Effects of silver nanoparticles added into polyurea coating on sulfate-reducing bacteria activity and electrochemical properties; an environmental nano-biotechnology investigation

Abstract

In the present work, Ag nanoparticles were added to polyurea coating in order to improve its antibacterial and electrochemical properties in sulfide-reducing bacteria-containing media. To this end, Ag nano-powder was mixed with two component polyuria, and then the antibacterial behavior of the nanocomposite coating was studied in sulfate-reducing bacteria (SRB)-containing medium. The results revealed the inhibitory effects of nanocomposite coating on the formation of SRB biofilms on the samples. Moreover, the SRB population decreased in contact with the Ag nanoparticles-mixed coating over 7 days. Investigation of the growth and activity of the bacteria represented the effective antibacterial properties of Ag nanoparticles in the polyurea matrix. Furthermore, EIS (electrochemical impedance spectroscopy) measurements indicated that the corrosion properties of the nanocomposite coating improved considerably over 7 days. The coating resistance increased 2 times by adding Ag nanoparticles after 1 day and 3.3 times after 7 days. In accordance with the same results, the charge transfer resistance increased 1.5 times and 1.1 times by adding Ag nanoparticles after 1 day and 7 days, respectively. The improvement in the protective properties of the nanocomposite coating are reflected in the increase in both film and charge transfer resistance.

Sulfide-Ion-Responsive Mesoporous Silica/ZIF-8 Nanocapsules to Inhibit Microbiologically Influenced Corrosion

“…The number of active bacteria in 1 mL of solution is calculated at around 1.3 × 10 3 according to the most probable number (MPN) method. 25 The as-prepared solution with SRB is used for the following antibacterial and anticorrosion experiments.…”

“…According to the extinction dilution method, 1 mL of the SRB-contained solution is injected into the test bottle with a sterile syringe, diluted 10 4 times, and then incubated at 33 °C for 7 days. The number of active bacteria in 1 mL of solution is calculated at around 1.3 × 10 3 according to the most probable number (MPN) method . The as-prepared solution with SRB is used for the following antibacterial and anticorrosion experiments.…”

A comprehensive review of the energy efficiency on nano coated fin and tube condenser

“…The results are tested in the occurrence of 1 and 7 days time intervals. The electrochemical properties are increased 1.5 times, corrosive reduction properties are doubled and antibacterial properties are increased 3.3 times within the 7 days time interval (Karimi‐Maleh et al., 2021).…”

Design of Co-Sn bimetallic nanoalloys as electrocatalyst for alkaline methanol oxidation reaction: Exploring the effect of electroactivation process

“…Moreover, another challenge is the engineering of low-cost high-performance electrocatalysts with long-term stability and high tolerance to toxic intermediates [14]. Thanks to the state-of-art developments in nanotechnology specifically synthesis of multifunctional nanomaterials such as metal-based nanocomposites [15][16][17][18], hydrogels/aerogels and their composites [19,20], carbonaceous materials , polymers and their composites [21,22] have been garnered substantial attention thanks to their possible utilization in various application areas such as biomedical [23], environmental applications [24][25][26][27][28], energy [29,30] , sensors [31][32][33][34] as well as catalyst [35][36][37], etc. Hence, benefiting from the advantages of the recent developments in nanomaterial science, it is of great importance to tailor and design noble-metal free electrocatalysts to be utilized in low-cost high-performance DMFCs [38].…”