Biosynthesis of titanium dioxide nanoparticles for the photodegradation of dyes and removal of bacteria

Thin Films (FTO/BaTiO3/AgNPs) for Enhanced Piezo-Photocatalytic Degradation of Methylene Blue and Ciprofloxacin in Wastewater

“…The highest piezocatalytic degradation percentage of MB was obtained to be 90% at alkaline media (pH). This highest piezocatalytic degradation was due to the electrostatic interaction between cationic MB and the hydroxylated surface of the BTO/AgNPs piezo-thin-film composite. − As seen from zeta potentials in Figure S4, the isoelectric point (EIP) for BTO/AgNPs was obtained at a pH value of 3.5. Above this isoelectric point (pH > 3.5), the surface charge of the BTO/AgNPs composite was negatively charged throughout.…”

Biosynthesis of iron oxide nanoparticles for the degradation of methylene blue dye, sulfisoxazole antibiotic and removal of bacteria from real water

“…Where the rate of the reaction is represented by the ln, C o is the initial concentration, C t is the final concentration, k is the rate of reaction constant and t is reaction time [ 19 ]. According to the plotted results indicated in Figure 7 (e), the rate of the reaction is following the Pseudo first-order kinetic with the kinetics rate equal to k = 0.096 min −1 , thus leading to the fastest rate of reaction conducted at pH 12 than the rest of the pH measurements.…”

“…Also, other studies have noted that because of the positive charge of the metal cation and negative charge of the bacteria, due to the attraction, these materials become equally enticed, which then results in a denaturation of the proteins, resulting in the destruction of the pathogen. The efficiency of nanoparticles against gram positive strains more than gram negative strains though it is not expected it is also not unusual as several studies have reported such a pattern before [19]. Furthermore, it is known that gram negative strains tend to be defiant against several antibodies since their cell wall though thin can be impenetrable.…”

“…Moreover, green synthesis is not time-consuming, does not require several steps and the plants are mostly readily available. The plant extracts have been shown to consists of phytochemicals such as terpenoids, tannis, polyphenols which are rich in hydroxyl and carboxylic groups which normally act as reducing agents for the synthesis of nanoparticles [ 15 , 18 , 19 ]. Several studies have shown that biomedical synthesis of iron oxide nanoparticles have been effectively used in the degradation of pollutants.…”

Optimization and biosynthesis of calcined chicken eggshell doped titanium dioxide photocatalyst based nanoparticles for wastewater treatment

“…In addition to this, in developing country most of the industries discharge wastewater to near around water stream without adequate treatment due to the lack of know-how, low-profit margins, failure to afford investment costs in pollution remediation equipment and technologies, and financial support [6]. Those who have better capital are not willing to install efficient treatment technologies, due to lack of governmental control and weak implementation of environmental policies in the country [7]. Therefore, there is an urgent need towards providing a wastewater treatment option for these industries to allow environmentally friendly disposal of their wastewater that reaches specific effluent quality goals [8].…”