Piezocatalytic performance enhancement using the sandwich structure of a PVDF-HFP/graphene film

Liu, Ya; Tong, Wangshu; Song, Wanting; Cao, Tingting; Liu, Yu-Lun; Wang, Lingchao; Wang, Wenwen; Zhang, Yihe

doi:10.1039/d2ta08651d

Cited by 16 publications

(4 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effectively addresses the challenges of charge neutralization, enabling continuous enhancement in demulsification and antifouling capabilities through electrorepulsion. What’s more, some piezoelectric materials can also release electrons under stimulations to catalyze redox reactions of substrates (e.g., water, oxygen) to produce reactive oxygen species (ROS), which has been proven effective in degrading organic pollutants and further enhance the membrane’s antifouling capabilities. , Furthermore, this entire process eliminates the need for introducing charged polymers or continuous power input to maintain the material’s charge, resulting in a substantial reduction in energy consumption. Inspired by these impressive characteristics, we envision a novel hybridization strategy that integrates piezoelectric conversion and catalytic degradation functions into piezoelectric membranes, aiming to achieve enhanced demulsification and antifouling performance during the long-term emulsion separation processes.…”

Section: Introductionmentioning

confidence: 99%

Boosting Demulsification and Antifouling Capacity of Membranes via an Enhanced Piezoelectric Effect for Sustaining Emulsion Separation

Yan,

Zhou,

Zhou

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

Traditional superwettable membranes for demulsification of oil/water emulsions could not maintain their separation performance for long because of low demulsification capacity and surface fouling during practical applications. A charging membrane could repel the contaminants for a while, the charge of which would gradually be neutralized during the separation progress. Here, a superhydrophilic piezoelectric membrane (SPM) with sustained demulsification and antifouling capacity is proposed for achieving prolonged emulsion separation, which is capable of converting inherent pulse hydraulic filtration pressure into pulse voltage. A pulse voltage up to −7.6 V is generated to intercept the oil by expediting the deformation and coalescence of emulsified oil droplets, realizing the demulsification. Furthermore, it repels negatively charged oil droplets, avoiding membrane fouling. Additionally, any organic foulants adhering to the membrane undergo degradation facilitated by the generated reactive oxygen species. The separation data demonstrate a 98.85% efficiency with a flux decline ratio below 14% during a 2 h separation duration and a nearly 100% flux recovery of SPM. This research opens new avenues in membrane separation, environmental remediation, etc.

show abstract

Section: Introductionmentioning

confidence: 99%

Boosting Demulsification and Antifouling Capacity of Membranes via an Enhanced Piezoelectric Effect for Sustaining Emulsion Separation

Yan,

Zhou,

Zhou

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…At present, piezoelectric materials are mainly divided into three categories: piezoelectric single crystals, polycrystalline piezoelectric ceramics, and polymer piezoelectric materials. [15][16][17] Nevertheless, the current piezoelectric materials have some problems, such as high production cost, serious environmental pollution, and poor biocompatibility, which greatly limits the development of piezoelectric catalytic technology. Cellulose-based materials, as a kind of biological material that exists in nature in large quantities, have the characteristics of rich raw materials, renewability, good biocompatibility, and excellent mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineered Microcrystalline Cellulose for Enhanced Cocatalyst‐Free Piezo‐Catalytic H₂ Production

Zhang,

Sun,

et al. 2023

Small

View full text Add to dashboard Cite

Mechanical energy driven piezocatalytic hydrogen (H2) production is a promising way to solve the energy crisis . But limited by the slow separation and transfer efficiency of piezoelectric charges generated on the surface of piezocatalysts , the piezocatalytic performance is still not satisfactory. Here, defect engineering is first used to optimize the piezocatalytic performance of microcrystalline cellulose (MCC). The piezocatalytic H2 production rate of MCC with the optimal defect concentration can reach up to 84.47 µmol g−1 h−1 under ultrasonic vibration without any co‐catalyst, which is ≈3.74 times higher than that of the pure MCC (22.65 µmol g−1 h−1). The enhanced H2 production rate by piezoelectric catalysis is mainly due to the introduction of defect engineering on MCC, which disorders the symmetry of MCC crystal structure, improves the electrical conductivity of the material, and accelerates the separation and transfer efficiency of piezoelectric charges. Moreover, the piezocatalytic H2 production rate of MCC with the optimal defect concentration can still reach up to 93.61 µmol g−1 h−1 in natural seawater, showingits commendable practicability. This study presents a novel view for designing marvelous‐performance biomass piezocatalysts through defect engineering, which can efficiently convert mechanical energy into chemical energy .

show abstract

“…In recent years, there has been a significant increase in interest in the study of piezoelectric polymer composites based on PVDF for water purification purposes [20]. Various functional materials, such as PVDF-HFP@rGO [21], PVDF/BaTiO 3 [22], PVDF/MoS 2 [23], and PVDF/Cu 3 B 2 O 6 [24], have been used as fillers for the PVDF matrix. For instance, in a study [25], Fe 3 O 4 /PVDF membranes were synthesized using non-solvent-induced phase inversion and utilized for Fenton catalytic oxidation of Methylene Blue.…”

Section: Introductionmentioning

confidence: 99%

Combination NIPS/TIPS Synthesis of α-Fe2O3 and α/γ-Fe2O3 Doped PVDF Composite for Efficient Piezocatalytic Degradation of Rhodamine B

Magomedova,

Rabadanova,

Shuaibov

et al. 2023

Molecules

View full text Add to dashboard Cite

Highly porous membranes based on polyvinylidene fluoride (PVDF) with the addition of nanoscale particles of non-magnetic and magnetic iron oxides were synthesized using a combined method of non-solvent induced phase separation (NIPS) and thermo-induced phase separation (TIPS) based on the technique developed by Dr. Blade. The obtained membranes were characterized using SEM, EDS, XRD, IR, diffuse reflectance spectroscopy, and fluorescent microscopy. It was shown that the membranes possessed a high fraction of electroactive phase, which increased up to a maximum of 96% with the addition of 2 wt% of α-Fe2O3 and α/γ-Fe2O3 nanoparticles. It was demonstrated that doping PVDF with nanoparticles contributed to the reduction of pore size in the membrane. All membranes exhibited piezocatalytic activity in the degradation of Rhodamine B. The degree of degradation increased from 69% when using pure PVDF membrane to 90% when using the composite membrane. The nature of the additive did not affect the piezocatalytic activity. It was determined that the main reactive species responsible for the degradation of Rhodamine B were •OH and •O2−. It was also shown that under piezocatalytic conditions, composite membranes generated a piezopotential of approximately 2.5 V.

show abstract

Piezocatalytic performance enhancement using the sandwich structure of a PVDF-HFP/graphene film

Abstract: A PVDF-HFP/graphene piezocatalytic film with a sandwich structure was prepared. Under the piezoelectric field of PVDF-HFP, the exposed graphene on the surface of the sandwich film provided the charges to react with the pollutants.

Cited by 16 publications

References 51 publications

Boosting Demulsification and Antifouling Capacity of Membranes via an Enhanced Piezoelectric Effect for Sustaining Emulsion Separation

Boosting Demulsification and Antifouling Capacity of Membranes via an Enhanced Piezoelectric Effect for Sustaining Emulsion Separation

Defect Engineered Microcrystalline Cellulose for Enhanced Cocatalyst‐Free Piezo‐Catalytic H₂ Production

Combination NIPS/TIPS Synthesis of α-Fe2O3 and α/γ-Fe2O3 Doped PVDF Composite for Efficient Piezocatalytic Degradation of Rhodamine B

Contact Info

Product

Resources

About

Piezocatalytic performance enhancement using the sandwich structure of a PVDF-HFP/graphene film

Abstract: A PVDF-HFP/graphene piezocatalytic film with a sandwich structure was prepared. Under the piezoelectric field of PVDF-HFP, the exposed graphene on the surface of the sandwich film provided the charges to react with the pollutants.

Cited by 16 publications

References 51 publications

Boosting Demulsification and Antifouling Capacity of Membranes via an Enhanced Piezoelectric Effect for Sustaining Emulsion Separation

Boosting Demulsification and Antifouling Capacity of Membranes via an Enhanced Piezoelectric Effect for Sustaining Emulsion Separation

Defect Engineered Microcrystalline Cellulose for Enhanced Cocatalyst‐Free Piezo‐Catalytic H2 Production

Combination NIPS/TIPS Synthesis of α-Fe2O3 and α/γ-Fe2O3 Doped PVDF Composite for Efficient Piezocatalytic Degradation of Rhodamine B

Contact Info

Product

Resources

About

Defect Engineered Microcrystalline Cellulose for Enhanced Cocatalyst‐Free Piezo‐Catalytic H₂ Production