Pyrene-Functionalized Mesoporous Silica as a Fluorescent Nanosensor for Selective Detection of Hg2+ in Aqueous Solution

2022 ◽  
pp. 128269
Author(s):  
Zhaojuan Wang ◽  
Zhipeng Gao ◽  
Min Qiao ◽  
Junxia Peng ◽  
Liping Ding
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Selective Detection ◽  
Functionalized Mesoporous Silica

scholarly journals Investigating Methylene Blue Removal from Aqueous Solution by Cysteine-Functionalized Mesoporous Silica

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Abeer M. Beagan
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Mesoporous Silica ◽  
Mesoporous Silica Nanoparticles ◽  
Influential Factors ◽  
Functionalized Mesoporous Silica ◽  
Transmission Electron ◽  
Pseudo Second Order ◽  
The Stöber Method

In this study, mesoporous silica nanoparticles (MSNs) were synthesised using the Stober method and functionalised with cysteine (MSN-Cys) for removal of Methylene Blue (MB) from aqueous solution using the batch method. The adsorbent nanoparticles were characterised by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), FTIR, BET, and TGA. Several influential factors on the adsorption of MB onto the surface of MSN-Cys particles were investigated, including pH, initial concentration, and contact time. The adsorption capacity of MB from aqueous solution increased from circa 70 mg/g MSN-Cys in acidic media to circa 140 mg/g MSN-Cys in basic media. Adsorption isotherms and kinetic models of adsorption were used to clarify the adsorption process. The measured adsorption isotherm was fitted with a Freundlich model for all solutions, and the kinetic model was determined to be pseudo-second-order.

Efficient Removal of Cd2+ by the Mesoporous Silica Functionalized by APTES

2013 ◽  
Vol 726-731 ◽  
pp. 2409-2412
Author(s):  
Xiao Feng Cai ◽  
Kang Wei Ji ◽  
Wan Hao Wu ◽  
Jie Hou ◽  
Shi You Hao
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Ph Value ◽  
High Surface ◽  
High Surface Area ◽  
Efficient Removal ◽  
Structure Directing Agent ◽  
Functionalized Mesoporous Silica ◽  
Adsorption Desorption ◽  
Large Pore Size

Amino-functionalized mesoporous silica (AFMS) with high amino loading, high surface area, and large pore size was synthesized using the anionic surfactant N-lauroylsarcosine sodium (Sar-Na) as template and 3-aminopropyltriethoxysilane (APTES) as co-structure directing agent (CSDA). The synthesized AFMS was characterized by N2adsorption-desorption, TEM and elemental analyzer. The results of the removal of Cd2+from aqueous solution showed that the pH value of aqueous solution affected the removal efficiency of Cd2+greatly, and that unary adsorption isotherm of Cd2+on the AFMS was well described by the Sips isotherm model, in which the adsorption capacity was 2.43 mmol/g for Cd2+, much higher than the literature data.

Conjugation-induced fluorescence labelling of mesoporous silica nanoparticles for the sensitive and selective detection of copper ions in aqueous solution

2014 ◽  
Vol 38 (12) ◽  
pp. 6017-6024 ◽  
Author(s):  
Jingjing Cui ◽  
Shangfeng Wang ◽  
Kai Huang ◽  
Yongsheng Li ◽  
Wenru Zhao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Detection Limit ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
High Selectivity ◽  
Copper Ions ◽  
Mesoporous Silica Nanoparticles ◽  
Selective Detection ◽  
Fluorescence Labelling

A newly developed fluorescent “on–off” chemosensor presents high selectivity towards Cu2+ with detection limit as low as 0.28 μM.

Sign in / Sign up

Export Citation Format

Share Document