High Performance of Multifunctional Cotton Fabrics Modified with TiO2, Fe, Ag-doped TiO2 and Graphene Oxide Nanomaterials towards Antimicrobial and Adsorption Removal of Methylene Blue Dye

doi:10.21203/rs.3.rs-274902/v1

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High Performance of Multifunctional Cotton Fabrics Modified with TiO2, Fe, Ag-doped TiO2 and Graphene Oxide Nanomaterials towards Antimicrobial and Adsorption Removal of Methylene Blue Dye

https://doi.org/10.21203/rs.3.rs-274902/v1

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Multifunctional cotton textile nanocomposites are well developed by the functionalization of cotton with pure TiO₂, Ag-, Fe-doped TiO₂, and graphene oxide nanoparticles via sol-gel and modified Hummer methods. The treated fabrics materials are investigated by XRD, FT-IR, and SEM. The obtained treated fabrics have been used as an adsorbent for the methylene blue dye removal from aqueous solution. The functionalized cotton fabrics are tested for antimicrobial capability towards Escherichia coli, Bacillus cereus, and Candida albicans. All functionalized fabrics have higher antimicrobial activity compared to untreated cotton especially the fabrics containing silver and Fe doped TiO₂. The optimum conditions of the adsorption process are determined via the study of the effect of the initial concentration of dye, pH, and contact time on the removal efficiency. Langmuir, Freundlich, and Tempkin isotherms are applied for the equilibrium adsorption data. GO-Cot and Ag-Ti@GO-Cot samples showed the highest adsorption removal activity. The linear correlation coefficient (R²) showed that the Temkin model well fitted the data of adsorption on the GO-Cot sample. The analysis of experimental data with different kinetic models showed that the pseudo-second-order kinetic model well fitted the adsorption data better than the other kinetic models of pseudo-first-order, Elovich, and the intra-particle diffusion.

General Biochemistry

Nanocomposites

Cotton fabrics

Antimicrobial activity

Dye Removal

Adsorption isotherm

Kinetics

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Table 1: The antimicrobial activity of cotton and coated cotton fabrics.

Samples	Zone of inhibition in mm
Samples	B. cereus	E. coli	C. albicans
Cot	11	-ve	-ve
Ti-Cot	-ve	15	5
Ag-Ti-Cot	23.5	10.5	12.5
Fe-Ti-Cot	15	18	9
Go-Cot	10	9	11
Ti@GO-Cot	11	12	7
Ag-Ti@GO-Cot	23	9.5	13
Fe-Ti@ GO-Cot	18	21	12

Table 2: Langmuir, Freundlich and Temkin isotherm constants for MB dye

adsorption onto GO-Cot samples

Model	Parameters	Adsorbents
Model	Parameters	GO-Cot
Langmuir isotherm model	q_max(mg/g)	3.98
	K_L (L/mg)	9.38
	R²	0.613
	R_L	0.024
Freundlich isotherm model	K_F (mg/g)	1.497
	N	0.357
	1/n	2.8
	R²	0.860
Temkin isotherm model	A_T (L/g)	1.1
	B_T	220.15
	B (kJ/mol)	0.011
	R²	0.947

Table 3: Comparison between the pseudo-first order, pseudo-second order, intra-particle diffusion, second order and Elovich models and their parameters for different samples of cotton.

Models

Pseudo-first-order model

Pseudo-second-order model

Intra-particle diffusion

Second -order model

Elovich model

Adsorbents

Parameters

q_e,exp (mg/g)

q_e,cal (mg/g)

k₁ (L/mg)

R²

q_e,cal (mg/g)

k₂(g/(mg min))

R²

k_dif (mg/(g min^½))

R²

q_e,cal (mg/g)

k₂(g/mg min⁻¹)

R²

β (g/mg)

α (mg/(g min))

R²

Cot

1.053

1.093

0.087

0.96

1.39

0.071

0.97

0.169

0.141

0.97

1.08

0.18

0.925

3.27

0.314

0.939

Cot-Ti

6.97

5.95

0.218

0.938

7.66

0.055

0.98

1.033

2.722

0.827

6.75

0.078

0.966

0.66

8.735

0.892

Ag-Ti-Cot

1.47

1.31

0.704

0.946

1.59

0.969

0.99

0.239

0.817

0.916

1.12

1.061

0.972

4.54

22.942

0.95

Fe-Ti-Cot

0.799

1.011

0.408

0.81

0.95

0.385

0.986

0.186

0.152

0.921

1.068

0.904

0.974

4.94

0.794

0.952

Ti@GO-Cot

0.596

2.69

0.19

0.828

0.64

0.998

0.986

0.114

0.199

0.816

0.461

1.221

0.948

8.2

1.186

0.898

Ag-Ti@GO-Cot

0.996

1.25

0.302

0.947

1.11

0.526

0.995

0.192

0.340

0.943

0.898

0.689

0.974

4.83

2.019

0.969

Fe-Ti@GO-Cot

0.491

0.25

0.346

0.755

0.51

3.185

0.997

0.039

0.347

0.946

0.228

2.768

0.834

24.51

399.276

0.911

GO-Cot

1.416

1.05

0.304

0.967

1.57

0.436

0.996

0.277

0.529

0.956

1.368

0.699

0.931

3.56

3.79

0.981

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High Performance of Multifunctional Cotton Fabrics Modified with TiO2, Fe, Ag-doped TiO2 and Graphene Oxide Nanomaterials towards Antimicrobial and Adsorption Removal of Methylene Blue Dye

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