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Chemical Research in Chinese Universities 2022年第6期38卷 1387-1393页

作者： WU Zhifang liang zhishan HE Ziqian WANG Tianqi XIAO Ren HAN Fangjie ZHAO Zhengzheng HAN Dongfang HAN Dongxue NIU Li School of Civil Engineering Center for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou510006P.R.China Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety Anti-Drug Technology Center of Guangdong ProvinceGuangzhou510230P.R.China

We report a photoelectrochemical(PEC)sensor for selective detection of ascorbic(AA)by introducing Z-scheme Bi_(2)S_(3)@nitrogen doped graphene quantum dots(Bi_(2)S_(3)@NGQDs)heterojunctions as efficient photoactive *** Bi_(2)S_(3)@NGQDs were successfully prepared by a simple hydrothermal process,and the microstructures and components were investigated by various characterized *** photocurrent of the Bi_(2)S_(3)@NGQDs-based sensor increased significantly in the presence of AA and showed excellent selectivity and stability for AA detection in the presence of some other antioxidants and small molecules.A wide linear range of 0.1–5µmol/L and 5–1380µmol/L was achieved for the AA detection with a detection limit of 36 nmol/L(S/N=3).Moreover,the proposed PEC sensor achieved the determination of AA in real red peppers and commercially available vitamin C tablets samples.

关键词： Photoelectrochemical sensor Ascorbic acid Z-Scheme heterojunction

Recent progress in intermetallic nanocrystals for electrocatalysis:From binary to ternary to high-entropy intermetallics

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SmartMat 2023年第4期4卷 145-177页

作者： Jiawei Liu Carmen Lee Yue Hu zhishan liang Rong Ji Xiang Yun Debbie Soo Qiang Zhu Qingyu Yan School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

Developing sustainable and clean energy-conversion techniques is one of the strategies to simultaneously meet the global energy demand,save fossil fuels and protect the environment,in which nanocatalysts with high activity,selectivity and durability are of great *** nanocrystals,featuring their ordered atomic arrangements and predictable electronic structures,have been recognized as a type of active and durable catalysts in energy-related *** this minireview,the very recent progress in the syntheses and electrocatalytic applications of noble metal-based intermetallic nanocrystals is *** synthetic strategies,including the conventional thermal annealing approach and its diverse modifications,as well as the wet-chemical synthesis,for the construction of binary,ternary and high-entropy intermetallic nanocrystals have been discussed with representative examples,highlighting their strengths and ***,their electrocatalytic applications toward oxygen reduction reaction,small molecule oxidation reactions,hydrogen evolution reaction,CO_(2)/CO reduction reactions,and nitrogen reduction reaction are discussed,with the emphasis on how the ordered intermetallic structures contribute to the enhanced *** conclude the minireview by addressing the current challenges and opportunities of intermetallic nanocrystals in terms of syntheses and electrocatalytic applications.

关键词： binary intermetallic electrocatalysis high-entropy intermetallic intermetallic nanocrystals ternary intermetallic

Simultaneously optimizing exciton diffusion length and nonradiative energy loss in organic solar cells via ternary strategy

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Science China Chemistry 2024年第9期67卷 3004-3011页

作者： Huanxiang Jiang Hao Lu Zezhou liang Yonghai Li Guangliu Ran Chenyu Han Yuqiang Liu Hongxiang Li Xichang Bao zhishan Bo College of Textiles and Clothing State Key Laboratory of Bio-fibers and Eco-textiles Qingdao University Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Photonic Technique for InformationSchool of Electronics Science & Engineering Faculty of Electronic and Information Engineering Xi'an Jiaotong University Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Laboratory of Solar Energy Shandong Energy Institute Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum Studies Beijing Normal University College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University

Significant nonradiative energy loss and short exciton diffusion length in organic solar cells(OSCs) are two major obstacles to achieving state-of-the-art efficiencies. It is crucial to conduct a study on the intensive mechanism and improvement strategies for future breakthroughs in the efficiency of OSCs. In this work, nonradiative energy loss and exciton diffusion length are optimized simultaneously by incorporating a guest acceptor(LA15) to construct ternary OSC(D18:L8-BO:LA15). Firstly, LA15 exhibits excellent compatibility with the host acceptor L8-BO, and effectively improves the fluorescence quantum efficiency(FLQY),resulting in suppressed non-radiative energy loss. Moreover, LA15 effectively prolongs the fluorescent lifetime of the acceptor phase from 0.85 to 1.12 ns, leading to larger exciton diffusion length, which is beneficial for reducing geminate ***, the addition of LA15 optimizes the crystallinity of the active layer with amplified charge transport capacity. As a result,the optimized D18:L8-BO:LA15 device achieves ultralow nonradiative energy loss of 0.18 e V and improved fill factor(FF) with high efficiency up to 19.13%. These results highlight the crucial roles of regulating FLQYand exciton lifetime in achieving highefficiency OSCs.

关键词： organic solar cells nonradiative energy loss exciton lifetime exciton diffusion length

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Genesis of the Nuri Cu-W-Mo Deposit,Tibet,China:Constraints from in situ Trace Elements and Sr Isotopic Analysis of Scheelite

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 117-131页

作者： WANG Yiyun WU zhishan CHEN Wenqing DU Qing’an TANG Liwei SHI Hongzhao MA Guotao ZHANG Zhi liang Wei WU Bo MIAO Hengyi Chengdu Center China Geological Survey(Geoscience Innovation Center of Southwest China)Chengdu 610081China The Second Geological Institute of China’s Metallurgical Geology Bureau Fuzhou 351111China

The Nuri deposit is the only Cu-W-Mo polymetallic deposit with large-scale WO3 resources in the eastern section of the Gangdese metallogenic belt,Tibet,***,the genetic type of this deposit has been controversial since its *** on a study of the geological characteristics of the deposit,this study presents mineralization stages,focusing on the oxide stage and the quartz-sulfide stage where scheelite is mainly formed,referred to as Sch-A and Sch-B,*** LA-ICP-MS trace element and Sr isotope analyses,the origin,evolutionary process of the oreforming fluid and genesis of the ore deposit are *** Electron Microscope-Cathodoluminescence(SEMCL)observations reveal that Sch-A consists of three generations,with dark gray homogenous Sch-A1 being replaced by relatively lighter and homogeneous Sch-A2 and Sch-A3,with Sch-A2 displaying a gray CL image color with vague and uneven growth bands and Sch-A3 has a light gray CL image color with hardly any growth *** contrast,Sch-B exhibits a‘core-rim’structure,with the core part(Sch-B1)being dark gray and displaying a uniform growth band,while the rim part(Sch-B2)is light gray and *** normalized distribution pattern of rare earth elements in scheelite and Sr isotope data suggest that the early ore-forming fluid in the Nuri deposit originated from granodiorite porphyry and,later on,some country rock material was mixed in,due to strong water-rock *** the O-H isotope data further indicates that the ore-forming fluid in the Nuri deposit originated from magmatic-hydrothermal sources,with contributions from metamorphic water caused by water-rock interaction during the mineralization process,as well as later meteoric *** intense water-rock interaction likely played a crucial role in the precipitation of scheelite,leading to varying Eu anomalies in different generations of scheelite from the oxide stage to the quartz-sulfide stage,while also causing a

关键词： trace elements in situ Sr isotopes tungsten mineralization Gangdese metallogenic belt Tibet

Label-free photoelectric sensor for lactic acid determination in human sweat

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Chinese Chemical Letters 2023年第4期34卷 474-478页

作者： Hao Gu Guoxin Dai Siyu Liu Yanbing Zhai Qian Xu Hongqiang Wu Wei Xu School of Life Science Beijing Institute of TechnologyBeijing 100081China School of Medical Technology Beijing Institute of TechnologyBeijing 100081China National Institute of Metrology Beijing 100029China Biotree Metabolomics Technology Research Center Shanghai 201800China

A label-free lactic acid sensor has been successfully developed by using a Dysprosium single crystal-based photoelectric potential technique via Dy-SCN/FTO electrode. Interestingly, the proposed sensor demonstrated excellent performance for L-lactic acid analysis with a wide linear range of 0.0196~16.31 mmol/L,the detection limit of as low as 3.20 μmol/L as well as an advisable stability. The feasibility of this strategy was also verified by practical application towards human sweat samples. The mechanism studies indicated that lactic acid molecules specifically bind to the surface of semiconductor materials, which alters the charge distribution of the electrode surface and subsequently results in band bending/photoelectric potential changes. The theoretical formula for this photoelectric chemistry(PEC) strategy was then derived according to charge balance theory. We believe that the proposed Dy-SCN/FTO sensor would open a new way for rapid, non-invasive L-lactic acid level evaluation during human physical condition monitoring.

关键词： Mass spectrometry Instrumentation LC-MS Immunosuppressants

基于欧拉-拉格朗日系统模型的ASVG无源非线性综合控制

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电力自动化设备 2009年第3期29卷 61-64页

作者：谢争先梁志珊张化光东北大学信息科学与工程学院辽宁沈阳110004 中国石油大学机电工程学院北京102249

先进静止无功发生器(ASVG)的控制方法是影响其补偿性能和效果的重要因素,其传统PI控制器结构简单,参数设计容易,但动态稳定性较差。为提高系统稳定性,将ASVG的数学模型用Euler-Lagrange系统表示,采用无源控制(PBC),设计ASVG的PBC控制器... 详细信息

先进静止无功发生器(ASVG)的控制方法是影响其补偿性能和效果的重要因素,其传统PI控制器结构简单,参数设计容易,但动态稳定性较差。为提高系统稳定性,将ASVG的数学模型用Euler-Lagrange系统表示,采用无源控制(PBC),设计ASVG的PBC控制器,从理论上保证ASVG系统的Lyapunov函数稳定性,但当系统出现干扰时ASVG安装点的系统交流电压和电容器直流电压波动太大。基于此,提出ASVG无源非线性综合控制方案,即:电流内环控制采用基于PBC的控制,ASVG安装点交流电压和电容器直流电压的双外环控制均采用PI控制,既保持了所提出的综合控制器能在大干扰下提高系统的稳定性,也能够快速有效地将ASVG安装点的系统电压和电容器直流电压控制在允许的范围内波动。具有ASVG的单机-无穷大系统的Matlab仿真结果表明了控制系统模型的正确性和所设计的综合控制器的有效性。

关键词：先进静止无功发生器无源控制欧拉-拉格朗日系统 Lyapunov函数动态稳定性干扰

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中国东部沿海管道海岸-断裂带复合效应

石油科学通报 2023年第5期8卷 660-670页

作者：方莉夏鹏程梁志珊熊树海毕武喜蓝卫中国石油大学(北京)信息科学与工程学院北京102249 中石油管道科技研究中心廊坊065000

低频扰动地磁场在大地中感应出地磁感应电流(GIC)和地面感应电势(ESP),直接影响埋地管道管地电位(PSP)。为研究中国东部沿海地区海岸和断裂带复合效应对日东线管道PSP的影响,基于傅里叶变换和反变换的思想提出了管道傅里叶-有限元法,该... 详细信息

低频扰动地磁场在大地中感应出地磁感应电流(GIC)和地面感应电势(ESP),直接影响埋地管道管地电位(PSP)。为研究中国东部沿海地区海岸和断裂带复合效应对日东线管道PSP的影响,基于傅里叶变换和反变换的思想提出了管道傅里叶-有限元法,该方法采用地面磁场时频转换理论,建立低频地磁扰动下管道PSP计算模型以获取实时信息。本文首先建立了三维海岸-断裂带理论模型探索沿海地区的电场分布与断裂带电导率之间的关系;然后根据大地电磁测深数据构建了中石油日东线所在地区的大地三维电导率模型,应用地磁台磁场数据作为大地导体边界条件计算磁扰动期间实时管道PSP时空分布,以2016年10月12-14日期间的磁扰动为例对日东线PSP的计算值和实测值进行对比分析。在空间分布特性上分析了管道PSP的两种基本分布形态以及重要节点处受管道参数变化的影响,在时间分布特性上不仅验证了计算模型的准确性,还揭示了海岸-断裂带复合效应对沿海管道PSP的影响,为管道腐蚀防护提供了理论依据。

关键词：海岸-断裂带管道傅里叶-有限元法管地电位时空分布

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陕北地区长7页岩油高效开发技术研究

石化技术 2022年第2期29卷 159-160页

作者：梁志山孙嘉泽杨敏周莉长庆油田第三采油厂宁夏银川750006

页岩油是亟待开发利用的一种非常规油气资源,陕北长7页岩油资源丰富,自2010年起,经历了丛式井注水开发、水平井注水开发、大井距体积压裂水平井超前补能开发、小井距大井丛体积压裂水平井超前补能开发等阶段,均取得了一定效果。本文通... 详细信息

页岩油是亟待开发利用的一种非常规油气资源,陕北长7页岩油资源丰富,自2010年起,经历了丛式井注水开发、水平井注水开发、大井距体积压裂水平井超前补能开发、小井距大井丛体积压裂水平井超前补能开发等阶段,均取得了一定效果。本文通过研究页岩油开发方式、水平段长度、水平井井距、初期合理流压等主要参数,制定出陕北地区长7页岩油合理的开发技术政策,旨在为同类油藏的高效开发提供一定的技术支持。

关键词：水平井流压产量

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基于单周控制的三相光伏并网发电系统

电气自动化 2008年第5期30卷 7-11页

作者：于小辉梁志珊中国石油大学北京100000

单周控制具有结构简单、控制精度高、响应速度快等优点,三相并网逆变器的单周控制模型,将一个周波分为六个区间,每个区间只有两个开关器件处在高频开关状态下,减小了器件的开关频率,降低了并网电流的谐波畸变率,实现了单位功率因数输出... 详细信息

单周控制具有结构简单、控制精度高、响应速度快等优点,三相并网逆变器的单周控制模型,将一个周波分为六个区间,每个区间只有两个开关器件处在高频开关状态下,减小了器件的开关频率,降低了并网电流的谐波畸变率,实现了单位功率因数输出。文中提出一种基于单周控制的防"孤岛效应"策略,有效地抑制了"孤岛效应"的产生。直流侧的 Boost 升压电路也采用单周控制,稳定了直流侧的电压,简化了电路,增强了实时性。最后通过仿真验证此方法的正确性。

关键词：单周控制并网 Boost 光伏孤岛效应

鼠尾振动暴露大鼠血液中前列环素和血栓素的变化

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环境与职业医学 2022年第11期39卷 1226-1230页

作者：陈子宇魏诺言梁芷珊黄惠民胡秀文王军义陈青松杨虹雨广东药科大学公共卫生学院广东广州510224

[背景]长期接触手传振动暴露会导致手臂振动综合征,表现之一是手臂外周血液循环障碍。血中前列环素I2(PGI2)及血栓素A2(TXA2)表达改变可能是振动致手臂振动综合征的重要机制之一。[目的]揭示大鼠鼠尾接触振动对血浆中PGI2、TXA2表达量... 详细信息

[背景]长期接触手传振动暴露会导致手臂振动综合征,表现之一是手臂外周血液循环障碍。血中前列环素I2(PGI2)及血栓素A2(TXA2)表达改变可能是振动致手臂振动综合征的重要机制之一。[目的]揭示大鼠鼠尾接触振动对血浆中PGI2、TXA2表达量的影响,探讨大鼠血浆中二者比值变化与鼠尾振动的关联。[方法]50只SPF级雄性SD大鼠,利用随机区组法分为对照组、1 d接振组、3 d接振组、7 d接振组、14 d接振组共5组,每组10只;大鼠放置于大鼠固定器中,摆放到固定台相应位置,大鼠尾巴置于振动仪用医用胶带固定好,固定台与振动仪不接触,使固定器之间、鼠尾之间不重叠;暴露剂量为125 Hz、5.9 m·s^(-2)、4 h·d^(-1),振动方向是线性垂直振动;振动暴露结束取腹主动脉血,利用酶联免疫吸附试验检测血管因子PGI2、TXA2及其水解产物6-酮-前列腺素F1α(6-keto-PGF1α)、血栓素B2(TXB2)的表达量,并计算6-keto-PGF1α/TXB2值。利用Spearman秩相关分析血管因子的表达量是否与振动累积时间相关。[结果]1 d组、3 d组、7 d组、14 d组大鼠血浆6-keto-PGF1α的表达量分别为(896.12±124.37)、(1068.13±119.41)、(1215.26±122.64)、(1317.94±106.54)ng·L^(-1),均较对照组的(830.60±109.47)ng·L^(-1)升高(P<0.001);PGI2表达量分别为(86.49±2.40)、(107.90±2.65)、(114.02±2.16)、(126.95±1.94)ng·L^(-1),均较对照组的(60.09±2.11)ng·L^(-1)升高(P<0.001);TXB2的表达量分别为(132.14±4.10)、(145.52±4.09)、(179.91±4.98)、(204.10±3.22)ng·L^(-1),均较对照组的(106.08±3.26)ng·L^(-1)升高(P<0.001)。3 d组、7 d组、14 d组大鼠血浆TXA2的表达量分别为(211.99±3.24)、(236.33±3.88)、(245.45±4.23)ng·L^(-1),均较对照组的(174.79±4.19)ng·L^(-1)升高(P<0.001)。与对照组相比,7 d组、14 d组大鼠6-keto-PGF1α/TXB2值均下降(P<0.05)。6-ketoPGF1α、PGI2、TXB2、TXA2表达量均与振动累积时间呈正相关(r=0.84、0.84、0.80、0.84,P<0.001),6-keto-PGF1α/TXB2值与振动累积时间呈负相关(r=-0.24,P=0.003)。[结论]大鼠鼠尾局部接触振动会使血液中PGI2和TXA2的表达量升高,且与振动暴露时间呈剂量-效应关系,PGI2与TXA2比值会随振动暴露的发生而呈现下降趋势。

关键词：鼠尾振动大鼠鼠尾振动模型前列环素血栓素