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Recent advances in the rational design of single-atom catalysts for electrochemical CO_(2) reduction

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Nano Research 2022年第11期15卷 9747-9763页

作者： Huoliang gu Jing Wu liming zhang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200438China

Electrochemical CO_(2) reduction(CO_(2)R)represents a sustainable way to store intermittent renewable energies and produce carbon-neutral fuels,yet the energy efficiency remains a huge bottleneck owning to its sluggish kinetics and complex reaction *** active,selective,and robust electrocatalysts are strongly demanded to accelerate CO_(2) conversion and deploy this technology to practical *** this review,we focus on single-atom catalysts(SACs),a unique category of electrocatalysts with atomically dispersed metal active sites,which have shown distinctive performances in CO_(2)R and offer an ideal platform for in-depth mechanistic studies at the atomic *** various SACs with attractive CO_(2)R performances have been reported,the relationship between electronic/geometric structure of SACs and the corresponding electrocatalytic performance still needs to be discussed with *** we take a broad overview on the recent progress in understanding the structure–function correlation of SACs in CO_(2)R,with the purpose of providing deep insights and guiding the future rational design of ***,we provide the fundamental understandings of CO_(2)R on SACs,following different reaction ***,we describe the progresses in the development of well-defined SACs and the mechanistic studies on the influences from particular structural parameters,such as first-shell and second-sphere coordination,conductive supports and interface with a secondary ***,some perspectives are highlighted on the path towards efficient CO_(2)R on SACs.

关键词： single-atom catalysts electrochemical CO_(2)reduction structure-function correlation rational design

柴达木盆地西部和北缘天然气中C_(5)—C_(7)轻烃地球化学特征

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天然气地球科学 2024年第2期35卷 344-356页

作者：张臣张道勇周世新李靖陈克非周立明谷宇峰自然资源部油气资源战略研究中心北京100034 中国科学院西北生态环境资源研究院/甘肃省油气资源研究重点实验室甘肃兰州730000 中国石油勘探开发研究院北京100083

近些年在柴达木盆地西部和北缘油气勘探获得了新进展,但新勘探区块油气来源仍存在较大争议。C_(5)—C_(7)轻烃可作为很好的补充,为判识天然气来源提供新信息。系统采集了柴西和柴北缘主要油气田的天然气样品,分析其中轻烃的组分和单体... 详细信息

近些年在柴达木盆地西部和北缘油气勘探获得了新进展,但新勘探区块油气来源仍存在较大争议。C_(5)—C_(7)轻烃可作为很好的补充,为判识天然气来源提供新信息。系统采集了柴西和柴北缘主要油气田的天然气样品,分析其中轻烃的组分和单体烃碳同位素。结果显示:柴西天然气的轻烃具有高含量的正庚烷,柴北缘天然气的轻烃具有高含量的甲基环己烷和甲苯。柴西天然气中轻烃的δ^(13)C_(MCC5)值和δ^(13)C_(MCC6)值分别分布在-23‰~-18‰和-24‰~-20‰之间,柴北缘天然气中轻烃的δ^(13)C_(MCC5)值和δ^(13)C_(MCC6)值分别分布在-28‰~-22‰和-26‰~-23‰之间。这些特征反映出柴西地区天然气中轻烃主要来源于古近系—新近系咸水湖相泥岩,柴北缘地区天然气中轻烃主要来源于侏罗系煤系烃源岩。此外,结合天然气和原油地球化学特征,对南翼山和东坪地区油气来源开展了进一步研究。南翼山地区天然气可能有来自侏罗系和古近系—新近系煤系烃源岩的贡献,原油主要来自古近系—新近系烃源岩。东坪地区天然气主要来源于侏罗系煤系烃源岩,轻烃和凝析油主要来源于侏罗系泥岩。

关键词：柴达木盆地天然气 C_(5)-C_(7)轻烃组分碳同位素

N_2O and NH_3 emissions from a bioreactor landfill operated under limited aerobic degradation conditions

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Journal of Environmental Sciences 2011年第6期23卷 1011-1019页

作者： Pinjing He Na Yang Huili gu Hua zhang liming Shao State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China

The combination of leachate recirculation and aeration to landfill may be an efficient way for in-situ nitrogen ***,nitrogenous substances contained in the landfill layer are concomitantly transformed into N2O and NH3,leading to increased emissions into the *** the present study,the emissions of N2O and NH3 were measured under conditions of fresh or partially stabilized refuse with or without leachate recirculation or intermittent *** results showed that the largest N2O emission（12.4 mg-N/L of the column） was observed in the aerated column loaded with partially stabilized refuse and recycled with the leachate of low C/N ratio;while less than 0.33 mg-N/L of the column was produced in the other columns.N2O production was positively correlated with the prolonged aerobic time and negatively related with the C/N ratio in the recycled ***3 volatilization increased with enhanced gas flow and concentration of free ammonia in the leachate,and the highest cumulative volatilization quantity was 1.7 mg-N/L of the column.

关键词： municipal solid waste bioreactor landfill aeration N2O emission NH3 volatilization

深冷循环对SiC/Al复合材料宏微观残余应力的影响

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金属学报 2024年第8期60卷 1031-1042页

作者：谷黎明冯效铭于朝张峻凡刘振宇何伦华卢怀乐李小虎王晨张晓东肖伯律马宗义中国科学院金属研究所、师昌绪先进材料创新中心沈阳110016 中国科学技术大学、材料科学与工程学院沈阳110016 散裂中子源科学中心东莞523803 中国科学院物理研究所、北京凝聚态物理国家研究中心北京100190 松山湖材料实验室东莞523808 中国科学院高能物理研究所北京100049

铝基碳化硅(SiC/Al)复合材料因其高比模量、高比强度和良好尺寸稳定性等特点广泛应用于精密光学领域。SiC/Al复合材料热处理过程中产生的宏/微观残余应力是影响其尺寸稳定性的关键因素。为了阐明残余应力的降低方法和效果,提高精密光学... 详细信息

铝基碳化硅(SiC/Al)复合材料因其高比模量、高比强度和良好尺寸稳定性等特点广泛应用于精密光学领域。SiC/Al复合材料热处理过程中产生的宏/微观残余应力是影响其尺寸稳定性的关键因素。为了阐明残余应力的降低方法和效果,提高精密光学零件的尺寸稳定性,本工作使用中子衍射和有限元模拟,分析了深冷循环处理对于体积分数为35%的SiC/6092Al复合材料在退火状态下宏微观残余应力的影响,研究了深冷循环次数、样品尺寸、增强相颗粒尺寸和深冷循环温度差等影响因素。结果表明,深冷循环能引起基体塑性应变,从而显著降低退火态SiC/Al复合材料的相应力,并且随着深冷循环次数的增加,单次循环相应力降低效果减弱。深冷循环导致的塑性应变集中在颗粒周围的基体,主要影响颗粒和周围基体的相应力大小,与样品尺寸无明显关联,并且深冷循环不增加退火态样品的宏观残余应力。复合材料多次深冷循环后的相应力降低量与SiC颗粒尺寸无关,并且,多次深冷循环对相应力的降低效果与深冷循环温度差关系较小,100~-196℃和200~-196℃进行多次深冷循环对相应力的改变十分接近。

关键词：深冷循环中子衍射残余应力有限元方法代表性体积单元

超声引导下右美托咪定复合罗哌卡因腰方肌阻滞用于小儿腹腔镜肾盂成形术临床评价

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中国药业 2024年第20期33卷 104-107页

作者：谷海飞张玉龙成黎明张明云南省昆明市儿童医院云南昆明650228

目的探讨超声引导下右美托咪定复合罗哌卡因腰方肌阻滞(QLB)用于小儿腹腔镜肾盂成形术的临床效果。方法选取医院2022年6月至2023年6月收治的行腹腔镜肾盂成形术患儿74例,按随机数字表法分为观察组和对照组,各37例。两组患儿均在超声引... 详细信息

目的探讨超声引导下右美托咪定复合罗哌卡因腰方肌阻滞(QLB)用于小儿腹腔镜肾盂成形术的临床效果。方法选取医院2022年6月至2023年6月收治的行腹腔镜肾盂成形术患儿74例,按随机数字表法分为观察组和对照组,各37例。两组患儿均在超声引导下行QLB,并予0.25%盐酸罗哌卡因注射液0.4 mL/kg静脉注射,观察组复合盐酸右美托咪定注射液1μg/kg静脉注射。结果与对照组比较,观察组患儿气腹后30 min、气腹后60 min、术毕时的心率和平均动脉压均显著降低;术后6,12,24,48 h时的FLACC疼痛评估量表评分均显著降低,Ramsay镇静量表评分均显著更优;术后首次补救镇痛时间显著延迟,48 h内补救镇痛例数显著减少(P<0.05)。两组患儿均未发生低血压和心动过缓不良反应,但观察组嗜睡、躁动和恶心呕吐的总发生率显著低于对照组(10.81%比43.24%,P<0.05)。结论超声引导下右美托咪定复合罗哌卡因QLB用于小儿腹腔镜肾盂成形术,有利于维持血流动力学稳定,优化术后镇痛镇静效果,减少镇痛药物的额外使用。

关键词：右美托咪定超声引导罗哌卡因腰方肌阻滞肾盂成形术小儿术后镇痛

Status-quo of proved oil/gas initially-in-place in China as of 2020 and its variation trend in the past decade

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Energy Geoscience 2022年第4期3卷 343-348页

作者： liming Zhou Daoyong zhang Jinchao Sun Yufeng gu Chenshuo zhang Chen zhang Strategic Research Center of Oil/gas Resources Ministry of Natural ResourcesBeijing100034China CHN Energy Lucency Enviro-Tech CO. LTDBeijing100039China

This study analyzes the status-quo of the proved oil/gas initially-in-place and its variation trend,the proved undeveloped oil/gas initially-in-place,and the remaining proved technically recoverable reserves(TRR)of oil/gas in China as of 2020 based on *** shown by the results,the proved oil initially-in-place(OIIP),the proved undeveloped OIIP,and the remaining proved TRR of oil in China are mainly distributed in the Bohai Bay,Ordos and Songliao Basins,and those of free gas are mainly in the Ordos,Sichuan,and Tarim *** 2011 to 2020,the largest increment in the proved OIIP,the proved undeveloped OIIP and the remaining proved TRR of oil occurred in the Ordos Basin,followed by the Bohai Bay Basin,while that in the proved gas initially-in-place(GIIP),the proved undeveloped GIIP,and the remaining proved TRR of gas occurred in the Ordos Basin,followed by the Sichuan *** addition,a comprehensive analysis reveals that the petroliferous basins in China with the potential of reserve addition and production growth include the Ordos Basin,the Bohai Bay Basin,the Sichuan Basin,and the Tarim Basin.

关键词： Proved oil/gas initially-in-place(OIIP/GIIP) Proved undeveloped oil/gas initially-in-place(OIIP/GIIP) Remaining proved technically recoverable reserves(TRR) Petroleum distribution in Chinese basins Variation trend

Morphology and size controlled synthesis of Co-doped MIL-96 by different alkaline modulators for sensitively detecting alpha-fetoprotein

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Chinese Chemical Letters 2020年第9期31卷 2263-2267页

作者： Chaonan gu Jingjing Li guang Yang liming zhang Chun-Sen Liu Huan Pang Henan Provincial Key Laboratory of Surface&Interface Science Zhengzhou University of Light IndustryZhengzhou 450002China School of Chemistry and Chemical Engineering Guangling CollegeYangzhou UniversityYangzhou 225009China School of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China

This work introduces a simple and facile approach for the morphology and size controlled synthesis of Co-doped *** using different bases as modulators,Co-doped MIL-96 was obtained with sizes that varied from 5 μm to 300 nm,and four different morphologies,including hexagonal prism,icosahedron,hexagonal spindle and *** these,nano-sized Co-doped MIL-96 with an ellipsoid morphology exhibited the highest electroactive surface area and good conductivity as well as the best electrochemical sensing performance towards α-fetoprotein.

关键词： Morphology/size MIL-96 Modulator Aptasensor Alpha-fetoprotein

Organic Nanocrystals Based on a Solid-emission-tunable AIEgen for Cell Imaging

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Chemical Research in Chinese Universities 2021年第1期37卷 129-136页

作者： YANG liming guO Lixin YU Hao WANG guan SUN Jiangman zhang Pengfei gu Xinggui TANG Ben Zhong Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Materials Science and EngineeringState Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China guangdong Key Laboratory of Nanomedicine Shenzhen Engineering Laboratory of Nanomedicine and NanoformulationsCAS Key Laboratory of Health InformaticsInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055P.R.China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyThe Hong Kong University of Science and TechnologyHong KongP.R.China

The development of fluorescent nanocrystals based on organic small molecules is of great importance in bioimaging due to the merits of easy modification,high brightness and excellent photostability,however suffering from the emission-detrimental aggregation-caused quenching(ACQ)***,we successfully designed and synthesized an AIE-active di(N,N-dimethylaniline)-dibenzofulvene(named as NFTPE),which exhibits the crystallization-induced emission enhancement(CIEE)***,two types of yellow-and orange-emissive crystals for NFTPE were obtained,exhibiting aggregation microenvironment-dependent emission tuning in the solid ***-crystal analysis and density functional theory(DFT)calculations reveal that different aggregation microenvironments result in the distinct molecular conformation for various ***,the crystallization of NFTPE in an aqueous solution under the assistance of amphiphilic PEG polymer matrices could be monitored in situ by the fluorescence changes,facilitating the preparation of NFTPE nanocrystals(NFTPE-NCs)by adjusting the aggregation *** obtained NFTPE-NCs exhibit the superior performance in cell imaging in respect to high brightness,photostability,and biocompatibility,thus demonstrating the potential in bioimaging applications.

关键词： Aggregation-induced emission(AIE) Crystallization-induced emission enhancement(CIEE) Aggregation microenvironment Nanocrystal Cell imaging

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热毒宁注射液雾化吸入给药的安全性研究

中草药 2024年第9期55卷 3015-3026页

作者：张腾之宋玲唐黎明侯红平谷舒怡高云航航艾李晗彭博陈韡亚陈腾飞张广平中国中医科学院中药研究所北京100700 上海市食品药品检验研究院药理毒理所上海201112

目的针对热毒宁注射液雾化吸入给药后可能的安全性风险开展研究,为热毒宁注射液雾化吸入临床应用提供基础和依据,探讨中药雾化吸入制剂临床前安全性评价的技术方法。方法在GLP条件下开展热毒宁注射液大鼠雾化吸入单次给药和重复给药30 ... 详细信息

目的针对热毒宁注射液雾化吸入给药后可能的安全性风险开展研究,为热毒宁注射液雾化吸入临床应用提供基础和依据,探讨中药雾化吸入制剂临床前安全性评价的技术方法。方法在GLP条件下开展热毒宁注射液大鼠雾化吸入单次给药和重复给药30 d毒性实验,大鼠黏膜刺激(伴随反复给药观察)和豚鼠全身主动过敏实验。在连续给药7 d后,分别在停药1、7、14 d时对热毒宁注射液在肺中检测到的31种成分进行分析。结果大鼠单次口鼻暴露120 min/次、2次/d,动物未见明显异常;热毒宁低、中、高剂量(30、60、120 min/d)组大鼠口鼻吸入重复给药30 d、恢复期14 d毒性实验对血液学、血液生化、肺系数、尿液、组织病理学未见药物相关的病理改变,对呼吸道黏膜未见刺激性。豚鼠全身主动过敏实验为阴性。所分析到的热毒宁注射液的31种成分在停药14 d后所有成分均检测不到或者在检测限下。结论热毒宁注射液雾化吸入给药对呼吸道黏膜无刺激和过敏,大鼠口鼻暴露1个月未见明显毒性反应,所测定的31种成分均能够在肺部代谢,无明显沉积。

关键词：热毒宁注射液雾化吸入安全性肺沉积栀子苷新绿原酸绿原酸隐绿原酸