Oxygen vacancyX-ray photoelectron spectroscopyUV detectorIn this paper, the effect of sputtering distance between target and substrate (DTS) on the structural, morphological and optical properties of TiO2 films were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed ...
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...
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...
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...
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...
The thickness of the TiO2 nanosheets was found to be 10 nm as evident from FESEM while the XPS study confirms the oxygen vacancy induced defect state. The device was tested for temperatures ranging from 27°C to 200°C. It showed the maximum response of ∼ 244% at an optimum ...
通过改变La2O3含量及焙烧温度,并借助XRD、BET、SEM、TEM、NH3-TPD、H2-TPR及XPS等表征手段,讨论了La2O3-V2O5-WO3/TiO2催化剂结构与NH3-SCR低温性能之间的内在关联。结果发现,La2V6W5/TiO2催化剂活性最佳,以NO转化率90%为标准,其工作窗口温度范围下限低至160 ℃。La2O3的加入提升了催化剂中V4+浓度,改善了...
Interplay between strain and oxygen vacancies in lanthanum aluminate We evaluate the interplay between epitaxial strain and oxygen vacancy formation in the perovskite-structure oxide lanthanum aluminate, LaAlO$_3$. Using density functional theory within the GGA$+U$ approximation we calculate the dependenc...
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...