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    Novel synthesis route for preparation of porous nitrogen-doped carbons from lignocellulosic wastes for high performance supercapacitors

    , Article Journal of Alloys and Compounds ; Volume 827 , 2020 Pourjavadi, A ; Abdolmaleki, H ; Doroudian, M ; Hosseini, S. H ; Sharif University of Technology
    Elsevier Ltd  2020
    Porous nitrogen-doped carbons derived from biomass wastes are considered as promising materials for energy storage devices. Herein, a novel and scalable synthesis route for preparation of these materials from sugarcane bagasse waste is demonstrated. The synthesis process includes a hydrogel intermediate in which delignified bagasse and polyacrylamide networks are interlaced in molecular scale and calcium acetate serves as a hard template within the polymeric chains. After pre-carbonization and chemical activation of the hydrogel, porous nitrogen-doped carbon with high surface area of 1834.3 m2 g−1 and considerable pore volume of 1.03 cm3 g−1 was obtained with nitrogen and oxygen contents of... 

    Ethanol production from sugarcane bagasse by means of on-site produced and commercial enzymes; A comparative study

    , Article Periodica Polytechnica: Chemical Engineering ; Volume 56, Issue 2 , 2012 , Pages 91-96 ; 03245853 (ISSN) Shaibani, N ; Yaghmaei, S ; Andalibi, M. R ; Ghazvini, S ; Sharif University of Technology
    In this study ethanol was produced without using expensive commercial enzymes from sugarcane bagasse. Alkali pretreatment was used to prepare biomass before enzymatic hydrolysis. The comparison between NaOH, KOH and Ca(OH)2 revealed that NaOH has been more effective on bagasse structure. The required enzymes for biomass hydrolysis were produced by bagasse solid state fermentation using three fungi: Trichoderma longibrachiatum, T. reesei and Aspergillus niger. Results indicated enzyme solution produced by A. niger has functioned better than the other two in cellulose conversion during sole hydrolysis. Ethanol was produced by simultaneous saccharification and fermentation (SSF) with on-site... 

    Optimization of sugarcane bagasse hydrolysis process by economic criteria

    , Article Advances in Environmental Biology ; Volume 5, Issue 7 , 2011 , Pages 1900-1903 ; 19950756 (ISSN) Darouneh, E ; Alavi, A ; Vosoughi, M ; Ardjmand, M ; Seifkordi, A. A ; Zabihi, V ; Radjabi, R ; Hedayat, N ; Sharif University of Technology
    Various processes are used for production of value-added materials from sugarcane bagasse. Hydrolysis processes are the most commonly used methods for producing new products from this low value byproduct. Sulfuric acid hydrolysis processes are the best processing options due to their fast reaction and low process cost. The goal of this study was to investigate an optimized hydrolysis method which can produce fermentable sugar-containing liquor economically. In the other words it was designed to minimize the toxic materials to a level that cannot affect the citric acid production by Aspergillus niger. Results showed the optimum condition for one-step hydrolysis processes occurs at the... 

    Synthesis of Porous Nitrogen-Doped Carbon materials from Sugarcane Bagasse Wastes and Investigation of its Applications

    , M.Sc. Thesis Sharif University of Technology Abdolmaleki, Hamed (Author) ; Pourjavadi, Ali (Supervisor)
    Reprocessing of different industrial and agricultural wastes become very Important in today’s world because it reduces the environmental pollution arising from waste accumulation as well as providing cheap and sustainable raw material for industries.Among different wastes, sugarcane bagasse is produced in large quantities in Iran specially in Khuzestan province. Bagasse is mainly consists of 3 natural polymers;cellulose, hemicellulose and lignin and can be used for production of chipboard and MDFs, activated carbon, bioethanol and acid citric The purpose of this research is the synthesis of porous nitrogen-doped carbon materials from bagasse wastes and investigate the use of these compounds... 

    Synthesis of Magnetic Adsorbent Nanocomposites based on Modified Sugarcane Bagasse and Iron Nanoparticle for dye Removal from Aqueous Solutions

    , M.Sc. Thesis Sharif University of Technology Alizadeh Monfared, Davood (Author) ; Pourjavadi, Ali (Supervisor) ; Alamolhoda, Ali Asghar (Supervisor)
    Lately, a wide application of eco-friendly polysaccharide-based hydrogels in waste water treatment has received enormous attention in the literature. The effluents containing dye materials from the processing industries are washed off into rivers and lakes which can be very harmful to creatures. Low-cost biopolymers and biodegradable adsorbents have been researched to be a good tool to minimize the environmental hazards caused by the industrial effluents by removal of these toxic and carcinogenic dyes from the waste effluents. In this study, an eco-friendly superabsorbent hydrogel was prepared by using of sugarcane bagasse, two hydrophilic monomers, magnetic nanoparticle and methylene... 

    Monitoring of Chemical Elements and Cane Juice Impurities and the Effect on Raw Sugar Waste Agro- Industry Hakim Farbi

    , M.Sc. Thesis Sharif University of Technology Mohammadiyan Fard, Ziba (Author) ; Matloubi Moghaddam, Firouz (Supervisor) ; Alamolhoda, Ali Asghar (Co-Advisor)
    Cane sugar impurities cause reduse production sugar in cane sugar industry.These impurities include polysaccharide for example starch, dextran and inorganic ash constituent such as potassium, sodium calcium magnesium and silica .The amount of impurities in the cane sugar depend on many factors including variety , grooving conditions and regional climate. Removal of impurities from cane sugar juice by clarification is an essential part of process of raw sugar manufacture. This process is based on the addition of lime, phosphates and polyelectrolyte. In this study effect of the amount of lime, phosphates and poly electrolyte on removal of various impurities has been investigated.In addition... 

    Preparation of activated carbon dots from sugarcane bagasse for naphthalene removal from aqueous solutions

    , Article Separation Science and Technology (Philadelphia) ; Volume 53, Issue 16 , 2018 , Pages 2536-2549 ; 01496395 (ISSN) Eslami, A ; Borghei, S. M ; Rashidi, A ; Takdastan, A ; Sharif University of Technology
    Taylor and Francis Inc  2018
    The synthesis of cheap and environmental friendly adsorbent from residual sugarcane bagasse was done for the removal of naphthalene from aqueous solution. The activated carbon dot was obtained by KOH chemical activation of carbon dots. The characteristics of carbon dots and activated carbon dots were determined using field emission scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and thermogravimetric analysis. A series of experiments were conducted in a batch system to assess the effect of the system variables, i.e., initial pH, initial naphthalene concentration, adsorbent dosage, and contact time. The kinetic data showed better fit to the... 

    Synthesis and characterization of bagasse poly(methyl methacrylate) graft copolymer

    , Article Macromolecular Symposia ; Volume 274, Issue 1 , 2008 , Pages 49-54 ; 10221360 (ISSN) Sarvi, I ; Pourjavadi, A ; Noei Aghaei, M. A ; Sharif University of Technology
    Graft copolymerization of methyl methacrylate (MMA) was carried out on bagasse fibers in an aqueous medium using eerie ammonium nitrate (CAN) as initiator under a neutral atmosphere. In order to obtain the optimum condition for graft copolymerization, the effects of initiator concentration, temperature, time of reaction, and monomer concentration were studied. The maximum grafting percent was found to be 122%. The bagasse grafted poly(methyl methacrylate) was characterized by FTIR and its thermal behavior was characterized by TGA. Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA  

    Butanol Production from Bagasse Sugarcane Black Liquor by Native Strain and Clostridium Acetobutylicum Species

    , M.Sc. Thesis Sharif University of Technology Hassani Atashgah, Milad (Author) ; Shayegan, Jalaleddin (Supervisor) ; Vossoughi, Manouchehr (Supervisor) ; Sedighi, Mahsa (Co-Supervisor)
    Considering the limitations of fossil fuels in recent years, as well as increasing demand for biofuels, it is anticipated that future attention to biofuels will increase further. Among biofuels, due to some disadvantages of bioethanol and biodiesel fuel, there is a tendency to use biobutanol, which does not have the disadvantages of the mentioned fuels. The cost of chemical production of butanol also led researchers to use biotechnology production of butanol. According to studies, butanol production can be achieved by fermenting some sugars such as glucose, xylose, and ... by anaerobic microorganism, but the cost of using these sugars has resulted in the use of natural sources of these... 

    Fabrication and Investigation of Structure and Mechanical Properties of Bagasse Fibers Reinforced PP: Role of Alkalization and Calcium Carbonate Filler

    , M.Sc. Thesis Sharif University of Technology Asgharpour, Ali (Author) ; Bagheri, Reza (Supervisor)
    The consumption of plastics in the world is increasing and this is accompanied by the challenges of production from oil products and carbon footprint, waste production and environmental issues. The solutions to these challenges are material recycling and the production of biocompatible plastics. Polypropylene is a widely used polymer that is commonly used in conjunction with reinforcements such as fiberglass. Natural fibers can be substituted to increase the biocompatibility of the composite, which, despite its many advantages, presents challenges. The most important challenge is the poor adhesion of the fibers and the matrix due to the hydrophilicity of natural fibers and hydrophobicity of... 

    All-Carbon negative differential resistance nanodevice using a single flake of nanoporous graphene

    , Article ACS Applied Electronic Materials ; Volume 3, Issue 8 , 2021 , Pages 3418-3427 ; 26376113 (ISSN) Rahighi, R ; Akhavan, O ; Shayesteh Zeraati, A ; Sattari Esfahlan, S. M ; Sharif University of Technology
    American Chemical Society  2021
    A temperature-induced degenerate p-type graphene nanopore/reduced graphene oxide (GNP/rGO) heterojunction-based nanodevice was prepared and studied for the first time, showing a robust negative differential resistance (NDR) feature. In this regard, cellulose-based perforated graphene foams (PGFs), containing numerous nanopores (with an average size of ∼2 nm surrounded by nearly six-layer rGO walls) were synthesized using bagasse as a green starting material. The PGFs with an essential p-type semiconducting property showed a band gap energy of ∼1.8 eV. The observed two-terminal NDR peak could present stable and reversible features at high temperatures of 586-592 K. It was demonstrated that... 

    Preparation of amine–modified lignin and its applicability toward online micro–solid phase extraction of valsartan and losartan in urine samples

    , Article Journal of Chromatography A ; Volume 1643 , 2021 ; 00219673 (ISSN) Taherzadeh Ghahfarrokhi, M ; Zeinali, S ; Bagheri, H ; Sharif University of Technology
    Elsevier B.V  2021
    In the present work, with the focus on an environmentally–friendly approach, some gels were prepared by synthesizing amine–modified lignin, extracted from sugarcane bagasse, and further esterification and subsequent freeze–drying. These lignin–based gels were implemented as extractive phases in an online micro–solid phase extraction (μSPE) setup in conjunction with high performance liquid chromatography (HPLC) with UV detector. The developed method was used for analytical determination of valsartan and losartan in urine samples. To study the effect of the functionalization process, the efficiency of the unmodified lignin and the functionalized lignin were compared both in the absence and the...