Highly-efficient and salt-resistant CsxWO3@g-C3N4/PVDF fiber membranes for interfacial water evaporation, desalination, and sewage treatment

Tessema, Aster Aberra; Wu, Chang-Mou; Motora, Kebena Gebeyehu; Naseem, Saba

doi:10.1016/j.compscitech.2021.108865

Cited by 50 publications

(27 citation statements)

References 42 publications

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“…The energy-dispersive X-ray spectrum (EDS) presented in Figure b also confirms the existence of Cs, W, O, N, and C in the g-C 3 N 4 @Cs 0.33 WO 3 heterojunction, which shows the coexistence of Cs 0.33 WO 3 and g-C 3 N 4 . The crystal structures of the fabricated g-C 3 N 4 , Cs 0.33 WO 3 , and g-C 3 N 4 @Cs 0.33 WO 3 were investigated and reported in our previous study . The actual atomic and mass percentages of elements in the developed Cs 0.33 WO 3 @g-C 3 N 4 heterojunction (Figure b inset) were also almost the same as the theoretical mass and atomic percentages of each element used in the synthess, that confirms the successful fabrication of the heterojunction.…”

Section: Resultssupporting

confidence: 68%

“…First, g-C 3 N 4 was synthesized from melamine according to the method described in our previously published study. 25 Thereafter, the desired amount of g-C 3 N 4 was dissolved in 80 mL of ethanol and stirred for 1 h. Subsequently, 0.595 g of WCl 6 was added to the above solution, and the mixture was stirred until a homogeneous solution was obtained. Afterward, 0.13 g of CsOH•H 2 O was introduced and the mixture was stirred further for 10 min.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the design and selection of suitable materials to form heterostructures that can absorb full-spectrum solar light are necessary. Interestingly, tungsten bronze based materials M x WO 3 (0 < x < 1, M = Cs, Rb, K, Na, Li) are suitable candidates for this purpose due to their excellent NIR and UV light absorption properties. , In particular, Cs 0.33 WO 3 has attracted attention in various fields, such as water evaporation, photocatalysis, gas sensors, smart window coatings, and photothermal ablation cancer treatments, , due to its outstanding NIR light absorption property. The mixed-valence W 5+ and W 6+ as well as large oxygen vacancies make cesium tungsten oxide a suitable material for photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

“…The mixed-valence W 5+ and W 6+ as well as large oxygen vacancies make cesium tungsten oxide a suitable material for photocatalysis. Nevertheless, Cs 0.33 WO 3 suffers from Vis light absorption, which hinders its use as a solar light photocatalyst . Thus, it is mandatory to select materials that have excellent Vis light absorption properties to develop photocatalyst heterostructures to enable the efficient utilization of full-spectrum solar light …”

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Tessema

Motora

2022

ACS Omega

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This study facilitates the synthesis of a graphitic carbon nitride/cesium tungsten oxide (g-C3N4@Cs0.33WO3) heterojunction using a solvothermal method. The photocatalytic activities of the prepared samples were examined for the photodegradation of colorless antibiotics, namely tetracycline, enrofloxacin, and ciprofloxacin, as well as cationic and anionic dyes, such as methyl orange, rhodamine B, neutral red, and methylene blue, under full-spectrum solar light. We have purposely selected different kinds of wastewater pollutants of colorless antibiotics and cationic and anionic organic dyes to investigate the potential application of this heterojunction toward different groups of water pollutants. The results revealed that the g-C3N4@Cs0.33WO3 heterojunction showed an outstanding photocatalytic activity toward all the pollutants with concentrations of 20 ppm each at pH 3 by photocatalytically removing 97% of tetracycline within 3 h, 98% of enrofloxacin within 2 h, 97% of ciprofloxacin within 2.25 h, 98% of methylene blue in 1 h, 99% of rhodamine B within 2 h, 99% of neutral red in 1.25 h, and 95% of methyl orange in 2 h. These findings indicate that the developed photocatalyst possesses excellent photocatalytic properties toward seven different water pollutants that make it a universal photocatalyst. The developed g-C3N4@Cs0.33WO3 oxide heterojunction also presented a photocatalytic performance better than those of reported solar light active photocatalysts for photodegradation of rhodamine B and tetracycline. The efficient photocatalytic performance of the heterojunction can be ascribed to its extended light-absorbing ability, effective charge separation and fast charge transfer properties, and a high surface area. Moreover, an active species detection experiment also confirmed that superoxide radicals, hydroxyl radicals, and holes played significant roles in the photocatalysis of the organic dyes and tetracycline.

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Section: Resultssupporting

confidence: 68%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Tessema

Motora

2022

ACS Omega

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“…Solar energy is considered to be a renewable and clean energy. Photothermal conversion materials can convert light energy into heat energy, which have attracted extensive attention in various fields such as energy storage, − seawater desalination, − sewage treatment, − viscous oil adsorption, , and photocatalysis. , However, photothermal materials are easily polluted in the outdoor environment, and so, it is imperative to develop self-cleaning photothermal materials. The superamphiphobicity refers to the contact angles of water (WCA) and oil on the surface greater than 150°.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine/SiO₂ Hybrid Structured Superamphiphobic Fabrics with Good Photothermal Behavior

et al. 2022

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In recent years, photothermal materials that can convert light into heat energy have attracted extensive attention. In this work, we report a simple and effective approach to construct a self-cleaning photothermal superamphiphobic fabric. Dopamine (DA) can self-polymerize into polydopamine (PDA) and adhere to the surface of cotton fabric as a secondary reaction platform. Then, SiO 2 nanoparticles were in situ grown on the PDA@fabric surface by the sol−gel method. The PDA clusters can not only provide good photothermal conversion performance but also be integrated with SiO 2 to create micro−nano rough structures. Finally, the surface of SiO 2 was modified by the long chain of fluorosilane to decrease the fabric surface energy, resulting in superamphiphobicity. The contact angles of water, ethylene glycol, and pump oil on the modified fabric surface could reach 161.1, 158.1, and 142.2°, respectively, making the fabric resistant to contamination by water, common beverages, and oil. Due to the adhesion of the PDA layer, the strong binding force between the fabric and SiO 2 particles enabled the modified fabric to withstand various chemical and mechanical attacks, showing excellent mechanical robustness and harsh environmental stability. More importantly, the surface temperature of the modified fabric could be increased from 19.6 to 37.0 °C, which is close to the human body temperature, under the irradiation of simulated sunlight (I = 15 A, 300 s). The photothermal superamphiphobic fabrics with self-cleaning properties show great promise in the photothermal conversion field.

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Membranes in Solar‐Driven Evaporation: Design Principles and Applications

Yang

et al. 2023

Adv Funct Materials

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Solar‐driven evaporation process brings exciting opportunities to recover clean water and resources in a sustainable way from diverse sources like seawater and wastewater. Separation membranes, as a vital material in many environmental and energy applications, can contribute significantly to this process owing to their structural features. However, the unique roles of membranes in solar evaporator construction and process design are seldom recognized and not summarized yet from scientific principles and application demands, which forms the motivation of this review. Herein, the roles of membranes in different processes based on solar‐driven evaporation are focused and the design principles of membrane materials and devices to meet the requirements of these applications are discussed. Fabrication strategies for photothermal membranes are introduced primarily, followed by a discussion on how to design membrane materials, devices, and processes to pursue optimal performance and realize advanced functions accompanied by evaporation. Furthermore, the future of this field is forecast with both challenges and opportunities.

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Highly-efficient and salt-resistant CsxWO3@g-C3N4/PVDF fiber membranes for interfacial water evaporation, desalination, and sewage treatment

Cited by 50 publications

References 42 publications

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Polydopamine/SiO₂ Hybrid Structured Superamphiphobic Fabrics with Good Photothermal Behavior

Membranes in Solar‐Driven Evaporation: Design Principles and Applications

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Highly-efficient and salt-resistant CsxWO3@g-C3N4/PVDF fiber membranes for interfacial water evaporation, desalination, and sewage treatment

Cited by 50 publications

References 42 publications

Highly Efficient Solar Light Driven g-C3N4@Cs0.33WO3 Heterojunction for the Photodegradation of Colorless Antibiotics

Highly Efficient Solar Light Driven g-C3N4@Cs0.33WO3 Heterojunction for the Photodegradation of Colorless Antibiotics

Polydopamine/SiO2 Hybrid Structured Superamphiphobic Fabrics with Good Photothermal Behavior

Membranes in Solar‐Driven Evaporation: Design Principles and Applications

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Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Highly Efficient Solar Light Driven g-C₃N₄@Cs_0.33WO₃ Heterojunction for the Photodegradation of Colorless Antibiotics

Polydopamine/SiO₂ Hybrid Structured Superamphiphobic Fabrics with Good Photothermal Behavior