Biomass-derived carbon aerogel for peroxymonosulfate activation to remove tetracycline: Carbonization temperature, oxygen-containing functional group content, and defect degree

2022 ◽  
Vol 177 ◽  
pp. 114437
Author(s):  
Hang Yang ◽  
Zimao Ding ◽  
Yunli Liu ◽  
Shici Zhang ◽  
Yilingyun Zou ◽  
...  
Keyword(s):  
Functional Group ◽  
Carbon Aerogel ◽  
Carbonization Temperature ◽  
Group Content

Controllable preparation and functionally graded programming of carbon aerogel

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jing Yang ◽  
Jie Zhong ◽  
Fang Xie ◽  
Xiaoyang He ◽  
Liwen Du ◽  
...  
Keyword(s):  
Crosslinking Agent ◽  
Carbon Aerogel ◽  
Carbonization Temperature ◽  
Functionally Graded ◽  
Carbon Aerogels ◽  
Synthetic Process ◽  
Content Type ◽  
Initial Concentration ◽  
Adsorption Performance ◽  
Uranium Solution

Purpose The purpose of this work is to controllably synthesize a carbon aerogel with programmable functionally graded performance via a simple and effective strategy. Design/methodology/approach This work uses polyvinyl alcohol (PVA) via the controllable sol-gel, lyophilization, and carbonization approach to achieve a programmable carbon aerogel. This design has the advantages of low raw material and preparation cost, simple and controllable synthetic process and low carbonization temperature. Findings The thermal stability and microstructure of PVA aerogel can be controlled by the crosslinking agent content within a certain range. The crosslinking agent content and the carbonization temperature are the key factors for functionally graded programming of carbon aerogels, including microstructure, oxygen-containing functional groups and adsorption performance. The adsorption ratio and adsorption rate of uranium can be controlled by adjusting initial concentration and pH value of the uranium solution. The 2.5%25 carbon aerogel with carbonization temperature of 350 °C has excellent adsorption performance when the initial concentration of uranium solution is 32 ppm at pH 7.5. Research limitations/implications As a new type of lightweight nano-porous amorphous carbon material, this carbon aerogel has many excellent properties. Originality/value This work presents a simple, low cost and controllable strategy for functionally graded programming of novel carbon aerogel. This carbon aerogel has great potential for application in various fields such as uranium recovery, wastewater treatment, sound absorption and shock absorption.

A cascade strategy towards the direct synthesis of green polyesters with versatile functional groups

2021 ◽  
Author(s):  
Xueting Wan ◽  
Jian Jiang ◽  
Yanyan Tu ◽  
Siyuan Xu ◽  
Jing Li ◽  
...  
Keyword(s):  
Functional Groups ◽  
Functional Group ◽  
Direct Synthesis ◽  
Facile Synthesis ◽  
Biodegradable Polyesters ◽  
Group Content

The cascade coupling of ROP and CP enables the facile synthesis of high functional group content biodegradable polyesters.

scholarly journals Enhanced cytocompatibility and functional group content of poly(l-lysine) dendrimers by grafting with poly(oxazolines)

2016 ◽  
Vol 7 (28) ◽  
pp. 4609-4617 ◽  
Author(s):  
R. M. England ◽  
J. I. Hare ◽  
P. D. Kemmitt ◽  
K. E. Treacher ◽  
M. J. Waring ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Functional Group ◽  
Drug Loading ◽  
Group Content

We report the use of polyoxazolines as materials for modifying the surface of a generation 5 l-lysine dendrimer resulting in a significant improvement in the biocompatibility properties compared to the unmodified dendrimer. The polyoxazoline coatings represent interesting alternatives to polyethylene glycol and can also offer an opportunity for increasing drug loading.

scholarly journals Pengaruh Massa Bio-char Kayu Akasia (Acacia mangium) Dan Waktu Perendaman Bio-char Terhadap Adsorpsi Sebum Buatan

2019 ◽  
Vol 8 (1) ◽  
pp. 37-44
Author(s):  
Aulia Al azizi ◽  
Erdawati Erdawati ◽  
Suhartono Suhartono
Keyword(s):  
Fatty Acids ◽  
Adsorption Isotherm ◽  
Functional Group ◽  
Acacia Mangium ◽  
Hydroxyl Groups ◽  
Ftir Analysis ◽  
Optimum Time ◽  
Group Content ◽  
Made In

Abstrak Pada penelitian ini dibuat adsorben berupa Bio-char dari kayu akasia (Acacia mangium). Bio-char kayu akasia dibuat dengan cara dipirolisis. Sebum buatan dibuat dengan cara mencampurkan bahan-bahan penyusunnya sesuai komposisi berdasarkan literatur, yaitu squalene, asam lemak, trigliserida, ester wax dan kolesterol yang kemudian dilarutkan dengan toluena. Bio-char kemudian direndam ke dalam larutan sebum dengan variasi massa dan waktu. Kandungan gugus fungsi dari Bio-char kayu akasia ditunjukan melalui hasil analisis FTIR bahwa terdapat gugus amina, karboksil dan hidroksil. Hasil penelitian menunjukan bahwa semakin besar massa Bio-char maka akan semakin optimum daya adsorpsinya dengan waktu optimum 20 menit. Adsorpsi sebum buatan oleh Bio-char kayu akasia mengikuti isoterm adsorpsi yang menunjukan bahwa Bio-char kayu akasia bertipe mesopori. Kata kunci: adsorpsi, bio-char, mesopori, sebum Abstract In this research, an adsorbent was made in the form of Bio-char from acacia wood (Acacia mangium). Acacia wood Bio-char is made by pyrolysis. Artificial sebum is made by mixing the ingredients according to the composition based on literature, namely squalene, fatty acids, triglycerides, ester waxes, and cholesterol which are then dissolved with toluene. Bio-char immersed in a sebum solution with variations in mass and time. The functional group content of acacia wood Bio-char is shown through the results of the FTIR analysis that there are amine, carboxyl, and hydroxyl groups. The results showed that the greater mass of Bio-char, it’s more optimum the adsorption power, with the optimum time of 20 minutes. Adsorption of sebum made by acacia wood Bio-char follows the adsorption isotherm which shows that the Bio-char of acacia wood is mesoporous Keywords: adsorption, Bio-char, mesoporous, sebum

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