scholarly journals Hydrophilic and Hydrophobic Mesoporous Silica Derived from Rice Husk Ash as a Potential Drug Carrier

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1142 ◽  
Author(s):  
Supakij Suttiruengwong ◽  
Sommai Pivsa-Art ◽  
Metta Chareonpanich
Keyword(s):  
Mesoporous Silica ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Drug Carrier ◽  
Potential Drug

scholarly journals Hydrophilic and Hydrophobic Mesoporous Silica Derived from Rice Husk Ash as a Potential Drug Carrier

2018 ◽  
Author(s):  
Supakij Suttiruengwong ◽  
Metta Chareonpanich ◽  
Sommai Pivsa-Art
Keyword(s):  
Mesoporous Silica ◽  
Surface Area ◽  
Rice Husk ◽  
Release Rate ◽  
Pore Diameter ◽  
Rice Husk Ash ◽  
Release Kinetics ◽  
Drug Carrier ◽  
Bet Surface Area ◽  
Hydrophobic Nature

This work describes the preparation of mesoporous silica by the green reaction of rice husk ash (RHA) with glycerol, followed by the modification and the potential use as a drug carrier. The reaction was carried out at 215 °C for 2 h. The solution was further hydrolyzed with deionized water and aged for various times (24, 48, 120, 360, 528 and 672 h) before calcinations at 500 oC for 24 h. Further treatment of prepared mesoporous silica was performed using trimethylmethoxysilane (TMMS) to obtain hydrophobic Mesoporous silica. For all synthesized silica, silica contents were as high as 95%wt, whereas organic residues were less than 3%wt. RHA-glycerol showed the highest specific surface area with smallest pore diameter (205.70 m2/g, 7.46 nm) when aged for 48 h. The optimal hydrolysis-ageing period of 120 h resulted in 500.7 m2/g BET surface area, 0.655 cm3/g pore volume and 5.23 nm pore diameter. The surface modification of RHA-glycerol was succeeded through the reaction with TMMS as confirmed by FTIR. Ibuprofen was selected as a model drug for the adsorption experiments. The adsorption under supercritical CO2 was carried out at isothermal temperature of 40 ˚C and 100 bar, % ibuprofen loading of TMMS modified mesoporous silica (TMMS-g-MS) was 6 times less than mesoporous silica aged for 24 h (MS-24h) due to the hydrophobic nature of modified mesoporous silica, not surface and pore characteristics. The release kinetics of ibuprofen-loaded mesoporous silicas were also investigated in vitro. The release rate of ibuprofen-loaded MS-24h was much faster than that of ibuprofen-loaded TMMS-g-MS, but comparable to the crystalline ibuprofen. The slower release rate was attributed to the diffusion control and the stability of hydrophobic nature of modified silica. This would allow the design for the controlled release drug delivery system.

Co-templating Synthesis of Bimodal Mesoporous Silica for Potential Drug Carrier

2016 ◽  
Vol 1 (7) ◽  
pp. 1339-1346 ◽  
Author(s):  
Wei C. Chu ◽  
Dong R. Peng ◽  
Bishnu P. Bastakoti ◽  
Malay Pramanik ◽  
Victor Malgras ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Drug Carrier ◽  
Potential Drug ◽  
Templating Synthesis

Adsorption of Methyl Blue on Mesoporous Materials Using Rice Husk Ash as Silica Source

2016 ◽  
Vol 16 (4) ◽  
pp. 4108-4114 ◽  
Author(s):  
Nhat Thien Nguyen ◽  
Shiao-Shing Chen ◽  
Nguyen Cong Nguyen ◽  
Hau Thi Nguyen ◽  
Hsiao Hsin Tsai ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Mesoporous Materials ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Methyl Blue ◽  
Ammonium Bromide ◽  
Tem Analysis ◽  
Silica Source ◽  
Silica Materials ◽  
Mesoporous Silica Materials

It is recognized that recycling and reuse of waste can result in significant savings in materials and energy. In this research, the adsorption of methyl blue (MB) using waste rice husk ash (Rha) and mesoporous silica materials made from Rha (R-MCM) were analyzed. Mesoporous silica materials were synthesized using cetyltrimethyl ammonium bromide (CTAB) as a cationic surfactant and Rha as the silica source. The prepared samples were characterized by Brunnaur-Emmet-Teller (BET) adsorption isotherm analyzer and transmission electron microscope (TEM) analysis. The results showed the surface area of R-MCM materials was 1347 m2g−1 and the pore volume was 0.906 cm3g−1. TEM analysis showed that the mesoporous materials generally exhibited ordered hexagonal arrays of mesopores with a uniform pore size. The effects on adsorption performance under different initial dye concentrations, different pH values and different dosages of adsorbent were also studied. Both Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. The results show that the maximum removal efficiency of MB more than 99%.

scholarly journals Mesoporous Silica from Rice Husk Ash

2011 ◽  
Vol 5 (2) ◽  
Author(s):  
V.R. Shelke ◽  
S.S. Bhagade ◽  
S.A. Mandavgane
Keyword(s):  
Mesoporous Silica ◽  
Rice Husk ◽  
Rice Husk Ash

In-situ incorporation of ruthenium/copper nanoparticles in mesoporous silica derived from rice husk ash for catalytic acetylation of glycerol

2020 ◽  
Vol 160 ◽  
pp. 564-574 ◽  
Author(s):  
Rajabathar Jothi Ramalingam ◽  
Jimmy Nelson Appaturi ◽  
Thiruchelvi Pulingam ◽  
Hamad A Al-Lohedan ◽  
Dhaifallah M. Al-dhayan
Keyword(s):  
Mesoporous Silica ◽  
Rice Husk ◽  
Copper Nanoparticles ◽  
Rice Husk Ash

scholarly journals Efficient Rice-Husk-Derived Silica Nanocatalysts for Organic Dye Removal from Water

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 815
Author(s):  
Violeta-Carolina Niculescu ◽  
Maria Simona Raboaca
Keyword(s):  
Mesoporous Silica ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Catalyst Support ◽  
Negative Effects ◽  
Food Ingredient ◽  
Mesoporous Silica Material ◽  
Silica Material ◽  
Hazardous Organic Compounds ◽  
By Products

Rice is the second most extensively consumed food ingredient, and its by-products in the paddy field include rice husk and straw. Rice husk ash, resulting from rice husk burning, is considered an environment menace, inducing negative effects on the area in which it is disposed of. In this study, rice husk was applied as a silicate source to obtain mesoporous silica material. Characterization techniques confirmed the well-ordered mesophase and resemblance of mesoporous silica resulting from rice husk ash with one obtained from conventional silica sources. The mesoporous silica material was further used as catalyst support. The resulting catalysts were used for rhodamine 110 oxidation, proving high potential for oxidizing hazardous organic compounds, such as dyes from water, resulting in environmentally harmless products.

Recovery of Mesoporous Silica from Waste Rice Husk Ash of Biomass Energy Industry

2012 ◽  
Vol 430-432 ◽  
pp. 873-876 ◽  
Author(s):  
Wen Jie Zhu ◽  
Yang Zhou ◽  
Wen Hui Ma ◽  
Ming Ming Li ◽  
Jie Yu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Biomass Energy ◽  
Energy Industry ◽  
X Ray Diffraction ◽  
Mesoporous Silica Material ◽  
Surface Areas ◽  
Silica Source ◽  
Silica Material

In this study, the mesoporous silica material was hydrothermally synthesized from the rice husk ash of biomass energy industry with cetyltrimethylammonium bromide (CTAB) as template agents. The structure and morphology of mesoporous silica material was investigated based on the analysis of X-ray diffraction (XRD), N2 sorption/desorption (BET), Fourier transformation infra-red spectrum (FTIR). The results indicated that mesoporous silica material was successfully prepared by substituting rice husk ash for the traditional silica source of tetraethyl orthosilicate, and the mesoporous silica material displayed pore sizes in the 2-4 nm range with specific surface areas as high as 363 m2/g.

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