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  1. Article: Sequential Approach to Liquid Fuel Desulfurization through Rhodococcus erythropolis Assisted Molybdenum Modified Euryale ferox Biomass

    Zaidi, Zakiullah / Sorokhaibam, Laxmi Gayatri

    Energy & fuels. 2022 Jan. 13, v. 36, no. 3

    2022  

    Abstract: A novel chemical–biological approach for liquid fuel desulfurization was investigated by surface modification of Euryale ferox biomass with molybdenum and Rhodococcus erythropolis, named FAT, Mo@FAT, and Rh-Mo@FAT, respectively. To probe their physical ... ...

    Abstract A novel chemical–biological approach for liquid fuel desulfurization was investigated by surface modification of Euryale ferox biomass with molybdenum and Rhodococcus erythropolis, named FAT, Mo@FAT, and Rh-Mo@FAT, respectively. To probe their physical and chemical properties, materials were characterized by various techniques such as powder X-ray diffraction (PXRD) , Fourier transform infrared (FTIR), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), Brunauer–Emmett–Teller (BET), high resolution transmission electron microscopy (HR-TEM), and scanning electron microscopy (SEM) analysis. ICP-AES confirms that doped Mo was 3.5 at %, whereas SEM and sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis were performed to ensure Rhodococcus erythropolis species deposition. SDS-PAGE of Rh-Mo@FAT confirms the presence of DSzA, DSzB, DSzC, and DSzD proteins which have a high catalytic efficiency for sulfur degradation. Desulfurization experiments were conducted on model fuel oil comprising 50 ppm of benzothiophene and dibenzothiophene in iso-octane and commercial fuel oil (kerosene and gasoline). Model fuel oil desulfurization kinetics at room temperature for 100% removal efficiency of benzothiophene was achieved at 225, 120, and 105 min, and that for dibenzothiophene was achieved at 240, 180, and 105 min using FAT, Mo@FAT, and Rh-Mo@FAT, respectively. The experimental results indicate that Rh-Mo@FAT can significantly reduce the concentration of organosulfur compounds in fuel oil. The present work also discusses the sequential desulfurization pathway and comparative study of previously reported molybdenum-based activated carbon, oxidative catalysts, and Rhodococcus erythropolis species.
    Keywords Euryale ferox ; Fourier transform infrared spectroscopy ; Rhodococcus erythropolis ; X-ray diffraction ; activated carbon ; ambient temperature ; biomass ; catalytic activity ; comparative study ; desulfurization ; energy ; fuel oils ; gasoline ; iso-octanes ; kerosene ; liquids ; molybdenum ; polyacrylamide gel electrophoresis ; sodium ; sulfur ; transmission electron microscopy
    Language English
    Dates of publication 2022-0113
    Size p. 1614-1625.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1483539-3
    ISSN 1520-5029 ; 0887-0624
    ISSN (online) 1520-5029
    ISSN 0887-0624
    DOI 10.1021/acs.energyfuels.1c02970
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Emerging trends in research and development on earth abundant materials for ammonia degradation coupled with H

    Zaidi, Zakiullah / Kamlesh / Gupta, Yesleen / Singhai, Sandeep / Mudgal, Manish / Singh, Archana

    Science and technology of advanced materials

    2024  Volume 25, Issue 1, Page(s) 2301423

    Abstract: Ammonia, as an essential and economical fuel, is a key intermediate for the production of innumerable nitrogen-based compounds. Such compounds have found vast applications in the agricultural world, biological world (amino acids, proteins, and DNA), and ... ...

    Abstract Ammonia, as an essential and economical fuel, is a key intermediate for the production of innumerable nitrogen-based compounds. Such compounds have found vast applications in the agricultural world, biological world (amino acids, proteins, and DNA), and various other chemical transformations. However, unlike other compounds, the decomposition of ammonia is widely recognized as an important step towards a safe and sustainable environment. Ammonia has been popularly recommended as a viable candidate for chemical storage because of its high hydrogen content. Although ruthenium (Ru) is considered an excellent catalyst for ammonia oxidation; however, its high cost and low abundance demand the utilization of cheaper, robust, and earth abundant catalyst. The present review article underlines the various ammonia decomposition methods with emphasis on the use of non-noble metals, such as iron, nickel, cobalt, molybdenum, and several other carbides as well as nitride species. In this review, we have highlighted various advances in ammonia decomposition catalysts. The major challenges that persist in designing such catalysts and the future developments in the production of efficient materials for ammonia decomposition are also discussed.
    Language English
    Publishing date 2024-01-09
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2027985-1
    ISSN 1878-5514 ; 1468-6996
    ISSN (online) 1878-5514
    ISSN 1468-6996
    DOI 10.1080/14686996.2023.2301423
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Hollow ZnO from assembly of nanoparticles: photocatalytic and antibacterial activity

    Zaidi, Zakiullah / Aditi Vijay / Kalpesh Vaghasiya / Manu Sharma / Rahul Kumar Verma / Sonalika Vaidya

    Journal of materials science. 2018 Nov., v. 53, no. 21

    2018  

    Abstract: Hollow shells of ZnO were formed by the assembly of nanoparticles using PEG 400 wherein PEG-400 acted like both a solvent and a structure directing agent. The structure, morphology and optical properties were characterized by using PXRD, SEM, TEM and ... ...

    Abstract Hollow shells of ZnO were formed by the assembly of nanoparticles using PEG 400 wherein PEG-400 acted like both a solvent and a structure directing agent. The structure, morphology and optical properties were characterized by using PXRD, SEM, TEM and absorption studies. The hollow shells were found to possess high crystallinity with a surface area of 8 m2 g−1. The assembly was formed by nanoparticles ranging from 50 to 60 nm, whereas the size of the hollow shell ranged from 500 nm to 1 micron. Photocatalytic activity of these nanostructures was studied using Rhodamine B (RhB) and methyl orange (MO). Nearly 99% of the RhB dye was found to be degraded in 60 min while for MO, the degradation was 97% in 50 min. The pseudo-first-order rate constant was calculated as 0.072 min−1 for the degradation of RhB and 0.075 min−1 for the degradation of MO. The hollow shells were found to exhibit significant bacterial inhibiting efficacy at a low concentration of the particles. Comparative studies were carried out for photodegradation of Rhodamine B dye and antibacterial activity using spherical particles of ZnO and assembly of particles to form rods of ZnO. The results indicated that these hollow nanostructures could be used as a potential catalyst for the removal of dyes from water and as an antibacterial agent.
    Keywords absorption ; antibacterial properties ; antibiotics ; catalysts ; crystal structure ; dyes ; methyl orange ; nanoparticles ; optical properties ; photocatalysis ; photolysis ; rhodamines ; scanning electron microscopy ; solvents ; surface area ; transmission electron microscopy ; zinc oxide
    Language English
    Dates of publication 2018-11
    Size p. 14964-14974.
    Publishing place Springer US
    Document type Article
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-018-2715-4
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Assembly of a coordination polymer with sulphate-capped pentamolybdate units and copper: synthesis, structure, magnetic and catalytic studies.

    Gupta, Yesleen / Zaidi, Zakiullah / Mehta, Sakshi / Chandewar, Pranay R / Kumar, Nikhil / Paul, Avijit K / Shee, Debaprasad / Mondal, Abhishake / Sorokhaibam, Laxmi Gayatri / Banerjee, Abhishek

    Dalton transactions (Cambridge, England : 2003)

    2022  Volume 51, Issue 18, Page(s) 7255–7267

    Abstract: A new coordination polymer based on the sulphate-capped pentamolybdate unit has been synthesized from the reaction of { ... ...

    Abstract A new coordination polymer based on the sulphate-capped pentamolybdate unit has been synthesized from the reaction of {Mo
    Language English
    Publishing date 2022-05-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d2dt00816e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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