TMO(Nb2O5)channel through an adsorbed layer of water *** sensor thus exhibits high selectivity and ultrahigh sensitivity for room-temperature detection of NH3(ΔR/R=80%at 50 ppm),superior to the reported NH3 sensors based on 2D materials,and a positive temperature coefficient of resistance as high as 15%–20%/℃.Bending-invariant performance and high reliability are also demonstrated in flexible versions of *** work provides a new strategy of lithography-free processing of novel TMD-TMO heterostructures towards high-performance sensors,showing great potential in the applications of future portable and wearable electronics.

关键词： two-dimensional heterostructure niobium disulfide niobium oxide laser patterning sensor

Reversible lithium storage in sp^(2) hydrocarbon frameworks

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Journal of Energy Chemistry 2022年第3期31卷 161-167,I0006页

作者： Zhangxiang Hao Junrun Feng Yiyun Liu Liqun Kang bolun wang Junwen Gu Lin Sheng Ruoyu Xu Sushila Marlow Dan J.L.Brett Yunhui Huang Feng Ryan wang Materials and Catalysis Laboratory Department of Chemical EngineeringUniversity College LondonLondon WC1E 7JEUnited Kingdom School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina Electrochemical Innovation Lab Department of Chemical EngineeringUniversity College LondonLondon WC1E 7JEUnited Kingdom Department of Chemistry University College LondonLondon WC1H 0AJUnited Kingdom

Polymer materials offer controllable structure-dependent performances in separation,catalysis and drug *** molecular structures can be precisely tailored to accept Li^(+)for energy storage *** the design of sp^(2)carbon-based polyphenylene(PPH)with high lithium-ion uptakes and long-term stability is ***-PPH(L-PPH)exceeds the performance of crosslink-PPH(C-PPH),due to the fact that it has an ordered lamellar structure,promoting the Li^(+)intercalation/deintercalation *** L-PPH cell shows a clear charge and discharge plateau at 0.35 and 0.15 V ***^(+)/Li,respectively,which is absent in the C-PPH *** Li^(+)storage capacity of L-PPH is five times that of the *** reversible storage capacity is further improved to 261 m Ah g;by functionalizing the L-PPH with the–SO_(3)H *** addition,the Li-intercalated structures of C-PPH and L-PPH are investigated via near-edge X-ray absorption fine structure(NEXAFS),suggesting the high reversible Li^(+)–C=C bond interaction at *** strategy,based on new insight into sp^(2)functional groups,is the first step toward a molecular understanding of the structure storage-capacity relationship in sp^(2)carbon-based polymer.

关键词： Lithium-ions battery Organic anode Topological structure sp^(2)hydrocarbon