ZIF-67 blended PVDF membrane for improved Congo red removal and antifouling properties: A correlation establishment between morphological features and ultra-filtration parameters

Sharma, U. C.; Pandey, Rohit; Basu, Sudeshna; Saravanan, Pichiah

doi:10.1016/j.chemosphere.2023.138075

Cited by 19 publications

(11 citation statements)

References 71 publications

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“…Furthermore, by maintaining the unaltered PVDF structure, the incorporation of ZIF-67 in PVDF was confirmed through the presence of Co–N and C=N stretching vibrations, and their intensities were increased with the increase in ZIF-67 loading. The obtained data were confirmed by comparing with the already published data , and is reported in Table S2. Surface area and pore size distribution of ZIF-67 was obtained using BET analysis as shown in Figure S3a,b.…”

Section: Results and Discussionmentioning

confidence: 99%

“…N 2 adsorption–desorption isotherm represents the type I sorption as illustrated in Figure S3a. BET surface area of ZIF-67 was found to be 1737.37 m 2 /g with micropore volume of 0.048 cm 3 /g, which are near to the reported value . The existence of a microporous structure is responsible for the rapid adsorption at low relative pressure ( P / P 0 ).…”

Section: Results and Discussionmentioning

confidence: 99%

“…Remarkably, the Ti 3 C 2 T x sensor with the MMM filter displayed a lesser sensitivity to temperature variations, suggesting a protective effect against temperature-induced impacts on the sensor response. The lesser sensitivity of the Ti 3 C 2 T x sensor with the ZIF-67-incorporated PVDF MMM is attributed to ZIF-67’s high thermal resistance and structural stability. , This composite material acts as a thermal buffer, reducing the impact of temperature fluctuations on the sensor . Additionally, PVDF in the MMM filter provides overall insulation and protection, leveraging its excellent thermal and chemical stability for increased sensor robustness under diverse environmental conditions.…”

Section: Results and Discussionmentioning

confidence: 99%

“…BET surface area of ZIF-67 was found to be 1737.37 m 2 /g with micropore volume of 0.048 cm 3 /g, which are near to the reported value. 29 The existence of a microporous structure is responsible for the rapid adsorption at low relative pressure (P/P 0 ). The average pore diameter of 2.2 nm was obtained for ZIF-67.…”

Section: ■ Characterizationsmentioning

confidence: 99%

“…27,36 This composite material acts as a thermal buffer, reducing the impact of temperature fluctuations on the sensor. 29 Additionally, PVDF in the MMM filter provides overall insulation and protection, leveraging its excellent thermal and chemical stability for increased sensor robustness under diverse environmental conditions. This observation underscores the potential of the MMM filter in enhancing the robustness of the Ti 3 C 2 T x sensor under varying temperature conditions.…”

Section: ■ Characterizationsmentioning

confidence: 99%

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Selective Detection of NH₃ Gas by Ti₃C₂T_x Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Arkoti,

Pal

2024

ACS Sens.

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In the realm of NH 3 gas-sensing applications, the electrically conductive nature of Ti 3 C 2 T x MXene, adorned with surface terminations such as −O and −OH groups, renders it a compelling material. However, the inherent challenges of atmospheric instability and selectivity in the presence of gas mixtures have prompted the exploration of innovative solutions. This work introduces a strategic solution through the deposition of a mixed-matrix membrane (MMM) composed of poly(vinylidene fluoride) (PVDF) as the matrix and zeolitic imidazolate framework-67 (ZIF-67) as the filler. This composite membrane acts as a selective filter, permitting the passage of a specific gas, namely NH 3 . Leveraging the hydrophobic and chemically inert nature of PVDF, the MMM enhances the atmospheric stability of Ti 3 C 2 T x by impeding water molecules from interacting with the MXene. Furthermore, ZIF-67 is selective to NH 3 gas via acid−base interactions within the zeolite group and selective pore size. The Ti 3 C 2 T x sensor embedded in the MMM filter exhibits a modest 1.3% change in the sensing response to 25 ppm of NH 3 gas compared to the response without the filter. This result underscores the filter's effectiveness in conferring selectivity and diffusivity, particularly at 35% relative humidity (RH) and 25 °C. Crucially, the hydrophobic attributes of PVDF impart heightened stability to the Ti 3 C 2 T x sensor even amidst varying RH conditions. These results not only demonstrate effective NH 3 detection but also highlight the sensor's adaptability to diverse environmental conditions, offering promising prospects for practical applications.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Characterizationsmentioning

confidence: 99%

Section: ■ Characterizationsmentioning

confidence: 99%

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Selective Detection of NH₃ Gas by Ti₃C₂T_x Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Arkoti,

Pal

2024

ACS Sens.

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Enhanced permeability and antifouling properties of carboxylated polysulfone/quaternized polyimide blend ultrafiltration membrane

Wang,

Yin,

Chen

et al. 2024

J of Applied Polymer Sci

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The intricate interplay between chemical composition and the incorporation of functional fillers plays a pivotal role in shaping the structural attributes and separation efficacy of mixed matrix ultrafiltration membranes. In this work, we report the utilization of a novel organic filler of hydrophilic modified polyimide particles (PI‐SO3) for the first time in the preparation of mixed matrix ultrafiltration membranes. A series of ultrafiltration membranes were fabricated using polysulfone as the matrix material and PI‐SO3 as the additive. The addition of PI‐SO3 to the mixed matrix membrane effectively enhanced both water flux and antifouling ability. The ultrafiltration membrane with 0.2% particle content exhibited the highest pure water flux at 535.5 L h−1 m−2, owing to the synergistic regulation of pore structures and surface hydrophilicity. The ultrafiltration membrane with 0.5% PI‐SO3 particles demonstrated the highest flux recovery rate at 76.8%, attributed to the superior hydrophilicity displayed by the added particles within the ultrafiltration membrane. The increased particles content correlated with improved hydrophilicity on the membrane surface, resulting in enhanced antifouling performance. The hydrophilic modified particles effectively regulated pore structures, surface hydrophilicity, and surface charge, ultimately enhancing the performance of mixed matrix ultrafiltration membranes for wastewater purification. Therefore, the use of modified polyimide particles as fillers introduces an innovative method to economically enhance ultrafiltration membranes, providing a potential solution to mitigate the economic costs associated with trade‐off effects during the modification process.

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Investigation of the effect of permeation and antifouling characteristics of hybrid poly(vinylidene fluoride) membranes tailored with ZIF‐67 metal–organic frameworks

Rameesha,

Rana,

Nagendran

2024

Journal of Polymer Science

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Herein the ZIF‐67, a hydrophilic cobalt‐based zeolitic imidazolate framework is synthesized and incorporated with a poly(vinylidene fluoride) (PVDF) to fabricate hybrid ultrafiltration membranes by phase inversion method. The characteristics of PVDF/ZIF‐67 membranes are examined using different analytical techniques such as Fourier‐transform infrared spectroscopy, X‐ray diffractometer, scanning electron microscope, atomic force microscope, and contact angle analysis. The membrane performance is probed using pure water flux (PWF), bovine serum albumin (BSA), and humic acid (HA) rejection. The maximum water flux of 162.5 Lm2 h−1 with BSA and HA rejection of 97% and 98.2%, respectively, exhibited by 1.5 wt% ZIF‐67. The contact angle value is reduced from 83.5 to 58.6° indicating the increase in hydrophilic nature of PVDF membranes by the addition of ZIF‐67. The presence of ZIF‐67 in the PVDF membrane matrix showed outstanding anti‐bacterial properties against Escherichia coli and Staphylococcus aureus. Overall, the PVDF/ZIF‐67 ultrafiltration membranes demonstrate the potential for water treatment applications.

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ZIF-67 blended PVDF membrane for improved Congo red removal and antifouling properties: A correlation establishment between morphological features and ultra-filtration parameters

Cited by 19 publications

References 71 publications

Selective Detection of NH₃ Gas by Ti₃C₂T_x Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Selective Detection of NH₃ Gas by Ti₃C₂T_x Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Enhanced permeability and antifouling properties of carboxylated polysulfone/quaternized polyimide blend ultrafiltration membrane

Investigation of the effect of permeation and antifouling characteristics of hybrid poly(vinylidene fluoride) membranes tailored with ZIF‐67 metal–organic frameworks

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ZIF-67 blended PVDF membrane for improved Congo red removal and antifouling properties: A correlation establishment between morphological features and ultra-filtration parameters

Cited by 19 publications

References 71 publications

Selective Detection of NH3 Gas by Ti3C2Tx Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Selective Detection of NH3 Gas by Ti3C2Tx Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Enhanced permeability and antifouling properties of carboxylated polysulfone/quaternized polyimide blend ultrafiltration membrane

Investigation of the effect of permeation and antifouling characteristics of hybrid poly(vinylidene fluoride) membranes tailored with ZIF‐67 metal–organic frameworks

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Product

Resources

About

Selective Detection of NH₃ Gas by Ti₃C₂T_x Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature

Selective Detection of NH₃ Gas by Ti₃C₂T_x Sensors with the PVDF-ZIF-67 Overlayer at Room Temperature