Polydopamine coating assisted synthesis of MnO2 loaded inorganic/organic composite electrospun fiber adsorbent for efficient removal of Pb2+ from water

Li, Yanzi; Zhao, Rui; Shen, Chao; Sun, Bolun; Wang, Ce; Li, Xiang

doi:10.1016/j.cej.2018.03.044

Cited by 128 publications

(47 citation statements)

References 51 publications

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“…A combinative utilization of UV‐triggered deposition and removal of MNPs on PDA surfaces is illustrated in Figure e. PDA is known to be able to capture heavy metal ions from polluted wastewater . Here, UV irradiation significantly accelerated the process and enabled the reversible use of a PDA surface.…”

Section: Resultsmentioning

confidence: 70%

UV‐Triggered Polydopamine Secondary Modification: Fast Deposition and Removal of Metal Nanoparticles

Zeng

Hou

et al. 2019

Adv Funct Materials

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Since the first report in 2007, polydopamine (PDA) coating has shown great potential as a general and versatile method to create functional nanocoatings on arbitrary substrates. Slow kinetics and poor controllability of the coating and secondary modification processes, however, have limited the further development of this attractive method. In this work, it is demonstrated that UV irradiation at 365 nm significantly accelerates the process of secondary modification of a PDA-coated surface. The kinetics of both thiol and amine modifications of PDA are increased 12-fold via UV irradiation, while the kinetics of metal ion reduction at the PDA interface is increased more than 550 times. Moreover, it is demonstrated that irradiating a PDA/metal nanoparticle composite surface with UV light at 254 nm leads to dissolution of the deposited metal nanoparticles (MNPs). Finally, grayscale metallic patterns, dynamic deposition, and removal of MNPs on PDA surface are realized with the proposed method.

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Section: Resultsmentioning

confidence: 70%

UV‐Triggered Polydopamine Secondary Modification: Fast Deposition and Removal of Metal Nanoparticles

Zeng

Hou

et al. 2019

Adv Funct Materials

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“…At present, there are various adsorbents containing carbon materials [14], biomaterials [15], chelating materials [16], metal oxide nanoparticles [17,18] and so on. However, most adsorbents, such as carbon materials, are limited in their applications because of their high cost, easy agglomeration, difficulty in processing and low adsorption efficiency, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Chitosan Stacking Membranes for Adsorption of Copper Ions

Zhang

Shi

et al. 2019

Polymers

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Chitosan (CS) stacking mats with excellent performance for adsorption of copper ions (Cu(II)) in wastewater were fabricated by alternating electrospinning/electrospraying. The hierarchical structure of the stacking membranes was designed by CS micro-hemispheres sandwiched between CS fibers. The CS stack membranes prepared by the electrospinning technology could effectively increase the specific surface area, and thus, facilitate the adsorption of copper ions. CS stacking membranes with three layers reached adsorption equilibrium within 60 min, and had a maximum absorbance of 276.2 mg/g. The absorbance performance was superior to most of the reported CS adsorbents. Compared with CS fiber mats which were dominated by CS chemical structure during adsorption, the stacking structure of CS membranes contributed to the high efficient capability, and exhibited the multilayer adsorption behavior. This study may develop a promising method for the design of environmentally-friendly natural polymer adsorbents to remove Cu(II) in wastewater.

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“…The spectrum of Pb 4f in Figure 5(f) exhibited that two characteristic peaks at 143.4 and 138.5 eV were assigned to Pb 4f 5/2 and Pb 4f 5/2 , respectively. Two peaks at 654.3 and 642.5 eV for Mn 2p 1/2 and Mn 2p 3/2 (Figure 5(d)) spin À orbit suggested the chemical state of Mn as Mn (IV) (Li et al 2018b), while the weak shift of the peak after adsorption was due to the interruption of Pb(II) (Liang et al 2017). From the XPS result of Fe 2p in Figure 5(e), the calculated Fe 2þ /Fe 3þ ratios of the MMCN before and after adsorption were around 0.5, which indicated a fact that the existence of Fe 3 O 4 in composite (Zhao et al 2016).…”

Section: Characterizations Of Materialsmentioning

confidence: 99%

Preparation of MnO2 modified magnetic graphitic carbon nitride composite and its adsorption toward Pb(II) in waste water

Xia

Liu

2021

Water Practice and Technology

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Based on graphitic carbon nitride (CN) nanosheets, a novel MnO2 modified magnetic graphitic carbon nitride composite (MMCN) was prepared via magnetization and in-situ deposition of MnO2. Then an array of characterizations and experiments were conducted to explore the physical and chemical properties of the synthesized MMCN material. The adsorption behavior and removal mechanism of the MMCN were also discussed intensively. The best pH value of Pb(II) of MMCN was 6. The maximum adsorption capacity of MMCN was as high as 187.6 mg/g, which was much higher than that of MCN and original CN, and removal percentage of Pb(II) was about 99%. The adsorption kinetics and isotherms were in accorded with pseudo-second-order model and Langmuir model, respectively. The chemical adsorption of Pb(II) indicated that MMCN was a successful modified sorbent and pretty efficient to remove Pb(II) in aqueous owing to the complexation and ion exchange of ample amino and hydroxyl groups. Moreover, MMCN could be separated easily from aqueous under an external field after reaction with its magnetic performance.

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Polydopamine coating assisted synthesis of MnO2 loaded inorganic/organic composite electrospun fiber adsorbent for efficient removal of Pb2+ from water

Cited by 128 publications

References 51 publications

UV‐Triggered Polydopamine Secondary Modification: Fast Deposition and Removal of Metal Nanoparticles

UV‐Triggered Polydopamine Secondary Modification: Fast Deposition and Removal of Metal Nanoparticles

Preparation of Chitosan Stacking Membranes for Adsorption of Copper Ions

Preparation of MnO2 modified magnetic graphitic carbon nitride composite and its adsorption toward Pb(II) in waste water

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