225
© Springer Nature B.V. 2020
G. Sindona et al. (eds.), Toxic Chemical and Biological Agents, NATO Science
for Peace and Security Series A: Chemistry and Biology,
https://doi.org/10.1007/978-94-024-2041-8_16
Chapter 16
Deposition Strategies of Nano-TiO 2
Photocatalyst for Wastewater Applications
Massimo Dell’Edera, Francesca Petronella, Teresa Sibillano, Cinzia Giannini,
Angela Agostiano, Maria Lucia Curri, and Roberto Comparelli
Nowadays the increase of human activities also related to increase of the world
population causes harmful consequences for the environment. In this context, water
resources are gaining increasing attentions due to the occurrence of emerging pollutants including dyes, pharmaceutical and personal care products (PPCP), endocrine disruptors, pathogens; for this type of pollutants traditional methods show
limited performances [1]. Recently the interest of the scientific community has been
focusing on alternative methods as the Advanced Oxidation Processes (AOPs) [2,
3]. Among AOPs, TiO 2 -based photocatalysis has recently emerged as a promising
water treatment. In particular, nanosized TiO 2 demonstrated improved performances
with respect to its bulk counterpart, thanks to its extremely high surface-to-volume
ratio which can greatly increases the density of active sites available for adsorption
and catalysis. In addition, the size-dependent band gap of nanosized semiconductors allows tuning the red-ox potentials to achieve selective photochemical reactions. The immobilization of nano-photocatalyst onto solid surface is the main goal
for real applications [4]. In the present work, we studied two type of deposition
techniques, namely doctor blade method and a purposely developed dip coating
procedure (here referred to as “inverted dip coating”), to coat TiO 2 NPs first on glass
substrates, and successively the more performing method was used to coat on
unconventional substrates stainless steel mesh. To this end, a batch of TiO 2 NPs was
synthesized by suitably modifying a reported approach, specifically selected for its
M. Dell’Edera (*) · A. Agostiano · M. L. Curri
Dipartimento di Chimica, Università degli studi di Bari ‘Aldo Moro’, Bari, Italy
CNR-IPCF, Istituto per i Processi Chimico-Fisici, Bari, Italy
e-mail: m.delledera@ba.ipcf.cnr.it
F. Petronella · R. Comparelli
CNR-IPCF, Istituto per i Processi Chimico-Fisici, Bari, Italy
T. Sibillano · C. Giannini
CNR-IC, Istituto di Cristallografia, Bari, Italy
© Springer Nature B.V. 2020
G. Sindona et al. (eds.), Toxic Chemical and Biological Agents, NATO Science
for Peace and Security Series A: Chemistry and Biology,
https://doi.org/10.1007/978-94-024-2041-8_16
Chapter 16
Deposition Strategies of Nano-TiO 2
Photocatalyst for Wastewater Applications
Massimo Dell’Edera, Francesca Petronella, Teresa Sibillano, Cinzia Giannini,
Angela Agostiano, Maria Lucia Curri, and Roberto Comparelli
Nowadays the increase of human activities also related to increase of the world
population causes harmful consequences for the environment. In this context, water
resources are gaining increasing attentions due to the occurrence of emerging pollutants including dyes, pharmaceutical and personal care products (PPCP), endocrine disruptors, pathogens; for this type of pollutants traditional methods show
limited performances [1]. Recently the interest of the scientific community has been
focusing on alternative methods as the Advanced Oxidation Processes (AOPs) [2,
3]. Among AOPs, TiO 2 -based photocatalysis has recently emerged as a promising
water treatment. In particular, nanosized TiO 2 demonstrated improved performances
with respect to its bulk counterpart, thanks to its extremely high surface-to-volume
ratio which can greatly increases the density of active sites available for adsorption
and catalysis. In addition, the size-dependent band gap of nanosized semiconductors allows tuning the red-ox potentials to achieve selective photochemical reactions. The immobilization of nano-photocatalyst onto solid surface is the main goal
for real applications [4]. In the present work, we studied two type of deposition
techniques, namely doctor blade method and a purposely developed dip coating
procedure (here referred to as “inverted dip coating”), to coat TiO 2 NPs first on glass
substrates, and successively the more performing method was used to coat on
unconventional substrates stainless steel mesh. To this end, a batch of TiO 2 NPs was
synthesized by suitably modifying a reported approach, specifically selected for its
M. Dell’Edera (*) · A. Agostiano · M. L. Curri
Dipartimento di Chimica, Università degli studi di Bari ‘Aldo Moro’, Bari, Italy
CNR-IPCF, Istituto per i Processi Chimico-Fisici, Bari, Italy
e-mail: m.delledera@ba.ipcf.cnr.it
F. Petronella · R. Comparelli
CNR-IPCF, Istituto per i Processi Chimico-Fisici, Bari, Italy
T. Sibillano · C. Giannini
CNR-IC, Istituto di Cristallografia, Bari, Italy