Synthesis of Surface-Modification-Oriented Nanosized Molybdenum Disulfide with High Peroxidase-Like Catalytic Activity for H2 O2 and Cholesterol Detection

2018 ◽  
Vol 24 (59) ◽  
pp. 15868-15878 ◽  
Author(s):  
Dongqing Ma ◽  
Jie Yu ◽  
Wenyan Yin ◽  
Xiao Zhang ◽  
Linqiang Mei ◽  
...  
Keyword(s):  
Surface Modification ◽  
Catalytic Activity ◽  
Molybdenum Disulfide ◽  
Cholesterol Detection

Enhanced catalytic activity of Ni-Re/H- AlMCM-41 catalyst via surface modification for hydrodenitrogenation of o-toluidine

2018 ◽  
Vol 5 (6) ◽  
pp. 065516 ◽  
Author(s):  
K Sureshkumar ◽  
K Shanthi ◽  
N R Sasirekha ◽  
J Jegan ◽  
S J Sardhar Basha
Keyword(s):  
Surface Modification ◽  
Catalytic Activity

THE EFFECT OF GEL WATER ON CATALYTIC ACTIVITY: III. THE DECOMPOSITION OF FORMIC ACID OVER ALUMINA

1943 ◽  
Vol 21b (2) ◽  
pp. 21-33
Author(s):  
L. A. Munro ◽  
D. J. Dewar ◽  
S. Gertsman ◽  
G. Monteith
Keyword(s):  
Surface Modification ◽  
Catalytic Activity ◽  
Formic Acid ◽  
Water Content ◽  
Maximum Activity ◽  
Hydrous Oxide ◽  
X Ray ◽  
Fibril Structure ◽  
Two Peaks ◽  
Catalytic Power

The effect of gel water content on the catalytic activity of alumina in the decomposition of formic acid at 215 and 250 °C. has been investigated. The previous observations on the dehydration of ethyl alcohol to ether and ethylene are paralleled by the results with formic acid. There are two peaks in the curves showing the relation between activity and gel water content. The ratio CO/CO2 changes with gel water content, i.e., the course of the reaction can be altered by surface modification of the catalyst. The gel showing maximum catalytic activity exhibits greatest sorption. The temperature of activation of a hydrous oxide is not as accurate a measure of the catalytic power as the gel water content. X-ray studies of the catalysts show a threefold change in the structure in the 36 to 0% range of water content, but the fibril structure of the gel of maximum activity (5.3% water) is the same as that for minimum activity. An explanation is suggested.

Preparation and Properties Study on the Composites of Polypropylene and Polyphenylene Sulfide Filled by Modified Molybdenum Disulfide

2009 ◽  
Vol 87-88 ◽  
pp. 345-350
Author(s):  
Jian Qiang Zhang ◽  
Hui Xia Feng ◽  
Jian Hui Qiu
Keyword(s):  
Surface Modification ◽  
Molybdenum Disulfide ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Polyphenylene Sulfide ◽  
X Ray Diffraction ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
The Fourier Transform ◽  
Wear Modes

The wet surface modification process were used in this work to get the well lipophilic molybdenum disulfide (MoS2) powders and the modified MoS2 were filled into the polyphenylene sulfide (PPS) and polypropylene (PP) powders with different proportions to make polymeric based composites through hot-press molding equipment. The Fourier transform infrared spectrometer (FT-IR) analysis showed that the modification agents of stearic acid (SA), orγ-Methacryloxypropyl trimethoxy silane(KH570 or A-174), could react with the adsorption hydroxyl(−OH) of the MoS2 powders and finally form chemical coatings, the SA could form a layer of physics wrap too. The powder X-ray diffraction (XRD) analysis reveled that the SA or KH570 could not change the laminated structure of MoS2. The wearability testing showed that the composites filled by modified MoS2 owned the better wearable performances than the filled not one. From minimum to maximum, the wear mass rates of SA/MoS2/PP/PPS, KH570/MoS2/PP/PPS, PP/PPS were 0.7216, 5.4187 and 7.3198 percent in turns. Scanning electronic microscope (SEM) analysis showed the surface modification could uniformize the modified MoS2 to disperse in the polymeric based composites, and also reflect the abrasion mechanism which the particles and the adhering wear modes could all make the mass loss of the testing samples and they coexisted and could transform each other, the former would produce higher loss rates than the later and their leader status would gradually change from the particles wear to the adhering wear during the course of wearing-resisting tests.

Surface modification of LaFeO3 by Co-Pi electrochemical deposition as an efficient photoanode under visible light

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 26192-26198 ◽  
Author(s):  
Q. Peng ◽  
J. Wang ◽  
Y. W. Wen ◽  
B. Shan ◽  
R. Chen
Keyword(s):  
Surface Modification ◽  
Catalytic Activity ◽  
Visible Light ◽  
Electrochemical Deposition ◽  
Carrier Separation

The PEC performance of LaFeO3 is promoted by Co-Pi coating due to improved surface catalytic activity and enhanced carrier separation.

Ultrathin molybdenum disulfide/carbon nitride nanosheets with abundant active sites for enhanced hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 1766-1773 ◽  
Author(s):  
Xingyue Qian ◽  
Junfei Ding ◽  
Jianli Zhang ◽  
Yue Zhang ◽  
Yining Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Molybdenum Disulfide ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Carbon Nitride ◽  
Carbon Nitride Nanosheets

The molybdenum disulfide/carbon nitride (MoS2/C3N4-3) nanosheets with ultrathin thickness present superior catalytic activity for hydrogen evolution reaction for water splitting.

Catalytic activity of synthesized nanosized molybdenum disulfide for the hydrodesulfurization of dibenzothiophene: Effect of H2S partial pressure

2009 ◽  
Vol 91 (1-2) ◽  
pp. 189-197 ◽  
Author(s):  
Hamdy Farag ◽  
Abdel-Nasser A. El-Hendawy ◽  
Kinya Sakanishi ◽  
Masahiro Kishida ◽  
Isao Mochida
Keyword(s):  
Catalytic Activity ◽  
Partial Pressure ◽  
Molybdenum Disulfide

scholarly journals Inorganic Nanozymes: Prospects for Disease Treatments and Detection Applications

2021 ◽  
Vol 9 ◽  
Author(s):  
Peng Wang ◽  
Dongyu Min ◽  
Guoyou Chen ◽  
Minghui Li ◽  
Liquan Tong ◽  
...  
Keyword(s):  
Surface Modification ◽  
Catalytic Activity ◽  
Metal Oxide ◽  
Noble Metal ◽  
Future Development ◽  
Size Structure ◽  
Tumor Therapy ◽  
High Catalytic Activity ◽  
Structure Surface ◽  
Catalytic Mechanisms

In recent years, with the development of nanomaterials, a slice of nanomaterials has been demonstrated to possess high catalytic activity similar to natural enzymes and counter the dilemmas including easy inactivation and low yield natural of enzymes, which are labeled as nanozymes. The catalytic activity of nanozymes could be easily regulated by size, structure, surface modification and other factors. In comparison with natural enzymes, nanozymes featured with a more stable structure, economical preparation and preservation, diversity of functions and adjustable catalytic activity, thus becoming the potentially ideal substitute for natural enzymes. Generally, the are mainly three types containing metal oxide nanozymes, noble metal nanozymes and carbon-based nanozymes, owing various applications in biomedical, energy and environmental fields. In this review, to summarize the recent representative applications of nanozymes, and potentially explore the scientific problems in this field at the same time, we are going to discuss the catalytic mechanisms of diverse nanozymes, with the emphasis on their applications in the fields of tumor therapy, anti-inflammatory and biosensing, hoping to help and guide the future development of nanozymes.

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