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Probing of coupling effect induced plasmonic charge accumulation for water oxidation

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National Science Review 2021年第6期8卷 160-168页

作者： Yuying Gao Feng Cheng Weina Fang xiaoguo liu Shengyang Wang Wei Nie Ruotian Chen Sheng Ye Jian Zhu Hongyu An Chunhai Fan Fengtao Fan Can Li State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyCollaborative Innovation Center of Chemistry for Energy Materials (i Ch EM)Dalian Institute of Chemical PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences School of Chemistry and Chemical Engineering and Institute of Molecular MedicineRenji HospitalSchool of MedicineShanghai Jiao Tong University

A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges(electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst’s surface, and how to improve local charge density at active sites, remains unknown because it is difficult to identify the exact spatial location and local density of the plasmon-induced charge, particularly with regard to holes. Herein, we show that at the single particle level, plasmon-coupling-induced holes can be greatly accumulated at the plasmonic Au nanoparticle dimer/Ti O2 interface in the nanogap region, as directly evidenced by the locally enhanced surface photovoltage. Such an accumulation of plasmonic holes can significantly accelerate the water oxidation reaction(multi-holes involved) at the interfacial reaction site, with nearly one order of magnitude enhancement in photocatalytic activities compared to those of highly dispersed Au nanoparticles on Ti O2. Combining Kelvin probe force microscopy and theoretical simulation, we further clarified that the local accumulated hole density is proportional to the square of the local near-field enhancement. Our findings advance the understanding of how charges spatially distribute in plasmonic systems and the specific role that local charge density at reaction sites plays in plasmonic photocatalysis.

关键词： plasmonic photocatalysis coupling effect charge separation surface photovoltage spatial distribution

Simultaneous determination of some trace metal impurities in high-purity sodium tungstate using coprecipitation and inductively coupled plasma atomic emission spectrometry

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Rare Metals 2004年第3期23卷 193-196页

作者： MAxiaoguo KUANGTongchun liuQianjun CenterofAnalysisandTesting GuangdongUniversityofTechnologyGuangzhou510090China

A method based on the combination of coprecipitation with inductively coupledplasma atomic emission spectrometry (ICP-AES) was developed for the determination of impurities inhigh-purity sodium tungstate. Six elements (Co, Cu, Fe, Mn, Ni, and Pb) were coprecipitated bylanthanum hydroxide so as to be concentrated and separated from the tungsten matrix. Effects of somefactors on the recoveries of the analytes and on the residual amount of sodium tungstate wereinvestigated, and the optimum conditions for the coprecipitation were proposed. Matrix-matchingcalibration curve method was used for the analysis. It is shown that the elements mentioned abovecan be quantitatively recovered. The detection limits for Co, Cu, Fe, Mn, Ni, and Pb are 0.07, 0.4,0.2, 0.1, 0.6, and 1.3 μg·g^(-1), respectively. The recoveries vary from 92.5% to 108%, and therelative standard deviations (RSDs) are in the range of 3.1%-5.5%.

关键词： analytical chemistry trace metal determination inductively coupled plasmaatomic emission spectrometry (ICP-AES) coprecipitation sodium tungstate

RELATION BETWEEN RAPID UPLIFTING AND GRAVITATIONAL EQUILIBRIUM ,TECTONICS AND THERMODYNAMIC EFFECT IN QINGHAI—TIBET PLATEAU

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地学前缘 2000年第S1期7卷 336-338页

作者： Chi xiaoguo,Li Cai, liu Shen, Yang Rihong (Changchun University of Science and Technology,Changchun 130026,China)

The distribution of the Mountain ranges, Plateau as well as the distribution of continents and oceans on the earth’s surface are the embodies of the structure and heat states of the materials at the deep crust and of the tectonic stress of regions. There should be a prevalent corresponding between terrestrial height and the texture, thermal and stress states of lithosphere. However, there is no a general consensus on what extent different factors affecting the height of a terrain should be up to now, and this is very apparent for the models of plateau uplifting.1\ Debates on the compensatory depth of crustal equilibrium\;Based on a previous equilibrium model, Woollard(1969) set up an equation to show the relation among the crustal thickness ( D \-m), the depth of Mohorovicic discontinuity(M)and height above sea level( H):D \-m=33.2+8.5 H (km). By this equation it is implied that equilibrium compensation has been reached at the depth of Mohorovicic discontinuity for the height of a terrain. As Woollard (1970)described, there is no evidence to show that mass distribution beneath the Mohorovicic discontinuity ever played an important roles in the equilibrium compensation of the crust.

关键词： gravitional compensation tectonism thermal action uplifting of plateau

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非异氰酸酯聚氨酯涂料的制备及性能研究

涂料工业 2011年第3期41卷 35-37页

作者：黄禹刘晓国广州大学化学化工学院广州510006

将2,3-环碳酸甘油酯甲基丙烯酸酯(PCMA)与丙烯酸酯类单体共聚生成的聚合物作为主要成膜物,以二乙烯三胺为固化剂,制备了非异氰酸酯聚氨酯涂膜(NIPU)。通过FT-IR对涂膜结构进行分析,证明了聚氨酯特殊基团氨基甲酸酯的合成;并通过对漆膜... 详细信息

将2,3-环碳酸甘油酯甲基丙烯酸酯(PCMA)与丙烯酸酯类单体共聚生成的聚合物作为主要成膜物,以二乙烯三胺为固化剂,制备了非异氰酸酯聚氨酯涂膜(NIPU)。通过FT-IR对涂膜结构进行分析,证明了聚氨酯特殊基团氨基甲酸酯的合成;并通过对漆膜综合性能的研究,确定了共聚实验配方及固化合成NIPU的最佳工艺。配制的清漆漆膜综合性能优良,同时其制备过程中不以有毒、高湿敏性的异氰酸酯为原料,安全、环保。

关键词：非异氰酸酯聚氨酯聚氨酯涂料环碳酸酯

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石墨烯基疏水单体的制备及其防水乳液的应用

化工进展 2020年第S01期39卷 186-194页

作者：曹思娟刘晓国宋松林刘华溪广州大学化学化工学院广东广州511400 清远市柯林达新材料有限公司广东清远513000

采用新癸酸缩水甘油酯(E10P)、甲基丙烯酸羟乙酯(HEMA)、异佛尔酮二异氰酸酯(IPDI)对氧化石墨烯(GO)进行接枝疏水烷基链,得到可水分散性的含碳碳双键的石墨烯基疏水单体(IHGOE)。在壳中引入IHGOE和丙烯酸酯类单体通过自由基聚合得到石... 详细信息

采用新癸酸缩水甘油酯(E10P)、甲基丙烯酸羟乙酯(HEMA)、异佛尔酮二异氰酸酯(IPDI)对氧化石墨烯(GO)进行接枝疏水烷基链,得到可水分散性的含碳碳双键的石墨烯基疏水单体(IHGOE)。在壳中引入IHGOE和丙烯酸酯类单体通过自由基聚合得到石墨烯改性的丙烯酸酯有机无机杂化核壳乳液。并通过FTIR、XPS、TG、SEM、粒径等测试对乳液进行了结构分析,并测试了乳液配方中IHGOE含量对涂膜的接触角、附着力、硬度、耐水煮、耐水性、耐酸碱性等性能的影响。结果表明,当乳液配方中IHGOE质量分数为20%时,涂膜的接触角达到最大,即为110.8°,比纯丙烯酸酯乳液涂膜接触角74.3°高出49.1%,显著提高了涂膜的防水性能。同时,涂膜附着力为0级,硬度为2H,耐水煮≥1h,耐水浸泡大于48h,耐丁酮擦拭(1kg)大于100次,耐5%NaOH水溶液浸泡大于24h,耐5%HCl水溶液浸泡大于24h。

关键词：氧化石墨烯乳液防水性聚合物合成

右美托咪定联合地佐辛用于腰椎内固定术后镇痛效果观察及对患者痛觉过敏的影响

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中国基层医药 2022年第9期29卷 1297-1301页

作者：董玉芳刘孝国浙江中医药大学研究生院杭州310053 武警海警总队医院麻醉科嘉兴314000

目的探讨右美托咪定联合地佐辛用于腰椎内固定术后患者的镇痛效果及对患者痛觉过敏的影响。方法选取武警海警总队医院2018年4月至2019年6月择期行腰椎内固定术治疗的患者72例,采用随机数字表法分为对照组、观察组各36例,对照组采用氟比... 详细信息

目的探讨右美托咪定联合地佐辛用于腰椎内固定术后患者的镇痛效果及对患者痛觉过敏的影响。方法选取武警海警总队医院2018年4月至2019年6月择期行腰椎内固定术治疗的患者72例,采用随机数字表法分为对照组、观察组各36例,对照组采用氟比洛芬酯联合地佐辛术后镇痛,观察组采用右美托咪定联合地佐辛术后镇痛。观察两组机械痛觉阈值、术后疼痛程度、并发症发生情况。结果观察组术后6 h、24 h、48 h伤口周围痛觉阈值分别为(119.52±20.42)分、(120.19±17.44)分、(120.94±20.73)分,均高于对照组的(108.42±15.24)分、(107.63±16.83)分、(108.47±17.82)分(t=0.01、0.00、0.01,均P0.05);两组术后48 h内地佐辛使用剂量差异无统计学意义(P>0.05);观察组术后并发症发生率为8.33%(3/36),低于对照组的27.78%(10/36)(χ^(2)=4.60,P<0.05)。结论腰椎内固定术后采用右美托咪定联合地佐辛镇痛效果明显,且可有效预防痛觉过敏,并发症发生率低。

关键词：麻醉和镇痛麻醉药联用疼痛测定痛觉过敏腰椎内固定术手术后并发症右美托咪定地佐辛

水性氟硅改性丙烯酸树脂的合成及涂膜性能研究

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涂料工业 2013年第7期43卷 5-9页

作者：黄守成刘晓国广州大学化学化工学院广州510006

合成具有足够疏水和疏油性能的水性含氟丙烯酸树脂,全部采用含氟丙烯酸酯单体,其在提供树脂具有疏水和疏油性能的同时,也会带来树脂容易起泡和稳泡的缺陷,为此,采用开环聚合合成环硅氧烷预聚物,将环硅氧烷预聚物引入水性含氟丙烯酸树脂... 详细信息

合成具有足够疏水和疏油性能的水性含氟丙烯酸树脂,全部采用含氟丙烯酸酯单体,其在提供树脂具有疏水和疏油性能的同时,也会带来树脂容易起泡和稳泡的缺陷,为此,采用开环聚合合成环硅氧烷预聚物,将环硅氧烷预聚物引入水性含氟丙烯酸树脂分子链中,可以消除因含氟单体引入产生的起泡和稳泡缺陷。

关键词：氟硅改性泡沫性能水性涂料

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不同麻醉药物对食管癌根治术患者疗效影响

中国现代医生 2017年第34期55卷 107-110页

作者：刘孝国武警浙江省总队嘉兴医院麻醉科浙江嘉兴314000

目的探讨不同药物联合瑞芬太尼麻醉对食管癌根治术患者炎症反应治疗效果及对肺功能的影响。方法取食管癌患者100例,随机分为对照组(n=50)和观察组(n=50)。两组均静脉输注瑞芬太尼麻醉维持镇痛,对照组采用七氟烷吸入麻醉,观察组采用丙泊... 详细信息

目的探讨不同药物联合瑞芬太尼麻醉对食管癌根治术患者炎症反应治疗效果及对肺功能的影响。方法取食管癌患者100例,随机分为对照组(n=50)和观察组(n=50)。两组均静脉输注瑞芬太尼麻醉维持镇痛,对照组采用七氟烷吸入麻醉,观察组采用丙泊酚静脉麻醉,采用酶联免疫吸附试验测定两组麻醉前、后核转录因子(NF-κBDNA)和白细胞介素-1(IL-1)水平,采用血气分析仪测定两组麻醉不同时间点血气指标。结果观察组与对照组麻醉后不同时间点NF-κBDNA、IL-1水平,均高于T0时间点(P0.05)。结论丙泊酚联合瑞芬太尼麻醉更有利于减轻食管癌患者术中不良炎症反应。

关键词：瑞芬太尼七氟烷丙泊酚食管癌根治术炎症反应肺功能

LANGUAGE LEARNING STRATEGIES AND LANGUAGE ACHIEVEMENT: ACROSS-CULTURAL STUDY

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Chinese Journal of Applied Linguistics 2005年第3期28卷 82-89,75+127-128页

作者：张效国刘永兵江南大学外语学院

This study explored the relationship between LLS and LA in two different cultural contexts. The findings revealed that the differences between Australian and Chinese university students tend to lie more in their language proficiency levels than in cultural factors. This study also compares learners' strategy use and its relationship to LA in two different educational systems. It is evident that the difference in teaching methods, learning tasks and achievement assessments would have an impact upon learners' strategy use and its relationship to LA.

关键词： learning strategies language achievement cross- cultural study