Preparation, characterization and adsorption evaluation of spherical mesoporous Al-MCM-41 from coal fly ash

Zhou, Chunyu; Gao, Qiang; Luo, Wei; Zhou, Qi; Wang, Hongquan; Yan, Chunjie; Duan, Ping

doi:10.1016/j.jtice.2015.02.014

Cited by 102 publications

(61 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the low XRD pattern of Al‐MCM‐41, the intense peak at 1.88° indexed as (100) plane of 2D hexagonal mesoporous structures with low Si/Al ratio, which is broadened up to 2 θ = 4° due to planes of (110) and (200) because of substituting of Si 4+ by Al 3+ . Moreover, the high angle XRD pattern of Al‐MCM‐41 shows a broad peak at 21.52° which is consistent with its amorphous structure . Modification of Al‐MCM‐41 surface with the ILBr dicationic ionic liquid resulted to a broader peak for 100 plane that also shifted to a higher angle (3.16°), and indicative of less ordered hexagonal mesoporous structure compared to pure Al‐MCM‐41 .…”

Section: Resultssupporting

confidence: 55%

Organic–inorganic hybrid of anchored dicationic ionic liquid on Al‐MCM‐41‐phosphovanadomolybdate toward selective oxidation of benzene to phenol

Taheri

Ghiaci

Moheb

et al. 2019

Applied Organom Chemis

View full text Add to dashboard Cite

A phosphovanadomolybdate hybridized with an anchored dicationic ionic liquid on Al-MCM-41 was prepared through the anion exchange and characterized by 1 H and 13 C NMR, FTIR, UV-Vis, XRD, XPS, TGA, TEM, FESEM, ICP-OES and BET techniques. The obtained data demonstrated that the composite is a porous material with the high surface area and also having a large pore volume which are 405 m 2 g −1 and 0.616 cm 3 g −1 respectively. The prepared composite has shown an acceptable catalytic activity for converting benzene selectively to phenol with hydrogen peroxide as eco-friendly oxidant.Under the optimized reaction conditions, the hybrid catalyst resulted in phenol yield of 14.8% with 100% selectivity and a TOF value of 20.0 h −1 . The catalyst also revealed a desired recovery and reusability. The efficient performance of the composite is related to the textural and polyoxometalate properties.

show abstract

Section: Resultssupporting

confidence: 55%

Organic–inorganic hybrid of anchored dicationic ionic liquid on Al‐MCM‐41‐phosphovanadomolybdate toward selective oxidation of benzene to phenol

Taheri

Ghiaci

Moheb

et al. 2019

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…According to SEM morphology analysis, the zeolite mesopores are caused by intercrystalline voids and intracrystalline mesopores in the crystal. There is a certain difference between the calculated area of the external surface area and the specific surface area, which further proves that the micropores and the mesopores coexist in the obtained zeolite [39]. The experimental results show that it has good consistency with typical NaP zeolite [40,41].…”

Section: Sem Results Analysismentioning

confidence: 66%

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Zhang

Zhao

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

In view of the current and urgent environmental protection needs, the use of industrial solid waste in China’s Ningdong is becoming more and more important. In this paper, NaP zeolite with good physical properties is synthesized by using coal gasification coarse slag (CGCS) as the raw material, without the addition of a silicon and aluminum source, without the addition of a template agent, and without high-temperature calcination. Add a small amount of NaOH and deionized water to the CGCS to adjust the molar ratio to SiO2:Al2O3:Na2O:H2O = 5.2:1.0:5.0:100. The effects of aging time, crystallization temperature, and crystallization time parameters on synthetic zeolite were studied. The raw materials and the obtained zeolite were tested by XRF, XRD, SEM, FT-IR, TG-DSC, BET, and other technologies. The results show that the specific surface area of the synthesized NaP zeolite can reach 161.06 m2/g, which has the characteristics of large specific surface area, regular morphology, and high crystallinity. We obtained NaP zeolite through a simple and low-cost synthesis method. The synthesized NaP zeolite was used to simulate the removal of ammonia nitrogen in wastewater, and the optimal removal rate was 92.67%. Among them, Na+ plays an important role in the synthesis of NaP zeolite and ion exchange with NH4+. Our research provides new ideas for solving the large-scale accumulation of CGCS and treating ammonia nitrogen in industrial wastewater. Thus, it is a promising green environmental protection and “treating waste by waste” route.

show abstract

“…TEM images of TNTs, HTNTs, and OTNTs. Wang et al, Aerosol and Air Quality Research, 15: 2688-2699, 20152694 As expected, the SSA ranged from 200 to 400 m 2 g -1 (Lee et al, 2008). The SSA and the pore volume decreased after the modification process.…”

Section: Resultsmentioning

confidence: 52%

“…SEM images of TNTs, HTNTs, and OTNTs. Wang et al, Aerosol and Air Quality Research, 15: 2688-2699, 20152693 Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sorption of Volatile Organic Compounds on Organic Substance-Modified Titanate Nanotubes

Wang

Peng

Chao

2015

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

This study investigates the removal of volatile organic compounds (VOCs) from the air through the use of organic substance-modified titanate nanotubes (TNTs). The TNTs were derived from TiO 2 through a hydrothermal method, and were modified using hexadecyltrimethylammonium bromide and octadecyltrichlorosilane (OTS) to change the surface hydrophilicity to hydrophobicity. The properties of the TNT and modified TNT were characterized through scanning electron microscopy , transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, contact angle measurements, and nitrogen adsorption-desorption isotherms. The fabricated adsorbents were used to remove the VOCs of toluene, ethylbenzene 1,1,2-trichloroethane, and tetrachloroethene in the air. The adsorption amounts of the VOCs were estimated using the Thomas equation. The results revealed that adsorbent modification raised the adsorption capacities of these VOCs, which also grew with increasing surface hydrophobicity. The aromatic compounds accumulated easily in the pores to generate relatively high adsorption amounts. VOCs adsorbed on the TNT surface or partitioned into the organic substance on TNTs. The adsorption amounts of VOCs on the OTSmodified TNTs were higher than those on commercial activated carbon. The results imply that organic substance-modified TNTs can effectively remove VOCs in the air and become excellent adsorbents.

show abstract

Preparation, characterization and adsorption evaluation of spherical mesoporous Al-MCM-41 from coal fly ash

Cited by 102 publications

References 48 publications

Organic–inorganic hybrid of anchored dicationic ionic liquid on Al‐MCM‐41‐phosphovanadomolybdate toward selective oxidation of benzene to phenol

Organic–inorganic hybrid of anchored dicationic ionic liquid on Al‐MCM‐41‐phosphovanadomolybdate toward selective oxidation of benzene to phenol

Green Synthesis Method and Application of NaP Zeolite Prepared by Coal Gasification Coarse Slag from Ningdong, China

Sorption of Volatile Organic Compounds on Organic Substance-Modified Titanate Nanotubes

Contact Info

Product

Resources

About