Oxygen vacancyCarriers transport channelsOxidationAn amorphous phase TiO2 was fabricated via a fast and simple hydrolysis method and it was characterized with XRD, TEM, BET, UV-Vis, XPS and EPR. The as-prepared amorphous TiO2 has a specific surface area record-breaking 100 times that of crystal...
摘要: 为了研究TiO2氧空位形成的影响因素,用管式电阻炉在空气、Ar及不同温度下对TiO2烧结.采用扫描电子显微镜(SEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)对烧结TiO2样品的微观形貌、物相组成、元素及价态进行了表征,研究了烧结温度、烧结气氛和Ar+刻蚀对TiO2样品氧空位形成的影响.结果表明:相同气氛下,随着烧结温...
Juan Li, Lin Zhang, Xingda An, Kai Feng, Xuchun Wang, Jiari He, Yang Huang, Jingjing Liu, Liang Zhang, Binhang Yan, Chaoran Li, Le He, Tuning Adsorbate-Mediated Strong Metal-Support Interaction by Oxygen Vacancy: A Case Study in...
Figure 6(a)shows high resolution XPS spectrum of pure TiO2film. In this spectrum, the doublet ‘Ti2p3/2(binding energy 458.6 eV) and Ti2p1/2(binding energy 464.4 eV)’ arises from spin orbit-splitting. These peaks are consistent with Ti4+in TiO2lattice51. Also, the shoulder Ti2p...
Cu的L边XANES光谱(Figure 2c)和XPS能谱(Figure 2d)表明高度分散在TiO2表面单原子Cu主要以Cu1+形式存在。(3)分子氧和表面晶格氧的双重活化 ▲Figure 3. a: O2-temperature programmed desorption (O2-TPD) profile of Cu1/TiO2 a...
High-performance electrocatalytic conversion of N2 to NH3 using oxygen-vacancy-rich TiO2 in situ grown on Ti3C2T x MXene. Adv Energy Mater, 2019, 9: 1803406 补充材料 图S1 原位红外反应舱装置图 图S2 P0和P500的SEM图, P500的TEM以及能谱图 图S3 P0和P500的TEM以及相应的HRTEM图 图S4 催化剂...
Fig.2TDOS of pure (dashed line) and oxygen vacancy dop^d (real Lint) Anatase TiO^ crystal 以计算电子态密度的能量范围从-25~10eV。 如上图表示,完整的锐钛矿TiO2晶体的禁带宽度约为2.26eV, 价带宽度约为5.48eV。由此,可以看出,含氧空位的锐钛矿TiO2晶 体的电子态密度分布,在价带以及以下区域与完整的...
Chemical tuning of the TiO2 through hydrogen reduction (H-TiO2) is shown to increase oxygen-vacancy density and thereby modifies the electronic properties. H-TiO2 spheres with a polar surface serve as the surface-bound intermediates for strong polysulfides binding. Under the restricting and ...
Single-phase Ti1xMnxO2 films with x=0–8% were synthesized by plasma-assisted molecular beam epitaxy (PAMBE), and the effect of Mn content on the magnetic behaviors has been systemically investigated. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies indicate no Mn ...
To confirm the presence of the Ti3+ defects, we conducted high-resolution XPS. Two peaks of Ti 2p1/2 (464.6 eV) and Ti 2p3/2 (458.2 eV) are observed in Fig. 3a; after curve fitting, the Ti 2p3/2 was deconvoluted into two peaks centered at 459.1 eV and 457.6 eV. The...