Synthesis of hexagonal and cubic mesoporous silica using power plant bottom ash

Chandrasekar, Govindasamy; You, Kwang-Seok; Ahn, Ji-Whan; Ahn, Wha‐Seung

doi:10.1016/j.micromeso.2007.08.019

Cited by 80 publications

(48 citation statements)

References 31 publications

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“…The larger amount of silicate anions present could condensate and hydrolyse resulting in a higher surface area. On the other hand, Chandrasekar et al [8] explains the low specific area of FA-derived mesoporous materials being due to the LOI loss on ignition inclusion of Al into the silica structure under alkaline conditions. It is known that the specific area decreases also with the increase in the amount of impurities present in the sample (included in the silica framework) [8].…”

Section: Fa-based Mcm-41mentioning

confidence: 99%

“…On the other hand, Chandrasekar et al [8] explains the low specific area of FA-derived mesoporous materials being due to the LOI loss on ignition inclusion of Al into the silica structure under alkaline conditions. It is known that the specific area decreases also with the increase in the amount of impurities present in the sample (included in the silica framework) [8]. From amongst the samples tested, the smallest specific area was exhibited by the F-MCM-41(3) sample which contained the most Al (the lowest Si/Al ratio) and, at the same time, most impurities left from the FA extract (Table 5).…”

Section: Fa-based Mcm-41mentioning

confidence: 99%

“…This fact encouraged searches for new possibilities of using FA as a source of silicon and aluminium. The synthesis of FA-based mesoporous materials, the information of which can be found in references [3][4][5][6][7][8], has turned out to be one of those possibilities. Although porous solid bodies (containing micro-, meso-and macropores) are a group of materials being widely used in catalytic, purification and separation processes for a long time, the synthesis of materials containing mesopores of uniform size fructified into a success only in 1992, when scientists of the Mobil Company discovered a family of materials designated with the symbol M41S [9].…”

Section: Introductionmentioning

confidence: 99%

“…On the basis of studies available in the literature [3][4][5][6][7][8], the Si/Al ratio and Si contents in the FA filtrate can be ranked amongst the main factors influencing the synthesis of mesoporous materials from FA. It is known, that this ratio depends not only on the method of recovery of Si and Al from the solution, but in particular also on the chemical and mineralogical composition of FA, from which it is obtained.…”

Section: Introductionmentioning

confidence: 99%

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Thermogravimetry applied to characterization of fly ash-based MCM-41 mesoporous materials

Majchrzak‐Kucęba

2011

J Therm Anal Calorim

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The thermogravimetry (TG) was used for characterization of the fly ash (FA)-based MCM-41 mesoporous materials. MCM-41 mesoporous materials were synthesized using silica extracts from different FA. The synthesis of MCM-41 from FA was carried out by the hydrothermal method using the supernatants of coal FA (in the form of sodium silicate) and cationic cetyltrimethylammonium bromide (CTAB) surfactants as the structuredirecting agents. On the basis of the data obtained from the TG analysis, thermal behaviour of FA-based MCM-41 mesoporous materials was assessed. This study has established the range of temperatures corresponding to the desorption of water, decomposition of the surfactant and condensation of silanol, thereby making the overall quality assessment of FA-based MCM-41 mesoporous materials.

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Section: Fa-based Mcm-41mentioning

confidence: 99%

Section: Fa-based Mcm-41mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermogravimetry applied to characterization of fly ash-based MCM-41 mesoporous materials

Majchrzak‐Kucęba

2011

J Therm Anal Calorim

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“…Recently preparation of mesoporous materials from natural waste such as coal fly ash have been reported [8 -11]. Limited reports have addressed in converting coal bottom ash into mesoporous silica [7,12]. Chandrasekar et al [12] synthesized mesoporous MCM-41, SBA-15 and SBA-16 from supernatant derived from coal bottom ash.…”

mentioning

confidence: 99%

Synthesis and Characterization of Mesoporous Silica McM-41 and Sba-15 From Power Plant Bottom Ash

Rahman

Rasid

Hassan

et al. 2016

MJAS

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Silica was extracted from power plant bottom ash by alkali fusion method and used to synthesize MCM-41 and SBA-15. As comparison, MCM-41 and SBA-15 were synthesized by using tetraethylorthosilicate (TEOS) as pure silica source. All synthesized MCM-41 and SBA-15 were characterized using X-ray Diffraction (XRD) and nitrogen adsorption to determine the formation of hexagonal pores, Field Emission Scanning Electron Micrograph (FESEM) was used to observe their morphology while Fourier Transform Infrared Spectroscopy (FTIR) was used to obtain the functional group and removal of surfactant after calcinations. XRD results confirmed bottom ash MCM-41 (BA MCM-41), pure SBA-15 (PSBA-15) and bottom ash SBA-15 (BA SBA-15) have well-ordered mesostructures. N 2 adsorption of pure MCM-41 (PMCM-41), PSBA-15 and BA SBA-15 indicated type IV isotherm while BA MCM-41 exhibit type III isotherm. According to FESEM analyses, the particle morphology of bottom ash mesoporous silica was different from those prepared using pure chemical. Morphology of PMCM-41 and PSBA-15 showed rod like particle while BA MCM-41 and BA SBA-15 exhibited agglomerated particle. PMCM-41, PSBA-15 and BA SBA-15 shows ordered hexagonal, high surface area and narrow pore distribution. Keywords: mesoporous silica, MCM-41, SBA-15Abstrak Silika telah diekstrak daripada abu bawah loji janakuasa melalui kaedah gabungan alkali dan digunakan untuk sintesis MCM-41 dan SBA-15. Sebagai perbandingan, MCM-41 dan SBA-15 telah disintesis dengan menggunakan tetraetilortosilika (TEOS) sebagai sumber silika tulen. Semua MCM-41 dan SBA-15 yang telah disintesis dicirikan menggunakan kaedah pembelauan Sinar X (XRD) dan penjerapan nitrogen untuk menentukan pembentukan liang heksagon, mikroskopi elektron pengimbasan pancaran medan (FESEM) digunakan untuk memerhati morfologi manakala Spektroskopi Inframerah Tranformasi Fourier (FTIR) digunakan untuk mengenalpasti kumpulan berfungsi dan penyingkiran surfaktan selepas pengkalsinan. Keputusan XRD membuktikan debu MCM-41 (BA MCM-41), SBA-15 tulen (PSBA-15) dan debu SBA-15 (BA SBA-15) mempunyai mesostruktur yang teratur. Penjerapan N 2 oleh MCM-41 (PMCM-41), PSBA-15 dan BA SBA-15 menunjukkan isoterma jenis IV manakala isoterma jenis III bagi BA MCM-41. Berdasarkan analisis FESEM, morfologi zarah silika mesoporos daripada debu bawah loji janakuasa adalah berlainan berbanding yang disediakan menggunakan bahan kimia tulen. Morfologi PMCM-41 dan PSBA-15 menunjukkan zarah jenis rod manakala BA MCM-41 dan BA SBA-15 wujud sebagai zarah bercampur. PMCM-41, PSBA-15 dan BA SBA-15 mempunyai struktur heksagon yang seragam, luas permukaan yang tinggi dan taburan liang yang kecil. Kata kunci: silika mesoporos, MCM-41, SBA-15 ISSN -2506Nurul Barakah et al: SYNTHESIS AND CHARACTERIZATION OF MESOPOROUS SILICA MCM-41 AND SBA-15 FROM POWER PLANT BOTTOM ASH 540 Introduction In year 1990s, the researchers of Mobil Corporation discovered MCM-41 molecular sieves can be synthesized by using an inorganic silicate species and organic template [1]. Tetraethylor...

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Lanthanide (Eu³⁺, Tb³⁺) Centered Mesoporous Hybrids with 1,3‐Diphenyl‐1,3‐Propanepione Covalently Linking SBA‐15 (SBA‐16) and Poly(methylacrylic acid)

Yan

2010

Chemistry An Asian Journal

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1,3-Diphenyl-1,3-propanepione (DBM)-functionalized SBA-15 and SBA-16 mesoporous hybrid materials (DBM-SBA-15 and DBM-SBA-16) are synthesized by co-condensation of modified 1,3-diphenyl-1,3-propanepione (DBM-Si) and tetraethoxysilane (TEOS) in the presence of Pluronic P123 and Pluronic F127 as a template, respectively. The as-synthesized mesoporous hybrid material DBM-SBA-15 and DBM-SBA-16 are used as the first precursor, and the second precursor poly(methylacrylic acid) (PMAA) is synthesized through the addition polymerization reaction of the monomer methacrylic acid. These precursors then coordinate to lanthanide ions simultaneously, and the final mesoporous polymeric hybrid materials Ln(DBM-SBA-15)(3)PMAA and Ln(DBM-SBA-16)(3)PMAA (Ln=Eu, Tb) are obtained by a sol-gel process. For comparison, binary lanthanide SBA-15 and SBA-16 mesoporous hybrid materials (denoted as Ln(DBM-SBA-15)(3) and Ln(DBM-SBA-16)(3)) are also synthesized. The luminescence properties of these resulting materials are characterized in detail, and the results reveal that ternary lanthanide mesoporous polymeric hybrid materials present stronger luminescence intensities, longer lifetimes, and higher luminescence quantum efficiencies than the binary lanthanide mesoporous hybrid materials. This indicates that the introduction of the organic polymer chain is a benefit for the luminescence properties of the overall hybrid system. In addition, the SBA-15 mesoporous hybrids show an overall increase in luminescence lifetime and quantum efficiency compared with SBA-16 mesoporous hybrids, indicating that SBA-15 is a better host material for the lanthanide complex than mesoporous silica SBA-16.

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Synthesis of hexagonal and cubic mesoporous silica using power plant bottom ash

Cited by 80 publications

References 31 publications

Thermogravimetry applied to characterization of fly ash-based MCM-41 mesoporous materials

Thermogravimetry applied to characterization of fly ash-based MCM-41 mesoporous materials

Synthesis and Characterization of Mesoporous Silica McM-41 and Sba-15 From Power Plant Bottom Ash

Lanthanide (Eu³⁺, Tb³⁺) Centered Mesoporous Hybrids with 1,3‐Diphenyl‐1,3‐Propanepione Covalently Linking SBA‐15 (SBA‐16) and Poly(methylacrylic acid)

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Synthesis of hexagonal and cubic mesoporous silica using power plant bottom ash

Cited by 80 publications

References 31 publications

Thermogravimetry applied to characterization of fly ash-based MCM-41 mesoporous materials

Thermogravimetry applied to characterization of fly ash-based MCM-41 mesoporous materials

Synthesis and Characterization of Mesoporous Silica McM-41 and Sba-15 From Power Plant Bottom Ash

Lanthanide (Eu3+, Tb3+) Centered Mesoporous Hybrids with 1,3‐Diphenyl‐1,3‐Propanepione Covalently Linking SBA‐15 (SBA‐16) and Poly(methylacrylic acid)

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Lanthanide (Eu³⁺, Tb³⁺) Centered Mesoporous Hybrids with 1,3‐Diphenyl‐1,3‐Propanepione Covalently Linking SBA‐15 (SBA‐16) and Poly(methylacrylic acid)