سامانه پشتیبانی خدمات اطلاعات

  اخبار و اعلانات

 آمار

تعداد نشریات158
تعداد شماره‌ها6,230
تعداد مقالات67,755
تعداد مشاهده مقاله115,102,492
تعداد دریافت فایل اصل مقاله89,854,450
Azadeh, Maryam, Zamani, Cyrus, Ataie, Abolghasem. (1395). Synthesis of Si/MgO/Mg2SiO4 Composite from Rice Husk-Originated Nano-Silica. , 49(2), 92-96. doi: 10.7508/jufgnsm.2016.02.06
Maryam Azadeh; Cyrus Zamani; Abolghasem Ataie. "Synthesis of Si/MgO/Mg2SiO4 Composite from Rice Husk-Originated Nano-Silica". , 49, 2, 1395, 92-96. doi: 10.7508/jufgnsm.2016.02.06
Azadeh, Maryam, Zamani, Cyrus, Ataie, Abolghasem. (1395). 'Synthesis of Si/MgO/Mg2SiO4 Composite from Rice Husk-Originated Nano-Silica', , 49(2), pp. 92-96. doi: 10.7508/jufgnsm.2016.02.06
Azadeh, Maryam, Zamani, Cyrus, Ataie, Abolghasem. Synthesis of Si/MgO/Mg2SiO4 Composite from Rice Husk-Originated Nano-Silica. , 1395; 49(2): 92-96. doi: 10.7508/jufgnsm.2016.02.06

Synthesis of Si/MgO/Mg2SiO4 Composite from Rice Husk-Originated Nano-Silica

Journal of Ultrafine Grained and Nanostructured Materials
مقاله 6، دوره 49، شماره 2، اسفند 2016، صفحه 92-96    اصل مقاله (814.3 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.7508/jufgnsm.2016.02.06
نویسندگان
Maryam Azadeh؛ Cyrus Zamani* ؛ Abolghasem Ataie
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O.Box: 11155-4563, Tehran, Iran.
چکیده
Silica exists in Rice husk, an agriculture waste, as a naturally occurring phase. In first step, acidic pre-treatment and calcination of the rice husk were performed to obtain nano-silica, in which various sizes of the nano-silica, totally with sizes under 80 nm, were achieved. Second, to reduce nano-silica to elemental Si and subsequently formation of the composite, Mg used as the reducing agent. In this work, the as-obtained composite mainly is the product of magnesiothermic reduction reaction of the nano-silica, which finally resulted in formation of elemental Si (silicon), MgO (magnesia) and Mg2SiO4 (magnesium silicate). The as-synthesized composite can be used as anode in lithium ion batteries. The products in each step were characterized using X-ray powder diffraction (XRD) and scanning electron microscopy (FESEM and HRSEM) techniques. X-ray powder diffraction patterns confirmed the formation of almost amorphous silica while the FE-SEM images were representing the spherical silica particles at various calcination temperatures. After the magnesiothermic reduction process, HRSEM micrographs indicated the formation of Si-MgO-Mg2SiO4 composite with particle sizes of 180-300 nm. The phase composition analysis was calculated by Rietveld method The electrical response of the Si/MgO/Mg2SiO4 composite was measured to be of 6×108 Ω.m resulted from I-V measurement.
کلیدواژه‌ها
Nano-silica؛ Silicon؛ Rice Husk؛ Magnesiothermic reduction؛ Composite
مراجع
1. Chandrasekhar SA, Satyanarayana KG, Pramada PN, Raghavan P, Gupta TN. Review processing, properties and applications of reactive silica from rice husk—an overview. Journal of Materials Science. 2003;38(15):3159-68.
2. Omatola KM, Onojah AD. Elemental analysis of rice husk ash using X-ray fluorescence technique. International Journal of Physical Sciences. 2009;4(4):189-93.
3. Soltani N, Bahrami A, Pech-Canul MI, González LA. Review on the physicochemical treatments of rice husk for production of advanced materials. Chemical Engineering Journal. 2015;264:899-935.
4. Zamani C, Nazarpour S, Abdollahzadeh-Ghom S, Cirera A. Micro and Mesoporous Materials for Emerging Applications. Recent Patents on Materials Science. 2010;3(1):57-67.
5. Bansal V, Ahmad A, Sastry M. Fungus-mediated biotransformation of amorphous silica in rice husk to nanocrystalline silica. Journal of the American Chemical Society. 2006;128(43):14059-66.
6. NuLi Y, Yang J, Wang J, Li Y. Electrochemical intercalation of Mg2+ in magnesium manganese silicate and its application as high-energy rechargeable magnesium battery cathode. The Journal of Physical Chemistry C. 2009;113(28):12594-7.
7. Kohandehghan A, Kalisvaart P, Kupsta M, Zahiri B, Amirkhiz BS, Li Z, Memarzadeh EL, Bendersky LA, Mitlin D. Magnesium and magnesium-silicide coated silicon nanowire composite anodes for lithium-ion batteries. Journal of Materials Chemistry A. 2013;1(5):1600-12.
8. Della VP, Kühn I, Hotza D. Rice husk ash as an alternate source for active silica production. Materials Letters. 2002;57(4):818-21.
9. Chandrasekhar S, Pramada PN, Majeed J. Effect of calcination temperature and heating rate on the optical properties and reactivity of rice husk ash. Journal of Materials Science. 2006;41(23):7926-33.
10. Bao Z, Weatherspoon MR, Shian S, Cai Y, Graham PD, Allan SM, Ahmad G, Dickerson MB, Church BC, Kang Z, Abernathy Iii HW. Chemical reduction of three-dimensional silica micro-assemblies into microporous silicon replicas. Nature. 2007;446(7132):172-5.
11. Will G. Powder diffraction: The Rietveld method and the two stage method to determine and refine crystal structures from powder diffraction data. Springer Science & Business Media; 2006.
12. Liu N, Huo K, McDowell MT, Zhao J, Cui Y. Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes. Scientific Reports. 2013;3:1919:DOI: 10.1038/srep01919.
13. Szczech JR, Jin S. Nanostructured silicon for high capacity lithium battery anodes. Energy & Environmental Science. 2011;4(1):56-72.
14. Kim H, Lee EJ, Sun YK. Recent advances in the Si-based nanocomposite materials as high capacity anode materials for lithium ion batteries. Materials Today. 2014;17(6):285-97.

آمار
تعداد مشاهده مقاله: 2,343
تعداد دریافت فایل اصل مقاله: 1,709


سامانه مدیریت نشریات علمی. قدرت گرفته از سیناوب