Cu 2 ZnSnS 4 material has been produced by Pulsed Laser Deposition (PLD) on Soda Lime Glass (SLG) substrates as a function of the number of laser pulses. As the deposition of ablated material has been augmented with increasing number of laser pulses, it has been observed that CZTS-ultrathin lm's thicknesses and particle sizes have been increased, their crystalline structures have been improved.Larger particles limit the transmission of light and cause thin lms to absorb more photons. Therefore, band gaps of CZTS-ultrathin lms have been reduced. CZTS (61 nm) ultrathin lm with the thinnest one among the thin lms produced in this work, which is Cu and S poor but Sn and Zn rich. By increasing the thickness of the lm, it has been observed that the amount of Cu and S were increased, and the ratio of Sn and Zn were decreased. In addition, it has been systematically investigated that the photocatalytic activity of the ultra-thin CZTS lms coated in different thicknesses by PLD method. Among all the photocatalysts, the CZTS (in 242 nm thickness) photocatalyst has exhibited the highest photocatalytic performance, managing to remove 96.1% of methylene blue (MB) in 240 min. Furthermore, the mechanism that performs photocatalysis has been investigated by scavenger experiments, and it was observed that radical ions have an important role in the reaction, while holes have little effect.
In this study, biodegradable piezoelectric poly(3-hydroxybuthyrate) (PHB) and PHB-TiO 2 as well as non-piezoelectric poly(ε-caprolactone) (PCL) fibrous scaffolds were successfully fabricated. First, TiO 2 nanoparticles (NPs) with various content (1%, 2%, and 3% wt) were loaded into the PHB matrix to improve its tensile and wettability properties as well as piezoelectric performances. The piezoelectric property of the fibrous scaffolds was examined and a significant improvement in the piezoelectric property of hybrid fibrous scaffolds compared to pure PHB was detected. For the PHB-2%TiO 2 sample, a maximum of in the range 4.5-5 V electricity production from a height of 10 cm and a mass drop of 35 g was observed after 150 C heat treatment. Then, an in vitro bactericidal analysis was carried out to test the bacteriostatic effect of the produced piezoelectric biomaterials against E-cherichia coli (E coli) under ultrasound treatment. It was observed that E. coli appeared to be the most sensitive to the PHB-%2TiO 2 sample and consequently the antibacterial activity of all the samples against E. coli was dependent on the piezoelectric properties of the samples. The results indicated that the fabricated fibrous scaffolds could be considered as a promising piezoelectric biomaterial with ultrasonicallycontrolled bacteriostatic activity for various tissue engineering applications.
In this study, eco-friendly superhydrophobic (SH) and superoleophilic (SO) poly (3-hydroxybuthyrate) (PHB)-SiO 2 bio-nanofiber membrane has been successfully fabricated for oil-water separation. Firstly, silica nanoparticles (SiNPs) have been synthesized via green laser ablation technique. It was placed into PHB matrix in different contents by controlling the time of ablation and then PHB-SiO 2 nanofibrous mats were obtained on commercial stainless-steel mesh with various mesh
Cu2ZnSnS4 material has been produced by Pulsed Laser Deposition (PLD) on Soda Lime Glass (SLG) substrates as a function of the number of laser pulses. As the deposition of ablated material has been augmented with increasing number of laser pulses, it has been observed that CZTS-ultrathin film’s thicknesses and particle sizes have been increased, their crystalline structures have been improved. Larger particles limit the transmission of light and cause thin films to absorb more photons. Therefore, band gaps of CZTS-ultrathin films have been reduced. CZTS (61 nm) ultrathin film with the thinnest one among the thin films produced in this work, which is Cu and S poor but Sn and Zn rich. By increasing the thickness of the film, it has been observed that the amount of Cu and S were increased, and the ratio of Sn and Zn were decreased. In addition, it has been systematically investigated that the photocatalytic activity of the ultra-thin CZTS films coated in different thicknesses by PLD method. Among all the photocatalysts, the CZTS (in 242 nm thickness) photocatalyst has exhibited the highest photocatalytic performance, managing to remove 96.1% of methylene blue (MB) in 240 min. Furthermore, the mechanism that performs photocatalysis has been investigated by scavenger experiments, and it was observed that radical ions have an important role in the reaction, while holes have little effect.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.