Spreading-wetting method for highly reproducible tertiary growth of perfective bilayer TS-1 membranes

Liu, Xuguang; Liu, Yong; Xu, Lei; Zhang, Baoquan; Ma, Laibo

doi:10.1016/j.apsusc.2014.12.064

Cited by 12 publications

(20 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar monolayer zeolite membranes with the pinholes were commonly obtained using the conventional secondary growth method, as well as with the in situ growth method [13,39]. These pinholes, however, can certainly be covered by another zeolite layer obtained using a tertiary growth, typically producing a bilayer zeolite membrane [18]. It is worth noting that another fresh synthesis gel must be adopted for the tertiary growth, following the secondary growth (shown as route C in Figure 1).…”

Section: Crystal Structure and Morphologymentioning

confidence: 81%

“…The peaks at 2θ = 7.8 • , 8.8 • , 23.2 • , 23.8 • , 24.2 • , and 29.3 • indicated the formation of a typical TS-1 crystal structure. Those peaks resulted from types of crystal surfaces and illustrate the random orientation of the membrane [18,28]. The intensities increased with prolonged crystallization time, which was associated with more TS-1 crystal on the Al 2 O 3 support.…”

Section: Crystal Structure and Morphologymentioning

confidence: 95%

“…The spreading-wetting method was chosen to prepare a seeded support with a homemade SiO 2 /Al 2 O 3 disc support (SiO 2 content = 32 wt.% [30], outer diameter (OD) = 20 mm) [18,31]. Fresh synthesis gel of the TS-1 membrane was prepared following the protocol used in a previous study [32].…”

Section: Preparationmentioning

confidence: 99%

“…pinholes, however, can certainly be covered by another zeolite layer obtained using a tertiary growth, typically producing a bilayer zeolite membrane [18]. It is worth noting that another fresh synthesis gel must be adopted for the tertiary growth, following the secondary growth (shown as route C in Figure 1).…”

Section: Crystal Structure and Morphologymentioning

confidence: 99%

“…One notable example is inhibition of Al release from the α-Al 2 O 3 substrate, which further contributes to the enhancement of hydrophobic of pure silicate zeolite membranes. The bilayer structure is usually realized by tertiary growth of the membrane after the secondary growth with fresh synthesis gel [18,19]. Several drawbacks of this method were raised, including the renovation of the synthesis gel, messy preparation process, and low conversion to the expected zeolite membrane…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Facile Preparation of Bilayer Titanium Silicate (TS-1) Zeolite Membranes by Periodical Secondary Growth

Zhang¹,

Liu

et al. 2019

Coatings

Self Cite

View full text Add to dashboard Cite

A facile periodical secondary growth method, based on conventional secondary growth, is proposed to prepare bilayer TS-1 membranes. The novel periodical secondary growth consists of two or several periods, which involve three steps: the temperature is programmed to a desired crystallization temperature as the first stage, followed by holding for a certain duration, and finally cooling to room temperature. This periodical crystallization model enables a bilayer TS-1 membrane to be produced, while the conventional secondary growth method produces a monolayer TS-1 membrane. The bilayer TS-1 membrane exhibits a superior defect-free structure and hydrophobic properties, as illustrated by SEM, gas permeance, pore size distribution analysis, and water contact angle measurement. It displays an earlier desalination separation factor compared to the monolayer TS-1 membrane. This work demonstrates that the periodical secondary growth is an advanced approach for preparing a bilayer zeolite membrane with excellent properties.

show abstract

Section: Crystal Structure and Morphologymentioning

confidence: 81%

Section: Crystal Structure and Morphologymentioning

confidence: 95%

Section: Preparationmentioning

confidence: 99%

Section: Crystal Structure and Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Facile Preparation of Bilayer Titanium Silicate (TS-1) Zeolite Membranes by Periodical Secondary Growth

Zhang¹,

Liu

et al. 2019

Coatings

Self Cite

View full text Add to dashboard Cite

show abstract

Enhancing oil–water emulsion separation using improved styrene–acrylonitrile copolymer membrane: Experimental and thermodynamic study of the impact of solvent mixtures

Mohamadbeiki,

Ashtiani,

Karimi

et al. 2024

Polymers for Advanced Techs

View full text Add to dashboard Cite

This study investigated the fabrication of styrene–acrylonitrile copolymer (SAN) membrane using the nonsolvent‐induced phase separation (NIPS) method with a combination of solvents, namely N‐methyl‐2‐pyrrolidone (NMP) and dimethylformamide (DMF) and water as the nonsolvent. Since the impact of varying solvent ratios on SAN membrane performance remained unexplored, this study aimed to address this knowledge gap in the context of oil–water emulsion separation. Experimental results demonstrated that employing a solvent mixture, rather than a pure solvent, led to improved membrane performance. The primary objective of this work was to experimentally determine the optimal solvent ratio for enhancing SAN copolymer membrane performance. Additionally, the Flory–Huggins thermodynamic model was applied to investigate the possibility of predicting membrane binodal data. The thermodynamic analysis revealed a strong agreement between calculated and experimental binodal data, with an error of less than 3.8%. Notably, membranes produced with an equal solvent ratio exhibited the most hydrophilic properties, resulting in increased permeability. The permeate flux for distilled water reached 320 L/(m2 h) (LMH), and water contact angle of the membrane was 22°. Furthermore, mechanical resistance increased up to 50%. These results highlight the promising potential of fabricating SAN membrane using solvent mixtures for oil–water emulsion separation.

show abstract

Preparation of hierarchical TS-1 zeolite membrane via a dissolution–recrystallization process

et al. 2017

View full text Add to dashboard Cite

Spreading-wetting method for highly reproducible tertiary growth of perfective bilayer TS-1 membranes

Cited by 12 publications

References 41 publications

Facile Preparation of Bilayer Titanium Silicate (TS-1) Zeolite Membranes by Periodical Secondary Growth

Facile Preparation of Bilayer Titanium Silicate (TS-1) Zeolite Membranes by Periodical Secondary Growth

Enhancing oil–water emulsion separation using improved styrene–acrylonitrile copolymer membrane: Experimental and thermodynamic study of the impact of solvent mixtures

Preparation of hierarchical TS-1 zeolite membrane via a dissolution–recrystallization process

Contact Info

Product

Resources

About