scholarly journals Lipid-bilayer coated nanosized bimodal mesoporous carbon spheres for controlled release applications

2015 ◽  
Vol 3 (48) ◽  
pp. 9323-9329 ◽  
Author(s):  
Benjamin Mandlmeier ◽  
Stefan Niedermayer ◽  
Alexandra Schmidt ◽  
Jörg Schuster ◽  
Thomas Bein
Keyword(s):  
Controlled Release ◽  
Lipid Bilayer ◽  
Mesoporous Carbon ◽  
High Porosity ◽  
Carbon Spheres ◽  
Facile Synthesis ◽  
On Demand ◽  
Very High

We report the facile synthesis of mesoporous nanosized carbon spheres (MCS) featuring a very high porosity. The MCS are subsequently sealed with an active and biocompatible lipid bilayer making the SLB@MCS suitable for release-on-demand applications.

In situ Stöber templating: facile synthesis of hollow mesoporous carbon spheres from silica–polymer composites for ultra-high level in-cavity adsorption

2016 ◽  
Vol 4 (23) ◽  
pp. 9063-9071 ◽  
Author(s):  
Owen Noonan ◽  
Hongwei Zhang ◽  
Hao Song ◽  
Chun Xu ◽  
Xiaodan Huang ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Mesoporous Carbon ◽  
Carbon Spheres ◽  
Facile Synthesis ◽  
High Level ◽  
Ethylhexyl Phthalate

Anin situStöber templating approach is used to prepare hollow mesoporous carbon spheres demonstrating the in-cavity adsorption of a pollutant di-(2-ethylhexyl)phthalate.

Facile synthesis of uniform yolk–shell structured FeS@mesoporous carbon spheres for high-performance sodium-ion batteries

2019 ◽  
Vol 43 (26) ◽  
pp. 10291-10296 ◽  
Author(s):  
Xiaoning Chen ◽  
Dandong Wang ◽  
Jiangping Chen
Keyword(s):  
Mesoporous Carbon ◽  
High Performance ◽  
Storage Capacity ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Carbon Spheres ◽  
Facile Synthesis ◽  
One Pot ◽  
Coating Method

The uniform yolk–shell structured FeS@meso-C spheres synthesized by a facile one-pot coating method deliver high Na-storage capacity.

Controlled Release of Metformin Hydrochloride I. In vitro Release from Physical Mixture Containing Xanthan Gum as Hydrophilic Rate Retarding Polymer

1970 ◽  
Vol 4 (1) ◽  
Author(s):  
Mashkura Ashrafi ◽  
Jakir Ahmed Chowdhury ◽  
Md Selim Reza
Keyword(s):  
Controlled Release ◽  
Xanthan Gum ◽  
In Vitro Release ◽  
Correlation Coefficients ◽  
High Ratio ◽  
Water Soluble ◽  
Metformin Hydrochloride ◽  
Model Drug ◽  
Very High

Capsules of different formulations were prepared by using a hydrophilic polymer, xanthan gum and a filler Ludipress. Metformin hydrochloride, which is an anti-diabetic agent, was used as a model drug here with the aim to formulate sustained release capsules. In the first 6 formulations, metformin hydrochloride and xanthan gum were used in different ratio. Later, Ludipress was added to the formulations in a percentage of 8% to 41%. The total procedure was carried out by physical mixing of the ingredients and filling in capsule shells of size ‘1’. As metformin hydrochloride is a highly water soluble drug, the dissolution test was done in 250 ml distilled water in a thermal shaker (Memmert) with a shaking speed of 50 rpm at 370C &plusmn 0.50C for 6 hours. After the dissolution, the data were treated with different kinetic models. The results found from the graphs and data show that the formulations follow the Higuchian release pattern as they showed correlation coefficients greater than 0.99 and the sustaining effect of the formulations was very high when the xanthan gum was used in a very high ratio with the drug. It was also investigated that the Ludipress extended the sustaining effect of the formulation to some extent. But after a certain period, Ludipress did not show any significant effect as the pores made by the xanthan gum network were already blocked. It is found here that when the metformin hydrochloride and the xanthan gum ratio was 1:1, showed a high percentage of drug release, i.e. 91.80% of drug was released after 6 hours. But With a xanthan gum and metformin hydrochloride ratio of 6:1, a very slow release of the drug was obtained. Only 66.68% of the drug was released after 6 hours. The percent loading in this case was 14%. Again, when Ludipress was used in high ratio, it was found to retard the release rate more prominently. Key words: Metformin Hydrochloride, Xanthan Gum, Controlled release capsule Dhaka Univ. J. Pharm. Sci. Vol.4(1) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

scholarly journals High Capacity and Fast Kinetics of Potassium-Ion Batteries Boosted by Nitrogen-Doped Mesoporous Carbon Spheres

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jiefeng Zheng ◽  
Yuanji Wu ◽  
Yong Tong ◽  
Xi Liu ◽  
Yingjuan Sun ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Active Sites ◽  
Carbon Materials ◽  
Potassium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Carbon Spheres ◽  
Fast Kinetics ◽  
Nitrogen Doped ◽  
Economic Price

AbstractIn view of rich potassium resources and their working potential, potassium-ion batteries (PIBs) are deemed as next generation rechargeable batteries. Owing to carbon materials with the preponderance of durability and economic price, they are widely employed in PIBs anode materials. Currently, porosity design and heteroatom doping as efficacious improvement strategies have been applied to the structural design of carbon materials to improve their electrochemical performances. Herein, nitrogen-doped mesoporous carbon spheres (MCS) are synthesized by a facile hard template method. The MCS demonstrate larger interlayer spacing in a short range, high specific surface area, abundant mesoporous structures and active sites, enhancing K-ion migration and diffusion. Furthermore, we screen out the pyrolysis temperature of 900 °C and the pore diameter of 7 nm as optimized conditions for MCS to improve performances. In detail, the optimized MCS-7-900 electrode achieves high rate capacity (107.9 mAh g−1 at 5000 mA g−1) and stably brings about 3600 cycles at 1000 mA g−1. According to electrochemical kinetic analysis, the capacitive-controlled effects play dominant roles in total storage mechanism. Additionally, the full-cell equipped MCS-7-900 as anode is successfully constructed to evaluate the practicality of MCS.

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