Synthesis of ultrafine amorphous PtP nanoparticles and the effect of PtP crystallinity on methanol oxidation

RSC Advances ◽  
2014 ◽  
Vol 4 (40) ◽  
pp. 20722-20728 ◽  
Author(s):  
Yanjiao Ma ◽  
Hui Wang ◽  
Hao Li ◽  
Julian Key ◽  
Shan Ji ◽  
...  
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Carbon Black ◽  
Methanol Oxidation ◽  
Small Particle ◽  
Amorphous Structure ◽  
High Catalytic Activity ◽  
Small Particle Size ◽  
Electrocatalytic Performance ◽  
Different Levels

Ultrafine amorphous PtP nanoparticles supported on carbon black were prepared. Comparison of electrocatalytic performance of the samples with different levels of crystallinity showed ultrafine amorphous PtP nanoparticles have high catalytic activity for methanol oxidation due to their small particle size and amorphous structure.

Accelerated catalytic activity of Pd NPs supported on amine-rich silica hollow nanospheres for quinoline hydrogenation

2017 ◽  
Vol 7 (11) ◽  
pp. 2221-2227 ◽  
Author(s):  
Miao Guo ◽  
Can Li ◽  
Qihua Yang
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Small Particle ◽  
High Surface ◽  
High Catalytic Activity ◽  
Small Particle Size ◽  
Hollow Nanospheres ◽  
Hollow Nanosphere ◽  
Surface Electron ◽  
Solid Catalysts

The ultra-small Pd NPs stabilized by the amine-rich silica hollow nanosphere with a TOF as high as 5052 h−1 are among the most active solid catalysts for quinoline hydrogenation. The high catalytic activity could be mainly attributed to the ultra-small particle size and high surface electron density of Pd NPs.

In situ solution plasma synthesis of mesoporous nanocarbon-supported bimetallic nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29131-29134 ◽  
Author(s):  
Jun Kang ◽  
Nagahiro Saito
Keyword(s):  
Particle Size ◽  
Carbon Black ◽  
Small Particle ◽  
Electrocatalytic Activity ◽  
Bimetallic Nanoparticles ◽  
Synthesis Method ◽  
Simple Synthesis ◽  
Plasma Synthesis ◽  
Small Particle Size

We report a novel in situ simple synthesis method of bimetallic nanoparticles (NPs) supported on carbon black, which can markedly prevent the aggregation of NPs, resulting in a small particle size, good dispersion, and high-electrocatalytic-activity.

Discussion

1929 ◽  
Vol 2 (4) ◽  
pp. 636-637
Author(s):  
C. R. Boggs
Keyword(s):  
Particle Size ◽  
Natural Gas ◽  
Carbon Black ◽  
Small Particle ◽  
Small Particle Size ◽  
Polar Compound ◽  
Dispersing Agent ◽  
Filler Dispersion ◽  
Dispersing Agents

Abstract Doctor Blake has suggested a theory for the mechanism of filler dispersion and reënforcement. However, he deals only with carbon black in rubber. Carbon black is the most important reënforcing ingredient we have for a tire-tread compound. Being a conductor, it cannot be used in appreciable quantities in insulation. We might consider the possibility of finding a non-conducting reënforcing filler for insulation and also what should be done when the present supply of natural gas is depleted. What is needed is a material similar to clay which is cheap and has a small particle size. With present dispersing agents, clay does not, however, reënforce rubber to anywhere near the extent that carbon black does. For a filler to reënforce satisfactorily it must be well dispersed and adhere firmly to the rubber. The correct dispersing agent should bring this about. This agent should be a polar compound. One portion of the molecule should be soluble in the rubber hydrocarbon and another portion should be capable of being adsorbed by and adhering strongly to the surface of the clay.

A cheap and efficient catalyst with ultra-high activity for reduction of 4-nitrophenol

CrystEngComm ◽  
2015 ◽  
Vol 17 (30) ◽  
pp. 5744-5750 ◽  
Author(s):  
Weicheng Pan ◽  
Shenghuan Zhang ◽  
Fei He ◽  
Shili Gai ◽  
Yanbo Sun ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Particle Size ◽  
Catalytic Activity ◽  
Small Particle ◽  
Ni Nanoparticles ◽  
Small Particle Size ◽  
Efficient Catalyst ◽  
Nitrophenol Reduction ◽  
Loading Amount

Ni/SBA-15 catalyst with ultra-small particle size (7 nm), good dispersion, and ultra-high loading amount (57.4%) of Ni nanoparticles was prepared by a unique in situ thermal decomposition and reduction route. It exhibits excellent catalytic activity and stability for 4-nitrophenol reduction.

Dose schedule of Rasa Aushadhis

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Dr. Jambla Neha ◽  
Saroch Vikas ◽  
Johar Smita
Keyword(s):  
Particle Size ◽  
Oral Mucosa ◽  
Small Particle ◽  
Dose Schedule ◽  
The Body ◽  
Small Particle Size ◽  
Inherent Property ◽  
Ayurvedic Drugs ◽  
Modern Era

Rasashastra deals with the Rasa Aushadhis, the drugs of metallic and mineral origin. Mercury is used in most of the Rasaaushadhis. The toxicity of Mineral and metallic preparations are reduced to such an extent by various procedures of Shodhana, Marana etc. that Mercury converts its inherent property of toxicity into medicinal property. Rasa Aushadhis works quickly on the body because due to their small particle size, their absorption starts from the oral mucosa itself. The action of drugs depends largely upon the Anupana i.e. the vehicle for the drug. Rasacharayas have mentioned various Rasa preparations like Bhasmas, Parpati, Pottali, Manduras, Karpooras etc. along with their doses, dose schedule and Anupana / Sahapana etc. The principles of Rasaaushadhis when correlated in modern era are found to be scientifically accurate. We may say that Rasacharyas had already mastered the science of nanotechnology, purification, action of metabolic catalysts, biotransformation and preservation of medicines. The Ayurvedic drugs can be harmful for our body when not administered in proper dosage as per mentioned in classic literatures.

scholarly journals Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1952-1959
Author(s):  
Yi Zhao ◽  
Fangfang Peng ◽  
Yangchuan Ke
Keyword(s):  
Particle Size ◽  
Nonionic Surfactant ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Small Particle ◽  
Amphiphilic Copolymer ◽  
Good Stability ◽  
Small Particle Size ◽  
Oil In Water

Emulsion with small particle size and good stability stabilized by emulsifiers was successfully prepared for EOR application.

Microstructural and Mechanical Characteristics of Porous Irons Produced with Small Particle Size Corn Starch

2019 ◽  
Vol 58 (5-6) ◽  
pp. 278-284
Author(s):  
Mingzhou Su ◽  
Huimeng Wang ◽  
Qiaoling Zhou ◽  
Chang Chen
Keyword(s):  
Particle Size ◽  
Small Particle ◽  
Mechanical Characteristics ◽  
Corn Starch ◽  
Small Particle Size
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