Preparation and characterization of nanosilica from rice husk ash by chemical treatment combined with calcination

Le Nghiem Anh Tuan, Lai Thi Kim Dung, Le Doan Thanh Ha, Nguyen Quoc Hien, Dang Van Phu, Bui Duy Du


This work presented the results of the study on synthesis and characterization of nanosilica from rice husk ash (RHA). Nanosilica was obtained by calcination of HCl treated RHA at 700 oC for 2 h. X-ray diffraction (XRD) pattern showed only one peak at 2q ~22o confirming the amorphous structure of nanosilica. The chemical composition assessed by energy dispersive X-ray spectroscopy (EDX) showed that the obtained nanosilica was of high purity. TEM image measured by transmission electron microscopy (TEM) revealed that the obtained nanosilica was in spherical morphology with the average diameter of about 45.5±7.2 nm. The particle size distribution of nanosilica determined by dynamic laser scattering (DLS) was of Gaussian mode. The FTIR spectrum indicated the presence of silanol and siloxane groups in nanosilica. Thus, the synthesized nanosilica can be used for application in different fields.

Keywords. Rice husk ash, nanosilica, amorphous.


Rice husk ash, nanosilica, amorphous

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Y. Shen, P. Zhao, Q. Shao. Porous silica and carbon derived materials from rice husk pyrolysis char-review, Microporous and Mesoporous Materials, 188, 46-76 (2014).

R. Pode. Potential applications of rice husk ash waste from rice husk biomass power plant, Renewable and Sustainable Energy Reviews, 53, 1468-1485 (2016).

S. Sankar, S. K. Sharma, N. Kaur, B. Lee, D. Y. Kim, S. Lee, H. Jung. Biogenerated silica nanoparticles synthesized from sticky, red, and brown rice husk ashes by chemical method, Ceramics International, 42, 4875-4885 (2016).

V. H. Le, C. N. H. Thuc, H. H. Thuc. Synthesis of silica nanoparti-cles from Vietnamese rice husk by sol–gel method, Nanoscale Research Letters, 8(1), 58-67 (2013).

P. Lu and Y. L. Hsieh. Highly pure amorphous silica nano-disks from rice straw, Powder Technology, 225, 149-155 (2012).

T. H. Liou and C. C. Yang. Synthesis and surface characteristics of nanosilica produced from alkali-extracted rice husk ash, Materials Science and Engineering B, 176, 521-529 (2011).

A. Tadjarodi, M. Haghverdi, V. Mohammadi. Preparation and characterization of nano-porous silica aerogel from rice husk ash by drying at atmospheric pressure, Materials Research Bulletin, 47, 584-2589 (2012).

T. T. Nguyen, H. M. P. Nguyen, N. T. T. Ho, T. B. T. Pham, T. K. C. Nguyen, V. N. Le, T. T. Nguyen, X. A. Trinh. Synthesis of SiO2 nanoparticles from rice husk ash by precipitation method, Journal of Science Cantho university-Vietnam, 32, 120-124 (2014).

W. Wang, J. C. Martin, X. Fan, A. Han, Z. Luo, L. Sun. Silica nanoparticles and frameworks from rice husk biomass, ACS Applied Materials and Interfaces, 4, 977-981 (2012).

E. Rafiee, S. Shahebrahimi, M. Feyzi, M. Shaterzadeh. Optimization of synthesis and characterization of nanosilica produced from rice husk (a common waste material), International Nano Letters, 2, 29 (2012).

S. Gu, J. Zhou, Z. Luo, Q. Wang, M. Ni. A detailed study of the effects of pyrolysis temperature and feedstock particle size on the preparation of nanosilica from rice husk, Industrial Crops and Products, 50, 540-549 (2013).

A. A. Alshatwi, J. Athinarayanan, V. S. Periasamy. Biocompatibility assessment of rice husk-derived biogenic silica nanoparticles for biomedical applications, Materials Science and Engineering C, 47, 8-16 (2015).

G. M. F. Gomes, C. Philipssen, E. K. Bard, L. D. Zen, G. de Souza. Rice husk bubbling fluidized bed combustion for amorphous silica synthesis, Journal of Environmental Chemical Engineering, 4(2), 2278-


R. A. Bakar, R. Yahya, S. N. Gan. Production of high purity amorphous silica from rice husk, Procedia Chemistry, 19, 189-195 (2016).

S. Gu, J. Zhou, C. Yu, Z. Luo, Q. Wang, Z. Shi. A novel two-staged thermal synthesis method of generating nanosilica from rice husk via pre-pyrolysis combined with calcination, Industrial Crops and Products, 65, 1-6 (2015).

X. Ma, B. Zhou, W. Gao, Y. Qu, L. Wang, Z. Wang, Y. Zhu. A recyclable method for production of pure silica from rice hull ash, Powder Technology, 217, 497-501 (2012).

H. Sixiao and Y. L. Hsieh. Preparation of activated carbon and silica particles from rice straw, ACS Sustainable Chemistry & Engineering, 2, 726-734 (2014).

P. D. Dung, L. S. Ngoc, N. N. Duy, N. N. Thuy, L. T. M. Truc, B. V. Le, D. V. Phu, N. Q. Hien. Effect of nanosilica from rice husk on the growth enhancement of chili plant (Capsicum frutescens L.), J. Sci. Technol., 54(5), 607-613 (2016).