june1

Adviser: Prof.Dr . Suda Kiatkamjornwong Co-adviser: Dr . Wiyong Kangwansupamonkon

PREPARATION OF PHOTOCATALYTIC PREPARATION OF PHOTOCATALYTIC HYDROGEL-METAL OXIDE NANOPARTICLE HYDROGEL-METAL OXIDE NANOPARTICLE

COMPOSITE FOR TEXTILE DYE COMPOSITE FOR TEXTILE DYE DEGRADATIONDEGRADATION

Walasinee Jitbunpot 4972476923

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Wastewater treatmentWastewater treatment

1. Chemical coagulation1. Chemical coagulation

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Aerated lagoon

2. Biological Treatment 2. Biological Treatment


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3. Activated Carbon 3. Activated Carbon


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3. Ozone Treatment 3. Ozone Treatment


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Advantages of TiO2/hydrogel composites

1.1.Superabsorbent polymer is able to absorb waterSuperabsorbent polymer is able to absorb waterhundreds to thousands times of its weight.hundreds to thousands times of its weight.

2.Photocatalyst of TiO2.Photocatalyst of TiO22/hydrogel/hydrogel is able tois able to

degrade textile dyes.degrade textile dyes.

3.This process utilizes cheaply available 3.This process utilizes cheaply available nontoxic materials. nontoxic materials.

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COO-

-OOC

-OOC

COO-

COO

O

H

HO H

H

O H

H

O

H

H

O

H

H

Mechanism for water absorbing of hydrogels

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OrganicOrganicmaterialmaterial

Photocatalysis mechanism of TiO2

e-

h+

e- e-e-e-

h+h+

h+

TiOTiO22

3.2 eV3.2 eV

O2,O3 O2-

HH22OO

HH22OO22 ●●OHOH

HH22OO●●OHOH

COCO22+H+H22OOCOCO22+H+H22OO

Reduction

Oxidation

Conduction band

Valence band

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Applications of Photocatalyst

TiOTiO22

PhotocatalystPhotocatalyst

AirAirPurificationPurification

DeodorizationDeodorizationWaterWater

PurificationPurification

SterilizationSterilization SoilSoilProofProof

NOx , SOx , CO, Formaldehyde and etc...

Garbage odor, Aldehyde, Ammonia, Chloroform, Gasoline, Formaldehyde and e

tc

Oil, Soil, Soot, Self clean,- Anti fogging function and etc. Bacteria, Fungal, Algae, Pest infestation and etc

Organic chloride, Starch, Dyes and etc

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Application of Photocatalyst

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Applications of Photocatalyst

Self-cleaning

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Indoor Applications

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http://www.root-cn.com/Car-Vent-Air-Filter.html


BLACK HOLE - TiO2 MOSQUITO TRAP

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Literature Reviews

Removal of some textile dyes from aqueous solutions Removal of some textile dyes from aqueous solutions by poly(N-vinylby poly(N-vinyl-2--2-pyrrolidone) and pyrrolidone) and

poly(N-vinylpoly(N-vinyl-2--2-pyrrolidone)pyrrolidone)//KK22SS22OO22 hydrogelshydrogels

Gamma irradiator : 24,64, 96, and 124 kGy

Temperature : ambient air

Textile dyes : Cibacron Blue (CB) F3GA, Methyl Orange (MO), Congo Red (CR)

Radiation Physics and Chemistry 68 (2003) 811-818

Hydrogels : Poly(N-vinyl-2-pyrrolidone) and Poly(N-vinyl-2-pyrrolidone)/K2S2O8

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% s

wel

lin

g

t (min) t (min)

% s

wel

lin

g


Photodegradation rate of Photodegradation rate of MO MO solution under me solution under me rcury light radiation rcury light radiation and and sunlight radiation sunlight radiation

Figure 1 photodegradation of MO under a) light radiation and b) sunlight radiation

a b

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Dose (kGy) PVP PVP/K2S2O8

266496124

1264727576515

1498834636588


Swelling eSwelling e quilibrium quilibrium ((%%)) of PVP and of PVP and PVPPVP//KK22

SS22

OO88 hydrogels in M hydrogels in MO O solutions (10 solutions (10 mgmg//11

0000 ml M ml Moo))

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Effect of PVP on the photocatalytic Effect of PVP on the photocatalytic behavior of TiObehavior of TiO22 under sunlight under sunlight

Hydrogels : polyvinylpyrrolidone (PVP)

Textile dyes : methylene red

W. Wang et al. / Materials Letters 57 (2003) 3276-3281

Metal oxide : Titanium dioxide (TiO2)

PVP/TiO2 : 20 wt. % (PT 2030), wt. % (PT 3 0 ) and 40

wt. % (PT40 added during the sol–gel process.

Literature Reviews

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C/C

0

C/C

0

Time (hour) Time (hour)

Photodegradation rate of a methylene red solutio Photodegradation rate of a methylene red solutio n under n under

a mercury light radiation a mercury light radiation and and sunlight radiation sunlight radiation..

Figure 2 photodegradation of Methylene red under a) light radiation and b) sunlight radiation

a b

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Sample T PT20 PT30 PT40

Crystallite size (nm)Rutile ratio (vol.%)

16.780

14.2415.2

12.5917.0

14.3924.5


Crystallite size and rutile mass fraction Crystallite size and rutile mass fraction calculated from XRD calculated from XRD

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Literature Reviews

Synthesis and characterization of acrylamideSynthesis and characterization of acrylamide--acrylic acid hydrogacrylic acid hydrogels and adsorption of some textile dyesels and adsorption of some textile dyes

Hydrogels : acrylamide (PAM) and acrylic acid mole ratios 15/85, 20/30, 30/70

Gamma irradiator : 2.6, 3, 4, 8, 12, 16, 20 kGy

Temperature : ambient air

Textile dyes : Janus Green B (JGB)

Nuclear Instruments and Methods in Physics Research B 151 (1999) 196-199 22

Equilibrium adsorption isotherms and Lang Equilibrium adsorption isotherms and Lang muir muir

plot for adsorption of Janus Green B (JGB) plot for adsorption of Janus Green B (JGB) on poly(AAm/AAc) hydrogels. on poly(AAm/AAc) hydrogels.

Nuclear Instruments and Methods in Physics Research B 151 (1999) 196-199

30/70

20/80

15/85

Figure 3 Equilibrium adsorption isotherms and Langmuir plot

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pHpH effect effect on on polypoly((AAm/AAcAAm/AAc)) hydrogels hydrogels

Nuclear Instruments and Methods in Physics Research B 151 (1999) 196-199

30/70

20/80

15/85

Figure 4 pH effect on poly(Aam/AAc) hydrogels

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Literature Reviews

Removal of methylene blue dye from an aqueous mediRemoval of methylene blue dye from an aqueous media using superabsorbent hydrogel supported a using superabsorbent hydrogel supported

on modified polysaccharideon modified polysaccharide

Hydrogels : Arabic gum is a cheap polysaccharide and was modified with glycicyl methacrylate, sodium acrylate and acrylamide (AGMA-AAm-AAc)

(1.5-0.5-0.5) and (1.0-0.5-0.5)

Textile dyes : Methylene blue

Journal of Colloid and Interface Science 301 (2006) 55-62 25

Water uptake capacity for Water uptake capacity for (1.5-0.5-0.5) (1.5-0.5-0.5) and and(1.0-0.5-0.5)(1.0-0.5-0.5) SH as a function of immersion time SH as a function of immersion time

Journal of Colloid and Interface Science 301 (2006) 55-62

Figure 5 water uptake capacity for SHs as a function of immersion time

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FF ormation of an ionic complex between the imine groups ormation of an ionic complex between the imine groups of MB and the carboxylic groups in of MB and the carboxylic groups in hydrogelshydrogels

Journal of Colloid and Interface Science 301 (2006) 55-62 27

Water uptake response of Water uptake response of(1.5-0.5-0.5)(1.5-0.5-0.5) SH to changes in pH SH to changes in pH

Journal of Colloid and Interface Science 301 (2006) 55-62

pH = 8pH = 8

pH = 2pH = 2

Figure 5 water uptake capacity for (1.5-0.5-0.5) SH as a function of pH

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Preparation and photocatalytic degradabilityPreparation and photocatalytic degradabilityof TiOof TiO22/polyacrylamide composite/polyacrylamide composite

Hydrogels : polyacrylamide (PAM)

Metal oxide : Titanium dioxide (TiO2)

Crosslinker : N,N’-methylenebisacrylamide (MBA)

Initiator : ammonium persulfate (APS)

Temperature : 80 °C

Textile dyes : methyl orange

Q. Tang et al. / European Polymer Journal 43 (2007) 2214-2220

Literature Reviews

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Morphology of the photocatalyst Morphology of the photocatalyst

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Dec

olor

atio

n r

ate

%

TiO2 (relative to the mass of acrylamide, %)

Variation of color removal with Variation of color removal with the amount of TiO the amount of TiO

22 in photocatalyst in photocatalyst

Figure 6 color removal as a function of the amount of TiO2

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1.1.To synthesize poly(acrylamide-To synthesize poly(acrylamide-coco-acrylic acid) -acrylic acid) and study swelling of superabsorbent polymersand study swelling of superabsorbent polymers

2.2.To study efficiency of textile dye To study efficiency of textile dye degradation degradation

with titanium nanoparticles immobilized with titanium nanoparticles immobilized poly(acrylamide-poly(acrylamide-coco-acrylic acid)-acrylic acid) hydrogel hydrogel compositescomposites

Research Objectives

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MBA

TEMED

APS

Purge N2Acrylamide : Acrylic acid

TiO2

Preparation of TiOPreparation of TiO22/poly(acrylamide-/poly(acrylamide-coco-acrylic -acrylic acid) compositesacid) composites

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MBA

TEMED

APS

Purge N2

TiO2

Acrylamide : Acrylic acid

Preparation of TiOPreparation of TiO22/poly(acrylamide-/poly(acrylamide-coco-acrylic acid) -acrylic acid) compositescomposites

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FTIR

NMR

SEM

TEM

XRD

CharacterizationCharacterization

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UV-Vis Spectrophotometry

Direct Blue 71

SO

ONa

S OO

ONa

N N

SO

OONa

OH

NH2SO

O

NaO

N N

Photocatalytic ExperimentsPhotocatalytic Experiments

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UV-Vis Spectrophotometry

Congo Red

NN NN

NH2

SO3Na

NH2

SO3Na

Photocatalytic ExperimentsPhotocatalytic Experiments

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Prosperity from this research

1. To obtain knowledge of synthesis of photocatalytic hydrogen-metal oxide nanoparticle composites2. To obtain knowledge of degradability of dye textiles by photocatalytic process3. To obtain TiO2/poly(AAm-AAc) composites as photocatalyst to degrade dye textiles 4. To apply the synthesized material to degrade dye textiles 5. To recovery and reuse the synthesized material in the next cycle

1. To obtain knowledge of synthesis of photocatalytic hydrogen-metal oxide nanoparticle composites2. To obtain knowledge of degradability of dye textiles by photocatalytic process3. To obtain TiO2/poly(AAm-AAc) composites as photocatalyst to degrade dye textiles 4. To apply the synthesized material to degrade dye textiles 5. To recovery and reuse the synthesized material in the next cycle

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