Decoration of Ag2WO4 on plate-like MnS for mitigating the charge recombination and tuned bandgap for enhanced white light photocatalysis and antibacterial applications
“…MoS 2 -GO nanocomposites were investigated for their photocatalytic activity in methylene blue (MB) breakdown. The degradation of MB by the MoS 2 -GO nanocomposites revealed increased photocatalytic activity, with a maximum rate of 99% within 60 min of solar light irradiation [ 42 ].…”
In this work, a manganese selenide/graphene oxide (MnSe/GO)-based composite was prepared for wet-chemical assisted method against organic dye; herein, methylene blue (MB) dye removal from the water was employed as a metal selenide-based photocatalyst. The synthesized MnSe/GO composite was systematically characterized by X-ray diffraction (XRD), Fourier transform electron microscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and UV-visible diffuse reflectance spectroscopy (UV-vis. DRS). The structural characteristic revealed the adequate synthesis of the sample with good crystallinity and purity of the obtained products. The morphological analysis indicates the formation of MnSe nanoflakes composed of tiny particles on their surface. At the same time, the GO nanosheets with high aggregation were formed, which may be due to the van der Waals forces. The bond interaction and compositional analysis studies confirmed and supported the structural findings with high purity. The optical analysis showed the bandgap energies of MnSe and their composites MnSe (1.7 eV), 7% GO-MnSe (2.42 eV), 14% GO-MnSe (2.6 eV), 21% GO-MnSe (3.02 eV), and 28% GO-MnSe (3.24 eV) respectively, which increase the bandgap energy after GO and MnSe recombination. Among different contents, the optimized 21% GO-MnSe composite displayed enhanced photocatalytic properties. For instance, a short time of 90 min was taken compared with other concentrations due to the narrow bandgap of MnSe and the highly conductive charge carrier’s support, making the process to remove MB from water faster. These results show that the selenide-based photocatalyst can be an attractive candidate for future advanced photocatalysis applications.
“…MoS 2 -GO nanocomposites were investigated for their photocatalytic activity in methylene blue (MB) breakdown. The degradation of MB by the MoS 2 -GO nanocomposites revealed increased photocatalytic activity, with a maximum rate of 99% within 60 min of solar light irradiation [ 42 ].…”
In this work, a manganese selenide/graphene oxide (MnSe/GO)-based composite was prepared for wet-chemical assisted method against organic dye; herein, methylene blue (MB) dye removal from the water was employed as a metal selenide-based photocatalyst. The synthesized MnSe/GO composite was systematically characterized by X-ray diffraction (XRD), Fourier transform electron microscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and UV-visible diffuse reflectance spectroscopy (UV-vis. DRS). The structural characteristic revealed the adequate synthesis of the sample with good crystallinity and purity of the obtained products. The morphological analysis indicates the formation of MnSe nanoflakes composed of tiny particles on their surface. At the same time, the GO nanosheets with high aggregation were formed, which may be due to the van der Waals forces. The bond interaction and compositional analysis studies confirmed and supported the structural findings with high purity. The optical analysis showed the bandgap energies of MnSe and their composites MnSe (1.7 eV), 7% GO-MnSe (2.42 eV), 14% GO-MnSe (2.6 eV), 21% GO-MnSe (3.02 eV), and 28% GO-MnSe (3.24 eV) respectively, which increase the bandgap energy after GO and MnSe recombination. Among different contents, the optimized 21% GO-MnSe composite displayed enhanced photocatalytic properties. For instance, a short time of 90 min was taken compared with other concentrations due to the narrow bandgap of MnSe and the highly conductive charge carrier’s support, making the process to remove MB from water faster. These results show that the selenide-based photocatalyst can be an attractive candidate for future advanced photocatalysis applications.
“…The percentage of antimicrobial activity at 0.1, 1, 10, 25, and 50 mg/L for MnS on E. coli and B. subtilis are 23%, 41%, 66%, 74%, and 77% and 15%, 22%, 39%, 63%, and 74% respectively. The percentage of antimicrobial activity at 0.1, 1, 10, 25, and 50 mg/L for Ag 2 WO 4 on E. coli and B. subtilis are 35%, 52%, 63%, 79% and 93% and 25%, 42%, 60%, 72%, and 85% respectively 73 . Figure 7 Effect of synthesized nanoparticles on E. coli , Staphylococcus aureus , Enterococcus hira , and Pseudomonas aeruginosa , in different concentrations (the concentrations of 8.5, 10 and, 15 µg/mL are related to Ag nanoparticles and the concentrations of ZnO NPs is 50 µg/mL for all).…”
In this paper, we synthesized Ag/ZnO composite colloidal nanoparticles and the surface of nanoparticles was improved by amodiaquine ligand. The synthesized nanoparticles were characterized using the XRD diffraction pattern, FT-IR Spectroscopy, TEM image, and UV–Vis spectroscopy. The antibacterial, antifungal, and antiviral effects of the synthesized colloid were examined on E.coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Enterococcus hirae bacteria, and Candida Albicans and form spore aspergillus fungi, also influenza, herpes simplex, and covid 19 viruses. The results indicate more than 7 log removal of the bacteria, fungi, and viruses by synthesized colloid with a concentration of 15 μg/L (Ag)/50 µg/ml (ZnO). This removal for covid 19 virus is from 3.2 × 108 numbers to 21 viruses within 30 s. Also, irritation and toxicity tests of the synthesized colloid show harmless effects on human cells and tissues. These colloidal nanoparticles were used as mouthwash solution and their clinical tests were done on 500 people infected by the coronavirus. The results indicate that by washing their mouth and nose three times on day all patients got healthy at different times depending on the depth of the disease. Almost all people with no signs of infection and using this solution as a mouthwash didn’t infect by the virus during the study.
“…Also, 100% of degradation efficiency at 60 min for AgBr/ Ag 2 WO 4 had been reported [185]. Other organics non-azo dyes have also been effectively degraded under visible light such as: MO with g-C 3 N 4 /Ag 2 WO 4 [40,152,154], Ag 2 S/Ag 2 WO 4 [169] and Ag 2 WO 4 /MoS 2 [172]; and MB with Ag 2 WO 4 /VS 4 [173], Ag 2-WO 4 eMnS [176], CoS/Ag 2 WO 4 [175] and AgCl/Ag 2 WO 4 [61]. Similarly, contaminating drugs such as indomethacin in Ag 2 WO 4 /g-C 3 N 4 [156]; para-chlorophenol [40], and ceftriaxone, in AgI/Ag 2 WO 4 [186], among others, underwent photochemical degradation under visible light.…”
Section: Compositementioning
confidence: 99%
“…On the other hand, the synthesis routes assisted by additional energy, SC and hydrothermal, are thermodynamically favorable for the synthesis of the most stable a-Ag 2 WO 4 polymorph. Recently, Sudheer et al developed VS 4 /Ag 2 WO 4 [173], ZnS/Ag 2 WO 4 [174], CoS/Ag 2 WO 4 [175], and MnS/Ag 2 WO 4 [176] composites synthesized through the CP method, and the orthorhombic phase of Ag 2 WO 4 was obtained. These composites presented highly efficient photocatalysis activity for the removal of pollutants (MB degradation) from water and as excellent antimicrobial agents (for E. coli and Bacillus subtilis e B. subtilis).…”
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