Relevant bibliographies by topics / DR UV-Vis

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'DR UV-Vis'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "DR UV-Vis"

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Lutsenko, Larisa, Ludmila Oleksenko, German Telbiz, and Victoriia Gerasova. "Catalytic Activity in CO Oxidation of MnOx Supported on Oxide and Zeolite Carriers." French-Ukrainian Journal of Chemistry 3, no. 2 (2015): 54–64. http://dx.doi.org/10.17721/fujcv3i2p54-64.

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Catalytic activity in CO oxidation was investigated for MnOx-containing materials, prepared by impregnation of SiO2, Al2O3 and zeolites (ZSM-5, ERI). The catalysts were characterized by temperature-programmed reduction (TPR) by hydrogen, diffuse-reflectance UV–Vis (DR UV–Vis) and infra-red (IR) spectroscopy of adsorbed CO. Effect of the previous treatment of the MnOx-containing systems on the catalytic performance has been established. Higher catalytic activity in CO oxidation of the materials treated with air as compared with treated with hydrogen can be explained by presences of manganese io
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Bulánek, Roman, Libor Čapek, Michal Setnička, and Pavel Čičmanec. "DR UV–vis Study of the Supported Vanadium Oxide Catalysts." Journal of Physical Chemistry C 115, no. 25 (2011): 12430–38. http://dx.doi.org/10.1021/jp112206c.

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Andas, Jeyashelly, and Fatin Atiqah Md Alyas. "Structural Investigation of Ceria and Copper Modified Silica from Agricultural Biomass." Applied Mechanics and Materials 799-800 (October 2015): 32–36. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.32.

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Monometallic Ce, Cu and bimetallic Ce-Cu was successfully synthesized at room temperature using silica rice husk (RH) via sol-gel route and were characterized through several physicochemical techniques such as N2adsorption-desorption, XRD and DR/UV-Vis analyses. The prepared materials were designated as RH-10Cu, RH-20Ce and RH-10Cu20Ce. High mesoporosity with Type IV characteristics were evidenced for all the materials. The BET surface area registered for RH-10Cu, RH-20Ce and RH-10Cu20Ce were 396.02, 245.54 and 194.87 m2g-1respectively. Well-dispersion of metal species was clearly evidenced fr
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Tiong, Peggy, Hendrik O. Lintang, Salasiah Endud, and Leny Yuliati. "Reduced Graphene Oxide-Mesoporous Carbon Nitride as Photocatalyst for Removal of N-Nitrosopyrrolidine." Advanced Materials Research 1112 (July 2015): 184–87. http://dx.doi.org/10.4028/www.scientific.net/amr.1112.184.

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The fast electron-hole recombination in mesoporous carbon nitride (MCN) photocatalyst has spurred a great interest to improve its efficiency with addition of various modifiers. In the present study, the MCN was modified by reduced graphene oxide (rGO) that was synthesized via a novel photocatalytic reduction method with different ratios of GO to MCN to produce rGO-MCN composites. The synthesized rGO-MCN samples were characterized by X-ray diffractometer (XRD), diffuse reflectance UV-visible (DR UV-Vis), and Fourier transform infrared (FTIR) spectroscopies. It was confirmed that rGO was success
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Bielan, Zuzanna, Agnieszka Sulowska, Szymon Dudziak, Katarzyna Siuzdak, Jacek Ryl, and Anna Zielińska-Jurek. "Defective TiO2 Core-Shell Magnetic Photocatalyst Modified with Plasmonic Nanoparticles for Visible Light-Induced Photocatalytic Activity." Catalysts 10, no. 6 (2020): 672. http://dx.doi.org/10.3390/catal10060672.

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In the presented work, for the first time, the metal-modified defective titanium(IV) oxide nanoparticles with well-defined titanium vacancies, was successfully obtained. Introducing platinum and copper nanoparticles (NPs) as surface modifiers of defective d-TiO2 significantly increased the photocatalytic activity in both UV-Vis and Vis light ranges. Moreover, metal NPs deposition on the magnetic core allowed for the effective separation and reuse of the nanometer-sized photocatalyst from the suspension after the treatment process. The obtained Fe3O4@SiO2/d-TiO2-Pt/Cu photocatalysts were charac
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Mohd Anuar, Nur Izzati, and Jeyashelly Andas. "Synthesis and Characterization of Biomass Supported Ag, Co and Ag-Co Nanoparticles." Materials Science Forum 857 (May 2016): 480–84. http://dx.doi.org/10.4028/www.scientific.net/msf.857.480.

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Silica extracted from rice husk was used as a support to synthesize the monometallic Ag, Co and bimetallic Ag-Co nanoparticles. The nanoparticles were prepared via a sol-gel method by adding glucose as the reducing agent. The prepared nanoparticles were designated as Ag-NP, Co-NP and AgCo-NP. The successful incorporation of Ag/Co onto the silica surface were evidenced by TEM, FT-IR and DR/UV-Vis analysis. The TEM analysis showed the presence of small spherical shape nanoparticles with an average mean size of 3.18-3.57 nm. Through DR/UV-Vis analysis, the presence of Ag+ and cobalt in the oxidat
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Bashiri, Robabeh, Norani Muti Mohamed, Chong Fai Kait, and Suriati Sufian. "Influence of Hydrolysis Rate on Properties of Nanosized TiO2 Synthesized via Sol-Gel Hydrothermal." Advanced Materials Research 1109 (June 2015): 286–90. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.286.

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This paper presents the effect of different H2O: TTIP (Titanium tetraisopropoxide) molar ratios of 8 to 64 during the synthesis using sol-gel associated hydrothermal method on the physical properties. Characterization of all synthesized TiO2 were accomplished by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) and total surface area measurement, transmission electron microscopy analysis (TEM) and diffuse reflectance UV–Vis spectroscopy (DR-UV-Vis). The XRD analysis showed that anatase (101) was the major phase for all photocatalysts as verified by TEM results. The growth of crystallites w
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Fan, Weiqiang, Meng Li, Jinfu Xu, Hongye Bai, Rongxian Zhang, and Chao Chen. "Synthesis and photocatalytic property of porous metal oxides nanowires based on carbon nanofiber template." Functional Materials Letters 08, no. 02 (2015): 1550018. http://dx.doi.org/10.1142/s1793604715500186.

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A series of porous metal oxides nanowires ( Fe 2 O 3, Co 3 O 4, NiO and CuO ) have been successfully synthesized, where commercial carbon nanofibers were used as the template. The obtained samples were systematically characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV–Vis diffuse reflectance (UV–Vis DR) spectra and transmission electron microscope (TEM). According to the photodegradation data, the porous metal oxides nanowires exhibit significantly photocatalytic activity for degrading tetracycline (TC). Furthermore, the porous Fe 2 O 3 nanowires show the best phot
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Rahmawati, Fitria, Rini Wulandari, and Eti Nofaris. "Optical properties and photocatalytic activity of CdS-TiO2/graphite composite." Science and Engineering of Composite Materials 24, no. 2 (2017): 253–60. http://dx.doi.org/10.1515/secm-2015-0162.

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AbstractTiO2 film was applied to graphite substrate through chemical bath deposition (CBD) method with TiCl4 as precursor. CdS was deposited on TiO2/graphite (TiO2/G) by CBD with precursors of CdSO4. A UV-Vis diffuse reflectance (UV-Vis DR) analysis was used to analyze the optical properties and band gap energy. Meanwhile, photocatalytic activity was determined from the quantum yield (QY) value of isopropanol degradation. The X-ray diffraction pattern shows that the TiO2 film contains rutile and anatase phases. UV-Vis DR spectrum shows the photoactivity in the visible light area and provides l
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Guan, Hao Yuan, Xiao Cheng Yang, Sheng Ming Jin, and Min Yang. "Synthesis and Catalytic Activity of Composite Materials TiO2/Ti-Al-MCM-41 by Chemical Vapor Deposition (CVD)." Advanced Materials Research 97-101 (March 2010): 1749–53. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.1749.

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TiO2/Ti-Al-MCM-41 (TAM) with high Ti content (Si/Ti=6.2) was prepared by chemical vapor deposition (CVD) of TiCl4 on Al-MCM-41 at low reaction temperature (423 K). The sample was characterized by X-ray diffraction (XRD), N2 adsorption/desorption, high resolution transmission electron microscopy (HRTEM) and diffuse reflectance ultraviolet-visible spectroscopy (DR UV-vis). The results showed that Ti atoms were in tetrahedral coordinated in the framework of Al-MCM-41. Meanwhile, higher Ti4+ ions coordination and bulk anatase titania was observed in the DR UV-vis spectra. TAM still exhibited hexag
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Dissertations / Theses on the topic "DR UV-Vis"

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Cakaj, Fatmir. "DR-UV/vis spectroscopy for studying the interaction of vanadium compounds with cellulose." Master's thesis, 2011. http://hdl.handle.net/10400.1/4526.

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Dissertação de mest., Qualidade em Análises, Faculdade de Ciências e Tecnologia, Univ. do Algarve, 2011<br>Cellulose is considered the most abundant natural polymer in our environment. It is assumed an almost infinite source of raw material for the increasing demand for environmentally friendly and biocompatible products. In spite of its very low solubility in water, cellulose is used in a wide range of applications including composites, netting, coatings, packing, paper, etc. The morphology of cellulose has a thoughtful effect on its reactivity, the hydroxyl groups located in the amorphous re
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Conference papers on the topic "DR UV-Vis"

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Matras-Postolek, Katarzyna, A. Zaba, S. Sovinska, and D. Bogdal. "Microwave-assisted preparation of ZnS and ZnSe nanocrystals with different morphologies for photodegradation process of organic dyes." In Ampere 2019. Universitat Politècnica de València, 2019. http://dx.doi.org/10.4995/ampere2019.2019.9998.

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Zinc sulphide (ZnS) and zinc selenide (ZnSe) and manganese-doped and un-doped with different morphologies from 1D do 3D microflowers were successfully fabricated in only a few minutes by solvothermal reactions under microwave irradiation. In order to compare the effect of microwave heating on the properties of obtained nanocrystals, additionally the synthesis under conventional heating was conducted additionally in similar conditions. The obtained nanocrystals were systematically characterized in terms of structural and optical properties using X-ray diffraction (XRD), scanning electron micros
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FIRPO, Guadalupe, Virginia M. VASCHETTI, Griselda V. GONZÁLEZ MERCADO, et al. "SILICA NANOPARTICLES: EXPLORING A GREENER ONE-POT SYNTHESIS." In Second Southern Science Conference - 2024. Araucária - Associação Científica, 2024. https://doi.org/10.48141/sscon_12_2024.pdf.

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In this work, we report a facile one-pot synthesis of silica nanoparticles (SiO2NPs) than the classical Stöber method, involving sodium metasilicate as a cheaper Si source than TEOS and shorter reaction times under neutral reaction conditions at room temperature. A multi-technical characterization of the SiO2NPs (XRD, FTIR, UV-vis DR,TEM, Z-potential, and N2 adsorption-desorption isotherms at 77 K) evidenced the formation of spherical NPs, with a polydisperse nature, negatively charged surface, and porous structure. A metric to assess the “greenness” of the proposed SiO2NPs synthesis allows to
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