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Spectroscopic Analysis of Organophosphorus Pesticides Using Colorimetric Reactions

光谱学与光谱分析 2016年第9期36卷 3033-3038页

作者： Amit Kumar Sharma Department of Physics College of EngineeringTeerthanker Mahaveer University

The uv-vis and infrared(IR)absorption spectra of organophosphorus(OP)pesticides have been studied.A correlation in spectra was developed to optimize the OP pesticides in the *** spectroscopic(uv-vis and IR)spectrum of OP pesticides like methyl parathion,malathion and parathion has been interpreted in detail.A complete calculation of the normal frequencies and absolute intensities of uv-vis and IR absorption bands are interpreted with the help of corresponding experimental *** the colorimetric reactions,the bands appear at 2 077,1 637,1 455,1 015,655cm^(-1) for malathion;2 081,1 639,1 316,1 015,794,683cm^(-1) for parathion;2 078,1 632,1 032,794cm^(-1) for methyl parathion were used for quantitative or qualitative *** these IR spectra were acquired by averaging 100 scans at a resolution of 4cm^(-1).It is determined experimentally in the region 200~450nm for uv-vis absorption bands and in the region 400~4 000cm^(-1) for IR absorption *** is concluded that the mainly optically active groups(P—OH, C=O,P=O, C—O—C,P—O—C, P=S, —OH)present in pesticides which are responsible in change in significant data for quantitative and qualitative *** various optical properties like wavelength,band energy,wave number,and frequency,also are calculated.

关键词： OP pesticides Optical properties uv-vis spectrophotometer FTIR spectroscopy

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Effect of Substrate Nature on the Structural, Optical and Electrical Properties of In2S3 Thin Films

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Journal of Materials Science and Chemical Engineering 2022年第5期10卷 1-15页

作者： Fethi Aousgi Youssef Trabelsi Aoussaj Sbai Billel Khalfallah Radhouane Chtourou Laboratory of Nanomaterials and Renewable Energy Systems LaNSER Research and Technology Center of Energy Borj-Cedria Science and Technology Park Hammam-Lif Tunisia Physics Department College of Arts and Sciences in Muhail Asir King Khalid University Abha Saudi Arabia Laboratory of Photovoltaic and Semiconductor Materials University of Tunis El Manar ENIT Tunis Tunisia

In this study, In2S3 thin films have been deposited on ITO and fluorine-tinoxide FTO coated glass substrates by single source vacuum thermal evaporation annealed in vacuum a 300°C - 400°C for 1 h. The samples structure was characterized by X-ray diffraction, revealing the quadratic structure of In2S3 and the crystallinity depends on the temperature of annealing and nature of substrate. The various structural parameters, such as, crystalline size, dislocation density, strain and texture coefficient were calculated. The optical properties show that the refractive index dispersion data obeyed the single oscillator of the Wemple-DiDomenico model. By using this model, the dispersion parameters and the high-frequency dielectric constant were determined. The Hall Effect has been studied at room temperature. The Hall voltages, the Hall coefficient (RH) and mobility (μH) have been measured at different magnetic and electric fields. The films show n-type behavior irrespective of temperature and composition.

关键词： In2S3 Vacuum Evaporation Thin Films X-Ray Diffraction uv-vis spectrophotometer Photovoltaic

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