Technological concepts and future applications of Ag and ...susnano.org/SNO2017/pdf/8a de la...
Transcript of Technological concepts and future applications of Ag and ...susnano.org/SNO2017/pdf/8a de la...
Technological concepts and future applications of Ag and TiO2 anatase nanoparticles
produced by Green methods
Sustainable Nanotechnology Organization Conference
November, 2017
Guadalupe de la Rosa, Víctor M. Escalante-Gómez, María C. García-Castañeda, J. Antonio Reyes-Aguilera, Edgar Vázquez-Núñez, J. Jesús Ibarra-Sánchez
http://www.cnano.fr/spip.php?article8&lang=en“I don't know how to do this on a small
scale in a practical way, but I do know thatcomputing machines are very large; theyfill rooms. Why can't we make them very
small, make them of little wires, littleelements, and by little, I mean little?” R.F.
Nu
mb
er
of
pro
du
cts
Project on Emerging Nanotechnologies http://www.nanotechproject.org/cpi (Tomado el 19 de mayo del 2014)
Ag
and
TiO2 NPs
4
Aplications
Any given method to obtain NPs
– Advantages
– Disadvantages
http://www.cell.com/trends/biotechnology/fulltext/S0167-7799(16)00040-8
Green Chemistry
– If NPs are intended for biomedical
purposes
– No toxic chemicals
– If medicinal plants are used…….
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Using plant
extracts:
DISADVANTAGES:- Available Resouce
throughout the year
- Concentration of metabolites in the plant
- Modification of chemicalstructure of metabolitesduring the process
- Reproducibility
9
Optimization
Reproducibility
Target
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Synthesis and characterization
Surface modification
Applications
Nanoparticles
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1. Ag
1. Biosynthesis optimisation determining the most favorable
conditions: pH, metabolite extractant, precursor
concentration.
2. TiO2
1. Biosynthesis optimisation: pH, Relationship
extractant/TIPO; Water/TIPO, using alfalfa extracts
(isopropanol)
3. Potential applications
Obje
ctiv
es
(NPs)
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Ag NPs
– Plant metabolite extractant
– H2O
– Isopropanol
– Methanol
– pH
– [Ag]
Particle size (nm)
5 10 15 20
Rela
tive F
requency
0
5
10
15
20
25
30
35
9.0 2.6 nm
σP = 0.29
20 nm
20 nm
Particle size (nm)
5 10 15 20 25 30
Rela
tive F
requency
0
10
20
30
40
12.7 5.2 nm
σP = 0.41S05
20 nm
Particle size (nm)
5 10 15 20
Rela
tive F
requency
0
5
10
15
20
25
30
8.9 2.7 nm
σP = 0.31
(c) (d)
S08
20 nm
Particle size (nm)
5 10 15 20 25 30 35
Rela
tive F
requency
0
10
20
30
40
12.1 2.9 nm
σP = 0.24S10
(e)
20 nm
Particle size (nm)
5 10 15 20
Rela
tive F
requency
0
5
10
15
20
25
30
35
8.9 2.5 nm
σP = 0.28
(f)S11
50 nm
Particle size (nm)
10 15 20 25 30 35 40 45
Rela
tive F
requency
0
5
10
15
20
25
24.1 12.0 nm
σP = 0.50S12
(g)
50 nm
Particle size (nm)
5 10 15 20 25 30
Rela
tive F
requency
0
5
10
15
20
25
30
14.9 4.7 nm
σP = 0.32S01
(a)
S02(b)(a) pH = 10, [Ag+] = 5.5 mM
and agua como PMES (S01);
(b) pH = 7, [Ag+] = 5.5 mM y
agua como PMES (S02);
(c) pH = 7, [Ag+] = 5.5 mM e
Isopropanol–Agua como
PMES: (S05);
(d) pH = 7, [Ag+] = 5.5 mM,
and Metanol–Agua como
PMES (S08);
(e) pH = 7, [Ag+] = 10 mM y
agua como PMES (S10);
(f) pH = 7, [Ag+] = 5.5 mM y
agua como PMES (S11);
(g) pH = 7, [Ag+] = 1 mM y
agua como PMES (S12).
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Ag NPs synthesis
TD: Thermal decomposition; S11: H2OS08: MethanolS05: Isopropanol
Preliminary micro XAS/EXAFS
– Mixture AgCl, Ag, Ag2O
– Different proportions
– Reproducibility to be
determined
18
https://ec.europa.eu/jrc/en/science-update/intercomparison-study-silver-nanoparticles-
food-simulants
Ag NPs
–Leather fungi
–Cancer cells
TiO2
– Anatase
– Patents:
– TiCl4
– Ti hydroxide
– PMES, TIPO/H2O
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https://www.nature.com/articles/srep01959
Conditions21
(a) pH: 1, 3, 6(b) IsOH/ TIPO; 1.5:1(c) Extract/ TIPO; 0.1, 0.2, 0.3(d) TIPOReflux
Particle size (nm)
6 7 8 9 10 11 12 13
Rela
tive F
requency
0
5
10
15
20
25
9.2 2.5 nm
σP = 0.27
Particle size (nm)
11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0
Rela
tive F
requency
0
2
4
6
8
10
12
14
16
18
20
13.3 1.9 nm
σP = 0.14
Particle size (nm)
7.0 7.5 8.0 8.5 9.0
Rela
tive F
requency
0
5
10
15
20
25
8.2 1.5 nm
σP = 0.18
Particle size (nm)
8.0 8.5 9.0 9.5 10.0
Rela
tive F
requency
0
5
10
15
20
25
8.9 1.9 nm
σP = 0.21
Particle size (nm)
9.0 9.5 10.0 10.5 11.0 11.5 12.0
Rela
tive F
requency
0
5
10
15
20
25
10.8 1.1 nm
σP = 0.10
Particle size (nm)
6 7 8 9 10 11 12 13
Rela
tive F
requency
0
5
10
15
20
25
30
9.3 2.4 nm
σP = 0.26
Particle size (nm)
6 7 8 9 10 11
Rela
tive F
requency
0
2
4
6
8
10
12
8.1 1.2 nm
σP = 0.15
Particle size (nm)
22 24 26 28 30 32 34 36
Rela
tive F
requency
0
5
10
15
20
25
30
9.4 2.1 nm
σP = 0.22
S35
S10
S34
S02
S14 S25
S33S30
20 30 40 50 60 70 80
0
25
50
75
100
125
150
175
200
u.a
.
2*Theta
20 30 40 50 60 70 80 90
0
25
50
75
100
125
150
175
200A (101)
A (004) A (200) A (105) A (213)
A (116) A (215)
S10
S06
S02
R (101)R (111)
S34
S30
S28
S27
S26
S25
S22
S18
S14
Yield24
1.Removal of colorants in water using NPs de TiO2
2.Tannery effluent treatment
3.Kinetic studies
TiO
2te
st
https://www.google.com/search?tbm=isch&q=tannery+industry&sa=X&ved=0ahUKEwjcreDuxqnXAhUF1WMKHe5
MC6EQhyYIJg#imgrc=KIdYCJmlPlTWfM:
Concentration (mg/L)
NP size (nm)
500 1500
Average SD Average SD
300 97.9967 0.4179 95.2967 0.2701
560 95.7267 1.1091 93.2833 0.6035
WTHT NPs 3.7633 0.6258
% o
range
meth
ylre
moval
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Concentration (mg/L)
NP size (nm)
500 1500
Average SD Average SD
300 97.7300 0.4004 97.7533 0.4315
560 55.4367 1.4981 95.2367 0.1274
Wtht NPs 5.6300 3.2509
% re
movalm
eth
yle
ne
blu
e
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4000 3600 3200 2800 2400 2000 1600 1200 800 400
0
50
100
150
200
250
% T
ran
sm
ita
ncia
Numero de onda (cm-1)
Azul de metileno
TiO2
TiO2 con azul
Teneria
TiO2 con naranja
4000 3600 3200 2800 2400 2000 1600 1200 800 400
0
50
100
150
200
250Befo
reand a
fter
degra
datio
n
1hr12620 .k Cin
étic
a d
e d
egra
dació
n
1hr16820 .k
Methyl orange
Methylene blue
▪ Summary of findings, Ag
▪ Size and size distribution depend on pH, PMES, and initial Ag
concentration
▪ best numbers were obtained when PMES was water, pH 7 (8.9 ± 2.5
nm, σP = 0.28)
▪ Kinetics indicated a complex reaction
▪ NPs contain a mixture of Ag, AgCl, Ag2O 38/61
▪ Summary of findings, TiO2
▪ Size and size distribution depend on pH, H2O/TIPO, Extracts/TIPO
▪ Crystal phase may be controled (mostly, anatase is obtained)
▪ Best conditions to obtain anatase are pH 6, hydrolisis ratio 500, Extract/TIPO
ratio of 0.1
▪ Colorant degradation depends on particle size
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What are we up to?
– Bouganvillea
– Vainillin
– guayacol
32
20 30 40 50 60 70
Inte
nsid
ad (
U.A
)
Ángulo de difracción (2)
TiO2 sol gel
B-agua 06
B-OH06
B-agua 03
B-OH03
20 30 40 50 60 70
Inte
nsid
ad (
U.A
)
Ángulo de difracción (2)
TiO2 sol gel
V-agua 06
V-OH 06
V-agua03
V-OH03
R. Vijayalakshmi and V. Rajendran. Arch.Appl.Sci.Res; 2012, 4(2): 1183-1190
Bouganvillea Vainillin
SEM
VANILLIN
Tannery effluent35
ZHANG Hui;ZHANG Guoliang*;YANG Zhihong;CHEN Jinyuan;NI Lijia; Degradation of Azo Dye Wastewater in a TiO2 Photocatalysis and Membrane
Separation Hybrid System ; Chinese J of Catalysis, 2009
J. Jesús IbarraVíctor EscalanteIturiel Arias
Gustavo CruzHiram Castillo
Ma. Concepción GarcíaEdgar VázquezSusana FigueroaRosalba Fuentes
37
QUESTIONS?
38
0 5 10 15 20 25 30 35
6
9
12
15
18
Data
Model
[Ag
+] (m
mo
l/L
)
Time (min)
99922.0
mol/L1033.7
6.4
2
6.36.36
R
sk
n
Cin
étic
ade re
acció
npara
la b
iosín
tesis
de la
SN
Ps
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40
4000 3600 3200 2800 2400 2000 1600 1200 800
0
20
40
60
80
100
% T
ran
sm
ita
nce
Wave number, (cm-1)
IsOH-Water
MeOH-Water
Water
4000 3600 3200 2800 2400 2000 1600 1200 800
0
20
40
60
80
100Esp
ectro
s de IR
para
los d
istinto
s extra
cto
s
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