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Enhanced photoelectrochemical water splitting with a donor-acceptor polyimide

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Frontiers in Energy 2024年第4期18卷 463-473页

作者： Hongyu QU xiaoyu xu Longfei HONG Xintie WANG Yifei ZAN Huiyan ZHANG Xiao ZHANG Sheng CHU Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

Polyimide(PI)has emerged as a promising organic photocatalyst owing to its distinct advantages of high visible-light response,facile synthesis,molecularly tunable donor-acceptor structure,and excellent physicochemical ***,the synthesis of high-quality PI photoelectrode remains a challenge,and photoelectrochemical(PEC)water splitting for PI has been less ***,the synthesis of uniform PI photoelectrode films via a simple spin-coating method was reported,and their PEC properties were investigated using melamine as donor and various anhydrides as *** influence of the conjugate size of aromatic unit(phenyl,biphenyl,naphthalene,perylene)of electron acceptor on PEC performance were studied,where naphthalene-based PI photoelectrode exhibited the highest photocurrent *** is resulted from the unification of widerange light absorption,efficient charge separation and transport,and strong photooxidation *** paper expands the material library of polymer films for PEC applications and contributes to the rational design of efficient polymer photoelectrodes.

关键词： polyimide(PI)film photoelectrochemistry band structure engineering aromatic unit

Ultra‑Stable Sodium‑Ion Battery Enabled by All‑Solid‑State Ferroelectric‑Engineered Composite Electrolytes

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Nano-Micro Letters 2024年第11期16卷 704-717页

作者： Yumei Wang Zhongting Wang xiaoyu xu Sam Jin An Oh Jianguo Sun Feng Zheng Xiao Lu Chaohe xu Binggong Yan Guangsheng Huang Li Lu College of Aerospace Engineering Chongqing UniversityChongqing 400044People’s Republic of China National University of Singapore(Chongqing)Research Institute Chongqing 401123People’s Republic of China College of Materials Science and Engineering Chongqing UniversityChongqing 400044People’s Republic of China Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore 117575Singapore Fujian Key Laboratory of Special Energy Manufacturing Xiamen Key Laboratory of Digital Vision MeasurementHuaqiao UniversityXiamen 361021People’s Republic of China

Symmetric Na-ion cells using the NASICON-structured electrodes could simplify the manufacturing process,reduce the cost,facilitate the recycling post-process,and thus attractive in the field of large-scale stationary energy ***,the long-term cycling performance of such batteries is usually *** investigation reveals the unavoidable side reactions between the NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)anode and the commercial liquid electrolyte,leading to serious capacity fading in the symmetric NVP//NVP *** resolve this issue,an all-solid-state composite electrolyte is used to replace the liquid electrolyte so that to overcome the side reaction and achieve high anode/electrolyte interfacial *** ferroelectric engineering could further improve the interfacial ion conduction,effectively reducing the electrode/electrolyte interfacial *** NVP//NVP cell using the ferroelectric-engineered composite electrolyte can achieve a capacity retention of 86.4%after 650 ***,the electrolyte can also be used to match the Prussianblue cathode NaxFeyFe(CN)_(6−z)·nH_(2)O(NFFCN).Outstanding long-term cycling stability has been obtained in the all-solid-state NVP//NFFCN cell over 9000 cycles at a current density of 500 mA g^(-1),with a fading rate as low as 0.005%per cycle.

关键词： Sodium-ion battery NVP anode All-solid-state Cyclic stability Ferroelectric

Aerosol deposition technology and its applications in batteries

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Nano Materials Science 2024年第1期6卷 24-37页

作者： Xinyu Wang Ramon Alberto Paredes Camacho xiaoyu xu Yumei Wang Yi Qiang Hans Kungl Ruediger-AEichel Yunfeng Zhang Li Lu National University of Singapore(Chongqing)Research Institute Chongqing401123PR China National University of Singapore Singapore117576 Fundamental Electrochemistry(IEK-9) Institute of Energy and Climate ResearchForschungszentrum Jülich52425JülichGermany

Aerosol deposition(AD)method is a kind of additive manufacturing technology for fabricating dense films such as metals and ceramics at room *** resolves the challenge of integrating ceramic films onto temperaturesensitive substrates,including metals,glasses,and *** should be emphasized that the AD is a spray coating technology that uses powder without thermal assistance to generate films with high *** to the traditional sputter-based approach,the AD shows several advantages in efficiency,convenience,better interfacial bonding and so ***,it opens some possibilities to the field of batteries,especially all-solidstate batteries(ASSBs)and draws much attention not only for research but also for large scale *** purpose of this work is to provide a critical review on the science and technology of AD as well as its applications in the field of *** process,mechanism and effective parameters of AD,and recent developments in AD applications in the field of batteries will be systematically reviewed so that a trend for AD will be finally provided.

关键词： Aerosol deposition Room temperature impact consolidation Ceramic film All-solid-state battery Spray coating technology

Weakened tanning ability is an important mechanism for evolutionary skin lightening in East Asians

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Journal of Genetics and Genomics 2024年第7期51卷 703-713页

作者： Youwei Pu Siyu Pu Yanyan Chen Qinghong Kong xuyang Liu Qi Zhao Ke xu Jiuming Liu Mengyuan Li xiaoyu xu Xiaoyang Qiao Bing Su Jing Chen Zhaohui Yang Tianjian Laboratory of Advanced Biomedical Sciences Academy of Medical ScienceZhengzhou UniversityZhengzhouHenan 450052China Department of Pediatric Surgery and Laboratory of Pediatric Surgery West China HospitalSichuan UniversityChengduSichuan 610041China Guizhou Provincial College-based Key Lab for Tumor Prevention and Treatment with Distinctive Medicines Zunyi Medical UniversityZunyiGuizhou 563000China Yunnan Key Laboratory of Primate Biomedical Research Institute of Primate Translational MedicineKunming University of Science and TechnologyKunmingYunnan 650500China State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650223China

The evolution of light-skin pigmentation among Eurasians is considered as an adaptation to the high-latitude *** Asians are ideal populations for studying skin color evolution because of the complex environment of East ***,we report a strong selection signal for the pigmentation gene phenylalanine hydroxylase(PAH)in light-skinned Han Chinese *** intron mutation rs10778203 in PAH is enriched in East Asians and is significantly associated with skin color of the back of the hand in Han Chinese males(P<0.05).In vitro luciferase and transcription factor binding assays show that the ancestral allele of rs10778203 could bind to SMAD2 and has a significant enhancer activity for ***,the derived T allele(the major allele in East Asians)of rs10778203 decreases the binding activity of transcription factors and enhancer ***,the derived T allele of rs10778203 shows a weaker ultraviolet radiation response in A375 cells and zebrafish ***,rs10778203 decreases melanin production in transgenic zebrafish embryos after ultraviolet B(UVB)***,PAH is a potential pigmentation gene that regulates skin tanning *** selection has enriched the adaptive allele,resulting in weakened tanning ability in East Asians,suggesting a unique genetic mechanism for evolutionary skin lightening in East Asians.

关键词： East Asians PAH Skin pigmentation Natural selection Genetic adaptation

季铵盐化糖原衍生物/明胶复合水凝胶抗菌材料的制备及性能

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精细化工 2024年第3期41卷 597-606页

作者：纪倩徐晓宇陈曦陈敬华江南大学生命科学与健康工程学院江苏无锡214122

首先,利用乙二胺对糖原进行氨基化修饰得到氨基化糖原衍生物(N-Gly);接着,利用2,3-环氧丙基三甲基氯化铵(简称季铵盐)对N-Gly进行部分季铵盐化修饰,得到季铵盐化糖原衍生物(QA-N-Gly);然后,以明胶为基材通过酰胺键交联制备季铵盐化糖原... 详细信息

首先,利用乙二胺对糖原进行氨基化修饰得到氨基化糖原衍生物(N-Gly);接着,利用2,3-环氧丙基三甲基氯化铵(简称季铵盐)对N-Gly进行部分季铵盐化修饰,得到季铵盐化糖原衍生物(QA-N-Gly);然后,以明胶为基材通过酰胺键交联制备季铵盐化糖原衍生物/明胶复合水凝胶(QA-N-Gly/Gel)。对糖原衍生物进行FTIR、1HNMR、粒径、Zeta电位以及微观形貌的考察,并对QA-N-Gly/Gel水凝胶进行了理化性能和生物性能评价。结果表明,糖原的氨基化和季铵盐化修饰成功,QA-N-Gly为均匀分散的纳米粒子,粒径分布在100~200 nm,Zeta电位为(93.9±1.7)m V,粒子带有明显的正电荷,具有抗菌性。糖原衍生物的加入可以提高明胶基水凝胶体系的机械强度和稳定性,QA-N-Gly/Gel的断裂应力为66.8 kPa,压缩模量为13.3 kPa。QA-N-Gly/Gel具有明显的抑菌作用,对金黄色葡萄球菌和大肠杆菌的抑菌率分别达到97%和50%。此外,QA-N-Gly/Gel无溶血性,细胞毒性低,NIH-3T3细胞的48 h存活率在80%以上。

关键词：糖原季铵盐明胶水凝胶抗菌材料功能材料

环保投资对第二类代理成本的影响——兼论内部控制的调节效应

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南京审计大学学报 2024年第2期21卷 46-57页

作者：吴良海徐小玉安徽工业大学商学院安徽马鞍山243032

基于我国2011—2021年沪深A股上市公司数据,实证分析了环保投资、内部控制与第二类代理成本三者之间的关系。结果表明:环保投资有利于第二类代理成本的降低,且内部控制对环保投资降低第二类代理成本具有抑制作用。机制检验表明,环保投... 详细信息

基于我国2011—2021年沪深A股上市公司数据,实证分析了环保投资、内部控制与第二类代理成本三者之间的关系。结果表明:环保投资有利于第二类代理成本的降低,且内部控制对环保投资降低第二类代理成本具有抑制作用。机制检验表明,环保投资能够通过提高公司信息透明度和提升ESG表现降低第二类代理成本。进一步分析发现,环保投资对第二类代理成本的影响在外部监督压力大、非重污染和大股东“掏空”动机较低企业显著,且内部控制的抑制作用在外部监督压力弱和大股东“掏空”动机低组企业显著,而在其他方面并不具有显著性差异。研究从经济后果视角揭示了环保投资所具有的公司治理功效,这对于“双碳”战略践行、公司治理效率提升以及投资者利益保护均有现实意义。

关键词：环保投资第二类代理成本内部控制公司信息透明度 ESG表现公司治理效率

理工科优势高校智库咨政服务能力提升路径选择

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文化创新比较研究 2024年第22期8卷 112-117页

作者：许晓雨东南大学社会科学处江苏南京211102

全面提升理工科优势高校咨政服务能力,对于推进跨学科交叉研究和协同攻关、加快构建中国自主知识体系、推进国家治理能力与治理体系现代化有着积极意义。现阶段理工科优势高校学科优势有待进一步发挥,与综合性高校或哲学社会科学强校相... 详细信息

全面提升理工科优势高校咨政服务能力,对于推进跨学科交叉研究和协同攻关、加快构建中国自主知识体系、推进国家治理能力与治理体系现代化有着积极意义。现阶段理工科优势高校学科优势有待进一步发挥,与综合性高校或哲学社会科学强校相比,智库建设成效有待进一步提升。该文在相关文献综述的基础上,分析理工科优势高校咨政服务能力现状,并提出智库咨政服务能力提升路径:聚焦新兴领域,深入开展前沿科学战略研究;加强数字化转型,深入推动智库服务科技创新;强化多学科协同,深入构建智库合作网络;激发人才活力,深入推进智库体制机制改革。该文期望能为高校智库同行开展工作提供经验参考。

关键词：理工科优势高校智库建设咨政服务能力路径选择学科交叉中国自主知识体系

盘管式冰蓄冷空调技术蓄冰过程理论与实验研究

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中国电机工程学报 2024年第15期44卷 6057-6064,I0018页

作者：常春徐啸宇郭鑫鑫赵明智中国科学院电工研究所北京市海淀区100190 内蒙古工业大学能源与动力工程学院内蒙古自治区呼和浩特市010051 中国科学院大学北京市石景山区100049

冰蓄冷空调系统对电网调峰及改善用冷经济性有重要作用。该文通过对盘管式冰蓄冷系统的蓄冰过程研究发现,蓄冰过程包含两个明显阶段:第1阶段,10.0到4.0℃过程中,水的密度随温度降低而增大,4.0℃冷水迅速聚集到蓄冷单元底部,并逐渐充满... 详细信息

冰蓄冷空调系统对电网调峰及改善用冷经济性有重要作用。该文通过对盘管式冰蓄冷系统的蓄冰过程研究发现,蓄冰过程包含两个明显阶段:第1阶段,10.0到4.0℃过程中,水的密度随温度降低而增大,4.0℃冷水迅速聚集到蓄冷单元底部,并逐渐充满整个水域;第2阶段,4.0到0℃过程中,水的密度随着温度降低而减小。前期,换热管下表面最先出现冰层;后期,随着上方聚集的低温水增多,换热管上表面开始产生冰层。该实验中,当蓄冰过程进行到100 min时,换热管上下表面冰层厚度均达到8.56 mm。之后,上表面冰层厚度逐渐超过下表面。该研究揭示冰蓄冷单元内部自然对流及4.0℃时水的密度逆转对结冰过程的影响规律,对盘管式冰蓄冷系统的优化设计及运行控制有一定指导意义。

关键词：储能电网调峰蓄冷空调盘管蓄冰 4.0℃ 密度逆转

“身份误认”、梦中梦与铁手——论鲁迅《弟兄》中的几个果戈理要素

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绍兴文理学院学报 2024年第1期44卷 9-15页

作者：徐晓宇江苏大学文学院江苏镇江212013

鲁迅小说《弟兄》采用了“身份误认”的情节模式,与果戈理《钦差大臣》中的情节设置十分相近;主角张沛君的梦境在诸多细节上与果戈理《肖像》中的“梦中梦”一致,而梦中张沛君关键的躯体特征——“铁手”——可能源于果戈理《维》中的... 详细信息

鲁迅小说《弟兄》采用了“身份误认”的情节模式,与果戈理《钦差大臣》中的情节设置十分相近;主角张沛君的梦境在诸多细节上与果戈理《肖像》中的“梦中梦”一致,而梦中张沛君关键的躯体特征——“铁手”——可能源于果戈理《维》中的妖怪维。小说中三者共同服务于暴露隐秘的罪恶,这同样也是果戈理的宗教思想在创作中力图达到的目的。

关键词：鲁迅果戈理《弟兄》《钦差大臣》《肖像》《维》