Role of different coordinated Cu and reactive oxygen species on the highly active Cu–Ce–Zr mixed oxides in NH3-SCO: a combined in situ EPR and O2-TPD approach

2016 ◽  
Vol 6 (12) ◽  
pp. 4491-4502 ◽  
Author(s):  
Zhenping Qu ◽  
Zhong Wang ◽  
Xiaoyu Zhang ◽  
Hui Wang
Keyword(s):  
Reactive Oxygen Species ◽  
Citric Acid ◽  
Mixed Oxides ◽  
Sol Gel ◽  
Oxygen Species ◽  
Gel Method ◽  
Sol Gel Method ◽  
Highly Active

Novel Cu–Ce–Zr mixed oxides were synthesized by a citric acid sol–gel method, and they exhibited an excellent NH3-SCO activity (180 °C, TOF = 1.33 h−1).

Elucidating the nature and role of copper species in catalytic carbonylation of methanol to methyl acetate over copper/titania–silica mixed oxides

2017 ◽  
Vol 7 (16) ◽  
pp. 3511-3523 ◽  
Author(s):  
Xianjie Meng ◽  
Heqin Guo ◽  
Qiang Wang ◽  
Yong Xiao ◽  
Congbiao Chen ◽  
...  
Keyword(s):  
Mixed Oxide ◽  
Methyl Acetate ◽  
Mixed Oxides ◽  
Sol Gel ◽  
Copper Species ◽  
Gel Method ◽  
Sol Gel Method ◽  
Catalytic Carbonylation

In this study, a series of copper/titania–silica mixed oxide (Cu/TS) catalysts with different copper contents were prepared by a sol–gel method.

KNN-BF Lead-Free Piezoelectric Ceramics Synthesized by Sol-Gel Method

2015 ◽  
Vol 740 ◽  
pp. 3-6
Author(s):  
Guo Yuan Cheng ◽  
Xing Hua Fu ◽  
Xin Jin ◽  
Wen Hong Tao ◽  
Yu Qin Qiang
Keyword(s):  
Comparative Analysis ◽  
Citric Acid ◽  
Dielectric Loss ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Gel Method ◽  
Sol Gel Method ◽  
Metal Chelator

KNN-BF piezoelectric ceramics synthesized by sol-gel method in this experiment. By controlling bismuth and iron content in the system to study effects of them. We selected citric acid as metal chelator and ethylene glycol as esterification agent. PH maintained 5-6 during preparation of the sol. Sintering temperature of ceramic selected 1100°C. Preparation ceramics under these conditions and comparative analysis, the structure of ceramics is single perovskite and shap of crystals are square block. With the increase of x, properties of ceramics firstly increases and then decreases: d33, εr, Qm, Kpreaching the maximum, values of them were 136pC/N, 630(f =1KHz), 212, 0.41 respectively; dielectric loss to minimum is 0.07(f =1KHz); at this point, ceramics had best performance.

X-ray absorption and XPS study of titanium mixed oxides synthesized by the sol–gel method

2001 ◽  
Vol 114-116 ◽  
pp. 307-311 ◽  
Author(s):  
José E. Gonçalves ◽  
Sandra C. Castro ◽  
Aline Y. Ramos ◽  
Maria C.M. Alves ◽  
Yoshitaka Gushikem
Keyword(s):  
Mixed Oxides ◽  
Sol Gel ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Xps Study ◽  
X Ray Absorption

scholarly journals Preparation and stress-strain behavior of in-situ epoxidized natural rubber/SiO2 hybrid through a sol-gel method

2018 ◽  
Vol 12 (2) ◽  
pp. 180-185 ◽  
Author(s):  
S. M. Li ◽  
T. W. Xu ◽  
Z. X. Jia ◽  
B. C. Zhong ◽  
Y. F. Luo ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Sol Gel ◽  
Epoxidized Natural Rubber ◽  
Stress Strain ◽  
Gel Method ◽  
Sol Gel Method ◽  
Strain Behavior

Preparation of amphiphilic nano-sized NaA/glass films and powders using layer-by-layer in-situ sol–gel method

2015 ◽  
Vol 213 ◽  
pp. 1-7 ◽  
Author(s):  
Fei Tong ◽  
Jie Gong ◽  
Ming Li ◽  
Changfeng Zeng ◽  
Lixiong Zhang
Keyword(s):  
Sol Gel ◽  
Layer By Layer ◽  
Gel Method ◽  
Sol Gel Method ◽  
Glass Films

Insights into the role of strontium in toluene catalytic combustion over La1-xSrxCoO3 perovskites catalysts

2022 ◽  
Author(s):  
Mo Liu ◽  
Xiaoli Yang ◽  
ZiMeng Tian ◽  
Huimin Wang ◽  
Liangtao Yin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Combustion ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
A Site

A series of LaCoO3 pervoskite catalysts substituted by Sr in A site (La1-xSrxCoO3) were prepared via a facile sol-gel method. The catalytic activity of these pervoskite catalysts for the deep...

In Situ Synthesis of SiO2 Nanoparticles by Sol-Gel Method on Cotton Fabrics and Investigation of their Physical and Chemical Properties

2021 ◽  
Vol 891 ◽  
pp. 37-42
Author(s):  
Sheila Shahidi ◽  
Hakimeh Mohammadbagherloo ◽  
Seyedmohammad Elahi ◽  
Sanaz Dalalsharifi ◽  
Rattanaphol Mongkholrattanasit
Keyword(s):  
Flame Retardant ◽  
Water Drop ◽  
Sol Gel ◽  
Cotton Fabrics ◽  
In Situ Synthesis ◽  
Order Structure ◽  
Gel Method ◽  
Sol Gel Method ◽  
Flame Retardant Properties

In this paper, the sol-gel method was used for in-situ synthesis of SiO2 nanoparticles (NPs) on cotton fabrics with tetraethyl orthosilicate (TEOS) in the presence of acid and alkaline indicators. The samples were characterized using by (X-ray diffraction) XRD, (scanning electron Microscopy) SEM, (Inductively coupled plasma) ICP, water drop test and also the flame retardant properties were studied by char yield. The SEM images showed that the nanoparticles are spherical in shape and the acidity or alkalinity of the medium has an effect on the formation of particles. The XRD patterns showed the typical diffraction of amorphous SiO2 (Si-O short-order structure), also ICP analysis showed that by washing the fabrics, the nanoparticles are still present on the fabric, and this indicated the stability of the washing of the fabrics impregnated with the nanoparticles. By in-situ synthesis of SiO2 nanoparticles, the flame retardant properties have been improved significantly and the amount of residual char was increased and samples were observed to be hydrophilic.

Enhancement of photocatalytic properties of Cr2O3–TiO2 mixed oxides prepared by sol–gel method

2011 ◽  
Vol 11 (3) ◽  
pp. 358-361 ◽  
Author(s):  
Young-Soo Jung ◽  
Kyung-Hwa Kim ◽  
Tae-Young Jang ◽  
Yongsug Tak ◽  
Sung-Hyeon Baeck
Keyword(s):  
Mixed Oxides ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Gel Method ◽  
Sol Gel Method
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