Results 31 to 40 of about 367,603 (169)

Fe Nanoclusters Regulate Surface Electronic Structure and Promote Charge Extraction for Enhanced Photocatalytic Degradation Through Heterojunction Engineering in ZnIn2S4

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Metal nanoclusters provide abundant catalytically active sites and unique electronic structures that are highly beneficial for enhancing photocatalytic performance; however, their practical application is often hindered by poor photostability.
Yiying Qin   +6 more
wiley   +1 more source

异质结构材料的傅立叶变换光萤光谱的测试与分析

open access: yesGuangtongxin yanjiu, 1996
介绍了傅立叶交换光萤光谱测试的基本原理;报道了用PL6120设备测得的一些典型的异质结构材料光萤光谱;分析和讨论了光萤光双峰结构、光萤光谱异常温度特性等问题;指出了异质界面上原子排列无序和内应力是造成这些异常现象的物理原因。
丁国庆
doaj  

Defect Engineering of Carbon Frameworks Driven All‐Slope Hard Carbon Anodes for Fast‐Charging Sodium‐Ion Batteries

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Fast‐charging capability is one of the crucial factors determining the application prospects of sodium‐ion batteries (SIBs). Nevertheless, the mismatched sodium storage kinetics and Coulombic efficiency (CE) in hard carbon anodes are bottlenecks in the implementation of fast‐charging SIBs. Herein, we propose a facile pre‐carbonization strategy
Qixin Liu   +8 more
wiley   +1 more source

ATR FTIR技术在赛加羚羊角鉴别中的应用分析

open access: yes野生动物学报, 2019
利用衰减全反射红外光谱技术,对赛加羚羊等3个物种共49份相关样本进行检测、分析并计算其相关系数,结果:同支羚羊角壳不同取样部位红外光谱相关系数为96.69%—99.43%;不同羚羊角壳相同取样部位红外光谱相关系数为94.24%—99.43%;不同物种角质壳红外光谱相关系数为99.28%—99.47%;羚羊角壳与其骨质芯混合物红外光谱随角骨比例变化,骨质成分越多,其红外光谱与羚羊角壳红外光谱的相关系数越低。由此推断红外光谱因取样部位、个体及物种不同而产生差异,且个体间和取样部位差异甚至大于种间差异 ...
刘闯李超金煜
doaj  

Synergetic Ruthenium Clusters and Ligand Motifs in Insoluble Polyoxometalates for Efficient Urea Electrosynthesis

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT The electrocatalytic co‐reduction of CO2 and nitrate (NO3− ${\text{NO}}_{3}^{-}$) to synthesize urea presents a sustainable alternative to traditional industrial processes, yet its efficiency is fundamentally limited by the kinetically mismatched activation and coupling of CO2 and NO3− ${\text{NO}}_{3}^{-}$.
Jiayu Liu   +9 more
wiley   +1 more source

一种透射式光栅光谱仪

open access: yes, 2014
本实用新型涉及一种透射式光栅光谱仪,可以将光分成光谱进行记录和输出。光谱仪包括入射狭缝,准直透镜,光栅,聚焦透镜,反射镜,光电转换装置。光谱仪准直透镜和聚焦透镜的使用采用共光轴光路方式,在较短波长范围内,色差和像差影响小,光谱分辨率高,通光效率高,杂散光少,调节方便,结构稳定。适用于固定激发波长的拉曼光谱测试 ...
 黄保坤   +3 more
core  

以Hg光源为标准谱对可见至近红外区域光谱定标的研究

open access: yes四川大学学报. 自然科学版, 1998
以Hg光谱为标准,采用光学多道分析器光栅多色仪的多点定标方法,对可见至近红外区域(0.4~1.1μm)范围的光谱进行了波长标量,并对Ne,H2及激光二极管光谱进行了实际测量,其中对Ne用四点标定的误差不大于0.38nm.
靳丽红   +3 more
doaj  

Dual‐Layer Solid Electrolyte Interphase Enables Effective Suppression of Lithium Dendrites

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT The heterogeneous solid electrolyte interphase (SEI) at the Li metal anode often leads to slow and uneven Li+ flux, causing severe Li dendrite growth. Herein, we combine X‐ray photoelectron spectroscopy and cryogenic transmission electron microscopy to demonstrate that a dual‐layer SEI, consisting of an inorganic inner layer and an organic ...
Huaping Wang   +4 more
wiley   +1 more source

紫外光和可见光吸收光谱法

open access: yes, 1988
美国分析化学(Anal.Chem.)杂志每两年分专题发表一次基础(?)评(Fund.Rev.)比较全面地总结了两年来在本专题范围内所获得的最新成就,信息量极为丰富,这对分析测试工作者了解世界发展动态,很有参考价值——可以说,读了它基本上可起到"秀才不出门,全知天下事"的作用。为此,我们从第5卷第2辑起选登有关光谱(能谱)分析几个专题的译文,同时附上参考文献,以便读者查找。所选专题是:拉曼光谱学,分子荧光、磷光和化学发光光谱法,X 射线光谱法,表面分析:X 射线光电子能谱学和俄歇电子能谱学 ...
黄鑫泉   +6 more
core  

Copper Slag‐Derived Cu3Fe17@C Alloy Enabling Efficient Peroxymonosulfate Activation for Levofloxacin Degradation via Cu‐Mediated Electron Transfer With Suppressed Metal Leaching

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Although alloy‐based materials present potential for peroxymonosulfate (PMS) activation, metal ion leaching remains severely restricted during the pollution degradation process. Herein, the porous carbon‐supported Fe–Cu alloy derived from industrial copper slag was prepared to remove the organic pollutants from wastewater while inhibiting the ...
Xuanren Chen   +10 more
wiley   +1 more source

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