nanoparticlesoxidationplasma materials processingscanning tunnelling microscopystoichiometrythermal stabilitythin filmsA Cu 1 O 1.7 oxide film containing a large amout of superstoichiometric oxygen was obtained by low-temperature oxidation of metallic copper in the oxygen plasma. An STM study of the film ...
案例八:已有研究表明,CuO/TiO2中Cu的价态极大程度地影响其还原能力,且CuOx提高TiO2光催化活性的机理研究并不透彻。 M Lei, N Wang, L Zhu,等. Photocatalytic reductive degradation of polybrominated diphenyl ethers on CuO/TiO2 nanocomposites: A mechanism based on the switching of photocatalytic reduction pot...
结合材料结构可知, Cu 元素主要以金属态(Cu 1) 及CuO (金属表面存在的氧化层, Cu2) 的化学态存在,其中金属态与氧化态的铜物种摩尔比为-4:5; Cr 元素主要以三氧化二铬的化学态存在, Cl元素主要以可能的金属氯化物的化学态形式存在, S 元素主要以可能的硫酸盐形式存在。 进一步对表面不同元素进行定量分析,...
氧元素是自然界中广泛存在的化学元素之一,它在许多化学反应以及生命活动中都扮演着重要的角色。在研究氧元素的性质时,人们通常会采用X射线光电子能谱(XPS)这种表面分析技术进行研究。然而,对于氧元素的XPS谱线,人们却发现出现了三个峰,这一现象一度让人感到困惑。那么,为什么氧元素的XPS会出现三个峰呢?下面我们进行...
These studies illustrate that the catalytic interface can be significantly influenced by the reactive atmosphere, affecting model single-crystal surfaces, nanoparticles, and even atomic clusters and single-atom catalysts (Figure 1a). Thus, to establish a direct correlation between the active surface of ...
XPS study of the Cu@Cu2O core-shell nanoparticles Cu@Cu 2O core-shell nanoparticles on the a-C:H thin films are prepared by co-deposition of RF-Sputtering and RF-PECVD. The samples with different Cu concen... T Ghodselahi,MA Vesaghi,A Shafiekhani,... - 《Applied Surface Science》 ...
Antibacterial and photocatalytic properties of SiO<inf>2</inf>-Cu<inf>x</inf>O films with high copper loading and crystallized Cu<inf>x</inf>O nanoparticles 2021, Surfaces and Interfaces Show abstract Toward green flotation: Interaction of a sophorolipid biosurfactant with a copper sulfide 2021,...
Immobilization of crystalline Fe2O3 nanoparticles over SiO2 for creating an active and stable catalyst: A demand for high temperature sulfuric acid decompo... To address the issues of catalytic activity and stability of the promising Fe2O3/SiO2 catalyst for sulfuric acid decomposition, Fe2O3 was...
Laser ablation of pure copper was performed using a pulsed Nd:YAG laser operating at 355 nm in air. Oxide nanoparticles redeposited near the edge of the crater results in the formation of the halo. Chemical states in both crater and halo were measured by X-ray photoelectron spectroscopy (XPS...
X-ray photoelectron spectroscopy (XPS) characterization indicates that the surface of the Cu nanoparticles oxidizes when they are exposed to air. The results are indicative that the shell of nanoparticle is mainly Cu 2O phase with CuO cover thin layer. Surface plasmon resonance (SPR) peak that ...