Showing results for: UV/VIS Articles
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Effect of hydroxypropyl cellulose (HPC), polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) on Nd-TiO2/graphene oxide nanocomposite for removal of lead(II) and copper(II) from aquatic media
In order to investigate the effect of hydroxypropyl cellulose (HPC), polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) on adsorbing capacity of nanosorbent Nd-TiO2/GO, Nd-TiO2/HPC/GO, Nd-TiO2/PVP/GO and Nd-TiO2/PEG/GO nanocomposites were synthesized. Studies by Fourier transform infrared spectroscopy confirmed the expected structure and X-ray diffraction results confirmed the formation ...
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Preparation and characterisation of silver doped ZnO nanostructures
ZnO was prepared by hydrothermal method. The result of scanning electron microscopy showed that the materials had nanorod structures. Ag–doped ZnO was prepared by UV–photoreduction respectively. Crystalline phases and optical absorption of the prepared samples were determined by X–ray diffraction, Raman spectrum and UV–visible spectrophotometer. X–ray analyses reveals that Ag doped ZnO ...
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Characterisation of dissolved organic matter in the Lower Kinabatangan River, Sabah, Malaysia
Spatial patterns and trends in the concentration and quality of dissolved organic matter (DOM) are characterised across a tropical agricultural catchment using ultraviolet (UV)-visible absorbance, and fluorescence spectroscopy. Related determination of the environmental isotopes 18O and 2H clarify the dynamics of catchment water movement. Water samples were collected from the Kinabatangan ...
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Glass Cuvette
Glass Cuvette 1mm-350ul Optical Glass Cuvette High Transmittance Science Experiment High Temperature Resistant Acid And Alkal 1mm 350ul-G Description: Precision optical processing technology, the optical error of the transparent surface is less than or equal to 0.3%. The material is completely transparent and has excellent surface properties. It is made of German SCHOTT glass without bubbles or ...
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Effect of W doping level on TiO2 on the photocatalytic degradation of Diuron
In the present study, three compositions of W-doped titania nano-photocatalyst are synthesized via the sol–gel method. The powders obtained were characterized by X-ray diffraction, Raman spectroscopy and UV–visible diffuse reflectance spectroscopy. The photocatalytic performances of the different photocatalysts are tested with respect to the degradation of Diuron in water solutions under ...
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Efficient visible-light photocatalytic degradation of sulfadiazine sodium with hierarchical Bi7O9I3 under solar irradiation
Bi7O9I3, a kind of visible-light-responsive photocatalyst, with hierarchical micro/nano-architecture was successfully synthesized by oil-bath heating method, with ethylene glycol as solvent, and applied to degrade sulfonamide antibiotics. The as-prepared product was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflection spectra and ...
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SCION Compass Chromatography Data System CDS Overview
A Chromatography Data System (CDS) plays a pivotal role in instrument control, data processing, report generation and data archiving. It is essential for Chromatographic Analysis, including high-performance liquid chromatography (HPLC), gas chromatography (GC), ion chromatography (IC), supercritical fluid chromatography (SFC), and capillary electrophoresis (CE), ultra-high performance liquid ...
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Glass and UV-Passing Acrylic Lens in UV Light Applications
Glass and UV-passing acrylic lenses play an important role in ultraviolet (UV) lighting. Both are applied to control the transmission of specific wavelengths from the fixture to the target area. When used for windows, the panels offer protection from harmful UV bands. Below highlights the advantages of the materials and their applications in UV light mitigation. Glass and UV Bands Glass can ...
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In vitro exposure to fullerene C60 influences redox state and lipid peroxidation in brain and gills from Cyprinus carpio (Cyprinidae)
Studies concerning the impact of nanomaterials, especially fullerene (C60), in fresh water environments and their effects on the physiology of aquatic organisms are still scarce and conflicting. We aimed to assess in vitro effects of fullerene in brain and gill homogenates of carp Cyprinus carpio, evaluating redox parameters. A fullerene suspension was prepared by continued stirring under ...
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Electrocatalytic degradation of bromocresol green wastewater on Ti/SnO2-RuO2 electrode
Thermal decomposition method was employed to prepare a Ti/SnO2-RuO2 electrode, on which electrocatalytic degradation of bromocresol green (BCG) was investigated in detail. Scanning electron microscopy, an X-ray diffraction analyzer and an X-ray fluorescence spectrometer were adopted to characterize the morphology, crystal structure and element analysis of the as-prepared Ti/SnO2-RuO2 ...
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Silver nanoparticles embedded three dimensional silicate sol–gel matrix modified electrode for nitrite sensor application
A simple amperometric sensor was fabricated by using silver nanoparticles (Agnps) embedded three dimensional silicate sol–gel (SG) matrix (SG–Agnps). The silver nanoparticles stabilised by SH functionalised 3–D silicate sol–gel network was coated on the glassy carbon electrode and used for the determination of nitrite ion in 0.1 M PBS (pH 7.2). The prepared silver nanoparticles–silicate sol–gel ...
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Inside the Gas Analyser – the Interferometer
Several of OPSIS gas analyser types utilize the DOAS technology to establish the concentration of gases. To do so, we need access to absorption spectra in different wavelength regions. A fairly straight-forward way to record spectra is to use a spectrometer.However, the spectrometer device is generally at its best in ultra-violet (UV) and visible wavelength regions. It can also be used in the ...
By OPSIS AB
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Spectroelectrochemistry: shedding light on the unknown
The combination of two well-known analytical techniques, electrochemistry and spectroscopy, gives rise to spectroelectrochemistry (SEC), an established scientific methodology. This hybrid technology combines the advantages of each technique, offering the best of both worlds [1]. The word «spectroelectrochemistry» is the result of combining these two terms as two pieces of a puzzle ...
By Metrohm AG
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Zeolite modified with copper oxide and iron oxide for lead and arsenic adsorption from aqueous solutions
How to completely remove toxic metals from water is still a serious challenge, and is the mission that faces researchers and scientists today. In this work, zeolite/copper oxide (CuO) and zeolite/iron oxide (Fe3O4) nanocomposites (NCs) were prepared via a co-precipitation method. Several techniques were used for characterization of the prepared NCs including UV-visible, powder X-ray ...
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How to choose your lasers for Raman spectroscopy
In Raman spectroscopy, laser excitation choice is one of the most important considerations. The wavelength chosen will impact Raman intensity, spatial resolution, background fluorescence, acquisition time, and the potential cost of a Raman system. Lasers used in Raman spectroscopy range from the UV into the near-infrared and beyond. Different wavelength regions offer advantages and disadvantages ...
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Decreased UV absorbance as an indicator of micropollutant removal efficiency in wastewater treated with ozone
Ozone transforms various organic compounds that absorb light within the UV and visible spectra. UV absorbance can therefore be used to detect the transformation of chemicals during ozonation. In wastewater, decolourisation can be observed after ozonation. This study investigates the correlation of the UV absorbance difference between the ozonation inlet and outlet and the removal efficiency of ...
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MicroLab Series – Fully Automated Oil Analyzer
Introduction The MicroLab 1 is a fully automated, bench-top analyzer specifically designed for the analysis of oil samples to provide comprehensive analytical and diagnostic results of engine, generator, gearbox, hydraulics, power steering and transmission fluids. The MicroLab was developed to bring oil analysis capability to any company that maintains equipment and seeks to improve their overall ...
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Binding interactions of 1‐naphthol with dissolved organic matter of Lake Biwa and treated sewage wastewater: The role of microbial fulvic acid
The binding interactions of 1‐naphthol with effluent and whole natural dissolved organic matter (DOM) samples were analyzed by using a fluorescence quenching technique. Nonfractionated DOM samples from Lake Biwa (Japan), creek water, treated sewage effluents, and an extracted Lake Biwa fulvic acid (LBFA) standard were used as quenchers and compared at the same 1‐naphthol with DOM organic carbon ...
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Photocatalytic degradation of bisphenol A as an endocrine disruptor in aqueous suspension using Ag-TiO2 catalysts
A novel photocatalyst, titanium dioxide (TiO2) deposited with silver (Ag), was prepared by an ultrasonic-assisted sol–gel method and studied for the photocatalytic degradation of endocrine disrupting chemicals such as bisphenol A (BPA) under UV illumination, in order to determine its photocatalytic properties. A series of Ag-TiO2 catalysts prepared with different Ag dosage were characterised by ...
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Application of Fe-Cu binary oxide nanoparticles for the removal of hexavalent chromium from aqueous solution
The adsorption process has been used as an effective technique for the removal of metal ions from aqueous solutions. Groundwater remediation by nanoparticles has received interest in recent years. In the present study, a binary metal oxide of Fe-Cu was prepared and used for the removal of hexavalent chromium from aqueous solution. Batch experiments were performed to investigate the effects of ...
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