TiO2-SiO2 Nanoparticles with UV-shielding Effect and Reduced Photocatalytic Activity

Bharati Debi Biswas — Tue, 30 Sep 2025 00:00:00 +0000

Here, we present the synthesis of multifunctional nanoparticles with suppressed photocatalytic activity, tremendous photoluminescence, great optical transparency and outstanding UV absorbance. The nanoparticles’ shape is shown by FESEM tests as fibrous linkages that resemble rods and have pores in between. According to the BJH analysis, the measured pore size was 20 nm. Ultraviolet light irradiation tests confirm the highly effective UV screening performance; nevertheless, the nanoparticles’ photocatalytic property was removed. In the whole 200 to 400 nm range, the UV transmittance is comparatively low, demonstrating the sample’s improved UV protection capability. The nanoparticles’ ultralow dimension, 2.49 m2 g-1 was discovered during a nitrogen adsorption/desorption test, which is in line with their phenomenally low photocatalytic capacity.

Synthesis, Characterisation and Biological Assessment of 2,4,6-Trisubstituted 1,3,5-Triazine Derivatives

Mayur L. Chandera, Kinjal J. Sabalpara, Chetana M. Rajyaguru, Jatin J. Upadhyay — Tue, 30 Sep 2025 00:00:00 +0000

2,4,6-trichloro-1,3,5-triazine (Cyanuric Chloride) and 4-(4-aminophenyl)morpholin-3-one were converted into a new series of 2,4,6-trisubstituted 1,3,5-triazine derivatives by a regioselective reaction, which was followed by reflux with substituted thiophenole in the presence of a catalytic amount of triethyl amine. IR, 1H-NMR, mass, and elemental analysis were used to characterise each of the synthesised substances. All the synthesized compounds were tested for their in vitro antimicrobial activity against gram-positive strains, such as Staphylococcus aureus and Bacillus subtilis, as well as gram-negative strains, such as Escherichia coli and Pseudomonas aeruginosa, by using ampicillin, chloramphenicol and tetracycline as standard drugs. In-vitro antifungal activity was tested against three different fungal strains, such as Candida albicans, Aspergillus flavus and Aspergillus niger. Most of the compounds showed moderate to good activity. Among them, compound CML-1F is most active against bacterial species and compound CML-1H exhibited potent antifungal activity.

Journal of Advanced Scientific Research

TiO2-SiO2 Nanoparticles with UV-shielding Effect and Reduced Photocatalytic Activity

Synthesis, Characterisation and Biological Assessment of 2,4,6-Trisubstituted 1,3,5-Triazine Derivatives