Research thesis presentation

1. Research Supervisor
Dr. N. Venkatathri
Associate Professor
Department of Chemistry
DSC Members
Prof. K. Laxma Reddy, Dept. of Chemistry
Prof. K. V. Gobi, Dept. of Chemistry
Dr. T. V. Appa Rao, Dept. of Physics
S. Suresh
716192
1

2. Chapter –VII: Summary and Conclusions
Chapter-l: Introduction
Chapter-II: Experimental
Chapter-III: Investigation on the Promoter-Induced Rapid Non-Aqueous
Media Synthesis of SAPO-35 and Methanol-to-Olefin Reaction
Chapter-V: New Porous High Surface Area, TiO2 Anatase/SAPO‐35 Mild
Brønsted Acidic Nanocomposite: Synthesis, Characterization and
Studies on its Enhanced Photocatalytic activity
Chapter–VI: Pd/SAPO-35: Synthesis, Characterization and its Catalytic
application studies on Suzuki-Miyaura Cross Coupling Reaction
Chapter-IV: Synthesis of SAPO molecular sieve in non-aqueous medium by
microwave method using hexamethyleneimine as a template
2

3. 3

4. 4

5. Petro Chemistry
• Heterogeneous Catalysis
• Adsorbents (Purification)
Environmental Protection
• Water decontamination
• Heavy Metal Adsorption
Medicine
• Pharmaceuticals
• Cosmetic Products
Agriculture
• Biofuels
• Carrier for Agrochemicals
Construction
• Concrete Additives
• Water Softening
5

6. 6
* Faujasite (FAU)
* Mazzite (MAZ)
* Levyne (LEV)
* Chabazite (CHA)
* Gismondine (GIS)
* Linde Type L (zeolite L) (LTL)
* Mordenite (MOR)
* Ferrierite (FER)

7. P Source
Solvent
Stirring to form
Homogeneous Solution
Al Source
Template + Si
Source
Stirring to form
Homogeneous Solution
Centrifuged and dried at ambient air
temperature followed by calcination at 550 oC
Crystallization @
high temperature
7

8.  Most of the SAPOs are synthesized in presence of
aqueous media.
 Recently some of these molecular sieves are reported to
synthesis in non-aqueous media.
 Non-aqueous media synthesis is found to be superior in
many aspects, in terms of Si incorporation and
crystallinity.
 However, its limitation is it requires more crystallization
time.
8

9. 9
2. To synthesize Silicoaluminophosphates in very short time through
non-aqueous media using Microwave Irradiation.
1. To synthesize Silicoaluminophosphates (SAPO-35) in lesser time
using Inorganic promoters through non-aqueous media.
3. To synthesize TiO2 anatase supported SAPO-35 for photochemical
reactions.
4. To synthesize Pd/SAPO-35 for Suzuki-Miyaura Coupling Reaction.

10. 10

11.  Hydrothermal Method
 Microwave
 Hydrothermal followed by Sol-Gel
 Hydrothermal followed by
Borohydride Reduction Process
 PXRD
 SEM and EDX
 BET and XPS
 MAS-NMR
 Methanol-to-Olefins Reaction
 Photo Catalysis (MB dye degradation)
 C-C Coupling Reaction (Suzuki-Miyaura Cross coupling Reaction)
 Benzaldehyde Acetalization Reaction
11

12. 12

13.  To Synthesize Levyne (LEV) type microporous SAPO-35 by
hydrothermal method using different inorganic promoters in non-
aqueous media.
 To Characterize the synthesized materials by using various
techniques like PXRD, SEM, BET, XPS and MAS-NMR.
 To Perform the catalytic activity (Methanol-to-Olefins reaction) of
the synthesized materials.
13

14.  SAPO-35 is a Levyne (LEV) type framework crystal structure.
 It is a small pore molecular sieve with 8 member ring pore openings of
0.36x0.48nm
 The structure of SAPO-35 is built by levyne cages, which are connected through
single six rings (S6R) and double six rings (D6R).
 This material is comparatively highly efficient for methanol to olefins reaction.
14

15. Ethylene
Glycol
Allow stirring for
120 min
Al(iOPr)3
Allow stirring for
30 min
Crystallization at 200 oC
about 360 h.
Centrifuged and dried at ambient air
temperature followed by calcination at 550 oC
HEM+SiO2
H3PO4
drop wise
It is more time
What is the solution to
reduce the time
15

16. Ethylene
Glycol
Allow stirring for
120 min
Al(iOPr)3
Allow stirring for
30 min
Crystallization at 200 oC
about 72 h.
Centrifuged and dried at ambient air
temperature followed by calcination at 550 oC
HEM+SiO2
H3PO4
drop wise
Promoter
HClO4-, HF, H3PO4,
and NaNO3
16

17. S. No. Gel composition
Crystallization
conditions
Product
1 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG
360h, 200 oC
hydrothermal
SAPO-35
2 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 HClO4-
72h, 200 oC
hydrothermal
SAPO-35
3 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:1.8 HClO4-
54h, 200 oC
hydrothermal
Semi crystalline
SAPO-35
4 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:1.8 HClO4-
60h, 200 oC
hydrothermal
Semi crystalline
SAPO-35
5 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 HClO4-
48h, 200 oC
hydrothermal
Amorphous
6 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 NaNO3
168h, 200 oC
hydrothermal
SAPO-35
7 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 HF
120h, 200 oC
hydrothermal
SAPO-35
8 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 H3PO4
168h, 200 oC
hydrothermal
SAPO-35
9 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 NH4Cl
168h, 200 oC
hydrothermal
SAPO-35 with
impurity phases
10 Al2O3: 1.8 P2O5:4.9HEM: SiO2: 49EG:0.9-1.3 KOH/NaOH
168h, 200 oC
hydrothermal
Amorphous
17

18.  According to the US Pat. 4,440,871, 1982 we conformed SAPO-35.
PXRD patterns of synthesized SAPO-35 materials
18
 2 theta at 10.9, 13.3, 17.3, 21.9, 26.6, and 31.6 confirmed that Levyne type hexagonal
crystalline material of SAPO-35

19. SEM images of a) 360 h without promoter SAPO-35, in presence of b) HClO4
- c) HF d)
H3PO4 e) NaNO3 promoters and f) SAPO-35 synthesized in aqueous media.
19

20.  The 29Si MAS-NMR, Peaks at -87.14 ppm and -93.22 ppm. According to the
literature, They are assigned to the SiT1(OAl)4 and SiT2(OAl)4 species in the
framework of SAPO-35, respectively.
 The 27Al MAS-NMR, peaks at 41.97 and 13.97 ppm are ascribed to the tetrahedral
Al and the octahedral Al with an Al(OP)4(OH)2 environment
 The 31P MAS-NMR, Peaks at -25.22 and -31.72 ppm with an intensity close to
characteristic of tetrahedral phosphorus P(OAl)4
20
27Al 31P 29Si

21. Material Surface Area
(m2/g)
Pore Volume
(cm3/g)
Pore
Diameter
(nm)
Elemental
composition (mol
%) XPS
Sample-1 (Std.) 449 0.22 1.97 Si0.195Al0.422P0.322
Sample-2 (HClO4
-
)
446 0.22 1.97 Si0.189Al0.461P0.361
Sample-3 (HF) 440 0.22 1.96 Si0.186Al0.468P0.345
Sample-4 (H3PO4) 446 0.22 1.98 Si0.177Al0.466P0.329
Sample-5 NaNO3 461 0.23 2.01 Si0.179Al0.461P0.361
Sample-6 (Aq.
Media)
444 0.22 1.97 Si0.187Al0.484P0.326
21

22. Crystallisation Kinetics of Std. SAPO-35, SAPO-35 in case of HClO4- as promoter, HF as
promoter, H3PO4 as promoter, NaNO3 as promoter and aqueous media SAPO-35.
22
HClO4->HF>H3PO4>NaNO3>without Promoter

23. Angew. Chem. Int. Ed. 2012, 51, 2 – 24
Depiction of the hydrocarbon-pool mechanism as originally proposed by Dahl and Kolboe.
23

24. Selectivity= weight percent of the specific product x100
weight percent of all products
S. No. Sample Selectivity Conversion rate
1 Without Promoter 99 97
2 HClO4
- 97 95.6
3 HF 94 92
4 H3PO4 94 92
5 NaNO3 90 84
6 Aq. SAPO-35 96 87
24
Time on stream = 2 h; catalyst = 1 g; WHSV = 6.5 h-1; N2/ methanol (mole) = 1.5

25.  Levyne type microporous SAPO-35 synthesized through standard
hydrothermal method using inorganic promotors.
 Compared all the characterization techniques data and found to be
similar results.
 MTO reaction results of promoter used samples are similar that of
standard SAPO-35.
25

26. 26

27. 27

28.  To Synthesize silicoaluminophosphates using Microwave method.
 To Characterize the synthesized materials by using various
techniques like XRD, TEM, NH3-TPD, & MAS-NMR.
 To Perform the catalytic activity of the synthesized materials on
benzaldehyde acetalization.
28

29. Ethylene
Glycol
Allow stirring for 30 min
Al(iOPr)3
H3PO4 drop wise
HEM+SiO2
Allow stirring for 30 min/8h
Centrifuged, allowed to dry at 100 oC & a part
of the sample is calcined at 550 oC.
Treated with
microwave irradiation (@450 W)
29
N-SAPO-16-WA
N-SAPO-16-A

30. S.
No.
Gel composition Crystallization conditions Product
1. Al2O3: 1.8 P2O5:4.9HEM: 55H2O
(Al source : Aluminium isopropoxide)
5 min, 450 W, WA microwave
treated.
Amorphous
2. Al2O3: 1.8 P2O5:4.9HEM: 55H2O
(Al source : catapal B)
5 min, 450 W, without aging,
microwave treated.
Amorphous
3. Al2O3: 1.8 P2O5:4.9 HEM: 49 EG (Aluminium source : Aluminium
isopropoxide)
15 days, 200 oC, hydrothermal AlPO4-5
4. Al2O3 : P2O5 : 1.16 HEM : 45 H2O (Aluminium source : Catapal-B) 24 h, 200 oC, hydrothermal AlPO4-5
5. Al2O3: P2O5:1.35HEM: 45H2O (Aluminium source : Catapal-B) 24 h, 200 oC, hydrothermal AlPO4-16
6. Al2O3 : P2O5 : 1.16 HEM : 45 H2O
(Aluminium source : Aluminium isopropoxide)
24 h, 200 oC, hydrothermal AlPO4-16
7. Al2O3: P2O5: 0.3 SiO2 : 1.16 HEM: 45H2O (Aluminium source :
Catapal-B)
24 h, 200 oC, hydrothermal SAPO-5
8. Al2O3: 1.8 P2O5: 1.2 SiO2:4.9HEM: 20-60 H2O: 49EG
(Aluminium source : Aluminium isopropoxide)
5 min, 450 W, without aging,
microwave treated.
Nano crystalline
SAPO-16
N-SAPO-16-WA
9. Al2O3: 1.8 P2O5: 0.3-1.2 SiO2:4.9HEM: 49EG
(Aluminium source : Aluminium isopropoxide)
5 min, 450 W, without aging,
microwave treated.
Nano crystalline
SAPO-16
N-SAPO-16-WA
10. Al2O3: 1.8 P2O5: 0.3-1.2 SiO2:4.9HEM: 49EG
(Aluminium source : Aluminium isopropoxide)
5 min, 450 W, 0 to 12 h with
aging, microwave treated.
Nano crystalline
SAPO-16
N-SAPO-16-A
30

31. Fig. 1: Powder XRD of SAPO-16.
According to the U. S. Pat. [ 191, 4,310,440], 1990 we conformed this as SAPO-16.
[Y. Stephen, T. Wilson, Shrub oak; brent M. Lok, New York; edith M. Flanigen.]
31

32. TEM Images of (a) and (b) N-SAPO-16-WA, (c) and (d) calcined N-SAPO-16-WA
 From TEM it shows that the formation of well-defined triangle shape particles.
 The particle size was found to be around 50-100 nm.
32

33.  BET specific surface area of N-SAPO-16-
WA 270 m2/g, N-SAPO-16-A 286 m2/g & H-
SAPO-16 is 339 m2/g.
 It was found that there are one weak
acidic, one medium/ moderate, one strong
and one very strong acidic nature of peaks
33

34. MAS-NMR spectra of, as-synthesized N-SAPO-16-WA samples of (a) 27Al, (b) 29Si and (c) 31P nuclei and calcined N-SAPO-16-
WA sample of (d) 27Al, (e) 29Si and (f) 31P nuclei
 a peak centered at 37.7 ppm (strong) & at -15 ppm (weak) shoulder peak. They are assigned to the Tet-Al
& the Oct-Al with an Al(OP)4(OH2)2.
 a peak at -88.06 ppm arise from Si(OAl)3(OSi) or Si(OAl)2(OSi)2 environment in td co-ord. & a broad peak
resonance at -107.0 ppm to this is related to the presence of connectivity defects (Si-O- or Si-OH groups)
and amorphous Si with Si(OSi)4.
 The 31P, consisted of two peaks centered at -30.16 ppm (strong) and 2.02 ppm (weak). The peak at -
30.16 ppm is clearly indicate P is fully condensed with P(OAl)4 framework, and 2.02 ppm is due to
partially reacted P in the reaction mixture.
34

35. 35

36. N-SAPO-16-WA the conversion to the product is about 80% in 8 h
S. No. Catalyst Time (h) Conversion (%)
1 SAPO-16 1; 24 71; 80
2 Cu3(BTC)2 2; 24 63; 78
3 Fe(BTC) 2; 24 49; 71
4 Al2(BDC)3 24 66
The acetalization of alcohols reaction is widely used in synthetic approaches to protect the
carbonyl group of the various aldehydes and ketones
10 mL of methanol and 0.1 g of calcined catalyst along with 1 g of benzaldehyde were allowed
to react at 80 oC under refluxing condition
36

37. a) Powder X-ray diffraction patterns b & c) SEM Image of 0 cycle and 5th cycle reused N-SAPO-
16-WA catalysts.
37

38.  Successfully synthesized SAPO-16 in a short time with non-
aqueous medium and characterized in detailed.
 Benzaldehyde Acetalization reaction was performed as the catalytic
activity of synthesized material with 80% of conversion.
38

39. 39

40. 40

41.  To Synthesize SAPO-35 through non-aqueous media, anatase TiO2
by hydrothermal method and TiO2/SAPO-35 composites by simple
sol-gel method.
 To Characterize the synthesized materials by using various
techniques like PXRD, SEM-EDAX, Photoluminescence, XPS & MAS-
NMR.
 To perform the catalytic activity of synthesized materials were
tested by MB dye degradation studies.
41

42. Titanium (IV)
iso propoxide
Allow stirring for 24 h
2-propanol
Centrifuge the solid products & dried
@ 80 oC amorphous TiO2 particles
Crystallization at 200 oC
about 24 h
Centrifuged and dried at ambient air temperature
followed by calcination at 400 oC
Acetic Acid
(AcOH)
42

43. S. No. TiO2(%) SAPO-35(%)
1 100 0
2 0 100
3 50 50
4 25 75
5 75 25
TiO2
Allow stirring for 6 h
SAPO-35
Centrifuge the solid products & dried @ 80 oC
anatase TiO2/SAPO-35 composites
Centrifuged and dried at ambient air temperature
followed by calcination at 400 oC
Water
43

44.  According to the JCPDS CAS No 21-1272 we conformed TiO2
 According to the US Pat. 4,440,871, 1982 we conformed SAPO-35.
44
Figure b represents the calibration curve of PXRD patterns of composites, which was established
by plotting the intensity of the major TiO2 peak at 2 theta value of 25.31° of each composite and
the corresponding amount of TiO2 (w/w).

45.  Uniform spherical shape crystalline Nano particles.
 There are no amorphous phase and highly crystalline nature with rhombohedra
crystals in SAPO-35.
 TiO2 Nano particles are deposited on the SAPO-35
 From EDX the elemental weight % on the surface is Al-7.07, Si-0.42, O-48, P-4.0 and
Ti-30.
a) FE-SEM Micrograph of TiO2 SEM of b) SAPO-35 c) TiO2/SAPO-35(1:1) and d) EDX of TiO2/SAPO-35(1:1)
45

46.  The 27Al MAS-NMR, peaks at 41 and 13 ppm are ascribed to the tetrahedral Al and the
octahedral Al with an Al(OP)4(OH)2 environment.
 The 31P MAS-NMR, Peaks at -25 and -31 ppm with an intensity close to characteristic of
tetrahedral phosphorus P(OAl)4
 The 29Si MAS-NMR, Peaks at -87 ppm and -93 ppm. According to the literature, They are
assigned to the SiT1(OAl)4 and SiT2(OAl)4 species in the framework of SAPO-35, respectively.
46

47. From these deconvolution spectras; by comparing the binding energy values with their
corresponding elemental binding Energy values we have found that Ti (IV), Al(III), Si(IV) and
P(V) oxidation states.
a) Survey spectra of TiO2/SAPO-35, b) Deconvolution Spectra of Ti c) Al, d) Si, e) P and f) O
47

48.  SAPO-35 is having surface area 448 m2/g
 TiO2 Surface area is 85 m2/g
 TiO2/SAPO-35 (1:1) mixture surface area is 222 m2/g 48

49. Photocatalytic application a) Comparison of the photocatalytic activities of the SAPO-35, TiO2
and TiO2/SAPO-35 composites b) Kinetic plots of respective compounds c) UV-Visible spectrum
of TiO2/SAPO-35 [1:1] composite and d) Re-usability test of TiO2/SAPO-35 [1:1] composite
Parameters Conditions
Organic Dye MB
Concentration 5 ppm
Vol’ of dye soln 100 mL
Source of Light Sun Light
Amount of Catalyst 50 mg
Duration 25 min
Experimental conditions
49

50. a) Effect of scavengers on photocatalytic degradation of MB under direct sunlight irradiation
b) Photo Luminescence Spectra of .OH trapping of TiO2/SAPO-35 in TA under direct sunlight irradiation
50
holes (h+)= Ammonium oxalate (AO)
Hydroxyl radicals (.OH)= tertiary butyl alcohol (tBu-OH)
super oxide anion radicals (O2
2-)=Benzoquinone (BQ)

51. 51
TiO2 was successfully dispersed on SAPO-35 in order to increase the Methylene
Blue dye degradation under visible light condition. SEM studies revealed that
TiO2 particles are well dispersed on SAPO-35.
The application study revealed the excellent activity of the composite
(TiO2/SAPO-35) for photocatalytic dye degradation due to the synergetic effect
between SAPO-35 and TiO2.

52. 52

53. 53

54.  To Synthesize SAPO-35 through non-aqueous media and Pd/SAPO-
35 composites Borohydride Reduction Process.
 To Characterize the synthesized materials by using various
techniques like PXRD, SEM-EDAX , XPS & MAS-NMR.
 To perform the catalytic activity of the synthesized materials were
tested by Suzuki-Miyaura Coupling Reaction.
54

55. PdCl2
Ultra Sonication SAPO-35
H2O
Ultra Sonication
Stirring >4h
1:70
NaBH4
Centrifuge/dried@100oC
Pd/SAPO-35
55
1 3%
2 5%
3 10%
Vigorous stirring

56.  2 theta at 10.9, 13.3, 17.3, 21.9, 26.6, and
31.6 confirmed that Levyne type hexagonal
crystalline material of SAPO-35
 2 theta value of 39.5 which conforms the Pd
presence in the materials.
 Cyclic Volttammogram of Pd/SAPO-35 in
2mM K₃[Fe(CN)₆]+ 0.5 M KCl at 100 mV s-1
56

57. a) SAPO-35 b) Pd/SAPO-35
57

58. Material name Surface Area (m2/g) Pore volume (cc/g) Pore diameter (nm)
SAPO-35 493 0.90 1.94
Pd-SAPO-35(10%) 211 0.64 1.51 58
From these deconvolution spectras; by comparing the binding energy values with their corresponding
elemental binding Energy values we have found that, Al(III), Si(IV) and P(V) oxidation states.

59. Catalyst R-X Reaction
Conditions
Yield
(%)
Pd/SAPO-35 3% C6H5I 5 min @360 W 92
Pd/SAPO-35 5% C6H5I 5 min @360 W 96
Pd/SAPO-35 10% C6H5I 5 min @360 W 99
Pd/SAPO-35 3% C6H5Br 5 min @360 W 86
Pd/SAPO-35 5% C6H5Br 5 min @360 W 91
Pd/SAPO-35 10% C6H5Br 5 min @360 W 94
Reaction Conditions: 1mM of aryl halide, 20mg of K2CO3 and 10mg of calcined catalyst
without organic solvent in domestic microwave oven at 360 w about 5 min.
59
S. No Catalyst Yield (%)
1 Pd/SAPO-35 99
2 Pd/KIT-6 98
3 Pd/SAPO-31 98
4 Pd(PPh3)4 (m.w)* 98

60. 60

61.  Pd/SAPO-35 material successfully synthesized and characterized
in detail.
 Catalytic application studies were performed for Pd/SAPO-35
material successfully on Suzuki-Miyaura Coupling Reaction.
61

62. 62

63. 63

64. Material SAPO-35 SAPO-16 Pd/SAPO-35 TiO2/SAPO-
35
Method Hydrothermal Microwave Hydrothermal/
Borohydride
Reduction
Process
Hydrotherm
al/ Sol-Gel
Techniques PXRD, SEM,
BET, XPS and
MAS-NMR
PXRD, TEM,
BET, and MAS-
NMR
PXRD, SEM,
BET, XPS and
MAS-NMR
PXRD, SEM,
BET, XPS and
MAS-NMR
Application MTO Acetalization
Reaction
C-C coupling
Reaction
Photo
Catalysis
64

65. 65
1. We have successfully reduced the crystallization time from 360 h to 72 h using
promoters to synthesize SAPO-35.
2. We have successfully reduced the crystallization time from 360 h to 5 min using
microwave irradiation to synthesize SAPO-16.
3. We have got an excellent photo catalytic activity for Methylene Blue dye
degradation under direct sunlight when TiO2/SAPO-35 used as catalyst compared
with TiO2 alone as catalyst.
4. We have successfully synthesized Pd/SAPO-35 material to get an excellent yield
(about 99%) for Suzuki-Miyaura Cross Coupling Reaction.

66. 1. An Investigation on Promoter Induced Rapid Non-Aqueous Media Synthesis of SAPO-35 and MTO reaction.
Siliveri Suresh, Sai Siva Kumar Pinnepalli, Deepak Joshi, Suman Chirra, Srinath Goskula, Sripal Reddy
Gujjula, Nathan A. Oyler, Venkatathri Narayanan. (ACS Omega)
2. Synthesis of SAPO-16 molecular sieve in non-aqueous medium by microwave method using hexamethyleneimine as a
template
S Suresh, IAK Reddy, N Venkatathri (Microporous and Mesoporous Materials)
3. New Porous High Surface Area, TiO2 Anatase/SAPO‐35 Mild Brønsted Acidic Nanocomposite: Synthesis,
Characterization and Studies on its Enhanced Photocatalytic activity (ChemistrySelect)
S Siliveri, S Chirra, C Tyagi, A Gandamalla, AK Adepu, S Goskula, SR Gujjula, N Venkatathri
4. Pd/SAPO-35: Synthesis, Characterization and its Catalytic application studies on Suzuki-Miyaura Cross
Coupling Reaction. (Materials Today: Proceedings)
Suresh Siliveri, Suman Chirra, Srinath Goskula, Sripal Reddy Gujjula, Venkatathri Narayanan
5. Synthesis of new multivalent metal ion functionalized mesoporous silica and studies of their enhanced antimicrobial &
cytotoxicity activities (Journal of Mat. Chemistry B)
S Chirra, S Siliveri, R Gangalla, S Goskula, SR Gujjula, AK Adepu, Rajini Anumula, Siva Sankari Sivasoorian, Li-Fang
Wang, Venkatathri Narayanan.
6. A novel porous Fe3O4/Titanosilicate/g-C3N4 ternary nanocomposites: Synthesis, characterization and their
enhanced photocatalytic activity on Rhodamine B degradation under visible light
AK Adepu, S Goskula, S Chirra, S Siliveri, SR Gujjula, V Narayanan (Journal of Water Process Engineering) 66

67. 7. Rapid synthesis of a novel nano-crystalline mesoporous faujasite type metal-organic framework, ZIF-8 catalyst, and
NaBH4 assisted, enhanced catalytic Rhodamine B degradation (Materials Today Communications)
Suman Chirra, Li-Fang Wang, Himanshu Aggarwal, Ming-Fong Tsai, Siva Sankari Soorian, Siliveri Suresh, Srinath
Goskula, Sripal Reddy Gujjula, N. Venkatathri
8. Synthesis of a high-surface area V2O5/TiO2–SiO2 catalyst and its application in the visible light photocatalytic
degradation of methylene blue (RSC Advances)
AK Adepu, S Siliveri, S Chirra, S Goskula, SR Gujjula, R Anumula, N Venkatathri
9. Titanium aminophosphates: synthesis, characterization and crystal violet dye degradation studies (RSC advances)
R Anumula, AK Adepu, S Chirra, S Siliveri, V Narayanan
10. Experimental investigation of start-up dynamics for various heating effects in batch reactive distillation to produce
methyl acetate (International Journal of Chemical Reactor Engineering)
AK Patan, SK Thamida, S Suranani, S Siliveri, V Narayanan
11. Pd-KIT-6: synthesis of a novel three-dimensional mesoporous catalyst and studies on its enhanced catalytic
applications (Journal of Porous Materials)
S Chirra, S Siliveri, AK Adepu, S Goskula, SR Gujjula, V Narayanan
12. Magnetically separable porous titanosilicate/Fe3O4 hybrid nanocomposites with enhanced photocatalytic
performance under UV light (Journal of Porous Materials)
AK Adepu, S Goskula, S Chirra, S Siliveri, SR Gujjula, N Venkatathri.
67

68. 13. Synthesis of a novel bifunctional mesoporous Ti-SBA-15-SO3H catalyst and studies on their enhanced
performance and kinetic modeling of lactic acid esterification reaction with n-butanol.
S Chirra, Raju, S Siliveri, Naresh Yadav, S Goskula, SR Gujjula, V Narayanan (Materials Today: Proceedings)
14. Titanium aminophosphates as efficient, economical, and recyclable catalysts for the synthesis of
xanthenediones (Synthetic Communications)
A Rajini, C Suman, A Ajay Kumar, S Suresh, N Venkatathri
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69.  “Functional Nanomaterials in industrial & Clinical Applications: Academy- Industry-
Clinical Meet” (14th to 16th July 2020, UCLan, Preston, UK)
“Pd/SAPO-35: Synthesis, Characterization and its Catalytic application studies on Suzuki-
Miyaura Cross Coupling Reaction”.
 International Conference on Materials for the millennium (MATCON-2019), CUSAT,
Kochi, March 14-16th 2019.
“Photocatalytic degradation of methylene blue over TiO2/SAPO-35 heterojunction”.
 7th Asia Pacific Congress on Catalysis, The Hotel Lalith, Mumbai, 17-21st January 2017.
“Microwave-mediated rapid non-aqueous media synthesis of a novel Nano crystalline,
silico-aluminophosphate SAPO-16 catalyst”.
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70.  My Research Supervisor Dr. N. Venkatathri, Associate Professor
 Dr. Vishnu Shanker, Head, Department of Chemistry
 DSC Members Prof. K. Laxma Reddy, Department of Chemistry
Prof. K. V . Gobi, Department of Chemistry
Dr. T. V. Appa Rao, Department of Physics
 The Director, NIT Warangal and The Ministry of Education, Govt. of India
 DST-SERB Gov. of India for financial support.
 Former Heads, Department of Chemistry
 All the Faculty members of the Department of Chemistry
 My Senior, Co & Junior Research Scholars
 Non-Teaching Staff of the Department of Chemistry
 Nathan A. Oyler, Sai Siva Kumar Pinnepalli, University of Missouri-Kansas City, USA
70

71. 71

72. 72

73. 73

74. 74

75. 75