Mesoporous composite Ni-C-N/SA for selective adsorption of methylene blue from water

Dai, Chengyi; Zhang, Menghan; Guo, Xinwen; Ma, Xiaoxun

doi:10.1016/j.cej.2020.127181

Cited by 41 publications

(13 citation statements)

References 46 publications

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“…As shown in Figure a, the wide bands at around 3440 cm –1 of PUB 1 and PUN 1 were due to O–H and N–H vibrations . These bands weakened after adsorption MB, indicating that the hydroxyl groups played important roles in hydrogen bond formation in the MB adsorption process . Besides, it could be seen that the peak at 1390 cm –1 was enhanced.…”

Section: Resultsmentioning

confidence: 87%

“… 29 These bands weakened after adsorption MB, indicating that the hydroxyl groups played important roles in hydrogen bond formation in the MB adsorption process. 70 Besides, it could be seen that the peak at 1390 cm –1 was enhanced. This peak was assigned to the C–N stretching vibration of MB, which proved that the MB molecules were adsorbed onto biofoam adsorbents.…”

Section: Resultsmentioning

confidence: 95%

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Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Qiu

Zhang

et al. 2021

ACS Omega

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Human health is being threatened by cationic pollutants in wastewater, for example, methylene blue (MB) and Cu(II). Our research team successfully fabricated biofoam adsorbents from recycled bamboo waste that removed cationic pollutants via introducing bamboo fiber sources, i.e. , bamboo fiber, bamboo α-cellulose fiber, and bamboo nanocellulose fiber, into a polyurethane (PU) foam matrix. The biofoam adsorbent with 1 g of nanocellulose (PUN 1 ) presented high removal efficiencies for MB (95.52%) and Cu(II) (100%) in low cationic pollutant concentration aqueous solutions. The biofoam adsorbent with 1 g of bamboo fiber (PUB 1 ) also displayed excellent removal efficiency for MB (98.61%) at pH 11. Meanwhile, 100% removal of Cu(II) was obtained by PUB 1 at pH 7 (initial content = 15 mg/L). Furthermore, the PUN 1 sample had excellent reusability, evidenced by 61.25% removal of MB after five adsorption–desorption cycles, suggesting that PUN 1 is a promising renewable adsorbent for cationic pollutants. In addition, PUB 1 is a low-cost adsorbent with good adsorption efficiencies for MB in weak alkaline solutions and Cu(II) in neutral aqueous solutions.

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 95%

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Qiu

Zhang

et al. 2021

ACS Omega

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“…Therefore, the contribution provided by the composite PA matrix is negligible. Because the amine groups on the PA surface were coordinated with the nickel ions, they no longer have adsorption capacity. − The formation of coordination can also be verified by the SEM, XPS, and FT-IR spectrum tests. In Figure S9, both the SEM image and SEM-EDS data show that the amine groups have been well distributed on the interior pore surface.…”

Section: Resultsmentioning

confidence: 97%

A Highly Efficient and Stable Composite of Polyacrylate and Metal–Organic Framework Prepared by Interface Engineering for Direct Air Capture

Guo

Lv³

et al. 2021

ACS Appl. Mater. Interfaces

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We present a kilogram-scale experiment for assessing the prospects of a novel composite material of metal−organic framework (MOF) and polyacrylates (PA), namely NbOFFIVE-1-Ni@PA, for trace CO 2 capture. Through the interfacial enrichment of metal ions and organic ligands as well as heterogeneous crystallization, the sizes of microporous NbOFFIVE-1-Ni crystals are downsized to 200−400 nm and uniformly anchored on the macroporous surface of PA via interfacial coordination, forming a unique dual-framework structure. Specifically, the NbOFFIVE-1-Ni@PA composite with a loading of 45.8 wt % NbOFFIVE-1-Ni yields a superior CO 2 uptake (ca. 1.44 mol•kg −1 ) compared to the pristine NbOFFIVE-1-Ni (ca. 1.30 mol•kg −1 ) at 400 ppm and 298 K, indicating that the adsorption efficiency of NbOFFIVE-1-Ni has been raised by 2.42 times. Meanwhile, the time cost for realizing a complete adsorption/ desorption cycle in a fluidized bed has been shortened to 25 min, and the working capacity (ca. 0.84 mol•kg −1 ) declines only by 1.3% after 2000 cycles. The device is capable of harvesting 2.1 kg of CO 2 per kilogram of composite daily from simulated air with 50% relatively humidity (RH). To the best of our knowledge, the excellent adsorption/desorption performances of NbOFFIVE-1-Ni@PA position it as the most advantageous and practically applicable candidate for trace CO 2 capture.

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“…Generally, organic dyes have complex aromatic structures and various active groups including –N=N–, –NH 2 , –SO 3 H, –COOH, –OH, etc., which provides the opportunity of interacting with adsorbents through the π-π stacking, hydrogen bonding and electrostatic attraction [ 3 , 21 , 28 ]. Consequently, the dyes can be effectively removed from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behaviors of Cationic Methylene Blue and Anionic Reactive Blue 19 Dyes onto Nano-Carbon Adsorbent Carbonized from Small Precursors

et al. 2022

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In this work, an innovative nano-carbon material (N-CM) adsorbent was reported for exploring its adsorption behaviors toward cationic methylene blue (MB) and anionic reactive blue 19 (RB19) pollutants. The proposed N-CM was synthesized by a one-step solvothermal treatment of citric acid and zinc gluconate small precursors. N-CM consists of nanosheets that have an advantageous specific surface area, large sp2/sp3 hybridized domains, and abundant nitrogen/oxygen-containing surface functional groups. The synergistic effects of these features are conducive to the MB and RB19 adsorption. Different from anionic RB19 adsorption (79.54 mg/g) by the cooperative π-π stacking and hydrogen bonding, cationic MB adsorbed onto N-CM mainly by the electrostatic attraction at the natural pH solution (> pHpzc), with an adsorption capacity up to 118.98 mg/g. Interestingly, both MB and RB19 adsorption conformed to the pseudo-second order kinetic (R2 ≥ 0.995) and Langmuir isothermal (R2 ≥ 0.990) models, accompanied by similar maximum monolayer adsorption capacities of 120.77 and 116.01 mg/g, respectively. Their adsorption processes exhibited spontaneously endothermic characteristics. Moreover, N-CM showed superior selective capability toward MB in different mixed dye systems, with high removal efficiencies of 73–89%. These results demonstrate that the high-performance carbon adsorbent prepared from small precursors via low-temperature carbonization shows great potentials in wastewater treatment.

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Mesoporous composite Ni-C-N/SA for selective adsorption of methylene blue from water

Cited by 41 publications

References 46 publications

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

A Highly Efficient and Stable Composite of Polyacrylate and Metal–Organic Framework Prepared by Interface Engineering for Direct Air Capture

Adsorption Behaviors of Cationic Methylene Blue and Anionic Reactive Blue 19 Dyes onto Nano-Carbon Adsorbent Carbonized from Small Precursors

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