scholarly journals Enhanced Adsorption of Methylene Blue and Congo Red from Aqueous Solutions by MCM-41/HKUST-1 Composites

2019 ◽  
Vol 31 (8) ◽  
pp. 1675-1682 ◽  
Author(s):  
D.O. Sulistiono ◽  
E. Santoso ◽  
R. Ediati
Keyword(s):  
Methylene Blue ◽  
Mesoporous Silica ◽  
Aqueous Solutions ◽  
Congo Red ◽  
Metal Organic Framework ◽  
Solvent Mixture ◽  
Sem Images ◽  
Enhanced Adsorption ◽  
Xrd Patterns ◽  
Mcm 41

Impregnation of mesoporous silica MCM-41 on metal organic framework type HKUST-1 or often called CuBTC (BTC = 1,3,5-benzenetricarboxylate) has been successfully carried out by solvothermal methods in a solvent mixture of water, ethanol and N,N-dimethylformamide (DMF). The XRD patterns of the obtained solids showed that MCM-41/HKUST-1 composites had the same crystalline phase as pure as HKUST-1. SEM images revealed that the impregnation of the mesoporous silica to HKUST-1 did not alter the surface morphology of the original HKUST-1, which had octahedral shapes. In addition, the thermal stability of the MCM-41/HKUST-1 composites reached 302 °C, increased by 292 °C in comparison to the HKUST-1, even though the impregnation process resulted in a decreased in the specific surface area of the composites. Furthermore, MCM-41/HKUST-1 composites showed outstanding performance as adsorbent of methylene blue and Congo red in aqueous solutions. Results of adsorption studies showed that a pseudo-second order kinetics and Langmuir isotherm were observed for both types of dyes.

Facile synthesis of hierarchical MCM-41 spheres with an ultrahigh surface area and their application for removal of methylene blue from aqueous solutions

2014 ◽  
Vol 6 (5) ◽  
pp. 1397-1403 ◽  
Author(s):  
Qishu Qu ◽  
Zuli Gu
Keyword(s):  
Methylene Blue ◽  
Mesoporous Silica ◽  
Aqueous Solutions ◽  
Surface Area ◽  
Sol Gel ◽  
Silica Spheres ◽  
Facile Synthesis ◽  
Gel Method ◽  
Mesoporous Silica Spheres ◽  
Mcm 41

Hierarchical mesoporous silica spheres were prepared by a simple sol–gel method and used for the removal of methylene blue from aqueous solutions.

Metal-organic framework Uio-66 for adsorption of methylene blue dye from aqueous solutions

2017 ◽  
Vol 14 (9) ◽  
pp. 1959-1968 ◽  
Author(s):  
A. A. Mohammadi ◽  
A. Alinejad ◽  
B. Kamarehie ◽  
S. Javan ◽  
A. Ghaderpoury ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Metal Organic Framework ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Green synthesis of Zr-based metal–organic framework hydrogel composites and their enhanced adsorptive properties

2020 ◽  
Vol 7 (24) ◽  
pp. 4813-4821
Author(s):  
Shirell E. Klein ◽  
Joshua D. Sosa ◽  
Alexander C. Castonguay ◽  
Willmer I. Flores ◽  
Lauren D. Zarzar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Green Chemistry ◽  
Green Synthesis ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Hydrogel Composites ◽  
Enhanced Adsorption ◽  
Adsorptive Properties ◽  
Organic Framework

A Zr-MOF-hydrogel hybrid synthesized using a green chemistry approach exhibited enhanced adsorption for methylene blue compared with the constituent materials.

Photocatalytic Oxidation of Hexanol over Titanium Dioxide Supported on Mesoporous Silica

2015 ◽  
Vol 1112 ◽  
pp. 176-179
Author(s):  
Nur Umisyuhada Mohd Nor ◽  
Hendrik O. Lintang ◽  
Salasiah Endud ◽  
Leny Yuliati
Keyword(s):  
Photocatalytic Activity ◽  
Mesoporous Silica ◽  
Photocatalytic Oxidation ◽  
Sol Gel ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
Diffraction Peaks ◽  
Loading Amount ◽  
Xrd Patterns ◽  
Mcm 41

In order to improve the efficiency of TiO2, material with large surface area such as mesoporous silica is usually used as a support. In this study, the TiO2 was dispersed on mesoporous silica, MCM-41 by an impregnation method, meanwhile the bulk TiO2 was prepared by sol gel method. The X-ray diffraction (XRD) patterns showed that the intensities of diffraction peaks for MCM-41 decreased with the increase of the TiO2 loading, suggesting that the higher loading amount of TiO2 might lead to less ordered structure of MCM-41. The successful addition of TiO2 on MCM-41 was also confirmed from the fluorescence spectra, which the emission intensities of TiO2 and MCM-41 increased and decreased, respectively, with the increase of TiO2 loading on the MCM-41. The activities were compared between the bulk and dispersed TiO2 for photocatalytic oxidation of hexanol. Both bulk and dispersed TiO2 on MCM-41 showed good photocatalytic activity, while the MCM-41 did not show photocatalytic activity. Since the efficiency of photocatalyst can be defined by its respective turnover number (TON), the comparison between bulk and dispersed TiO2 on MCM-41 was made based on their TON values. It was revealed that the dispersed TiO2 on the MCM-41 with 5 wt% of TiO2 loading was the most efficient photocatalyst among all the samples.

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