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    Wyświetlanie 1-4 z 4
    Tytuł:
    Natural sun-light assisted photocatalytic and electrocatalytic activity of WO3-TiO2 novel nanomaterial
    Autorzy:
    Kamalakkannan, J.
    Balraj, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1157041.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Photocatalysis
    Reusability
    Sun light
    Opis:
    The WO3-TiO2 novel nanomaterial was synthesized by precipitation method and sonication technique. The nanomaterial for the degradation of malachite green (MAG) dye under natural sun light irradiation. The synthesized nanomaterial is characterized by HR-SEM with EDX, PL and UV-Vis DRS analysis. The photodegradation of MAG at various parameters are reported. The mechanisms of dye degradation in natural sun light explain the higher photocatalytic activity of the catalyst. The result indicates the advantage of wastewater treatment by it. The electrochemical study from DSSC analysis showed increased current by WO3-TiO2 nanomaterial. It was proposed that the catalyst was found to be stable and reusable.
    Źródło:
    World Scientific News; 2018, 94, 2; 276-286
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of amino-, epoxy- and carbonyl-functionalized halloysite and its application in the immobilization of aminoacylase from Aspergillus melleus
    Autorzy:
    Kołodziejczak-Radzimska, Agnieszka
    Jesionowski, Teofil
    Powiązania:
    https://bibliotekanauki.pl/articles/110662.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    functionalized halloysite
    physicochemical and structural evaluation
    immobilization
    thermal and chemical stability
    reusability
    Opis:
    Functionalized halloysite was used as a support for the immobilization of an enzyme. The surface of halloysite was modified with amino (–NH), epoxy (–C(O)C) and carbonyl (–C=O) groups. Both unmodified and modified forms of the support underwent a comprehensive physicochemical and structural evaluation, including morphological, structural, thermogravimetric and spectroscopic analysis. Aminoacylase from Aspergillus melleus was used as the enzyme in the immobilization process. The process of immobilization by adsorption was performed for 1, 6 and 24 h using different concentrations of enzyme solution (0.5, 1 and 3 mg/cm3). The quantity of aminoacylase loaded onto the support was calculated by the Bradford method. Free and immobilized aminoacylase were used to catalyze the deacetylation of N-acetyl-L-methionine. Additionally, the thermal and chemical stability of the obtained biocatalytic systems were evaluated, as well as the reusability of the immobilized systems. The biocatalytic system with amino groups demonstrated activity above 70% in the pH range 4–9 and 60% in the temperature range 30–70 °C. Aminoacylase immobilized on amino-functionalized halloysite also retains around 50% of its initial activity after five reaction cycles.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 1; 128-139
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High Structural Stability and Adsorption Capacity of Zn/Al-Biochar and Cu/Al-Biochar Toward Adsorption of Cr(VI)
    Autorzy:
    Palapa, Neza Rahayu
    Taher, Tarmizi
    Siregar, Patimah Mega Syah Bahar Nur
    Normah, -
    Juleanti, Novie
    Wijaya, Alfan
    Badri, Arini Fousty
    Lesbani, Aldes
    Powiązania:
    https://bibliotekanauki.pl/articles/1839586.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    layered double hydroxide
    chromium
    adsorption
    reusability
    Opis:
    Layered double hydroxide (LDH) Zn/Al and Cu/Al was synthesized by using the coprecipitation method under base condition at pH 10 following with formation of composites based on biochar (BC) to form Zn/Al-BC and Cu/ Al-BC. The materials were characterized by XRD, FTIR, BET, and thermal analyses. Furthermore, materials was applied as adsorbent of Cr(VI) on aqueous solution. The performance of composites as adsorbent was evaluated by reusability of adsorbent toward Cr(VI) adsorption process. The results showed that Cu/Al-BC and Zn/Al-BC can reuse the re-adsorption process with the adsorption ability of more than 60%. The adsorption capacity of Cu/ Al-BC and Zn/Al-BC was higher than that of starting materials and up to 384.615 mg/g for Cu/Al-BC and 666.667 mg/g for Zn/Al-BC. Both composites showed the potential adsorbents to remove Cr(VI) from aqueous solution.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 4; 213-223
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Thermal Stability of Melamine-Formaldehyde-Nitro Aniline Ion-Exchange Resin
    Autorzy:
    Zala, S. N.
    Gondaliya, M. B.
    Mahetar, J. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412657.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ion exchange
    resin
    melamine
    formaldehyde
    synthesis
    thermal stability
    reusability
    antimicrobial
    Opis:
    A series of resins was synthesized and analyzed for selective ion-exchange nature for some metals. Substituted aniline was reacted with formaldehyde, melamine. For the synthesis of ion-exchange resins, sulfuric acid was used as a catalyst. These resins were characterized by elemental analysis and studied antimicrobial activities. Synthesized Resin shows ion exchange capability and moderate activity against microbial. Ion exchange resin also showed reusability and stability at an elevated temperature.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 13, 2; 112-118
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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