Time dependent solid-state 13C NMR study on alkaline hydrolysis of polyacrylonitrile hollow fiber ultrafiltration membranes

Choi, Yong Hun; Choi, Chang Min; Choi, Do Young; Paik, Younkee; Park, Byung Jae; Joo, Young; Kim, Nam Joon

doi:10.1016/j.memsci.2011.01.021

Cited by 33 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unexpected high rejection of dye at pH 10.0 was obviously attributed to the strong electronic repulsion between the negatively charged dye and the negatively charged membrane interface. It was necessary to mention that the FR-IR analysis of PAN membrane has verified the presence of -CN-and -CO-group on membrane interface, and the two groups came from the product of the hydrolysis of -CN group [33]. In the presence of TiO 2 , the possible mechanism of the decrease in dye rejection was proposed in Fig.…”

Section: Effect Of Tio 2 Deposit On Dye Rejectionmentioning

confidence: 99%

Influence of azo dye-TiO2 interactions on the filtration performance in a hybrid photocatalysis/ultrafiltration process

Zhang

Wang

Zhang

et al. 2013

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Effect Of Tio 2 Deposit On Dye Rejectionmentioning

confidence: 99%

Influence of azo dye-TiO2 interactions on the filtration performance in a hybrid photocatalysis/ultrafiltration process

Zhang

Wang

Zhang

et al. 2013

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…These images show continuous symmetrical sponge structures on the surfaces of all investigated PAN-based membranes, which is consistent with the results of the TIPS method − (Figure a). The hydrolysis occurs both at the surface and in bulk simultaneously, indicating that sufficient amounts of NaOH solution flow inside the membrane to remove the SiO 2 shells. The surface of the blended SiO 2 @TiO 2 -PAN membrane exhibits only a small amount of unevenly distributed SiO 2 @TiO 2 nanoparticles compared to the TiO 2 -PAN membrane (Figure b and Figure S4).…”

Section: Resultsmentioning

confidence: 99%

The Photocatalysis-Enhanced TiO₂@HPAN Membrane with High TiO₂ Surface Content for Highly Effective Removal of Cationic Dyes

Zhang

Tian

et al. 2021

Langmuir

View full text Add to dashboard Cite

The elimination of dye pollutants from wastewater is a significant concern that has prompted extensive research into the development of highly efficient photocatalytic membranes. A novel method was proposed to prepare photocatalysis-enhanced poly(acrylonitrile-methyl acrylate) (PAN-based) membranes in this study. In detail, the blended membrane containing SiO 2 @TiO 2 nanoparticles with a shell−core structure was first prepared via thermal-induced phase separation. The SiO 2 nanoshells were dissolved, and the released TiO 2 nanoparticles migrated to the membrane surface during a simple hydrolysis process, which prevents the TiO 2 nanoparticles from directly contacting or interacting with the polymer matrix. The hydrogen bonds bind the exposed TiO 2 with the PAN membrane surface, resulting in the formation of the TiO 2 @HPAN hybrid membrane. The photocatalytic efficiency of the TiO 2 @HPAN membrane doubled compared with that of nonhydrolyzed membranes. In the presence of UV light, the hybrid membrane can degrade 99.8% of methylene blue solution in less than 2 h, compared to only 86.1% for the blended membranes. Further, the TiO 2 @HPAN membrane showed excellent photocatalytic activity for cationic dyes due to electrostatic attraction. Moreover, the high-flux recovery rate and recycling stability of the TiO 2 @HPAN membrane lead to an excellent antifouling property. The facile preparation method proposed in this work shows extraordinary potential for the development of highly efficient selective photocatalytic materials for cationic dyes to be used in wastewater treatment applications.

show abstract

“…3B , traces a and b) had similar signal peaks at 29.7, 122.1, and 176 ppm which can be assigned to the backbone carbon, ester carbonyl carbon, and cyano group carbon, respectively. 45 …”

Section: Resultsmentioning

confidence: 99%

Construction of a phosphate-rich polyacrylonitrile fiber surface microenvironment for efficient purification of crystal violet wastewater

Jin

Wang

et al. 2019

RSC Adv.

View full text Add to dashboard Cite

show abstract

Time dependent solid-state 13C NMR study on alkaline hydrolysis of polyacrylonitrile hollow fiber ultrafiltration membranes

Cited by 33 publications

References 23 publications

Influence of azo dye-TiO2 interactions on the filtration performance in a hybrid photocatalysis/ultrafiltration process

Influence of azo dye-TiO2 interactions on the filtration performance in a hybrid photocatalysis/ultrafiltration process

The Photocatalysis-Enhanced TiO₂@HPAN Membrane with High TiO₂ Surface Content for Highly Effective Removal of Cationic Dyes

Construction of a phosphate-rich polyacrylonitrile fiber surface microenvironment for efficient purification of crystal violet wastewater

Contact Info

Product

Resources

About

Time dependent solid-state 13C NMR study on alkaline hydrolysis of polyacrylonitrile hollow fiber ultrafiltration membranes

Cited by 33 publications

References 23 publications

Influence of azo dye-TiO2 interactions on the filtration performance in a hybrid photocatalysis/ultrafiltration process

Influence of azo dye-TiO2 interactions on the filtration performance in a hybrid photocatalysis/ultrafiltration process

The Photocatalysis-Enhanced TiO2@HPAN Membrane with High TiO2 Surface Content for Highly Effective Removal of Cationic Dyes

Construction of a phosphate-rich polyacrylonitrile fiber surface microenvironment for efficient purification of crystal violet wastewater

Contact Info

Product

Resources

About

The Photocatalysis-Enhanced TiO₂@HPAN Membrane with High TiO₂ Surface Content for Highly Effective Removal of Cationic Dyes