Facile Assembly of Polyaniline/Graphene Oxide Composite Hydrogels as Adsorbent for Cr(VI) Removal

Han, Xiaoyan; Liu, Yulan; Xiong, Lun; Huang, Huabo; Zhang, Qiao; Li, Liang; Yu, Xianghua; Lai, Wei

doi:10.1002/pc.25161

Cited by 47 publications

(12 citation statements)

References 48 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is strongly recommended that for achieving higher level of regeneration both duration and multi-cycling regeneration should be done. Previous research (Han et al 2019) highlighted that GO-related adsorbent can be regenerated by using 0.5 M NaOH or HCl solution also.…”

Section: Regeneration Studymentioning

confidence: 99%

Adsorption of Cr(VI) from aqueous solution on graphene oxide (GO) prepared from graphite: equilibrium, kinetic and thermodynamic studies

2020

View full text Add to dashboard Cite

The present work demonstrated the removal of hexavalent chromium from aqueous solutions on synthesized graphene oxide (GO) from graphite. The prepared GO was characterized by various analytical techniques such as X-ray diffraction, scanning electron micrograph, Fourier transformed infrared and zero point change. The entire metal adsorption study was conducted through batch mode with keeping constant stirring rate (150 rpm). The operating variables such as pH (2-8), contact time (1-60 min), adsorbent dose (0.005 g-0.01 g L −1) and initial concentration (5-80 µg L −1) were considered, and optimized variables were fixed at maximum percentage of removal. The studied results ascertained that the maximum removal (92.8%) was achieved at acidic pH(4). The equilibrium of Cr(VI) adsorption data was nicely fitted with Langmuir model with maximum adsorption capacity (q m) 1.222 µg g −1. The sorption kinetics was nicely explained with pseudo-first-order and intraparticle diffusion mechanism. Thermodynamics of Cr(VI) adsorption revealed that the adsorption was spontaneous, endothermic and entropy-driven process. Therefore, it is concluded that graphene oxide could be an effective and efficient alternative toward removal of Cr(VI) from aqueous solution.

show abstract

Section: Regeneration Studymentioning

confidence: 99%

Adsorption of Cr(VI) from aqueous solution on graphene oxide (GO) prepared from graphite: equilibrium, kinetic and thermodynamic studies

2020

View full text Add to dashboard Cite

show abstract

“…GD (25 mL, 5 wt%) was then added. After 2 h of stirring, the mixture was heated to 60 • C, and was heat-preserved for 2 h. Since the mass ratio of CS and CNCD in the prepared hydrogel could affect its sorption behavior, it was further optimized with maximum adsorption capacity as the aim [18]. As shown in Figure S3, the optimal mass fraction of CNCD was identified to be 0.8 wt%.…”

Section: Fabrication Of Cs/cncd Composite Hydrogelmentioning

confidence: 99%

Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel

Zeng

Peng

et al. 2021

Polymers

View full text Add to dashboard Cite

Due to its lethal effect on the human body and other creatures, Cr(VI) ions have attained widespread public attention, and an effective adsorbent for removing Cr(VI) ions is vital. Chitosan (CS)/cellulose nanocrystals grafted with carbon dots (CNCD) composite hydrogel with strong sorption ability and sensitive detection ability for Cr(VI) was formed. The cellulose nanocrystals (CN) offered a natural skeleton for assembling 3D porous structures, and then improved the sorption ability for Cr(VI); moreover, carbon dots (CD) acted as a fluorescent probe for Cr(VI) and provided Cr(VI) adsorption sites. With a maximum adsorption capacity of 217.8 mg/g, the CS/CNCD composite hydrogel exhibited efficient adsorption properties. Meanwhile, with a detection limit of 0.04 μg/L, this hydrogel was used for selective and quantitative detection of Cr(VI). The determination of Cr(VI) was based on the inner filter effect (IFE) and static quenching. This hydrogel retained its effective adsorption ability even after four repeated regenerations. Furthermore, the economic feasibility of the CS/CNCD composite hydrogel over activated carbon was confirmed using cost analysis. This study provided one new method for producing low-cost adsorbents with effective sorption and sensitive detection for Cr(VI).

show abstract

“…[7] A variety of sorbent materials including activated carbon, [8] sepiolite, [9] clay, [10] mesoporous silica, [11] mesoporous hybrid xerogel, [12] pansil, [13] hybrid aerogels, [14] oriented films (for instance lithium hectorite films) [15] have been studied and used for removing water-soluble dyes, such as methylene blue, methyl violet, procion, rhodamine-B, red MX-5B, oxazine, and methyl violet. Among them, graphite, [16] chitosan-based gels, [17][18][19] carbon-based nanomaterials of fullerene, [20][21] and carbon nanotube [22][23][24][25][26][27] have proved to be an efficient sorbents for removing such types of organic and inorganic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, morphology, and adsorption studies of ternary nanocomposite comprising graphene oxide, chitosan, and polypyrrole

et al. 2020

View full text Add to dashboard Cite

The present work reports the synthesis of a ternary nanocomposite GO‐CS‐PPy comprising of graphene oxide (GO), chitosan (CS), and polypyrrole (PPy). The ternary nanocomposite GO‐CS‐PPy was characterized by a variety of techniques like Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction analysis (XRD), thermogravimetric analysis, and differential thermal analysis. The in situ synthesis of ternary nanocomposite GO‐CS‐PPy was carried out in the presence of catalytic FeCl3. The SEM and TEM analyses reveal a clear transformation of GO into the nanocomposite form where the characteristic sheet‐like structure of the former was crushed and converted into small pieces of nonuniform size. Similarly, in the XRD, the diagnostic peak of GO is also shifted appreciably employing successful synthesis of ternary nanocomposite GO‐CS‐PPy. The thermal stability of the ternary nanocomposite GO‐CS‐PPy was also found to be enhanced as compared to the pristine GO, CS, and PPy individually. The ternary nanocomposite GO‐CS‐PPy was used as an efficient adsorbent for the removal of a popular anionic dye Congo red as well as for the removal of heavy metal ions like Cu2+ and Cd2+ from water. In both cases, the ternary nanocomposite GO‐CS‐PPy was found to be very effective and can be commercialized in near future after further comprehensive studies.

show abstract

Facile Assembly of Polyaniline/Graphene Oxide Composite Hydrogels as Adsorbent for Cr(VI) Removal

Cited by 47 publications

References 48 publications

Adsorption of Cr(VI) from aqueous solution on graphene oxide (GO) prepared from graphite: equilibrium, kinetic and thermodynamic studies

Adsorption of Cr(VI) from aqueous solution on graphene oxide (GO) prepared from graphite: equilibrium, kinetic and thermodynamic studies

Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel

Synthesis, characterization, morphology, and adsorption studies of ternary nanocomposite comprising graphene oxide, chitosan, and polypyrrole

Contact Info

Product

Resources

About