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Photocatalytic degradation by titanium dioxide (TiO2) nanoparticles has been studied at textile dyes in water. TiO2 nanoparticles prepared were hand printed on the glass substrate. Textile dye-Rhodamine B added in water is allowed to react with the sample on the glass substrate under UV-VIS illumination for different intervals of time. Effective degradation of hazardous textile dye from aqueous solution by photocatalytic activity of TiO2 nanoparticle was observed. Also, surface features of the screen printed sample were analyzed using Optical Microscopy and morphology by Atomic Force Microscopy (AFM). Degree of dye degraded was characterized by UV-VIS spectroscopy and results showed that the photocatalysis using TiO2 is a good alternative to textile wastewater treatment.

In this letter, we have presented the modeling of field dependent Maxwell-Wagner interfacial capacitance for bilayer Metal-Insulator-Metal (MIM) capacitors. The model was verified with measured capacitance–voltage characteristics of fabricated bilayer Al2O3/TiO2 MIM capacitors. The model reveals the origin of voltage linearity of MIM capacitors at low frequencies (<10 kHz). The proposed model for bilayer/multilayer MIM capacitors is very useful tool to design circuits for mixed signal, analog and digital circuits with low variation of capacitance for change in voltage.