In this work, an Ag2O modified g-C3N4/TiO2 ternary heterogeneous photocatalyst was prepared through simple calcination and efficient hydrothermal synthesis way. The as-prepared composites were ...analyzed by powder XRD, FT-IR, HRSEM with EDX mapping, HRTEM, XPS, UV-Vis DRS and PL spectra respectively. The Ag2O modified g-C3N4/TiO2 photocatalyst displays a narrower bandgap and improved the RhB dye photo-degradation efficiency was reached at ~94.5% for 60 min under visible light exposure. Also, the reaction rate constant (k) of RhB dye and phenolic impurities degradation efficiencies for g-C3N4/TiO2-Ag2O PCs was 5.8 and 4.97 folds higher than that of pristine g-C3N4. Besides, the g-C3N4/TiO2-Ag2O composite PCs sustained superior photo-degradation performance after the five reusability tests, indicating excellent stability and durability. The excellent photocatalytic performance has been attributed to the synergistic heterostructured formation between Ag/Ag2O among g-C3N4/TiO2 composites, which facilitates the interfacial electron separation/transfer, and great visible-light utilization ability. For experimental results, a possible photo-degradation mechanism was also proposed.
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•Ag2O modified g-C3N4/TiO2 photocatalyst was prepared by hydrothermal synthesis way.•g-C3N4/TiO2-Ag2O displayed 5.8 times superior to g-C3N4 degradation efficiency.•g-C3N4/TiO2-Ag2O catalyst ensured superior degradation process after five recycling.•A possible photo-degradation mechanism was also proposed.•Ag2O SPR effect was deposited on the g-C3N4/TiO2 surface plays an electron bridge.
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In this work, strategies for the formation of duplex coatings with enhanced bioactivity, mechanical properties and corrosion resistance have been focused. TiO2 arrays were fabricated ...on Ti alloy were carried out in a single step using suitable electrolyte by anodization method. Here, we have synthesized a novel bioactive material, minerals incorporated Hydroxyapatite (La/Tb-HAP)-chitosan-casein duplex coatings on anodized Ti via electrodeposition method. The fabricated novel composite coatings were characterized by FT-IR, XRD, FESEM and EDAX analyses. Also, the mechanical properties of duplex coatings were scrutinized by Dermitron thickness and microhardness tester. The corrosion resistance of the as-developed duplex coatings was studied by electrochemical techniques using Ringers solution as the electrolyte. In addition, the antibacterial activity, cell viability, live and dead staining were executed to substantiate the biocompatibility of TNT/CS-CA@M-HAP duplex coatings. From the overall summary of this work, it is proved that the resultant CS-CA@M-HAP coatings on TNT exhibit excellent bioactivity and improved corrosion resistance over pure Ti and serve as a potential candidate for orthopedic applications.
Recurrent cancer treatments fail to distinguish between the normal cells and cancer cells and lead to severe systemic toxicity and side effects. The current researchers focus to overcome these ...conventional pharmacological barriers by increasing the selectivity of cancer cell by targeting mechanism. In this study, interpenetrating polymeric network (IPN) of carboxymethyl cellulose (CMC) and egg white (EW), cross-linked with polyethylene glycol (PEG), and polyvinyl alcohol (PVA) loaded with cyclophosphamide (CP) were synthesized by heat coagulation method and coated with folic acid–egg white (FA–EW) conjugate. The prepared IPN–NPs were characterized using FTIR, P-XRD, and FE-SEM. Particle size, polydispersity index and zeta potential were also evaluated. FA–EW/CP IPN–NPs shows high entrapment efficiency of 94 ± 1.52%. The release analysis of CP from FA–EW/CP IPN–NPs showed a pH-responsive behavior with a rapid release at pH 5.0 and 6.0 rather than pH 7.4. Hemocompatibility of drug delivery systems is proved by hemolysis assay. The confocal microscope studies specify the possible uptake of FA–EW/CP IPN–NPs in MCF-7 breast cancer cell lines. The cytotoxicity analysis of MCF-7 cells by fluorescent live/dead cell assay and MTT assay suggest that FA–EW/CP IPN–NPs exhibit higher cytotoxicity compared to free CP and IPN–NPs. The obtained FA–EW/CP IPN–NPs might serve as a potential candidate for targeted breast cancer drug delivery.
The photocatalytic degradation of organic impurities is a promising eco-friendly system for wastewater treatment. Herein, the CuO coupled g-C3N4/TiO2 ternary heterostructure nanocomposites (NCs) were ...effectively synthesized by facile hydrothermal strategy. The powder XRD, FT-IR, HR-TEM, FE-SEM with EDX, high-resolution XPS, UV–Vis DRS, BET and PL spectra analyses confirm the effective construction of g-C3N4/TiO2/CuO heterostructure composite photocatalysts (PCs). The g-C3N4/TiO2/CuO composite PCs displays photocatalytic enhanced performance for rhodamine B (RhB) dye decomposition than to pristine g-C3N4 PCs under simulated sunlight exposure. At optimum photocatalytic test conditions, the RhB dye was degraded (∼90.3%) within 120 min of light irradiation. No noticeable loss of photo-activity appeared after the five-succeeding recycle test. Moreover, the proposed S-scheme charge transfer mechanism based on scavenger's tests, the photocatalytic enhanced performance of optimum g-C3N4/TiO2/CuO composite PCs is ascribed to the synergistic close interfacial contact, wide visible-light fascination, improved charge separation rate and actively inhibited the recombination rates of efficient e−/h+ pairs relatively.
•Ternary g-C3N4/TiO2–CuO composite was prepared by facile hydrothermal strategy.•Enhanced photocatalytic performance of (90.3%) RhB dye degradation in 120 min.•The rate constant of g-C3N4/TiO2–CuO composite was 4.52 folds superior to g-C3N4.•Also, the •O2− and few photo-h+ were played a reactive species in the photoreaction.•No obvious loss of catalytic activity appeared after the five succeeding recycle test.
•g-C3N4 coupling with TiO2 and α-Fe2O3 magnetic nanocomposite was fabricated•Superior degradation of g-C3N4/TiO2/α-Fe2O3 photocatalysts is 95.7% in 50 min•Good efficiency was recognized by synergetic ...interface and Z-scheme charge transfer•Photocatalyst was simply recovered by an applied magnet after the degradation tests
A novel ternary g-C3N4 coupling with TiO2 and α-Fe2O3 composed magnetic nanocomposite was fabricated by facile calcination and hydrothermal process. The chemical, surface and magnetic characterizations of as-obtained g-C3N4/TiO2/α-Fe2O3 magnetic nanocomposite was explored by various analytical systems. The superior degradation efficiency of magnetic g-C3N4/TiO2/α-Fe2O3 ternary nanocomposite is about 95.7% of Rhodamine B (RhB) in 50 min under visible-light exposure. The photocatalytic upgrading performance was recognized to the synergetic interface among TiO2, g-C3N4 and α-Fe2O3, with effective separation of electron/hole (e-/h+) pair’s, increases in the redox species and great visible-light exploitation owing to less bandgap. The scavenging species presented in superoxide (.O2-) radicals and photo-holes (h+) were played a substantial part and hence establish the Z-scheme RhB dye photo-degradation mechanism. The magnetic g-C3N4/TiO2/α-Fe2O3 ternary PCs still maintain the excellent photo-degradation rate (95.7–88.4%) for the RhB dye aqueous solution after five consecutive recycles, which signifies that the great photocatalyst durability, and is more beneficial for wastewater treatment.
A novel g-C
3
N
4
/ZnO-TiO
2
nanocomposite was prepared by facile calcination and hydrothermal assisted route to boost the photocatalytic efficiency of g-C
3
N
4
. The structural, morphology and ...optical properties of as-obtained nanocomposites (NCs) were examined by various physicochemical methods such as XRD, FT-IR, FESEM-EDX, HR-TEM, UV-DRS and PL spectra relatively. The as-obtained g-C
3
N
4
/ZnO-TiO
2
heterojunction NCs displays an optimum efficiency (93.6%) and high photo-degradation rate constant towards the photo-degradation of RhB dye in 75 min under visible-light exposure. Likewise, the synergistic effects on heterostructure strong-coupling interfaces assembly of g-C
3
N
4
and TiO
2
/ZnO NPs, which facilitates the excellent photo-excited charge separation efficiency, suppressing the recombination rate and also widening the visible-light fascination ability. Hence, the resulting in a prolonged lifetime leading to continuous generation of h
+
and
*
OH
−
species which were eventually improved the photo-degradation process. Also, the as-obtained hybrid g-C
3
N
4
/ZnO-TiO
2
photocatalysts (PCs) revealed superior recycling stability. Moreover, a probable photocatalytic reaction mechanism of the novel PCs was also suggested.
Highly efficient recyclable photocatalysts of ternary g-C3N4-ZnO/Cu2O nanocomposite were designed for photo-degradation of RhB dye. The structural, morphological, surface structure and optical ...properties of the as-prepared nanocomposites (NCs) were characterized by XRD, FT-IR, FE-SEM with EDS, HRTEM, XPS, BET, UV–Vis DRS and PL spectra analysis respectively. The photo-degradation efficiencies of RhB dye over the g-C3N4, g-C3N4/ZnO, g-C3N4/Cu2O and g-C3N4-ZnO/Cu2O photocatalysts (PCs) were 36.4%, 53% and 66%, and 91.4% in 100 min under visible-light. The as-obtained g-C3N4-ZnO/Cu2O PCs was remarkably upgraded the photo-degradation efficiency rate than to other samples. Also, the heterojunction formation among the g-C3N4 and ZnO/Cu2O interfaces due to the development of visible-light absorption capability and photo-excited charge separation efficiency which was improved the photocatalytic performance. Besides, the g-C3N4-ZnO/Cu2O PCs exhibit a greater photo-degradation performance after five successive reuses. Hence, the eco-friendly PCs might be widely useful for the application of dye polluted wastewater treatment.
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•g-C3N4/ZnO/Cu2O composite was effectively fabricated by hydrothermal preparation way.•Catalyst exhibits excellent RhB dye degradation due to high visible-light absorption.•Effective charge transfer/separation efficiency and restrain the recombination rate.•The g-C3N4/ZnO/Cu2O catalyst display excellent reusability for practical application.•Photocatalytic mechanism and charge transfer pathway were elucidated systemically.
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