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A Review on Metal-and Metal Oxide-Based Nanozymes:Properties,Mechanisms,and Applications 被引量:21
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作者 Qianwen Liu Amin Zhang +2 位作者 Ruhao Wang Qian Zhang Daxiang Cui 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第10期147-199,共53页
Since the ferromagnetic(Fe_(3)O_(4))nanoparticles were firstly reported to exert enzyme-like activity in 2007,extensive research progress in nanozymes has been made with deep investigation of diverse nanozymes and rap... Since the ferromagnetic(Fe_(3)O_(4))nanoparticles were firstly reported to exert enzyme-like activity in 2007,extensive research progress in nanozymes has been made with deep investigation of diverse nanozymes and rapid development of related nanotechnologies.As promising alterna-tives for natural enzymes,nanozymes have broadened the way toward clinical medicine,food safety,environmental monitoring,and chemical production.The past decade has witnessed the rapid development of metal-and metal oxide-based nanozymes owing to their remarkable physicochemical proper-ties in parallel with low cost,high stability,and easy storage.It is widely known that the deep study of catalytic activities and mechanism sheds sig-nificant influence on the applications of nanozymes.This review digs into the characteristics and intrinsic properties of metal-and metal oxide-based nanozymes,especially emphasizing their catalytic mechanism and recent applications in biological analysis,relieving inflammation,antibacterial,and cancer therapy.We also conclude the present challenges and provide insights into the future research of nanozymes constituted of metal and metal oxide nanomaterials. 展开更多
关键词 Metal-and metal oxide-based nanozymes Intrinsic properties Catalytic mechanism Applications
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Recent advances in diverse nanosystems for nitric oxide delivery in cancer therapy 被引量:1
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作者 Dan Gao Sajid Asghar +5 位作者 Rongfeng Hu Su Chen Ruixin Niu Jia Liu Zhipeng Chen Yanyu Xiao 《Acta Pharmaceutica Sinica B》 SCIE CAS CSCD 2023年第4期1498-1521,共24页
Gas therapy has been proven to be a promising and advantageous treatment option for cancers.Studies have shown that nitric oxide(NO)is one of the smallest structurally significant gas molecules with great potential to... Gas therapy has been proven to be a promising and advantageous treatment option for cancers.Studies have shown that nitric oxide(NO)is one of the smallest structurally significant gas molecules with great potential to suppress cancer.However,there is controversy and concern about its use as it exhibits the opposite physiological effects based on its levels in the tumor.Therefore,the anti-cancer mechanism of NO is the key to cancer treatment,and rationally designed NO delivery systems are crucial to the success of NO biomedical applications.This review summarizes the endogenous production of NO,its physiological mechanisms of action,the application of NO in cancer treatment,and nano-delivery systems for delivering NO donors.Moreover,it briefly reviews challenges in delivering NO from different nanoparticles and the issues associated with its combination treatment strategies.The advantages and challenges of various NO delivery platforms are recapitulated for possible transformation into clinical applications. 展开更多
关键词 Nitric oxide Nitric oxide donor Nitric oxide-based delivery system ANTI-CANCER Binding mechanisms Synergistic treatment strategy Inorganic platforms Organic platforms
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Oxide-based cathode materials for rechargeable zinc ion batteries:Progresses and challenges 被引量:5
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作者 Yingze Zhou Fandi Chen +6 位作者 Hamidreza Arandiyan Peiyuan Guan Yunjian Liu Yuan Wang Chuan Zhao Danyang Wang Dewei Chu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第6期516-542,I0013,共28页
With the increasing demands for electrical energy storage technologies,rechargeable zinc ion batteries(ZIBs)have been rapidly developed in recent years owing to their high safety,low cost and high energy storage capab... With the increasing demands for electrical energy storage technologies,rechargeable zinc ion batteries(ZIBs)have been rapidly developed in recent years owing to their high safety,low cost and high energy storage capability.The cathode is an essential part of ZIBs,which hosts zinc ions and determines the capacity,rate and cycling performance of the battery.The mainstream cathodes for ZIBs are oxidebased materials with tunnel,layer or 3 D crystal structures.In this review,we mainly focus on the latest advanced oxide-based cathode materials in ZIBs,including manganese oxides,vanadium oxides,spinel compounds,and other metal oxide based cathodes.In addition,the mechanisms of zinc storage and recent development in cathode design have been discussed in detail.Finally,current challenges and perspectives for the future research directions of oxide-based cathodes in ZIBs are presented. 展开更多
关键词 Zinc ion batteries oxide-based cathode Manganese oxides cathode Vanadium oxides cathode
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Recent progress of advanced manganese oxide-based materials for acidic oxygen evolution reaction: Fundamentals, performance optimization,and prospects 被引量:1
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作者 Mengwei Guo Rongrong Deng +1 位作者 Chaowu Wang Qibo Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第3期537-553,I0015,共18页
The oxygen evolution reaction(OER) is the basis of various sustainable energy conversion and storage techniques,especially hydrogen production by water electrolysis.To realize the practical application of hydrogen ene... The oxygen evolution reaction(OER) is the basis of various sustainable energy conversion and storage techniques,especially hydrogen production by water electrolysis.To realize the practical application of hydrogen energy and mass-scale hydrogen production via water electrolysis,several obstacles,such as the multi-electron transfer OER process with sluggish kinetics and overall high reaction barrier,should be overcome.Manganese oxide-based(MnOx) materials,especially MnO_(2),have emerged as promising non-noble electrocatalysts for water electro-oxidation under acidic conditions due to their wellbalanced properties between catalytic activity and stability.This review introduces the fundamental understanding of the catalytic OER process on MnOx-based materials,including the conventional adsorbate evolution mechanism(AEM) and emerging lattice oxygen oxidation mechanism(LOM).The rational screening and prediction of MnOx-based catalysts that can stably catalyze OER in acid are summarized based on Pourbaix diagram analysis and thermodynamic density functional theory(DFT) calculations.Then,the up-to-date progress of upgrading the OER catalytic performance of MnOx-based catalysts by composite construction is reviewed.Afterward,feasible strategies to improve the electrocatalytic activity and lifetime of MnOx-based catalysts are systemically discussed in terms of crystal structure control,reasonable setting of working potential and electrolyte environment,optimal selection of acid-stable conductive supports,and self-healing engineering.Finally,future scientific challenges and research directions are outlined to guide the construction of advanced MnOx-based electrocatalysts for OER in acid. 展开更多
关键词 Manganese oxide-based materials Manganese dioxides ELECTROCATALYSTS Oxygen evolution reaction Acidic solution
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Constructing a multifunctional mesoporous composite of metallic cobalt nanoparticles and nitrogen-doped reduced graphene oxides for high-performance lithium-sulfur batteries 被引量:3
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作者 Luhai Gai Chenhao Zhao +2 位作者 Ya Zhang Zhibiao Hu Qiang Shen 《Carbon Energy》 SCIE CAS 2022年第2期142-154,共13页
Electrochemical properties of lithium-sulfur(Li-S)batteries are mainly hindered by both the insulating nature of elemental sulfur(i.e.,molecular S8)and the shuttling effect or sluggish redox kinetics of lithium polysu... Electrochemical properties of lithium-sulfur(Li-S)batteries are mainly hindered by both the insulating nature of elemental sulfur(i.e.,molecular S8)and the shuttling effect or sluggish redox kinetics of lithium polysulfide intermediates(Li_(2)S_(n),3≤n≤8).In this paper,a three-dimensional mesoporous reduced graphene oxide-based nanocomposite,with the embedding of metallic Co nanoparticles and the doping of elemental N(Co/NrGO),and its simply ground mixture with powdered S at a mass ratio of 1:6(Co/NrGO/S)are prepared and used as cathode-/separator-coated interlayers and working electrodes in assembled Li-S cells,respectively.One of the effective cell configurations is to paste composite Co/NrGO onto both the S-loading cathode and separator,showing good cycling stability(1070mAh g^(−1) in the 100th cycle at 0.2 C),highrate capability(835mAh g^(−1),2.0 C),and excellent durability(905mAh g^(−1) in the 250th cycle at 0.5 or 0.2 C).Compared with the experimental results of Co-absent NrGO,electrochemical properties of various Co/NrGO-based cell configurations clearly show multiple functions of Co/NrGO,indicating that the absence of Co/NrGO coatings and/or Co nanoparticles may be inadequate to achieve superior S availability of assembled Li-S batteries. 展开更多
关键词 high-performance mechanism lithium-sulfur batteries MULTIFUNCTIONAL three-dimensional mesoporous reduced graphene oxide-based nanocomposite
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Development of Metal and Metal-Based Composites Anode Materials for Potassium-Ion Batteries 被引量:2
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作者 Jie Xu Shuming Dou +3 位作者 Yaqi Wang Qunyao Yuan Yida Deng Yanan Chen 《Transactions of Tianjin University》 EI CAS 2021年第3期248-268,共21页
Potassium-ion batteries(KIBs)are considered the next powerful potential generation energy storage system because of substantial potassium resource availability and similar characteristics with lithium.Unfortunately,th... Potassium-ion batteries(KIBs)are considered the next powerful potential generation energy storage system because of substantial potassium resource availability and similar characteristics with lithium.Unfortunately,the actual application of KIBs is inferior to that of lithium-ion batteries(LIBs),in which the fi nite energy density,ordinary circular life,and underdeveloped fabrication technique dominate the key constraints.Various works have recently been directed to growing novel anode electrodes with superior electrochemical capability.Noticeably,metals/metal oxides materials(e.g.,Sb,Sn,Zn,SnO_(2),and MoO_(2))have been widely investigated as KIBs anodes because of high theoretical capacity,suggesting outstanding promise for high-energy KIBs.In this review,the latest research of metals/metal oxides electrodes for potassium storage is summarized.The major strategies to control the electrochemical property of metals/metal oxides electrodes are discussed.Finally,the future investigation foreground for these anode electrodes has been proposed. 展开更多
关键词 Potassium-ion batteries Metal-based anodes Metallic oxide-based anodes Electrochemical performance Nanostructure
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Magnetic behaviors of cerium oxide-based thin films deposited using electrochemical method
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作者 彭英姿 李源 +2 位作者 白茹 霍德璇 钱正洪 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第9期432-438,共7页
Zn and Co multi-doped CeO2 thin films have been prepared using an anodic electrochemical method. The structures and magnetic behaviors are characterized by several techniques, in which the oxygen states in the lattice... Zn and Co multi-doped CeO2 thin films have been prepared using an anodic electrochemical method. The structures and magnetic behaviors are characterized by several techniques, in which the oxygen states in the lattice and the absorptive oxygen bonds at the surface are carefully examined. The absorptive oxygen bond is about 50% of the total oxygen bond by using a semi-quantitative method. The value of actual stoichiometry δ′ is close to 2. The experimental results indicate that the thin films are of a cerium oxide-based solid solution with few oxygen vacancies in the lattice and many absorptive oxygen bonds at the surface. Week ferromagnetic behaviors were evidenced by observed M-H hysteresis loops at room temperature. Furthermore, an evidence of relative ferromagnetic contributions was revealed by the temperature dependence of magnetization. It is believed that the ferromagnetic contributions exhibited in the M-H loops originate from the absorptive oxygen on the surface rather than the oxygen vacancies in the lattice. 展开更多
关键词 cerium oxide-based thin films anodic electrochemical method absorptive oxygen magnetic behaviors
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Synaptic plasticity and classical conditioning mimicked in single indium-tungsten-oxide based neuromorphic transistor
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作者 Rui Liu Yongli He +4 位作者 Shanshan Jiang Li Zhu Chunsheng Chen Ying Zhu Qing Wan 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第5期52-56,共5页
Emulation of synaptic function by ionic/electronic hybrid device is crucial for brain-like computing and neuromorphic systems.Electric-double-layer(EDL)transistors with proton conducting electrolytes as the gate diele... Emulation of synaptic function by ionic/electronic hybrid device is crucial for brain-like computing and neuromorphic systems.Electric-double-layer(EDL)transistors with proton conducting electrolytes as the gate dielectrics provide a prospective approach for such application.Here,artificial synapses based on indium-tungsten-oxide(IWO)-based EDL transistors are proposed,and some important synaptic functions(excitatory post-synaptic current,paired-pulse facilitation,filtering)are emulated.Two types of spike-timing-dependent plasticity(Hebbian STDP and anti-Hebbian STDP)learning rules and multistore memory(sensory memory,short-term memory,and long-term memory)are also mimicked.At last,classical conditioning is successfully demonstrated.Our results indicate that IWO-based neuromorphic transistors are interesting for neuromorphic applications. 展开更多
关键词 neuromorphic transistors synaptic plasticity oxide-based semiconductors classical conditioning
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Zinc Oxide-Based Q-Switched Erbium-Doped Fiber Laser
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作者 N.A.Aziz A.A.Latiff +2 位作者 M.Q.Lokman E.Hanafi S.W.Harun 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第4期43-45,共3页
We demonstrate a Q-switched erbium-doped fiber laser (EDFL) using a newly developed zinc oxide- (ZnO) based saturable absorber (SA). The SA is fabricated by embedding a prepared ZnO powder into a poly(vinyl alc... We demonstrate a Q-switched erbium-doped fiber laser (EDFL) using a newly developed zinc oxide- (ZnO) based saturable absorber (SA). The SA is fabricated by embedding a prepared ZnO powder into a poly(vinyl alcohol) film. A small piece of the film is then sandwiched between two fiber ferrules and is incorporated in an EDFL cavity for generating a stable Q-switching pulse train. The EDFL operates at 1560.4nm with a pump power threshold of 11.8mW, a pulse repetition rate tunable from 22.79 to 61.43kHz, and the smallest pulse width of 7.00 μs. The Q-switching pulse shows no spectral modulation with a peak-to-pedestal ratio of 62 dB indicating the high stability of the laser. These results show that the ZnO powder has a great potential to be used for pulsed laser applications. 展开更多
关键词 Zinc oxide-based Q-Switched Erbium-Doped Fiber Laser SA ZnO
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还原氧化石墨烯基三聚氰胺海绵的制备与吸附性能 被引量:19
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作者 王子涛 肖长发 +2 位作者 赵健 胡霄 徐乃库 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2014年第11期2410-2417,共8页
以天然石墨为原料,用Hummers法和超声剥离法制备了氧化石墨烯(GO).将氧化石墨烯浸渍,涂覆于三聚氰胺海绵表面,在线还原制得还原氧化石墨烯基三聚氰胺海绵(RGOME).通过扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)仪及... 以天然石墨为原料,用Hummers法和超声剥离法制备了氧化石墨烯(GO).将氧化石墨烯浸渍,涂覆于三聚氰胺海绵表面,在线还原制得还原氧化石墨烯基三聚氰胺海绵(RGOME).通过扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)仪及光学接触角测定仪等分析了RGOME的结构,考察了RGOME对多种油品的吸附性能,并对其油水选择吸附性能和循环使用性能进行了研究.结果表明,RGOME具有疏水超亲油性,对油品的吸附量达到56—127g/g,可用Bangham方程描述RGOME对甲苯和煤油的吸附动力学过程;在选择吸附过程中,油品浓度急剧降低,吸附量不断升高,分离效率达到74.49%,可较好地实现油水分离;吸附油品的RGOME经脱附可多次循环使用. 展开更多
关键词 还原氧化石墨烯基三聚氰胺海绵 吸附性能 油水分离 疏水超亲油性
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Photocatalytic CO2 reduction highly enhanced by oxygen vacancies on Pt-nanoparticle-dispersed gallium oxide 被引量:12
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作者 Yun-Xiang Pan Zheng-Qing Sun +4 位作者 Huai-Ping Cong Yu-Long Men Sen Xin Jie Song Shu-Hong Yu 《Nano Research》 SCIE EI CAS CSCD 2016年第6期1689-1700,共12页
Photocatalytic CO2 reduction on metal-oxide-based catalysts is promising for solving the energy and environmental crises faced by mankind. The oxygen vacancy (Vo) on metal oxides is expected to be a key factor affec... Photocatalytic CO2 reduction on metal-oxide-based catalysts is promising for solving the energy and environmental crises faced by mankind. The oxygen vacancy (Vo) on metal oxides is expected to be a key factor affecting the efficiency of photocatalytic CO2 reduction on metal-oxide-based catalysts. Yet, to date, the question of how an Vo influences photocatalytic CO2 reduction is still unanswered. Herein, we report that, on Vo-rich gallium oxide coated with Pt nanoparticles (Vo-rich Pt/Ga203), CO2 is photocatalytically reduced to CO, with a highly enhanced CO evolution rate (21.0umol.h-1) compared to those on Vo-poor Pt/Ga2O3 (3.9 gmol-h-1) and Pt/TiO2(P25) (6.7 gmol.h-1). We demonstrate that the Vo leads to improved CO2 adsorption and separation of the photoinduced charges on Pt/Ga203, thus enhancing the photocatalytic activity of Pt/Ga203. Rational fabrication of an Vo is thereby an attractive strategy for developing efficient catalysts for photocatalytic CO2 reduction. 展开更多
关键词 photocatalytic CO2reduction oxygen vacancy metal-oxide-based catalyst C02 adsorption
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Recent progress in transition-metal-oxide-based electrocatalysts for the oxygen evolution reaction in natural seawater splitting: A critical review 被引量:7
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作者 Meng Chen Nutthaphak Kitiphatpiboon +3 位作者 Changrui Feng Abuliti Abudula Yufei Ma Guoqing Guan 《eScience》 2023年第2期16-31,共16页
Direct electrolytic splitting of seawater for the production of H2 using ocean energy is a promising technology that can help achieve carbon neutrality.However,owing to the high concentrations of chlorine ions in seaw... Direct electrolytic splitting of seawater for the production of H2 using ocean energy is a promising technology that can help achieve carbon neutrality.However,owing to the high concentrations of chlorine ions in seawater,the chlorine evolution reaction always competes with the oxygen evolution reaction(OER)at the anode,and chloride corrosion occurs on both the anode and cathode.Thus,effective electrocatalysts with high selectivity toward the OER and excellent resistance to chloride corrosion should be developed.In this critical review,we focus on the prospects of state-of-the-art metal-oxide electrocatalysts,including noble metal oxides,non-noble metal oxides and their compounds,and spinel-and perovskite-type oxides,for seawater splitting.We elucidate their chemical properties,excellent OER selectivity,outstanding anti-chlorine-corrosion performance,and reaction mechanisms.In particular,we review metal oxides that operate at high current densities,near industrial application levels,based on special catalyst design strategies. 展开更多
关键词 Seawater splitting Hydrogen production Oxygen evolution reaction Chlorine evolution reaction Metal-oxide-based catalysts High current density
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氧化物稀磁半导体的研究进展 被引量:11
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作者 许小红 李小丽 +4 位作者 齐世飞 江凤仙 全志勇 范九萍 马荣荣 《物理学进展》 CSCD 北大核心 2012年第4期199-232,共34页
稀磁半导体是一种能同时利用电子的电荷和自旋属性,并兼具铁磁性能和半导体性能的自旋电子学材料。本文主要介绍ZnO、In2O3等氧化物稀磁半导体的研究进展,一是从实验角度介绍其制备、结构、磁性、电输运性质等特性;二是从理论角度对其... 稀磁半导体是一种能同时利用电子的电荷和自旋属性,并兼具铁磁性能和半导体性能的自旋电子学材料。本文主要介绍ZnO、In2O3等氧化物稀磁半导体的研究进展,一是从实验角度介绍其制备、结构、磁性、电输运性质等特性;二是从理论角度对其磁交换能、电子结构、居里温度和磁性产生的机制进行阐述;三是在稀磁半导体的基础上进一步延伸,介绍其相关的异质结构的磁电阻效应,并在文章的最后对氧化物稀磁半导体的研究进行总结和展望。 展开更多
关键词 氧化物稀磁半导体 自旋注入 异质结构
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锰基低温SCR脱硝催化剂抗硫抗水性能研究进展 被引量:9
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作者 周佳丽 王宝冬 +4 位作者 马静 李歌 孙琦 徐文强 李永龙 《环境化学》 CAS CSCD 北大核心 2018年第4期782-791,共10页
锰基催化剂以其良好的低温脱硝活性受到越来越多的关注,在低温脱硝领域具有广阔的应用前景.然而,在实际应用过程中,反应气氛中存在的SO_2和H_2O容易造成催化剂中毒失活.本文分析了锰基催化剂在低温氨选择性催化还原(NH_3-SCR)过程中SO_2... 锰基催化剂以其良好的低温脱硝活性受到越来越多的关注,在低温脱硝领域具有广阔的应用前景.然而,在实际应用过程中,反应气氛中存在的SO_2和H_2O容易造成催化剂中毒失活.本文分析了锰基催化剂在低温氨选择性催化还原(NH_3-SCR)过程中SO_2和H_2O的中毒机理,重点介绍了提高锰基催化剂抗硫抗水性方面的研究进展,从添加过渡金属助剂、改变形貌和改变制备方法等3个方向展开分析.最后针对目前锰基催化剂存在的问题,提出了改进意见,并对锰基脱硝催化剂未来的发展方向和应用前景进行了展望. 展开更多
关键词 锰氧化物 低温脱硝 氨选择催化还原 抗硫抗水 中毒失活
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热障涂层材料体系研究现状及展望 被引量:4
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作者 史天杰 张鑫 +2 位作者 彭浩然 原慷 韩日飞 《热喷涂技术》 2023年第2期1-12,共12页
随着先进航空发动机推进引擎向着高推动力和长服役寿命的方向发展,如今传统的含有6-8wt%的氧化钇稳定氧化锆(6-8YSZ)热障涂层材料体系,在服役温度1200℃以上时,YSZ陶瓷涂层会发生高温相变,产生涂层间的热应力,最终导致涂层剥落失效,因... 随着先进航空发动机推进引擎向着高推动力和长服役寿命的方向发展,如今传统的含有6-8wt%的氧化钇稳定氧化锆(6-8YSZ)热障涂层材料体系,在服役温度1200℃以上时,YSZ陶瓷涂层会发生高温相变,产生涂层间的热应力,最终导致涂层剥落失效,因此新材料体系的引入和涂层结构的改进刻不容缓。本文介绍了传统YSZ的发展历史并且阐述了掺杂稀土氧化物稳定氧化锆、钙钛矿结构和稀土锆酸盐(A2Zr2O7)即烧绿石结构等陶瓷材料体系的研究进展和发展前景,并分析了新型氧化铪基体陶瓷热障涂层体系和高熵材料体系涂层研究现状和未来发展趋势,最后对新型热障涂层材料的问题和发展进行了总结和展望。 展开更多
关键词 热障涂层 稀土改性涂层 氧化铪基涂层 高熵陶瓷涂层
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Li_2O助烧的Gd_(0.1)Ce_(0.9)O_(1.95)烧结过程及其电导性能研究 被引量:6
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作者 杨志宾 朱腾龙 +2 位作者 项文龙 于立安 韩敏芳 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2015年第4期345-350,共6页
氧化铈基电解质是中低温固体氧化物燃料电池最常用的材料之一。本研究利用密度泛函理论计算方法阐述了Li2O和Ce O2分子之间的相互作用,计算结果表明Li2O对Ce O2具有助烧作用。在此基础上,在氧化铈基电解质Gd0.1Ce0.9O1.95(GDC)中掺入... 氧化铈基电解质是中低温固体氧化物燃料电池最常用的材料之一。本研究利用密度泛函理论计算方法阐述了Li2O和Ce O2分子之间的相互作用,计算结果表明Li2O对Ce O2具有助烧作用。在此基础上,在氧化铈基电解质Gd0.1Ce0.9O1.95(GDC)中掺入不同比例(0~5mol%)Li2O,通过烧结曲线测试及扫描电镜分析了其实际烧结过程,并对其电化学性能进行了研究。实验结果表明,添加Li2O后,GDC的烧结开始收缩温度明显向低温偏移,随掺杂量的增加,最大收缩速率的温度也逐渐降低,其中掺入2.5mol%Li2O-GDC在650℃就开始迅速收缩,900℃时相对致密度在99%以上;添加Li2O后,GDC总电导率提高,同时电池开路电压没有降低。因此,Li2O是一种很好的燃料电池氧化铈基电解质的助烧剂,具有很好的应用前景。 展开更多
关键词 氧化铈基电解质 烧结助剂 固体氧化物燃料电池
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基于电化学的固态CO_2传感器研究进展 被引量:6
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作者 刘超 王燕刚 +2 位作者 康诗飞 朱培怡 李溪 《传感器与微系统》 CSCD 北大核心 2012年第6期1-4,共4页
用于检测环境中气体的电位传感器已经在传感器技术领域发展为一个成熟的方向。由于在各个行业有着广泛的应用,可靠廉价的CO2传感器有着巨大的市场潜力。总结了基于电化学的固态CO2传感器类型,分析了它们的检测过程,提供关于其传感原理... 用于检测环境中气体的电位传感器已经在传感器技术领域发展为一个成熟的方向。由于在各个行业有着广泛的应用,可靠廉价的CO2传感器有着巨大的市场潜力。总结了基于电化学的固态CO2传感器类型,分析了它们的检测过程,提供关于其传感原理和特性研发的广泛概述,并描绘了基于电化学的固态CO2传感器在未来各种应用的可能性。 展开更多
关键词 CO2传感器 电化学传感器 固体电解质 金属氧化物传感器 聚合物传感器
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铁氧化物生物多孔陶粒的制备工艺及性能 被引量:6
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作者 鲍腾 陈冬 +2 位作者 陈天虎 庆承松 朱晓 《复合材料学报》 EI CAS CSCD 北大核心 2014年第2期408-415,共8页
以针铁矿(Goethite,GT)、锯末(成孔剂)和凹凸棒石黏土(粘结剂)为原料,在空气气氛下煅烧,制备出符合国家水处理标准的铁氧化物生物多孔陶粒(Iron Oxide-based Porous Ceramsite,IPC)。利用所制备IPC的抗压强度作为评价IPC质量的... 以针铁矿(Goethite,GT)、锯末(成孔剂)和凹凸棒石黏土(粘结剂)为原料,在空气气氛下煅烧,制备出符合国家水处理标准的铁氧化物生物多孔陶粒(Iron Oxide-based Porous Ceramsite,IPC)。利用所制备IPC的抗压强度作为评价IPC质量的指标,通过单因素实验、正交实验来优化IPC的物料配比和煅烧工艺,并通过XRD、SEM,偏光显微镜(Polarizing Microscope-PM),比表面积(BET-SSA)等技术来表征IPC孔结构特征及其特性。结果表明:IPC材料的孔连通性好,大孔孔径为10~20μm,抗压强度达到51~78N,比表面积为79m2/g,是一种以开放孔隙为主的多孔生物陶粒。在一定培养条件下进行陶粒的挂膜实验,结果表明,微生物可以通过IPC开放性孔隙深入IPC内部附着生长,该多孔陶粒生物负载量高于市售陶粒和颗粒沸石,可望为曝气生物滤池提供新的功能性载体材料。 展开更多
关键词 凹凸棒石黏土 针铁矿 赤铁矿 抗压强度 生物多孔陶粒
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硫化氢催化氧化技术的研究进展 被引量:5
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作者 尹梦雪 樊飞跃 +1 位作者 赵龙 侯红 《环境工程技术学报》 CAS 2020年第3期475-481,共7页
随着经济的发展以及人们对环保的重视,国家层面对硫化氢(H2S)的排放进行了严格的规定。因此,对H2S的去除材料成为研发重点。催化氧化技术是去除H2S的主要方法,目前研究较为深入的催化剂有炭基催化剂(包括无负载活性炭)、金属负载活性炭... 随着经济的发展以及人们对环保的重视,国家层面对硫化氢(H2S)的排放进行了严格的规定。因此,对H2S的去除材料成为研发重点。催化氧化技术是去除H2S的主要方法,目前研究较为深入的催化剂有炭基催化剂(包括无负载活性炭)、金属负载活性炭和金属氧化物催化剂(包括金属氧化物负载催化剂、金属氧化物催化剂和阴离子黏土负载催化剂)。详细介绍了2种催化剂的催化氧化原理、制备方法、去除效果和应用前景:炭材料由于其巨大的比表面积、高孔隙率和可以改性的表面活性位是催化剂或载体的热门选择,而炭基催化剂具有相对较低的操作温度和良好的稳定性,不需要遵循严格的O2和H2S化学计量比,但只能处理低浓度H2S,且要求在较低的空速下进行,催化剂必须定期进行再生;金属氧化物催化剂可以处理高浓度H2S,且在较高的温度(200~300℃)下有良好的催化性能,但由于其操作过程需要遵循严格的O2和H2S化学计量比和较高的温度,且再生性能差,因此成本较高;富氮多孔炭和负载碱金属的碱性毫米级中孔炭球(MCS)表现出优异的催化性能。在此基础上,对H2S催化氧化技术的发展方向进行了展望。 展开更多
关键词 硫化氢 催化氧化 炭基催化剂 金属氧化物催化剂
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低浓度甲烷甲醇深度氧化Ag/La_(0.6)Sr_(0.4)MnO_3催化剂 被引量:4
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作者 王伟 林国栋 +1 位作者 张鸿斌 熊智涛 《物理化学学报》 SCIE CAS CSCD 北大核心 2000年第4期299-305,共7页
用柠檬酸溶胶 凝胶法制备钙钛矿型La0.6Sr0.4MnO3 氧化物,并用Ag对其进行修饰,制得Ag/La0.6Sr0.4MnO3 系列催化剂.结果表明 ,6 %Ag/La0.6Sr0.4MnO3 催化剂上甲烷或甲醇氧化转化95 %时的反应温度T95 可低至735K(对CH4)或421K(对CH3OH);... 用柠檬酸溶胶 凝胶法制备钙钛矿型La0.6Sr0.4MnO3 氧化物,并用Ag对其进行修饰,制得Ag/La0.6Sr0.4MnO3 系列催化剂.结果表明 ,6 %Ag/La0.6Sr0.4MnO3 催化剂上甲烷或甲醇氧化转化95 %时的反应温度T95 可低至735K(对CH4)或421K(对CH3OH);适量Ag的负载修饰并不改变催化剂基质氧化物La0.6Sr0.4MnO3 的纳米级钙钛矿型结构;Ag的掺杂诱使催化剂中部分Mn3 +氧化为Mn4 +;Ag组分与钙钛矿型氧化物基质La0.6Sr0.4MnO3 展开更多
关键词 钙钛矿型 金属催化剂 甲烷 甲醇 催化氧化
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