226
scalability [5]. UV-Vis absorption spectroscopy, X-ray diffraction analysis and
TEM microscopy were used to characterized the obtained product. TiO 2 NPs-based
coatings were obtained by means of the doctor blade technique and the inverted dip
coating method, from isopropanol suspensions of TiO 2 NPs, at a concentration of
6,5%, 13% and 26% by weight, respectively. The morphology of the resulting coatings was investigated by SEM analysis and allowed to detect significant differences
between the coatings fabricated by using the two deposition techniques. The difference between the substrates produced by the two techniques is linked to the homogeneity of the film: with doctor blade method appear inhomogeneous with presence
of superficial cracks. On the contrary, more homogeneous coatings, without cracks
were obtained by using the inverted dip coating method. The photocatalytic activity
of the prepared coating was assessed by monitoring the decolouration of a model
target molecule, Methylene Blue (MB), in aqueous solution under UV light irradiation. The inverted dip coating is the most versatile deposition method for real applications. The TiO 2 NPs were then deposited on stainless steel mesh by using
isopropanol suspensions at 6,5% and 13%. TiO 2 NPs content. Also, the films deposited onto the stainless steel meshes were thoroughly investigated by SEM microscopy and by measuring their photoactivity. The experimental results revealed that
the coatings obtained by inverted dip coating method at 13% TiO 2 NPs contents
onto stainless steel mesh result to be the most promising for real applications, due
to photocatalytic performance and the quality of the films.
References
1. Ebele AJ, Abdallah MA-E, Harrad S (2017) Pharmaceuticals and personal care products
(PPCPs) in the freshwater aquatic environment. Emerg Con 3:1–16
2. Truppi A, Petronella F, Placido T, Striccoli M, Agostiano A, Curri ML, Comparelli R
(2017) Visible-light-active TiO 2 -based hybrid nanocatalysts for environmental applications.
Catalysts 7(4):33
3. Petronella F, Truppi A, Dell’Edera M, Agostiano A, Curri ML, Comparelli R (2019) Scalable
synthesis of mesoporous TiO 2 for environmental photocatalytic applications. Materials
12(1853):1–21
4. Petronella F, Diomede S, Fanizza E, Mascolo G, Sibillano T, Agostiano A, Curri ML, Comparelli
R (2013) Photodegradation of nalidixic acid assisted by TiO 2 nanorods/Ag nanoparticles based
catalyst. Chemosphere 91(7):941–947
5. Ancora R, Borsa M, Cassar L (2009)Titanium dioxide based photocatalytic composites and
derived products on a metakaolin support. Google Patents
M. Dell’Edera et al.
scalability [5]. UV-Vis absorption spectroscopy, X-ray diffraction analysis and
TEM microscopy were used to characterized the obtained product. TiO 2 NPs-based
coatings were obtained by means of the doctor blade technique and the inverted dip
coating method, from isopropanol suspensions of TiO 2 NPs, at a concentration of
6,5%, 13% and 26% by weight, respectively. The morphology of the resulting coatings was investigated by SEM analysis and allowed to detect significant differences
between the coatings fabricated by using the two deposition techniques. The difference between the substrates produced by the two techniques is linked to the homogeneity of the film: with doctor blade method appear inhomogeneous with presence
of superficial cracks. On the contrary, more homogeneous coatings, without cracks
were obtained by using the inverted dip coating method. The photocatalytic activity
of the prepared coating was assessed by monitoring the decolouration of a model
target molecule, Methylene Blue (MB), in aqueous solution under UV light irradiation. The inverted dip coating is the most versatile deposition method for real applications. The TiO 2 NPs were then deposited on stainless steel mesh by using
isopropanol suspensions at 6,5% and 13%. TiO 2 NPs content. Also, the films deposited onto the stainless steel meshes were thoroughly investigated by SEM microscopy and by measuring their photoactivity. The experimental results revealed that
the coatings obtained by inverted dip coating method at 13% TiO 2 NPs contents
onto stainless steel mesh result to be the most promising for real applications, due
to photocatalytic performance and the quality of the films.
References
1. Ebele AJ, Abdallah MA-E, Harrad S (2017) Pharmaceuticals and personal care products
(PPCPs) in the freshwater aquatic environment. Emerg Con 3:1–16
2. Truppi A, Petronella F, Placido T, Striccoli M, Agostiano A, Curri ML, Comparelli R
(2017) Visible-light-active TiO 2 -based hybrid nanocatalysts for environmental applications.
Catalysts 7(4):33
3. Petronella F, Truppi A, Dell’Edera M, Agostiano A, Curri ML, Comparelli R (2019) Scalable
synthesis of mesoporous TiO 2 for environmental photocatalytic applications. Materials
12(1853):1–21
4. Petronella F, Diomede S, Fanizza E, Mascolo G, Sibillano T, Agostiano A, Curri ML, Comparelli
R (2013) Photodegradation of nalidixic acid assisted by TiO 2 nanorods/Ag nanoparticles based
catalyst. Chemosphere 91(7):941–947
5. Ancora R, Borsa M, Cassar L (2009)Titanium dioxide based photocatalytic composites and
derived products on a metakaolin support. Google Patents
M. Dell’Edera et al.