http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/555 Wed, 29 Apr 2026 10:42:59 GMT 2026-04-29T10:42:59Z http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/959 Title: Noble Metal Doped TiO2 Thin Films In The Efficient Removal of Mordant Orange-1: Insights of Degradation Process Authors: Lalhriatpuia, C Abstract: Nanocomposite Ag0(NPs)/TiO2 is synthesized in a facile template method enabling fine particles of reduced Ag evenly distributed within the titania network. The morphological studies of nanocomposite were extensively performed employing SEM/EDX (Scanning Electron Spectroscopy/Energy Dispersive Xray), TEM (Transmission Electron Microscopy) and AFM (Atomic Force Microscopy). The newer insights in the photocatalytic elimination of Mordant Orange-1 (MO1) was obtained using the nanocomposite thin film for various parametric studies utilizing the UV-A and LED illuminations. The kinetics of degradation of MO1 was performed and the rate constant was favoured at lower concentrations of MO1. However, the elimination efficiency of MO1 was favoured with decrease in solution pH. The NPOC results inferred that fairly good extent of MO1 was mineralized using thin film catalyst for both the UV-A and LED illuminations. The minimal effect of several co-ions demonstrated applicability of thin films in the elimination of MO1 and the stability of the thin film has shown the potential applicability of thin film catalyst. Further, mechanism of photocatalytic degradation was demonstrated with the radical scavengers studies and ascertained the reaction pathways. Thu, 02 Sep 2021 00:00:00 GMT http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/959 2021-09-02T00:00:00Z http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/556 Title: Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies Authors: Lalhriatpuia, C Abstract: Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis. Mon, 24 Sep 2018 00:00:00 GMT http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/556 2018-09-24T00:00:00Z