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镍钴水滑石纳米笼/GO复合材料在锂离子电池负极中的应用

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高师理科学刊 2024年第1期44卷 43-50,77页

作者：高昂周胜冯立峰张强哈尔滨师范大学物理与电子工程学院黑龙江哈尔滨150025

近年来,水滑石(LDh)材料因其组成、结构和形貌易于调节,具有丰富的活性位点,被认为是高性能锂离子电池(LIBs)负极的替代材料,然而水滑石作为负极仍存在电导率差和结构易聚集等问题.于此同时,金属有机框架(MOFs)及碳基材料也由于其优秀... 详细信息

近年来,水滑石(LDh)材料因其组成、结构和形貌易于调节,具有丰富的活性位点,被认为是高性能锂离子电池(LIBs)负极的替代材料,然而水滑石作为负极仍存在电导率差和结构易聚集等问题.于此同时,金属有机框架(MOFs)及碳基材料也由于其优秀的孔隙率、比表面积以及良好的电导率在储能领域得到了广泛的关注.考虑到这二者有望对LDh的主要缺陷有所改进,提出了将原位沉淀、化学刻蚀法和静电吸附法相结合,使镍钴水滑石纳米笼(h-(Ni,Co)-LDhP)能够固定在GO上,从而得到镍钴水滑石纳米笼/氧化石墨烯复合材料(h-(Ni,Co)-LDhP/GO).这种GO上密集分布的中空纳米结构更能有效抑制水滑石纳米片的聚集,并有利于锂离子的脱嵌.h-(Ni,Co)-LDhP/GO纳米复合材料作为锂离子电池的负极,在电流密度为50m A·g^(-1)下,循环第一圈库伦效率可达68%,循环50圈后电容保留率为68.4%.

关键词：锂离子电池水滑石负极材料

hZSM-5 的低温水热改性及其己烯芳构化性能

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石化技术与应用 2024年第3期42卷 165-170页

作者：魏永峰李剑程子昂杨丽娜辽宁石油化工大学石油化工学院辽宁抚顺113001 中海油田服务股份有限公司天津300450

对hZSM-5在70,100和150℃下进行低温水热改性,分别制得催化剂T 70-hZ-5,T 100-hZ-5和T 150-hZ-5,利用X射线衍射仪、X射线荧光光谱仪、物理吸附仪、化学吸附分析仪和红外光谱仪等对上述催化剂进行表征,并对其己烯芳构化催化性能进行了评... 详细信息

对hZSM-5在70,100和150℃下进行低温水热改性,分别制得催化剂T 70-hZ-5,T 100-hZ-5和T 150-hZ-5,利用X射线衍射仪、X射线荧光光谱仪、物理吸附仪、化学吸附分析仪和红外光谱仪等对上述催化剂进行表征,并对其己烯芳构化催化性能进行了评价。结果表明:低温水热改性保持了hZSM-5的完整晶相结构,提高了其硅铝比[n(Si)/n(Al)],B酸和L酸酸量比(B/L)及平均孔径;酸量的降低和孔径的增大有利于hZSM-5寿命的延长,B/L值的增大有利于选择性的提高;在反应温度405℃,反应压力0.2 MPa,质量空速2 h-1的条件下,T 100-hZ-5的催化寿命可达44 h,比改性前延长了36 h;当反应8 h时,hZSM-5的苯、甲苯和二甲苯混合物(BTX)选择性已迅速降到35%左右,而T 100-hZ-5的仍接近55%。

关键词： hZSM-5 低温水热改性孔结构烯烃己烯芳构化催化剂寿命选择性

东秦岭夜长坪钼矿床流体包裹体特征及对成矿作用的指示

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现代地质 2024年第4期38卷 1177-1191页

作者：丁高明晏国龙王坤明唐一昂刘骥阳中国黄金集团地质有限公司中国煤炭地质总局中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室

夜长坪钼矿床位于河南省卢氏县境内，产于东秦岭钼成矿带中段，是以矽卡岩型为主的超大型矽卡岩型－斑岩型钼矿床，矿体受浅成-超浅成花岗斑岩控制，呈厚大的叠层穹隆状就位于花岗斑岩体与龙家园组(Pt2l)白云岩围岩地层内外接触带中。... 详细信息

夜长坪钼矿床位于河南省卢氏县境内，产于东秦岭钼成矿带中段，是以矽卡岩型为主的超大型矽卡岩型－斑岩型钼矿床，矿体受浅成-超浅成花岗斑岩控制，呈厚大的叠层穹隆状就位于花岗斑岩体与龙家园组(Pt2l)白云岩围岩地层内外接触带中。矿石中金属矿物以辉钼矿、白钨矿、黄铁矿、磁铁矿为主，热液蚀变主要为硅化、钾长石化、碳酸盐化等。本文结合野外地质编录和镜下岩矿鉴定成果，将夜长坪钼矿床成矿阶段从早到晚划分为早期矽卡岩阶段、晚期矽卡岩石英－钾化阶段(Ⅰ阶段石英)、石英－辉钼矿阶段(Ⅱ阶段石英，主成矿阶段)、石英－多金属硫化物阶段(Ⅲ阶段石英)、石英－碳酸盐阶段(Ⅳ阶段石英)。在此基础上，分别针对上述Ⅰ ～ Ⅳ石英采集包裹体样品，进行岩相学特征、显微镜下观察及显微测温和激光拉曼光谱特征分析。分析研究表明，夜长坪钼矿床石英中流体包裹体类型为WG型(NaCl-h2O富气型)、WL型(NaCl-h2O富液型)、C型(CO2型)和S型(含子晶型)。从成矿作用早阶段到晚阶段，包裹体完全均一温度集中在380 ～ 437 ℃、331 ～ 370 ℃、312 ～ 320 ℃、257 ～ 350 ℃，平均盐度NaCl eqv.分别为10.83%、9.29%、7.16%、4.51%，成矿流体从高中温、中高盐度、富(含)CO2的NaCl-h2O-CO2体系向晚期中低温、低盐度、贫CO2的NaCl-h2O体系演化。流体混合作用使得流体的温度下降、盐度降低，流体由氧化状态转化为还原状态，使得流体中的Mo元素溶解度大幅降低，随后Mo元素迅速卸载并沉淀富集成矿。根据“岩浆－流体－建造”成矿作用特征，构建了矿区(床)尺度成矿模式，进一步丰富了东秦岭钼成矿带矽卡岩－斑岩型矿床及夜长坪钼矿床流体包裹体研究成果，也为夜长坪钼矿床深部及外围探矿增储提供支撑。

关键词：东秦岭钼矿带夜长坪钼矿床矽卡岩-斑岩型钼矿床流体包裹体

Refining constitutive relation by integration of finite element simulations and Gleeble experiments

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Journal of Materials Science & Technology 2019年第6期35卷 1039-1043页

作者： D.J. Yu D.S. Xu h. W ang Z.B. Zhao G.Z. wei R. Yang College of Sciences Northeastern University Shenyang 110004 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Thermo-mechanical coupled finite element calculations were carried out to simulate the Gleeble compression of the samples of a titanium alloy(Ti60), and the results are analyzed and compared with the actual compression tests conducted on a Gleeble 3800 thermo-mechanical simulator. The changes in temperature, stress and strain distribution in the samples and the source of error on the constitutive relations from Gleeble hot compression test were analyzed in detail. Both simulations and experiments showed that the temperature distribution in the specimen is not uniform during hot compression, resulting in significant deformation inhomogeneity and non-ignorable error in the flow stress strain relation,invalidating the uniform strain assumption commonly assumed when extracting the constitutive relation from Gleeble tests. Based on the finite element simulations with iterative corrections, we propose a scheme to refine the constitutive relations from Gleeble tests.

关键词： Titanium alloy Constitutive relation Finite element Compression Temperature distribution

褪黑素抑制NLRP3炎症小体激活缓解钴铬钼颗粒引起的骨溶解

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中国组织工程研究 2024年第10期28卷 1484-1489页

作者：张晨辉付婷婷吴阳林张钦刘昂杨惠林林俊苏州大学附属第一医院骨科江苏省苏州市215006 苏州独墅湖医院骨科苏州大学附属独墅湖医院苏州大学医学中心江苏省苏州市215001

背景:假体周围骨溶解是人工关节置换术最常见的远期并发症,研究表明炎症小体可能在其发病过程中发挥重要作用。褪黑素是松果体分泌的节律调节激素,具有抗炎、抗氧化和抗肿瘤等多种功效,但其对骨溶解和炎症小体的影响还有待探索。目的:... 详细信息

背景:假体周围骨溶解是人工关节置换术最常见的远期并发症,研究表明炎症小体可能在其发病过程中发挥重要作用。褪黑素是松果体分泌的节律调节激素,具有抗炎、抗氧化和抗肿瘤等多种功效,但其对骨溶解和炎症小体的影响还有待探索。目的:探究褪黑素对磨损颗粒诱导的骨溶解与NLRP3炎症小体激活的作用。方法:①体内实验:取15只C57BL/6小鼠,采用随机数字表法随机分为假手术组、骨溶解组、褪黑素组,每组5只。骨溶解组、褪黑素组通过向颅骨矢状缝内注射钴铬钼颗粒建立骨溶解模型,注射后,褪黑素组腹腔注射50 mg/(kg·d)的褪黑素,连续注射14 d。药物干预结束后取小鼠颅骨,进行Micro-CT分析,观察颅骨矢状缝周围微观结构变化。②体外实验:取小鼠骨髓源性巨噬细胞与ThP-1细胞(已诱导分化为巨噬细胞),均分为7组干预,分别为正常组、脂多糖组、脂多糖+钴铬钼组及褪黑素0.5,1,1.5,2 mmol/L组(褪黑素干预各组均加入脂多糖与钴铬钼)。药物干预6 h后,采用Western blot法检测细胞裂解液或细胞培养上清中炎症小体相关蛋白(NLRP3、Caspase-1、白细胞介素1β和焦孔素D、焦孔素D-N末端)的表达,通过乳酸脱氢酶释放与活死荧光染色观察细胞毒性和死亡情况。结果与结论:①体内实验:micro-CT扫描3D重建图像显示,骨溶解组小鼠颅骨矢状缝周围骨量明显减少,骨组织结构被严重破坏;与骨溶解组相比,褪黑素组小鼠颅骨矢状缝周围骨量明显增加,组织结构破坏减少。②体外实验:对于小鼠骨髓源性巨噬细胞,脂多糖显著上调了细胞裂解液中NLRP3蛋白的表达,而褪黑素干预可呈剂量依赖性降低NLRP3蛋白的表达;钴铬钼颗粒显著上调了细胞裂解液中焦孔素D-N末端及细胞培养上清中Caspase-1、白细胞介素1β的蛋白表达,而褪黑素干预可呈剂量依赖性降低这些蛋白的表达。对于ThP-1细胞,钴铬钼颗粒显著上调了细胞培养上清中Caspase-1、白细胞介素1β的蛋白表达,而褪黑素干预可呈剂量依赖性降低这些蛋白的表达。乳酸脱氢酶释放与活死荧光染色显示,钴铬钼颗粒显著增加了小鼠骨髓源性巨噬细胞培养上清中乳酸脱氢酶的释放及细胞的死亡,而褪黑素干预可减少乳酸脱氢酶的释放及细胞的死亡。③结果表明:褪黑素可以抑制磨损颗粒诱导的炎症小体激活和焦亡,抑制假体周围骨溶解。

关键词：钴铬钼颗粒骨溶解巨噬细胞炎症小体细胞焦亡褪黑素

Effects of osmotic stress on the expression profiling of aquaporin genes in the roughskin sculpin(Trachidermus fasciatus)

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Acta Oceanologica Sinica 2020年第6期39卷 19-25页

作者： Qian Ma Xinfu Liu ang Li Shufang Liu Zhimeng Zh.ang College of Fisheries Guangdong Ocean UniversityZhanjiang 524088China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China

Aquaporins(AQPs)are a family of integral membrane proteins that have been shown to be important for osmoregulation in many *** identify potential stress resistance-related aqp genes in salinity adaptation of the roughskin sculpin Trachidermus fasciatus,we investigated the time-course expression dynamics of seven aquaporin genes(aqp1,4,7,8,10,11 and 12)in three osmoregulatory tissues(kidney,gill and intestine)and one metabolic tissue(liver).The fish were subjected to two different acute osmotic treatments(seawater-tofreshwater transfer respectively achieved in 1 h and 24 h,namely,E-acute and acute group).The expression profiling of the seven aqp genes were performed using quantitative real-time PCR(qRT-PCR).At the time of all sampling time points(0 h,12 h,24 h and 48 h),no expression of aqp4 was found in the gill,liver and intestine;no expression of aqp7 was found in the gill and *** differences of aqp expression were determined in the four target tissues,and the mRNA levels were largely variable among gene members and *** patterns of the time-course expression were detected in most of the aqp genes in *** between the two acute groups,except that only one gene(aqp12)in the kidney and three genes(aqp7,aqp8 and aqp10)in the intestine revealed different expression *** results suggest that the expression response of aqp genes was similar under osmotic changes with different rates.

关键词： Trachidermus fasciatus aquaporin salinity changes stress response gene expression

Self-assembled nanochaperones enable the disaggregation of amyloid insulin fibrils

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Science china chemistry 2022年第2期65卷 353-362页

作者： hui Wang ang Li Menglin Yang Yu Zhao Linqi Shi Rujiang Ma Key Laboratory of Functional Polymer Materials of Ministry of Education Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Medicinal chemical Biology Nankai UniversityTianjin 300071China

The deposition of highly ordered amyloid fibrils is recognized as a hallmark of amyloidosis diseases such as Alzheimer’s disease and Parkinson’s *** the amyloid fibrils is considered as one of the effective strategies for the control and treatment of amyloidosis *** this article,by simulating the function of natural molecular chaperones,co-assembled block copolymer micelles with coordination groups of nitrilotriacetic acid(NTA)and hydrophobic microdomains of poly(Nisopropylacrylamide)(PNIPAM)on the surface were used as nanochaperones(n chaps)to disaggregate amyloid insulin *** ions chelated by NTA can bind the histidine imidazole residues while the PNIPAM microdomains can interact with the exposed hydrophobic sites on the amyloid insulin fibrils,which synergistically perturb the stability of amyloid insulin fibrils,loosen their structure,and finally promote their disaggregation.A combination of characterizations with fluorescence spectroscopy,transmission electron microscopy(TEM),dynamic hight scattering(DLS),and quartz crystal microbalance(QCM)demonstrated that mature amyloid insulin fibrils were completely disaggregated after incubating with n chaps for 90 *** study may provide a promising strategy for the development of n chaps for the treatment of amyloidosis diseases.

关键词： amyloid fibrils insulin nanochaperones disaggregation

Oxidation Modification of Polyacrylonitrile-Based Carbon Fiber and Its Electro-chemical Performance as Marine Electrode for Electric Field Test

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Journal of Ocean University of china 2020年第2期19卷 361-368页

作者： ZAI Xuerong LIU ang TIAN Yuhua chAI Fanggang FU Yubin College of chemistry and chemical Engineering Ocean University of ChinaQingdao 266100China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

A novel sensor for ocean electric field testing has been fabricated by polyacrylonitrile-based on carbon fibers with electro-chemical *** surface profile characteristics of the carbon fibers were characterized by scanning electron microscope,Fourier transform infrared spectra and contact *** voltammetry and Tafel curves have been used to study its electro-chemical *** identical electrodes in sea water as the electric field sensor will swiftly respond to applied electric field which causes positive and negative ions to move in opposite direction,resulting in a electric potential difference(ΔE).Test result indicates that the offset potential is typically below 1 m V with a drift of 60-170μVd^-*** self noise level is 1.07 nV√hz^(1/2)@1 *** electric field response indicates that the modified electrode pair shows better response to AC sine signal of amplitude and frequency(5 mV and 1 mhz)respectively than its *** electric field response model of the modified electrodes is creatively presented according to its electric double layer capacitance and Faraday *** advantages of the carbon fiber electric field electrode will make it have potential application prospect.

关键词： carbon fiber electrode electro-chemical oxidation modification electro-chemical performance electric field response electric field test

Observation of atmospheric nitrous acid with DOAS in Beijing, china

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Journal of Environmental Sciences 2006年第1期18卷 69-75页

作者： QIN Min XIE Pin-hua LIU Wen-qing LI ang DOU Ke Fang Wu LIU Jian-guo Zhang wei-jun Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei230031 China

Measurements of nitrous acid （hONO） and nitrogen dioxide （NO2） in Beijing City have been performed by means of a developed differential optical absorption spectroscopy （DOAS） system based on photodiode array （PDA）, during the autumn of 2004. hONO and NO2 were simultaneously identified by their characteristic absorption bands in the spectral region between 337 nm and 372 nm with high sensibility and time resolution. The concentrations of hONO exhibit obviously diurnal variation with a nocturnal maximum and a daytime minimum. The highest hONO value up to 11.8 μg/m^3 was observed during the night of 2/3 September. Possible sources of the observed hONO were discussed. Good correlation to NO2 indicates that NO2 is a main source component. The measurement also shows direct emission of hONO is an imnortant source in strongly polluted urban area.

关键词： atmospheric measurements hONO NO2 DOAS source