Immobilized TiO2 nanoparticles produced by flame spray for photocatalytic water remediation

Bettini, Luca Giacomo; Diamanti, Maria Vittoria; Sansotera, Maurizio; Pedeferri, MariaPia; Navarrini, W.; Milani, Paolo

doi:10.1007/s11051-016-3551-6

Cited by 13 publications

(7 citation statements)

References 41 publications

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“…For practical disinfection application, researchers have used thermal-sprayed TiO 2 coatings. According to Bettini, an anatase/rutile mixed-phase photocatalyst was reported in the form of nanostructured powders by flame spray pyrolysis (FSP) method (Ref 79 ), which showed photocatalytic activity under sole visible light, indicating the potential of the FSP-made powders as indoor photocatalysts for disinfection purposes. A more practical study by M. Nararom et al was conducted using a thermal-sprayed TiO 2 coating on plates (Ref 80 ).…”

Section: Thermal-sprayed Photocatalytic Coatingsmentioning

confidence: 99%

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

et al. 2020

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There have been ever-growing demands for disinfection of water and air in recent years. Efficient, eco-friendly, and cost-effective methods of disinfection for pathogens are vital to the health of human beings. The photocatalysis route has attracted worldwide attention due to its highly efficient oxidative capabilities and sustainable recycling, which can be used to realize the disinfection purposes without secondary pollution. Though many studies have comprehensively reviewed the work about photocatalytic disinfection, including design and fabrication of photocatalytic coatings, inactivation mechanisms, or practical applications, systematic reviews about the disinfection photocatalysis coatings from fabrication to effort for practical use are still rare. Among different ways of fabricating photocatalytic materials, thermal spray is a versatile surface coating technique and competitive in constructing large-scale functional coatings, which is a most promising way for the future environmental purification, biomedical and life health applications. In this review, we briefly introduced various photocatalytic materials and corresponding inactivation mechanisms for virus, bacteria and fungus. We summarized the thermal-sprayed photocatalysts and their antimicrobial performances. Finally, we discussed the future perspectives of the photocatalytic disinfection coatings for potential applications. This review would shed light on the development and implementation of sustainable disinfection strategies that is applicable for extensive use for controlling pathogens in the near future.

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Section: Thermal-sprayed Photocatalytic Coatingsmentioning

confidence: 99%

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

et al. 2020

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“…Flame spray pyrolysis allows the synthesis of titanium dioxide nanoparticles characterized by high surface area and high thermal stability [28,[49][50][51]. Due to the abundance of oxygen and high temperature in the FSP reactor, the nanoparticles produced by FSP are typically fully oxidized and highly crystalline.…”

Section: -Comparison Between Different Photocatalystsmentioning

confidence: 99%

High Pressure Photoreduction of CO<sub>2</sub>: Effect of Catalyst Formulation, Hole Scavenger Addition and Operating Conditions

Bahadori¹,

Tripodi²,

Villa³

et al. 2018

Preprint

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The photoreduction of CO2 is an intriguing process, which allows the synthesis of fuels and chemicals. One of the limitations for CO2 photoreduction in the liquid phase is its low solubility in water. This point has been here addressed by designing a fully innovative concept of pressurized photoreactor, allowing operation up to 20 bar and applied to improve the productivity of this very challenging process. The photoreduction of CO2 in the liquid phase was performed using commercial TiO2 (Evonink P25), TiO2 obtained by flame spray pyrolysis (FSP) and gold doped P25 (0.2 wt% Au-P25) in the presence of Na2SO3 as hole scavenger (HS). The different reaction parameters (catalyst concentration, pH and amount of HS) have been addressed.The products in liquid phase were formic acid and formaldehyde. Moreover, for longer reaction time and with total consumption of HS, gas phase products formed (H2 and CO) after accumulation of significant amount of organic compounds in the liquid phase, due to their consecutive photoreforming. Enhanced CO2 solubility in water was achieved by adding a base (pH= 12-14).In basic environment, CO2 formed carbonates which further reduced to formaldehyde and formic acid and consequently formed CO/CO2+H2 in the gas phase through photoreforming. The

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“…Besides, TiO 2 is a material of wide interest for clean production and renewable energy. Many methods can be used to produce TiO 2 particles, such as flame aerosol synthesis [53], hydrothermal synthesis [54], and sol-gel synthesis [55]. The main advantage of Flame aerosol synthesis is easily scalable to produce, but shows all the disadvantages of high temperature synthesis.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reactor as a Bridge to Link the Commercialization of Photocatalyst in Water and Air Purification

et al. 2022

Catalysts

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The development of clean and sustainable teleology is vital to treat the critical environmental pollutants. In the last decade, the use of photocatalytic reactors has been widely reported for organic pollutants degradation. From photocatalysis’s application in environmental remediation, the primary technical issue to scientists is always the efficiency. The enhanced photocatalytic efficiency is mainly depended on the materials improvement. However, the design of photoreactors lags behind the development of photocatalysts, which strongly limit the widespread use of photocatalysis technology in environmental remediation. The nanoparticles separation, mass transfer limitation, and photonic efficiency have always been problematic and restrict the high photocatalytic efficiency of photoreactors. To overcome these bottleneck problems, the most popular or newfangled designs of photoreactors employed in air and water treatment has been reviewed. The purpose of this review is to systematize designs and synthesis of innovative TiO2-based photoreactors and provides detailed survey and discussion on the enhanced mechanism of photocatalytic performance in different TiO2-based photoreactors. The most studied photoreactors are the following: packed bed reactor, film reactor and membrane reactor, which have some limitations and advantages. A comprehensive comparison between the different photocatalytic performance of TiO2-based photoreactors is presented. This work aims to summarize the progress of TiO2-based photoreactors and provides useful information for the further research and development of photocatalysis for water and air purification.

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Immobilized TiO2 nanoparticles produced by flame spray for photocatalytic water remediation

Cited by 13 publications

References 41 publications

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review

High Pressure Photoreduction of CO<sub>2</sub>: Effect of Catalyst Formulation, Hole Scavenger Addition and Operating Conditions

Photocatalytic Reactor as a Bridge to Link the Commercialization of Photocatalyst in Water and Air Purification

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