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Removal of methylene blue from aqueous solution using poly(acrylic acid)/SiO2 and functionalized poly(acrylic acid)/SiO2 composite nanofibers
Zulfikar M.A.a, Maulina D.a, Nasir M.b, Handayani N.a, Handajani M.a
a Analytical Chemistry Research Group, Institut Teknologi Bandung, Bandung, 40132, Indonesia
b Indonesian Institute of Sciences, Bandung, 40135, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020 Elsevier B.V.In this study, poly(acrylic acid)/SiO2 (PAA/SiO2) and mercapto-functionalized poly(acrylic acid)/SiO2 (PAA/SiO2/TMPTMS) composite nanofibers were prepared through a sol-gel/electrospinning method to remove methylene blue (MB) from aqueous solution. The optimum conditions of the electrospinning process were achieved at room temperature at an applied voltage of 22 kV, a distance of the needle to the collector of 15 cm, and a flow rate of 0.005 mL/min. The presence of a characteristic peak at 2557.61 cm−1 in the FTIR spectra exhibited that the mercapto group was successfully incorporated into the PAA/SiO2 composite nanofiber. SEM-EDX, TEM, and BET analysis showed that the diameters of PAA/SiO2 and PAA/SiO2/TMPTMS were 382.5 and 246 nm, respectively, with the surface areas of PAA/SiO2 and PAA/SiO2/TMPTMS were 27.67 and 108.54 m2/g, respectively. The batch adsorption results indicated that the maximum MB adsorption capacity of PAA/SiO2 and PAA/SiO2/TMPTMS composite nanofibers was found to be 400 and 437.78 mg/g, respectively, at pH 10 for 120 min of contact time. The adsorption isotherm and kinetics data showed that MB adsorption onto both PAA/SiO2 and PAA/SiO2/TMPTMS composite nanofibers followed the Langmuir adsorption isotherm and was best described by the pseudo-second order kinetic model. Under the experimental conditions, thermodynamic parameter data indicated that the MB adsorption process onto PAA/SiO2 and PAA/SiO2/TMPTMS composite nanofibers was non-spontaneous and endothermic. Their high adsorption capacities and their ability to be reused in multiple cycles support these composite nanofibers to become a promising adsorbent to be developed for removing MB from wastewater.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Adsorption,Composite nanofiber,Electrospinning,Mercapto,Methylene blue[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The author is very grateful to the Institut Teknologi Bandung for the financial support of this research study through the ITB Research Program 2019/2020.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.enmm.2020.100381[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]