Aramid nanofibers/WS2 nanosheets co-assembled aerogels for efficient and stable Pb (II) adsorption in harsh environments

Zhang, Shunyi; Han, Xiangsheng; Cai, Hongzhen; Wu, Xiaochen; Yuan, Yanhao; Zhang, Yuxiao

doi:10.1016/j.cej.2022.138268

Cited by 13 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…New peaks at 351 and 420 cm −1 , assigned to the A 1g and E 2g photon modes of WS 2 , showed up in the Raman spectra of composite aerogels compared with pure CS, implying the presence of WS 2 nanosheets in hybrid aerogels (Figure S2). 19,20 The XRD diffraction patterns of composite aerogels displayed the characteristic layer-packing diffraction (002) of WS 2 at 14.4°, also indicating the presence of thinlayer WS 2 nanosheets in CS/WS 2 aerogels (Figure S3). 21 The potential interactions between chitosan and WS 2 nanosheets were studied by the FT-IR spectra and XPS of CS, WS 2 , and CS/WS 2 (x) aerogels.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Co-Assembled WS₂ Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Yuan

Han

Cai

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Construction of anisotropic micro-channels in aerogel-based evaporators has been considered as a promising way to solve the salt accumulation and contaminant influence issues in the solar-driven interfacial evaporation process, however, which still suffer from drawbacks like costly fabrications. Herein, composite aerogels with anisotropic micro-channels were constructed through a simple co-assembly strategy between biomass chitosan and WS2 nanosheets. Ascribing to the synergetic effects of photothermal conversion capabilities of WS2 nanosheets and hydrophilia of chitosan, as well as the oriented microporous channels throughout the aerogels, the obtained aerogels (CS/WS2) exhibited a max evaporation rate of ∼2.10 kg m–2 h–1 and a conversion efficiency of ∼87.9% under 1 sun illumination and presented continuous production of clean water even in acidic, alkaline, and organic dye solutions and high-salinity brines. Thus, this study paves a novel and simple strategy to build anisotropic micro-channels in aerogel evaporators for efficient and sustainable solar evaporation and desalination.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 97%

Co-Assembled WS₂ Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Yuan

Han

Cai

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…24 Moreover, ANF has a robust structure with superior strength and modulus, 22,25−27 endowing ANF-based materials with outstanding thermal stability, mechanical stability, and solvent tolerance. 22,23,28,29 Thus, applying ANF to prepare microbeads provides a possible way to construct robust adsorbents with outstanding adsorption capacity and durability.…”

Section: Introductionmentioning

confidence: 99%

“…Aramid fiber, a high-performance fiber with high strength and high modulus, , has been used as a robust adsorbent because of its rigid structure. − Most recently, aramid nanofibers (ANF), a one-dimensional nanomaterial derived from the aramid fiber, has attracted lot of attention because of its much larger surface area, higher reaction activity, and more active amide groups on the surface compared to those of the aramid fiber . Moreover, ANF has a robust structure with superior strength and modulus, ,− endowing ANF-based materials with outstanding thermal stability, mechanical stability, and solvent tolerance. ,,, Thus, applying ANF to prepare microbeads provides a possible way to construct robust adsorbents with outstanding adsorption capacity and durability.…”

Section: Introductionmentioning

confidence: 99%

Electrospray Preparation of Robust Aramid Nanofiber Microbead Adsorbents for Wastewater Treatment

Yang¹,

Zhao

Liu

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Adsorption is one of the promising techniques for effectively removing dyes from wastewater due to its low cost and high efficiency. However, most reported adsorbents still suffer from low adsorption capacity and stability under harsh conditions, which severely limit their practical application. Herein, we report a novel method to prepare robust aramid nanofiber (ANF) microbead adsorbents using electrospraying technology and solvent replacement method. The structure of the ANF microbeads can be easily manipulated by changing the coagulation baths, thus achieving fabricated ANF microbeads with a uniform and highly porous microstructure. The as-prepared ANF microbeads show high removal efficiency toward methylene blue (MB) with a maximum adsorption capacity of up to 267 mg/g, which can be attributed to the strong π−π stacking, hydrogen bonding, and electrostatic attraction between MB and the microbeads. Moreover, ANF microbeads show outstanding stability within a wide pH range (from 2 to 12) with an MB removal efficiency over 90% even after five adsorption−desorption cycles at pH = 12. Additionally, the ANF microbeads can maintain their structure integrity after the adsorption process and can be easily separated from the solution by static sedimentation because of their robust structure. This work provides a new strategy to design robust microbeads with excellent adsorption performance and stability, demonstrating their great potential in various environmental engineering applications.

show abstract

“…The dimethyl sulfoxide/potassium hydroxide (DMSO/KOH) superbase system, a two-phase equilibrium system, is often used to exfoliate polymer nanofibers (e.g., aramid and chitin nanofibers) by weakening the hydrogen bonds among polymer chains owing to its strong nucleophilicity. , DMSO, a safe and effective polar solvent in the superbase system, can swell cellulose microfibrils by breaking the inter- or intramolecular hydrogen bonds and dissolving some non-cellulosic components . Additionally, alkali solutions have been proven to hydrolyze ester bonds between hemicellulose and lignin, facilitating the dissolution and separation of non-cellulosic components in plant fibers .…”

Section: Introductionmentioning

confidence: 99%

Sustainable Biochar Nanosheets Derived from Sweet Sorghum Residues via Superbase Pretreatment

Lu,

Cai,

Han

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

Two-dimensional (2D) sheet-like biochar as promising alternatives to graphene nanosheets has gained significant attention in materials science while being highly restricted by its complicated synthetic steps. In this study, the dimethyl sulfoxide/potassium hydroxide (DMSO/KOH) superbase system was first used to pretreat sweet sorghum residues (SS) and then carbonized to prepare sheet-like biochar. Ascribing to the strong nucleophilicity of DMSO/KOH, a synergistic effect was achieved by partially removing non-cellulosic components in SS and swelling the amorphous region of cellulose, leaving more layered cellulose behind (∼46.5 wt %), which was favorable for the formation of 2D biochar nanosheets with high graphitization degrees (∼93.1%). This strategy was also suitable for other biomass fibers (e.g., straw, wood powders, and nuclear shells) to obtain sheet-like biochar. The resulting sheet-like biochar could be compounded with cellulose nanofibers to achieve the structural design of composites and solve the molding problem of biochar, which was beneficial for dyeing wastewater treatment. Thus, this work provides insight into a simple strategy for developing 2D ultrathin sheet-like biochar from sustainable biomass wastes.

show abstract

Aramid nanofibers/WS2 nanosheets co-assembled aerogels for efficient and stable Pb (II) adsorption in harsh environments

Cited by 13 publications

References 47 publications

Co-Assembled WS₂ Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Co-Assembled WS₂ Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Electrospray Preparation of Robust Aramid Nanofiber Microbead Adsorbents for Wastewater Treatment

Sustainable Biochar Nanosheets Derived from Sweet Sorghum Residues via Superbase Pretreatment

Contact Info

Product

Resources

About

Aramid nanofibers/WS2 nanosheets co-assembled aerogels for efficient and stable Pb (II) adsorption in harsh environments

Cited by 13 publications

References 47 publications

Co-Assembled WS2 Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Co-Assembled WS2 Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Electrospray Preparation of Robust Aramid Nanofiber Microbead Adsorbents for Wastewater Treatment

Sustainable Biochar Nanosheets Derived from Sweet Sorghum Residues via Superbase Pretreatment

Contact Info

Product

Resources

About

Co-Assembled WS₂ Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation

Co-Assembled WS₂ Nanosheets/Chitosan Aerogels with Oriented Micro-Channels for Efficient and Sustainable Solar Steam Generation