Photocatalytic membrane in water purification: is it stepping closer to be driven by visible light?

Shi, Yahui; Huang, Jinhui; Zeng, Guangming; Cheng, Wenjian; Hu, Jianglin

doi:10.1016/j.memsci.2019.04.078

Cited by 178 publications

(56 citation statements)

References 191 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the sphagnum is endowed with antibacterial property due to its cell secretions. [ 17 ] Analogously, the microstructure of CNTs‐PAA/CNMS composite membrane was in detail characterized. As displayed in Figure 2d, the CNMS layer (with thickness of ≈3.9 µm, Figure 2e) was closely packed on the surface of the CNTs‐PAA membrane (thickness about 0.5 µm, Figure S6, Supporting Information), which was like the cells in the sphagnum.…”

Section: Resultsmentioning

confidence: 99%

“…[ 16 ] Furthermore, the photocatalytic efficiency of the g‐C 3 N 4 sheet‐based membrane should be further promoted because of their larger bandgap. [ 17 ] Hence, it is highly anticipated to fully exploit the unmatched features of g‐C 3 N 4 to enhance the visible‐light sensitivity for realizing the functional integration of separation membrane.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sphagnum Inspired g‐C₃N₄ Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Yan

Chen

et al. 2021

Small

View full text Add to dashboard Cite

treatment technology an extremely tough task. [1] Currently, membrane separation technology has become the main channel to remediate the water environment attribu ting to its advantages, such as environ mental sustainability and energy saving. [2] Particularly, graphene oxide (GO) and carbon nanotubes (CNTs), have attracted comprehensive attention on constructing multifunctional separation membranes in the scientific field. [3] For one thing, they possess high surface areas that are ben eficial to achieve effective adsorption with watersoluble pollutants (dye molecules, bacteria, et al.). [4] For another, they can be taken as secondary reaction platforms for designing functional membranes through chemical crosslinking, interface assembly, and nanoparticle modification, which will enhance their capture ability for target compounds. [5] To date, the research on carbonbased membranes with versatility has brought inspiring achievements. For example, Liu and coworkers have designed a SiO 2 /GO composite mem brane through the modification of SiO 2 nanoparticle and eth ylenediamine. [6] It can purify the oilinwater (O/W) emulsion with the flux of 470 L m −2 h −1 and high retention capacity for dye molecules. Chen et al. have constructed a series of super hydrophilic CNTsbased composite membranes via hydrophilic Membrane separation is recognized as one of the most effective strategies to treat the complicated wastewater system for economic development. However, serious membrane fouling has restricted its further application. Inspired by sphagnum, a 0D/2D heterojunction composite membrane is engineered by depositing graphitic carbon nitride nano/microspheres (CNMS) with plentiful wrinkles onto the polyacrylic acid functionalized carbon nanotubes (CNTs-PAA) membrane through hydrogen bond force. Through coupling unique structure and chemistry properties, the CNTs-PAA/CNMS heterojunction membrane presents superhydrophilicity and underwater superoleophobicity. Furthermore, thanks to the J-type aggregates during the solvothermal process, it is provided with a smaller bandgap (1.77 eV) than the traditional graphitic carbon nitride (g-C 3 N 4) sheets-based membranes (2.4-2.8 eV). This feature endows the CNTs-PAA/CNMS membrane with superior visible-lightdriven self-cleaning ability, which can maintain its excellent emulsion separation (with a maximum flux of 5557 ± 331 L m −2 h −1 bar −1 and an efficiency of 98.5 ± 0.6%), photocatalytic degradation (with an efficiency of 99.7 ± 0.2%), and antibacterial (with an efficiency of ≈100%) ability even after cyclic experimental processes. The excellent self-cleaning performance of this all-in-one membrane represents its potential value for water purification.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sphagnum Inspired g‐C₃N₄ Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Yan

Chen

et al. 2021

Small

View full text Add to dashboard Cite

show abstract

“…To overcome mass transfer limitations, nanostructured materials are commonly used in both semiconductor and Fenton catalysis, since increasing the surface-to-volume ratio increases the reaction rate [ 16 ]. Moreover, surface modifications, supporting the nanoparticles onto membranes [ 17 , 18 ], doping with other elements [ 19 , 20 , 21 ], or targeted design of nanocomposites with magnetic properties have been evaluated to improve performance and enhance the separation stage [ 22 , 23 ]. Moreover, Fenton-based reactions have also generated interest in the field of micropollutant removal because these processes have shown good results even when the target compounds are present in low concentrations [ 11 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Reusable Fe3O4/SBA15 Nanocomposite as an Efficient Photo-Fenton Catalyst for the Removal of Sulfamethoxazole and Orange II

et al. 2021

View full text Add to dashboard Cite

Today, the presence of recalcitrant pollutants in wastewater, such as pharmaceuticals or other organic compounds, is one of the main obstacles to the widespread implementation of water reuse. In this context, the development of innovative processes for their removal becomes necessary to guarantee effluent quality. This work presents the potentiality of magnetic nanoparticles immobilized on SBA-15 mesoporous silica as Fenton and photo-Fenton catalysts under visible light irradiation. The influence of the characteristics of the compounds and nanoparticles on the removal yield was investigated. Once the key aspects of the reaction mechanism were analyzed, to evaluate the feasibility of this process, an azo dye (Orange II) and an antibiotic (sulfamethoxazole) were selected as main target compounds. The concentration of Orange II decreased below the detection limit after two hours of reaction, with mineralization values of 60%. In addition, repeated sequential experiments revealed the recoverability and stability of the nanoparticles in a small-scale reactor. The benchmarking of the obtained results showed a significant improvement of the process using visible light in terms of kinetic performance, comparing the results to the Fenton process conducted at dark. Reusability, yield and easy separation of the catalyst are its main advantages for the industrial application of this process.

show abstract

“…Membrane materials are commonly used to solve a lot of important problems ranging from separation and catalytic and electrochemical synthesis processes to water treatment and energy generation [1][2][3][4][5][6][7][8][9]. Homogeneous perfluorinated membranes of the Nafion type exhibit the best properties of all currently available ion-exchange membranes; however, their use in many processes is limited to high cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of Modification with Cesium Acid Salt of Phosphotungstic Acid on the Properties of Membranes Based on Grafted Sulfonated Polystyrene

Прихно

Yaroslavtsev

Голубенко

2019

Membr. Membr. Technol.

View full text Add to dashboard Cite

The possibility of modification of ion-exchange membranes with high pore and channel volumes and the effect of doping on the membrane properties have been studied. Hybrid membranes based on sulfonated polystyrene grafted onto polymethylpentene and cesium acid phosphotungstate have been synthesized by the in situ method. It has been shown that modification of these membranes leads to an increase in conductivity to 34.8 mS/cm at 25°С in contact with water. The chloride anion transport numbers for the original and modified membranes are about 4%.

show abstract

Photocatalytic membrane in water purification: is it stepping closer to be driven by visible light?

Cited by 178 publications

References 191 publications

Sphagnum Inspired g‐C₃N₄ Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Sphagnum Inspired g‐C₃N₄ Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Reusable Fe3O4/SBA15 Nanocomposite as an Efficient Photo-Fenton Catalyst for the Removal of Sulfamethoxazole and Orange II

Effect of Modification with Cesium Acid Salt of Phosphotungstic Acid on the Properties of Membranes Based on Grafted Sulfonated Polystyrene

Contact Info

Product

Resources

About

Photocatalytic membrane in water purification: is it stepping closer to be driven by visible light?

Cited by 178 publications

References 191 publications

Sphagnum Inspired g‐C3N4 Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Sphagnum Inspired g‐C3N4 Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Reusable Fe3O4/SBA15 Nanocomposite as an Efficient Photo-Fenton Catalyst for the Removal of Sulfamethoxazole and Orange II

Effect of Modification with Cesium Acid Salt of Phosphotungstic Acid on the Properties of Membranes Based on Grafted Sulfonated Polystyrene

Contact Info

Product

Resources

About

Sphagnum Inspired g‐C₃N₄ Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification

Sphagnum Inspired g‐C₃N₄ Nano/Microspheres with Smaller Bandgap in Heterojunction Membranes for Sunlight‐Driven Water Purification